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我矿是一个地质结构很复杂的多金属矿床,岩石物理机械性质变化很大。露天采用螺旋式内部绕道的开拓方法,采场东西、南北走向长度都不超过500公尺,剥离台阶10～15公尺,设计台阶宽34公尺,工作缐长60～90公尺,采用 By—20—2型钢丝绳冲击钻机凿岩,钻头直径148～198公厘。爆破系用露天二号铵锑岩石炸药和苏制十号硝铵炸药,采用分层、分节和一次装药的方法,用沉积土和风化岩尘充填采用传爆缐,
Mine is a complex geological structure of the polymetallic deposits, rock physical and mechanical properties vary widely. Open-air approach to the development of a spiral internal bypass, stope things, the length of both north and south are not more than 500 meters, stripping the stairs 10 to 15 meters, the design width of 34 meters, working long 60 to 90 meters long by By -20-2 wire rope impact drill rock drilling, drill diameter 148 ~ 198 mm. Explosion system with open-air two ammonium antimony rock explosives and the Soviet-made No. 10 ammonium nitrate explosives, the use of stratification, section and a charge method, with the deposition of soil and weathering rock dust filled with the explosion Bang,