(1) Mine rock loose work Perforated blasting and mechanical methods are often used for the loosening of ore in open pit mines. The crushing of the plow machine is only applicable to rocks with f=1~3 or medium-fractured and strongly fractured ore with f=4~7; and ore with strong fractures with f=8~9. Common perforating machinery and equipment include down-the-hole drilling rigs , cone drilling rigs , rock drilling rigs , and hydraulic rock drills . (2) Principles for supporting construction equipment of earth and stone works 1. Production capacity matching: The amount of ore that has been loosened on the working surface is required to meet the loading capacity of the excavator for a certain number of days. The capacity of mining, transportation and drainage equipment should be reserved with a certain wealth factor, and the order should be increased. 2, the concept of the car shovel ratio: refers to the average number of transport vehicles (dump trucks) assigned to each excavator. 3. The main production links are matched with the auxiliary production links. 4. Excavation (production) process is compatible with the conditions of ore deposits Fruit Jar,Baby Cream Jar,Cream Storage Jars,Plastic Cream Jar SHAOXING CARESO PLASTIC CO., LTD. , https://www.zjcareso.com