推覆构造含水体下缩小防水煤柱开采研究与实践

Thestudy and practice of reducing waterproof coal pillars under nappe structure Aquifer in coal mining

通过对淮南国投新集公司新集二矿开采有影响的推覆构造含水体覆岩水文、工程地质条件进行分析,结合相似材料模拟和数值模拟分析方法研究了覆岩破坏规律,并对最大导水裂隙带高度进行预测,最终合理缩小防水煤柱,成功在防水煤柱内采出煤炭393.7万吨。实践证明,综合各种因素考虑,在推覆构造含水体下缩小防水煤柱开采是可行的,同时《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》中防水煤岩柱留设的理论、计算公式和参数等有待进一步认识。

Through analyzing the overlying rock hydrology, engineering geological conditions of nappe structure aq-uifer in SDIC Xinji NO. 2 Mine of Huainan, we studied the overburden failure law, predicted the maximum heightof water flowing fractured zone, reduced the waterproof coal pillars reasonably, and mined the coal 3. 937million tonfinally. Practice has proved that reducing waterproof coal pillars under nappe structure Aquifer is feasible after vari-ous factors were considered;At the same time, the theory, formulas and parameters of waterproof coal pillar designin Regulations for Mining under Buildings, Water, Rail and Major Roadway should be further understood.