高位巨厚坚硬岩层下煤层的合理开采方法研究

Discussion on the reasonable mining method of coal seam under huge thick hard strata

为了防止高位巨厚岩层在层下煤层开采过程中引起冲击灾害,针对潞新二煤矿II102采区上覆巨厚岩层情况,结合数值模拟研究,通过对比留大煤柱开采、离层区注浆充填开采、采空区充填开采等多种开采方法对高位巨厚坚硬岩层破断运移影响,考虑安全、技术等因素,确定高位巨厚坚硬岩层条件下煤层开采技术方案为:离层区注浆充填开采方案。

Coal mining under huge thick strata can cause rock burst hazard easily. Taking huge thick hard strata above No. II102 working face as example, using numerical simulation method, the influenee of various mining methods such as retaining large coal pillar mining, grouting and filling mining in separated zone, and goaf filling mining on the breakage and movement of huge thick hard strata was studied. Considering the safety mining and technical conditions, grouting and filling mining in separated zone was reasonable.