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我矿于1958年建矿。南山为露天开采,北山为坑内开采,曾先后采用倾斜扇形深孔阶段强制崩落法、平行扇形深孔阶段强制崩落法、水平扇形深孔挤压爆破阶段崩落法和中深孔分段挤压爆破阶段崩落法进行生产。实践表明,前二种方法效果不佳,没有推广;后两种方法,尤其是水平扇形深孔挤压爆破阶段崩落法,优点比较突出,取得较好
Mine built mine in 1958. Nanshan is open pit mining, and Beishan is pit mining. It has successively adopted forced caving method such as inclined fan-shaped deep-hole stage, forced caving method in parallel fan-shaped deep-hole stage, horizontal fan-shaped deep hole extrusion blasting caving and medium- The stage of caving method of production. Practice shows that the first two methods are ineffective and have not been popularized. The latter two methods, especially the horizontal fan-shaped deep-hole caving blasting method, have the advantages of more obvious advantages and better results