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马格涅季托夫矿井所采21号矿块为急倾斜厚矿体。围岩普氏硬度系数f=10～13,矿石坚硬、有中等裂隙度。矿石的强度和弹性征特为:σ_c=80～110兆帕,σ_p=7～9兆帕,μ=0.26～0.31。矿体开采是用深孔爆破向补偿空间挤压崩矿的阶段强制崩落法。阶段高度80米,矿块尺寸20(40)×30(50)×80米。采用电耙和-4TM振动设备出矿。矿块回采从两个水平钻孔:从原先的运输横巷和上阶
The No. 21 ore block in the Magneti Tuffov mine is a steep, thick ore body. Surrounding rock Plains hardness coefficient f = 10 ~ 13, the ore is hard, with medium fracture degree. Ore strength and elastic characteristics are as follows: σ_c = 80-110 MPa, σ_p = 7-9 MPa, μ = 0.26-0.31. Ore mining is the use of deep-hole blasting to compensate for the collapse of the collapse of the collapse of the collapse of the law. Stage height of 80 meters, block size 20 (40) × 30 (50) × 80 meters. Electric rake and -4TM vibration equipment out of the mine. Nugget mining was drilled from two levels: from the original transport lane and upper level