【摘要】 文中对金牛公司九仗沟矿区顶柱地质条件、回收方案、中深孔爆破参数、爆破方案进行了仔细分析,制定了合理方案,为顶柱的顺利回收创造了有利条件。对于中厚、中等以上稳固的矿柱,通过在矿体下盘布置采准工程。使用中深孔爆破法进行回收,取得了理想效果,也为顶板中等稳固的同类矿山提供了参考价值。更多还原

【Abstract】 With carefully analysing geological condition of the crown pillars in Jiuzhanggou area,as well as recov- ering method,parameters about blast,blasting scheme,and making the reasonable recovery method,advantageous condition for successfully recovering these pillars was created.For medium-thick and moderately stable ore- body,being laid preliminary projects in ore block footwall,with medium-longth hole blast,ideal effect was ob- tained in the recovery,reference value was also provided for moderately stable pillars of similar mine.更多还原