Safety technical measures for crossing roadway in coal mine roadway

In the 11907 contact lane, a fault was encountered during the excavation process, and the fault was produced at 177°∠41°.

H = 2.2 m. In order to ensure the safe and smooth construction of the excavation during the fault, the following safety technical measures are specially formulated:

Technical measures:

Cross-fault construction method

It is required to use a small cannon and a wind tunnel to dig a short branch and short excavation. It is required that each shot should not exceed 600 mm. Shed roof beam penetrated management using the management of the wedge, the wedge through the bolt waste materials, such as iron and Qianzi material. The lanes help the steel legs to prevent the inverted shed device. If there is an empty gang, the lanes must be filled and compacted, and the plastic woven nets and struts are used for support. If the roof area of ​​the roadway is more than 1 square meter, the anchor should be placed within the empty roof area (the spacing between the anchors is 800mm*800mm).

Construction of ordinary drill and blast method, using pneumatic drill anchor head or YT-28 drills, electric detonators MS Delay positive charge, on-line in series, the explosive grade 3 coal mine permissible emulsion explosive, a roll of water cannons per eye Mud, the length of the mud is strictly in accordance with the regulations. The use of divided eye-catching, divided charge, detonation, the number of shots per time is no more than 10, the depth of the eye when the support is 800mm, the eye volume per eye does not exceed 0.2kg of explosives, the gutter The eye does not exceed 0.4kg and the auxiliary eye is between the two. The frame support cycle progress is 0.6m, the maximum control top distance is less than 0.8m, and the minimum control top distance is less than 0.2m.

First, permanent support

1.19# Coal contact Shangshan roadway permanent support adopts anchor net beam support (special case adopts frame support), roadway net width × net height = 4.2 × 2.9m. The top is made of Ф20×2000mm high-strength anchors. Each anchor has 2 coils of resin anchoring agent. It is matched with Ф16×4000mm reinforced beams. The spacing between bolts is 800×800mm. It is matched with Ф15.24mm×6.3m anchor cable. Plate, 4 anchors of resin anchoring agent for each anchor cable, between anchor cables and rows, 1800mm×2000mm, arranged along the center of the roadway; the two roadway supports are strong anchors such as Ф20×2000mm, and each anchor is 2 rolls. Resin anchoring agent, the spacing between anchors is 800×800mm. Full roadway section laying Ф4.0mm, 50 × 50mm mesh woven metal mesh, stubble pressure of not less than 100mm, # 12 wire connection, connection spaced not more than 200mm.

2. When the roof crushing pressure is large or the top-supporting coal is constructed, when the strength of the anchoring mesh cable cable is not up to the design requirements, the trapezoidal steel shed is used, the shed is 600mm, and the backing plate is 400mm. Specifications: length × width × thickness =800mm×70mm×40mm, 6m×1.2m plastic mesh is laid in full section, the pressure is not less than 100mm, and it is connected by 14# wire, the connection spacing is less than or equal to 200mm. After the installation, each steel shed will play 4 struts, and the slab specifications: length × width × thickness = 580mm × 70mm × 70mm.

Second, temporary support

(1) Temporary support form

1. The construction process no matter good or bad stone slate roof, must adopt temporary support. The temporary support is supported by metal front beam. The front beam must use at least three intact Φ75mm seamless steel tubes with a length of 4.8m and a wall thickness of not less than 4.0mm. The back wood should be 1.6m long and the thickness should be no less than 50mm. Solid wood not less than 100mm; the lifting ring is bent into a circular diameter of Φ100mm by a steel plate with a thickness of 8mm, and the M20 nut is welded up. Each front beam must be suspended by two rings in a straight line (the line is parallel to the center line of the roadway). The spacing between the rings is the spacing of two adjacent rows of top anchors on a straight line. The maximum control top distance of the temporary beam temporary support is 1900mm, and the minimum control top distance is 300mm. It is strictly forbidden for personnel to work under the empty roof.

Safety technical measures

1. Strictly implement the system of knocking and helping. Before starting work, the team leader must conduct a comprehensive inspection of the safety of the work surface and confirm that there is no danger before the authorized personnel enter the work surface.

2. Excavation work is strictly prohibited for empty top work. The support within 10m of the heading face must be reinforced before blasting.

3, must take the front to explore support.

5, to shallow eye, more eye, less charge, put a small cannon, or hand rubbing method, try to avoid shaking the surrounding rock or cause a roof due to shooting. Support in time to minimize the exposure time of the top plate and reduce the exposed area. If the pressure increases, special support should be taken in time for the site.

7. In the construction process, it is necessary to adhere to the principle of “discovery and exploration, first exploration and then excavation”.

8. The underground personnel must be familiar with the water inrush: the pressure of the two groups is significantly increased, the bottom drum or cracks occur, water is generated, the lanes are covered with sweat and red, the water is increased, the air is cold, the mist is generated, the water color is mixed, and the water is mixed. There is a smell in the hair, and there is a hole in the drill and there is a stuck phenomenon. If the above water inrush is present, the cause should be immediately identified and reported to the dispatching room. If the situation is urgent, the personnel should be evacuated according to the disaster avoidance route.

9. Strict implementation of operating procedures, handover classes and safety inspection systems during construction. It is necessary to constantly observe the changes in the stability of the surrounding rock, and timely grasp the time when the faults, fracture zones, and lithologic abrupt zones are exposed. Once you find an abnormality, you should deal with it in time to prevent it from happening.

10. If the roof of the shot is difficult to control and manage, and there is a danger of falling roof, it should be changed by hand.

11. The underground electrical equipment should be placed in a place where the ventilation conditions are better and there is no water around;

12. Underground electrical equipment, cables and wires shall not be repaired and repaired;

13. Strictly implement the system of power transmission and stoppage. Power failure must be listed, and electricity and discharge should be carried out before work.

Blasting management

1. Eye-catching: When drilling the hole, do not swing the drill pipe up and down to ensure the direction of drilling. Do not stand under the drill pipe to avoid hurting people.

2. Charge:

(1) Apply high-pressure water or compressed air to clean the blasthole before charging, and then place the bottom mud.

(2) When you are charging, you should use a hand-drawn foot line and gently push the medicine roll into the fundus with a wooden or bamboo gun stick in one hand, and apply even force to make the medicine rolls meet. After the medicine is packaged, the ends of the two legs should be kinked.

(3) The application of water cannon mud and non-combustible, plastic clay for sealing mud, it is forbidden to use block materials for sealing mud. It is strictly forbidden to shoot the blasthole without sealing mud, insufficient sealing mud or not strict.

(4) When loading the cannon mud, pull the mud with one hand and use the gun stick in one hand, and gently tamper it.

3, shooting warning

(1), the evacuation distance of the gun: the detonation position must be set outside the 11907 lane, and the straight line distance is guaranteed to be 300m, the straight bend distance is 150m, and there is shelter cover. The length of the blasting busbar should meet the blasting requirements.

(2) When blasting, it is necessary to stand at all the channels that can reach the blasting site with a straight line of 300m and a straight bend of 150m. The team leader should assign responsible personnel to stand guard, and warning signs, railings or drawstrings should be set at the warning line.

(3) Before the blasting, the team leader must check the personnel situation and determine that there is no one in the working face and the warning line before issuing the detonation order. The blaster used the whistle as a warning number, and at least three whistle blows each time, each time between 5 and 10 seconds, and no problem can be detonated.

4, shooting

(1) Before the shooting, the cables, wind pipes and other equipment in the front and rear lanes of the shooting can be covered, and the tools are moved to the safe place behind the working surface.

(2) The gunners, the inspectors, the team leader must implement the "one gun and three inspection system" and the "three-person chain shot" system.

(3) The shooting work must be carried out by full-time gunners and certified to work. All blasting personnel, including blasting, drug delivery, and charging personnel, must be familiar with the performance of the blasting materials and the provisions of this regulation.

(4), the connection of the blasting busbar and the footline, and the inspection and blasting work of the blasting line. Only the gunners are allowed to operate by one person, and other personnel are strictly prohibited from engaging in this work.

(5), eye-catching and charging should not be carried out at the same time. It is strictly forbidden to put cannon and cannon.

(6) In case of one of the following circumstances, the drug is not allowed to be released:

1. When the gas concentration in the return airflow reaches 0.8% within 20m near the shooting location.

2. Within 20m of the shooting position, there will be uncleared coal gangue, when the mine car or other objects block the 1/3 section of the roadway.

3. When the working surface control top distance exceeds the specified time.

4. There is gas in the blasthole, and the temperature is high and low.

5. When the working face is insufficient.

5. Blasting requirements:

1. All blasting personnel, including the blasting personnel and the drug delivery and charging personnel must be familiar with the basic performance and use requirements of the blasting equipment and blasting materials;

2, eye-catching, charging, shooting, according to the blasthole layout and blasting instructions;

3. After the explosives are collected, they should be placed in the explosives box and locked. The middle of the explosives must not be stopped or transferred to others. The remaining explosives on duty must be returned to the explosives warehouse on duty; the electric detonators are only allowed to be placed in the explosive materials box, and they are carried. Lock, do not allow random, in case of loss.

4. Explosives and detonators must be stored separately in a special explosive material box and locked; the explosive material box must be placed in a place where the top plate is intact, the bracket is intact, and the machinery and electrical equipment are avoided. The blasting material box must be placed in a safe place outside the warning line during blasting. The distance between the explosive material box and the detonator box is not less than 15m.

5. When extracting a single electric detonator from a bundle of electric detonators, do not pull the tube hard to smash the tube body, or pull the tube body hard to rub the foot line. The bundled electric detonator should be smoothed and the front end line should be pulled out. Pull the detonator out. After a single electric detonator is withdrawn, its foot line must be twisted into a short circuit.

6. When assembling the explosive charge, the following rules must be observed:

A. It must be carried out near the blasting work site where the roof is well protected from electrical equipment and electrical conductors. It is strictly forbidden to sit on the blasting material box to assemble the explosive charge.

B. Assembling the explosive charge should prevent the electric detonator from being subjected to vibration, impact, breaking the foot line and damaging the insulation of the foot line.

C. The electric detonator must be installed at the top of the medicine roll. It is strictly forbidden to use electric detonators instead of bamboo and wooden sticks. The electric detonator must be fully inserted into the medicine roll. It is strictly forbidden to insert the electric detonator obliquely in the middle of the medicine roll or on the medicine roll.

D. After the electric detonator is inserted into the medicine roll, the detonator must be entangled with the foot line, and the electric detonator line is twisted into a short circuit.

6. After blasting, after 30 minutes (at least 30 minutes), the guns are blown away. The gunners, tile inspectors and team leaders must first inspect the blasting site to check the ventilation and gas.

Through fault safety technical measures

In the 11907 contact lane, a fault was encountered during the excavation process, and the fault was produced at 177°∠41°.

H = 2.2 m. In order to ensure the safe and smooth construction of the excavation during the fault, the following safety technical measures are specially formulated:

Technical measures:

Cross-fault construction method

It is required to use a small cannon and a wind tunnel to dig a short branch and short excavation. It is required that each shot should not exceed 600 mm. The roof management is managed by the I-beam shed, which is used to break through the wedge. The wedge material is made of iron materials such as scrap bolts and brazing. The lanes help the steel legs to prevent the inverted shed device. If there is an empty gang, the lanes must be filled and compacted, and the plastic woven nets and struts are used for support. If the roof area of ​​the roadway is more than 1 square meter, the anchor should be placed within the empty roof area (the spacing between the anchors is 800mm*800mm).

It is constructed by ordinary drilling and blasting method. The wind-driven anchor head or YT-28 wind drill is used for the eye. The millisecond delay electric detonator is charged in the forward direction, and the series is connected. The explosive used is a three-level coal mine permitting emulsion explosive, and each eye has a roll of water cannon mud. The length of the sealing mud is strictly in accordance with the regulations. The use of divided eye-catching, divided charge, detonation, the number of shots per time is no more than 10, the depth of the eye when the support is 800mm, the eye volume per eye does not exceed 0.2kg of explosives, the gutter The eye does not exceed 0.4kg and the auxiliary eye is between the two. The frame support cycle progress is 0.6m, the maximum control top distance is less than 0.8m, and the minimum control top distance is less than 0.2m.

First, permanent support

1.19# Coal contact Shangshan roadway permanent support adopts anchor net beam support (special case adopts frame support), roadway net width × net height = 4.2 × 2.9m. The top is made of Ф20×2000mm high-strength anchors. Each anchor has 2 coils of resin anchoring agent. It is matched with Ф16×4000mm reinforced beams. The spacing between bolts is 800×800mm. It is matched with Ф15.24mm×6.3m anchor cable. Plate, 4 anchors of resin anchoring agent for each anchor cable, between anchor cables and rows, 1800mm×2000mm, arranged along the center of the roadway; the two roadway supports are strong anchors such as Ф20×2000mm, and each anchor is 2 rolls. Resin anchoring agent, the spacing between anchors is 800×800mm. The full section of the roadway is laid with a Ф4.0mm, meshed 50×50mm woven metal mesh, the compression is not less than 100mm, and connected by 12# wire, the connection spacing is not more than 200mm.

2. When the roof crushing pressure is large or the top-supporting coal is constructed, when the strength of the anchoring mesh cable cable is not up to the design requirements, the trapezoidal steel shed is used, the shed is 600mm, and the backing plate is 400mm. Specifications: length × width × thickness =800mm×70mm×40mm, 6m×1.2m plastic mesh is laid in full section, the pressure is not less than 100mm, and it is connected by 14# wire, the connection spacing is less than or equal to 200mm. After the installation, each steel shed will play 4 struts, and the slab specifications: length × width × thickness = 580mm × 70mm × 70mm.

Second, temporary support

(1) Temporary support form

1. During the construction process, no matter whether the roof rock is good or bad, temporary support must be used. The temporary support is supported by metal front beam. The front beam must use at least three intact Φ75mm seamless steel tubes with a length of 4.8m and a wall thickness of not less than 4.0mm. The back wood should be 1.6m long and the thickness should be no less than 50mm. Solid wood not less than 100mm; the lifting ring is bent into a circular diameter of Φ100mm by a steel plate with a thickness of 8mm, and the M20 nut is welded up. Each front beam must be suspended by two rings in a straight line (the line is parallel to the center line of the roadway). The spacing between the rings is the spacing of two adjacent rows of top anchors on a straight line. The maximum control top distance of the temporary beam temporary support is 1900mm, and the minimum control top distance is 300mm. It is strictly forbidden for personnel to work under the empty roof.

Safety technical measures

1. Strictly implement the system of knocking and helping. Before starting work, the team leader must conduct a comprehensive inspection of the safety of the work surface and confirm that there is no danger before the authorized personnel enter the work surface.

2. Excavation work is strictly prohibited for empty top work. The support within 10m of the heading face must be reinforced before blasting.

3, must take the front to explore support.

5, to shallow eye, more eye, less charge, put a small cannon, or hand rubbing method, try to avoid shaking the surrounding rock or cause a roof due to shooting. Support in time to minimize the exposure time of the top plate and reduce the exposed area. If the pressure increases, special support should be taken in time for the site.

7. In the construction process, it is necessary to adhere to the principle of “discovery and exploration, first exploration and then excavation”.

8. The underground personnel must be familiar with the water inrush: the pressure of the two groups is significantly increased, the bottom drum or cracks occur, water is generated, the lanes are covered with sweat and red, the water is increased, the air is cold, the mist is generated, the water color is mixed, and the water is mixed. There is a smell in the hair, and there is a hole in the drill and there is a stuck phenomenon. If the above water inrush is present, the cause should be immediately identified and reported to the dispatching room. If the situation is urgent, the personnel should be evacuated according to the disaster avoidance route.

9. Strict implementation of operating procedures, handover classes and safety inspection systems during construction. It is necessary to constantly observe the changes in the stability of the surrounding rock, and timely grasp the time when the faults, fracture zones, and lithologic abrupt zones are exposed. Once you find an abnormality, you should deal with it in time to prevent it from happening.

10. If the roof of the shot is difficult to control and manage, and there is a danger of falling roof, it should be changed by hand.

11. The underground electrical equipment should be placed in a place where the ventilation conditions are better and there is no water around;

12. Underground electrical equipment, cables and wires shall not be repaired and repaired;

13. Strictly implement the system of power transmission and stoppage. Power failure must be listed, and electricity and discharge should be carried out before work.

Blasting management

1. Eye-catching: When drilling the hole, do not swing the drill pipe up and down to ensure the direction of drilling. Do not stand under the drill pipe to avoid hurting people.

2. Charge:

(1) Apply high-pressure water or compressed air to clean the blasthole before charging, and then place the bottom mud.

(2) When you are charging, you should use a hand-drawn foot line and gently push the medicine roll into the fundus with a wooden or bamboo gun stick in one hand, and apply even force to make the medicine rolls meet. After the medicine is packaged, the ends of the two legs should be kinked.

(3) The application of water cannon mud and non-combustible, plastic clay for sealing mud, it is forbidden to use block materials for sealing mud. It is strictly forbidden to shoot the blasthole without sealing mud, insufficient sealing mud or not strict.

(4) When loading the cannon mud, pull the mud with one hand and use the gun stick in one hand, and gently tamper it.

3, shooting warning

(1), the evacuation distance of the gun: the detonation position must be set outside the 11907 lane, and the straight line distance is guaranteed to be 300m, the straight bend distance is 150m, and there is shelter cover. The length of the blasting busbar should meet the blasting requirements.

(2) When blasting, it is necessary to stand at all the channels that can reach the blasting site with a straight line of 300m and a straight bend of 150m. The team leader should assign responsible personnel to stand guard, and warning signs, railings or drawstrings should be set at the warning line.

(3) Before the blasting, the team leader must check the personnel situation and determine that there is no one in the working face and the warning line before issuing the detonation order. The blaster used the whistle as a warning number, and at least three whistle blows each time, each time between 5 and 10 seconds, and no problem can be detonated.

4, shooting

(1) Before the shooting, the cables, wind pipes and other equipment in the front and rear lanes of the shooting can be covered, and the tools are moved to the safe place behind the working surface.

(2) The gunners, the inspectors, the team leader must implement the “one gun and three inspection system” and the “three-person chain shot” system.

(3) The shooting work must be carried out by full-time gunners and certified to work. All blasting personnel, including blasting, drug delivery, and charging personnel, must be familiar with the performance of the blasting materials and the provisions of this regulation.

(4), the connection of the blasting busbar and the footline, and the inspection and blasting work of the blasting line. Only the gunners are allowed to operate by one person, and other personnel are strictly prohibited from engaging in this work.

(5), eye-catching and charging should not be carried out at the same time. It is strictly forbidden to put a cannon and a cannon.

(6) In case of one of the following circumstances, the drug is not allowed to be released:

1. When the gas concentration in the return airflow reaches 0.8% within 20m near the shooting location.

2. Within 20m of the shooting position, there will be uncleared coal gangue, when the mine car or other objects block the 1/3 section of the roadway.

3. When the working surface control top distance exceeds the specified time.

4. There is gas in the blasthole, and the temperature is high and low.

5. When the working face is insufficient.

5. Blasting requirements:

1. All blasting personnel, including the blasting personnel and the drug delivery and charging personnel must be familiar with the basic performance and use requirements of the blasting equipment and blasting materials;

2, eye-catching, charging, shooting, according to the blasthole layout and blasting instructions;

3. After the explosives are collected, they should be placed in the explosives box and locked. The middle of the explosives must not be stopped or transferred to others. The remaining explosives on duty must be returned to the explosives warehouse on duty; the electric detonators are only allowed to be placed in the explosive materials box, and they are carried. Lock, do not allow random, in case of loss.

4. Explosives and detonators must be stored separately in a special explosive material box and locked; the explosive material box must be placed in a place where the top plate is intact, the bracket is intact, and the machinery and electrical equipment are avoided. The blasting material box must be placed in a safe place outside the warning line during blasting. The distance between the explosive material box and the detonator box is not less than 15m.

5. When extracting a single electric detonator from a bundle of electric detonators, do not pull the tube hard to smash the tube body, or pull the tube body hard to rub the foot line. The bundled electric detonator should be smoothed and the front end line should be pulled out. Pull the detonator out. After a single electric detonator is withdrawn, its foot line must be twisted into a short circuit.

6. When assembling the explosive charge, the following rules must be observed:

A. It must be carried out near the blasting work site where the roof is well protected from electrical equipment and electrical conductors. It is strictly forbidden to sit on the blasting material box to assemble the explosive charge.

B. Assembling the explosive charge should prevent the electric detonator from being subjected to vibration, impact, breaking the foot line and damaging the insulation of the foot line.

C. The electric detonator must be installed at the top of the medicine roll. It is strictly forbidden to use electric detonators instead of bamboo and wooden sticks. The electric detonator must be fully inserted into the medicine roll. It is strictly forbidden to insert the electric detonator obliquely in the middle of the medicine roll or on the medicine roll.

D. After the electric detonator is inserted into the medicine roll, the detonator must be entangled with the foot line, and the electric detonator line is twisted into a short circuit.

6. After blasting, after 30 minutes (at least 30 minutes), the guns are blown away. The gunners, tile inspectors and team leaders must first inspect the blasting site to check the ventilation and gas.

Through fault safety technical measures

In the 11907 contact lane, a fault was encountered during the excavation process, and the fault was produced at 177°∠41°.

H = 2.2 m. In order to ensure the safe and smooth construction of the excavation during the fault, the following safety technical measures are specially formulated:

Technical measures:

Cross-fault construction method

It is required to use a small cannon and a wind tunnel to dig a short branch and short excavation. It is required that each shot should not exceed 600 mm. The roof management is managed by the I-beam shed, which is used to break through the wedge. The wedge material is made of iron materials such as scrap bolts and brazing. The lanes help the steel legs to prevent the inverted shed device. If there is an empty gang, the lanes must be filled and compacted, and the plastic woven nets and struts are used for support. If the roof area of ​​the roadway is more than 1 square meter, the anchor should be placed within the empty roof area (the spacing between the anchors is 800mm*800mm).

It is constructed by ordinary drilling and blasting method. The wind-driven anchor head or YT-28 wind drill is used for the eye. The millisecond delay electric detonator is charged in the forward direction, and the series is connected. The explosive used is a three-level coal mine permitting emulsion explosive, and each eye has a roll of water cannon mud. The length of the sealing mud is strictly in accordance with the regulations. The use of divided eye-catching, divided charge, detonation, the number of shots per time is no more than 10, the depth of the eye when the support is 800mm, the eye volume per eye does not exceed 0.2kg of explosives, the gutter The eye does not exceed 0.4kg and the auxiliary eye is between the two. The frame support cycle progress is 0.6m, the maximum control top distance is less than 0.8m, and the minimum control top distance is less than 0.2m.

First, permanent support

1.19# Coal contact Shangshan roadway permanent support adopts anchor net beam support (special case adopts frame support), roadway net width × net height = 4.2 × 2.9m. The top is made of Ф20×2000mm high-strength anchors. Each anchor has 2 coils of resin anchoring agent. It is matched with Ф16×4000mm reinforced beams. The spacing between bolts is 800×800mm. It is matched with Ф15.24mm×6.3m anchor cable. Plate, 4 anchors of resin anchoring agent for each anchor cable, between anchor cables and rows, 1800mm×2000mm, arranged along the center of the roadway; the two roadway supports are strong anchors such as Ф20×2000mm, and each anchor is 2 rolls. Resin anchoring agent, the spacing between anchors is 800×800mm. The full section of the roadway is laid with a Ф4.0mm, meshed 50×50mm woven metal mesh, the compression is not less than 100mm, and connected by 12# wire, the connection spacing is not more than 200mm.

2. When the roof crushing pressure is large or the top-supporting coal is constructed, when the strength of the anchoring mesh cable cable is not up to the design requirements, the trapezoidal steel shed is used, the shed is 600mm, and the backing plate is 400mm. Specifications: length × width × thickness =800mm×70mm×40mm, 6m×1.2m plastic mesh is laid in full section, the pressure is not less than 100mm, and it is connected by 14# wire, the connection spacing is less than or equal to 200mm. After the installation, each steel shed will play 4 struts, and the slab specifications: length × width × thickness = 580mm × 70mm × 70mm.

Second, temporary support

(1) Temporary support form

1. During the construction process, no matter whether the roof rock is good or bad, temporary support must be used. The temporary support is supported by metal front beam. The front beam must use at least three intact Φ75mm seamless steel tubes with a length of 4.8m and a wall thickness of not less than 4.0mm. The back wood should be 1.6m long and the thickness should be no less than 50mm. Solid wood not less than 100mm; the lifting ring is bent into a circular diameter of Φ100mm by a steel plate with a thickness of 8mm, and the M20 nut is welded up. Each front beam must be suspended by two rings in a straight line (the line is parallel to the center line of the roadway). The spacing between the rings is the spacing of two adjacent rows of top anchors on a straight line. The maximum control top distance of the temporary beam temporary support is 1900mm, and the minimum control top distance is 300mm. It is strictly forbidden for personnel to work under the empty roof.

Safety technical measures

1. Strictly implement the system of knocking and helping. Before starting work, the team leader must conduct a comprehensive inspection of the safety of the work surface and confirm that there is no danger before the authorized personnel enter the work surface.

2. Excavation work is strictly prohibited for empty top work. The support within 10m of the heading face must be reinforced before blasting.

3, must take the front to explore support.

4,

5, to shallow eye, more eye, less charge, put a small cannon, or hand rubbing method, try to avoid shaking the surrounding rock or cause a roof due to shooting. Support in time to minimize the exposure time of the top plate and reduce the exposed area. If the pressure increases, special support should be taken in time for the site.

7. In the construction process, it is necessary to adhere to the principle of “discovery and exploration, first exploration and then excavation”.

8. The underground personnel must be familiar with the water inrush: the pressure of the two groups is significantly increased, the bottom drum or cracks occur, water is generated, the lanes are covered with sweat and red, the water is increased, the air is cold, the mist is generated, the water color is mixed, and the water is mixed. There is a smell in the hair, and there is a hole in the drill and there is a stuck phenomenon. If the above water inrush is present, the cause should be immediately identified and reported to the dispatching room. If the situation is urgent, the personnel should be evacuated according to the disaster avoidance route.

9. Strict implementation of operating procedures, handover classes and safety inspection systems during construction. It is necessary to constantly observe the changes in the stability of the surrounding rock, and timely grasp the time when the faults, fracture zones, and lithologic abrupt zones are exposed. Once you find an abnormality, you should deal with it in time to prevent it from happening.

10. If the roof of the shot is difficult to control and manage, and there is a danger of falling roof, it should be changed by hand.

11. The underground electrical equipment should be placed in a place where the ventilation conditions are better and there is no water around;

12. Underground electrical equipment, cables and wires shall not be repaired and repaired;

13. Strictly implement the system of power transmission and stoppage. Power failure must be listed, and electricity and discharge should be carried out before work.

Blasting management

1. Eye-catching: When drilling the hole, do not swing the drill pipe up and down to ensure the direction of drilling. Do not stand under the drill pipe to avoid hurting people.

2. Charge:

(1) Apply high-pressure water or compressed air to clean the blasthole before charging, and then place the bottom mud.

(2) When you are charging, you should use a hand-drawn foot line and gently push the medicine roll into the fundus with a wooden or bamboo gun stick in one hand, and apply even force to make the medicine rolls meet. After the medicine is packaged, the ends of the two legs should be kinked.

(3) The application of water cannon mud and non-combustible, plastic clay for sealing mud, it is forbidden to use block materials for sealing mud. It is strictly forbidden to shoot the blasthole without sealing mud, insufficient sealing mud or not strict.

(4) When loading the cannon mud, pull the mud with one hand and use the gun stick in one hand, and gently tamper it.

3, shooting warning

(1), the evacuation distance of the gun: the detonation position must be set outside the 11907 lane, and the straight line distance is guaranteed to be 300m, the straight bend distance is 150m, and there is shelter cover. The length of the blasting busbar should meet the blasting requirements.

(2) When blasting, it is necessary to stand at all the channels that can reach the blasting site with a straight line of 300m and a straight bend of 150m. The team leader should assign responsible personnel to stand guard, and warning signs, railings or drawstrings should be set at the warning line.

(3) Before the blasting, the team leader must check the personnel situation and determine that there is no one in the working face and the warning line before issuing the detonation order. The blaster used the whistle as a warning number, and at least three whistle blows each time, each time between 5 and 10 seconds, and no problem can be detonated.

4, shooting

(1) Before the shooting, the cables, wind pipes and other equipment in the front and rear lanes of the shooting can be covered, and the tools are moved to the safe place behind the working surface.

(2) The gunners, the inspectors, the team leader must implement the “one gun and three inspection system” and the “three-person chain shot” system.

(3) The shooting work must be carried out by full-time gunners and certified to work. All blasting personnel, including blasting, drug delivery, and charging personnel, must be familiar with the performance of the blasting materials and the provisions of this regulation.

(4), the connection of the blasting busbar and the footline, and the inspection and blasting work of the blasting line. Only the gunners are allowed to operate by one person, and other personnel are strictly prohibited from engaging in this work.

(5), eye-catching and charging should not be carried out at the same time. It is strictly forbidden to put a cannon and a cannon.

(6) In case of one of the following circumstances, the drug is not allowed to be released:

1. When the gas concentration in the return airflow reaches 0.8% within 20m near the shooting location.

2. Within 20m of the shooting position, there will be uncleared coal gangue, when the mine car or other objects block the 1/3 section of the roadway.

3. When the working surface control top distance exceeds the specified time.

4. There is gas in the blasthole, and the temperature is high and low.

5. When the working face is insufficient.

5. Blasting requirements:

1. All blasting personnel, including the blasting personnel and the drug delivery and charging personnel must be familiar with the basic performance and use requirements of the blasting equipment and blasting materials;

2, eye-catching, charging, shooting, according to the blasthole layout and blasting instructions;

3. After the explosives are collected, they should be placed in the explosives box and locked. The middle of the explosives must not be stopped or transferred to others. The remaining explosives on duty must be returned to the explosives warehouse on duty; the electric detonators are only allowed to be placed in the explosive materials box, and they are carried. Lock, do not allow random, in case of loss.

4. Explosives and detonators must be stored separately in a special explosive material box and locked; the explosive material box must be placed in a place where the top plate is intact, the bracket is intact, and the machinery and electrical equipment are avoided. The blasting material box must be placed in a safe place outside the warning line during blasting. The distance between the explosive material box and the detonator box is not less than 15m.

5. When extracting a single electric detonator from a bundle of electric detonators, do not pull the tube hard to smash the tube body, or pull the tube body hard to rub the foot line. The bundled electric detonator should be smoothed and the front end line should be pulled out. Pull the detonator out. After a single electric detonator is withdrawn, its foot line must be twisted into a short circuit.

6. When assembling the explosive charge, the following rules must be observed:

A. It must be carried out near the blasting work site where the roof is well protected from electrical equipment and electrical conductors. It is strictly forbidden to sit on the blasting material box to assemble the explosive charge.

B. Assembling the explosive charge should prevent the electric detonator from being subjected to vibration, impact, breaking the foot line and damaging the insulation of the foot line.

C. The electric detonator must be installed at the top of the medicine roll. It is strictly forbidden to use electric detonators instead of bamboo and wooden sticks. The electric detonator must be fully inserted into the medicine roll. It is strictly forbidden to insert the electric detonator obliquely in the middle of the medicine roll or on the medicine roll.

D. After the electric detonator is inserted into the medicine roll, the detonator must be entangled with the foot line, and the electric detonator line is twisted into a short circuit.

6. After blasting, after 30 minutes (at least 30 minutes), the guns are blown away. The gunners, tile inspectors and team leaders must first inspect the blasting site to check the ventilation and gas.

Through fault safety technical measures

In the 11907 contact lane, a fault was encountered during the excavation process, and the fault was produced at 177°∠41°.

H = 2.2 m. In order to ensure the safe and smooth construction of the excavation during the fault, the following safety technical measures are specially formulated:

Technical measures:

Cross-fault construction method

It is required to use a small cannon and a wind tunnel to dig a short branch and short excavation. It is required that each shot should not exceed 600 mm. The roof management is managed by the I-beam shed, which is used to break through the wedge. The wedge material is made of iron materials such as scrap bolts and brazing. The lanes help the steel legs to prevent the inverted shed device. If there is an empty gang, the lanes must be filled and compacted, and the plastic woven nets and struts are used for support. If the roof area of ​​the roadway is more than 1 square meter, the anchor should be placed within the empty roof area (the spacing between the anchors is 800mm*800mm).

It is constructed by ordinary drilling and blasting method. The wind-driven anchor head or YT-28 wind drill is used for the eye. The millisecond delay electric detonator is charged in the forward direction, and the series is connected. The explosive used is a three-level coal mine permitting emulsion explosive, and each eye has a roll of water cannon mud. The length of the sealing mud is strictly in accordance with the regulations. The use of divided eye-catching, divided charge, detonation, the number of shots per time is no more than 10, the depth of the eye when the support is 800mm, the eye volume per eye does not exceed 0.2kg of explosives, the gutter The eye does not exceed 0.4kg and the auxiliary eye is between the two. The frame support cycle progress is 0.6m, the maximum control top distance is less than 0.8m, and the minimum control top distance is less than 0.2m.

First, permanent support

1.19# Coal contact Shangshan roadway permanent support adopts anchor net beam support (special case adopts frame support), roadway net width × net height = 4.2 × 2.9m. The top is made of Ф20×2000mm high-strength anchors. Each anchor has 2 coils of resin anchoring agent. It is matched with Ф16×4000mm reinforced beams. The spacing between bolts is 800×800mm. It is matched with Ф15.24mm×6.3m anchor cable. Plate, 4 anchors of resin anchoring agent for each anchor cable, between anchor cables and rows, 1800mm×2000mm, arranged along the center of the roadway; the two roadway supports are strong anchors such as Ф20×2000mm, and each anchor is 2 rolls. Resin anchoring agent, the spacing between anchors is 800×800mm. The full section of the roadway is laid with a Ф4.0mm, meshed 50×50mm woven metal mesh, the compression is not less than 100mm, and connected by 12# wire, the connection spacing is not more than 200mm.

2. When the roof crushing pressure is large or the top-supporting coal is constructed, when the strength of the anchoring mesh cable cable is not up to the design requirements, the trapezoidal steel shed is used, the shed is 600mm, and the backing plate is 400mm. Specifications: length × width × thickness =800mm×70mm×40mm, 6m×1.2m plastic mesh is laid in full section, the pressure is not less than 100mm, and it is connected by 14# wire, the connection spacing is less than or equal to 200mm. After the installation, each steel shed will play 4 struts, and the slab specifications: length × width × thickness = 580mm × 70mm × 70mm.

Second, temporary support

(1) Temporary support form

1. During the construction process, no matter whether the roof rock is good or bad, temporary support must be used. The temporary support is supported by metal front beam. The front beam must use at least three intact Φ75mm seamless steel tubes with a length of 4.8m and a wall thickness of not less than 4.0mm. The back wood should be 1.6m long and the thickness should be no less than 50mm. Solid wood not less than 100mm; the lifting ring is bent into a circular diameter of Φ100mm by a steel plate with a thickness of 8mm, and the M20 nut is welded up. Each front beam must be suspended by two rings in a straight line (the line is parallel to the center line of the roadway). The spacing between the rings is the spacing of two adjacent rows of top anchors on a straight line. The maximum control top distance of the temporary beam temporary support is 1900mm, and the minimum control top distance is 300mm. It is strictly forbidden for personnel to work under the empty roof.

Safety technical measures

1. Strictly implement the system of knocking and helping. Before starting work, the team leader must conduct a comprehensive inspection of the safety of the work surface and confirm that there is no danger before the authorized personnel enter the work surface.

2. Excavation work is strictly prohibited for empty top work. The support within 10m of the heading face must be reinforced before blasting.

3, must take the front to explore support.

4,

5, to shallow eye, more eye, less charge, put a small cannon, or hand rubbing method, try to avoid shaking the surrounding rock or cause a roof due to shooting. Support in time to minimize the exposure time of the top plate and reduce the exposed area. If the pressure increases, special support should be taken in time for the site.

7. In the construction process, it is necessary to adhere to the principle of “discovery and exploration, first exploration and then excavation”.

8. The underground personnel must be familiar with the water inrush: the pressure of the two groups is significantly increased, the bottom drum or cracks occur, water is generated, the lanes are covered with sweat and red, the water is increased, the air is cold, the mist is generated, the water color is mixed, and the water is mixed. There is a smell in the hair, and there is a hole in the drill and there is a stuck phenomenon. If the above water inrush is present, the cause should be immediately identified and reported to the dispatching room. If the situation is urgent, the personnel should be evacuated according to the disaster avoidance route.

9. Strict implementation of operating procedures, handover classes and safety inspection systems during construction. It is necessary to constantly observe the changes in the stability of the surrounding rock, and timely grasp the time when the faults, fracture zones, and lithologic abrupt zones are exposed. Once you find an abnormality, you should deal with it in time to prevent it from happening.

10、如果放炮中顶板难以控制与管理、有冒顶的危险，应改用手镐方法掘进。

11、井下电气设备应安放在通风条件比较好，周围没有淋水的地方;

12、井下不得带电检修、搬迁电气设备、电缆和电线;

13、严格执行停送电制度，停电必须挂牌，工作前进行验电、放电，严禁带电作业。

爆破管理

1、打眼：钻眼时，钻杆不要上下左右摆，以保证钻进方向，钻杆下方不要站人，以免落下伤人。

2、装药：

(1)、装药前应用高压水或压缩空气对炮眼进行清孔工作,然后座底泥。

(2)、装药时要一手拉脚线，一手拿木制或竹制炮棍将药卷轻轻推入眼底，用力均匀，使药卷相接。药包装完后要将两脚线末端扭结。

(3)封泥应用水炮泥以及不燃性的，可塑性粘土，禁止使用块状材料做封泥。无封泥、封泥不足或不严的炮眼严禁放炮。

(4)、装填炮泥时，一手拉脚线，一手拿炮棍推填炮泥，用力轻轻捣实。

3、放炮警戒

(1)、放炮撤人距离：起爆位置必须设在11907联巷外，且保证直线距离300m, 拐直弯距离150m，并有掩体掩护，爆破母线长度应符合爆破要求。

(2)、爆破时，要在所有能通往爆破地点直线300m，拐直弯150m的各通道处站岗。班组长要委派责任心强的人员站岗，警戒线处应设置警戒牌、栏杆或拉绳。

(3)、爆破前，班组长必须清点人员情况，确定工作面及警戒线内无人时，方可下达起爆命令。爆破工以吹口哨为警戒号，每次至少要吹3次口哨，每次间隔5—10秒，无问题方可起爆。

4、放炮

(1)、放炮前要把放炮处前后巷道内的电缆、风水管等设备掩盖好，工具移放到工作面后安全地点内。

(2)、放炮员、瓦检员、班组长必须执行“一炮三检制”及“三人连锁放炮”制度。

(3)、放炮工作必须由专职放炮员担任，并持证上岗，所有爆破人员包括爆破、送药、装药人员，必须熟悉爆破材料性能和本规程规定。

(4)、爆破母线和脚线的连接以及爆破线路的检查与爆破工作，只准放炮员一人操作，其它人员严禁从事此项工作。

(5)、打眼和装药不得同时进行，严禁放糊炮及明炮。

(6)、有下列情况之一的不准装药放炮：

① 、放炮地点附近20m内回风流中瓦斯浓度达到0.8%时。

②、放炮地点20m内，有未清除的煤矸，矿车或其它物体堵塞巷道1/3断面以上时。

③、工作面控顶距超过规定时。

④、炮眼内有瓦斯涌出，温度忽高忽低时。

⑤、工作面风量不足时。

5、爆破要求：

①、所有爆破人员，包括放炮员及送药、装药人员必须熟悉爆破器材和爆破材料基本性能和使用要求;

②、打眼、装药、放炮要按照炮眼布置图及爆破说明书进行;

③、炸药领取后，应放到炸药箱内，并加锁，中间不得停留或转交他人，当班剩余炸药必须当班退回炸药库;电雷管只准放炮员放在爆破材料箱内随身携带，并加锁，不准随便乱放，以防丢失。

④、炸药和雷管必须分开存放在专用的爆炸材料箱内，并加锁;爆破材料箱必须放在顶板完好、支架完整，避开机械、电气设备的地点。爆破时必须把爆破材料箱放到警戒线以外的安全地点。爆炸材料箱与雷管箱间距不小于15m。

⑤、从成束的电雷管中抽取单个电雷管时，不得手拉脚线硬拽管体，也不得手拉管体硬拽脚线，应将成束的电雷管顺好，拉出前端脚线将雷管抽出。抽出单个电雷管后，必须将其脚线扭结成短路。

⑥、装配起爆药卷时，必须遵守下列规定：

A、必须在顶板完好避开电气设备和导电体的爆破工作地点附近进行。严禁坐在爆破材料箱上装配起爆药卷。

B、装配起爆药卷应防止电雷管受震动、冲击，折断脚线和损坏脚线绝缘层。

C、电雷管必须由药卷的顶部装入，严禁用电雷管代替竹、木棍扎眼。电雷管必须全部插入药卷内。严禁将电雷管斜插在药卷的中部或捆在药卷上。

D、电雷管插入药卷后，必须用脚线将雷管缠住，并将电雷管脚线扭结成短路。

6、爆破后，待30分钟后(至少30分钟)工作面炮烟吹散，放炮员、瓦检员和班组长必须首先巡视爆破地点，检查通风、瓦斯、顶板、拒爆、残爆等情况。如有危险情况，应立即处理。

7、通电以后拒爆时，爆破工必须先取下把手或钥匙，并将爆破母线从电源上摘下，扭结成短路，再等一定时间(使用瞬发电雷管时，至少等5分钟;使用毫秒延期电雷管时，至少等15分钟)，才可沿线路检查，找出拒爆的原因。

8、处理拒爆、残爆时，必须在当班班组长指导下进行，并应在当班处理完毕。如果当班未能处理完毕，当班爆破工必须在现场向下一班爆破工交接清楚。

处理拒爆时，必须遵守下列规定：

①由于连线不良造成的拒爆，可重新连线起爆。

②在拒爆炮眼0.3m以外另打与拒爆炮眼平行的新炮眼，重新装药起爆。

③严禁用镐刨或从炮眼中取出原放置的起爆药卷或从起爆药卷中拉出电雷管。不论有无残余炸药严禁将炮眼残底继续加深;严禁用打眼的方法往外掏药;严禁用压风吹拒爆(残爆)炮眼。

④处理拒爆的炮眼爆炸后，爆破工必须详细检查炸落的煤、矸，收集未爆的电雷管。

⑤在拒爆处理完毕以前，严禁在该地点进行与处理拒爆无关的工作。

9、打眼时根据煤层或岩层具体情况，对炮眼间距、炮眼深度及装药量进行适当调整。装药时严禁装垫药或盖药。

附放炮警戒图与避灾路线图

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