刀柱采空区上方遗弃煤层上行开采可行性判定

针对刀柱采空区上方遗弃煤层开采问题，分析了现有上行开采可行性判定方法的不足.受关键层理论启迪，基于刀柱采空区上方岩层可形成的结构和上层煤开采对层间岩层的影响，提出了关键层叠合破断距的概念，形成了“5步法”刀柱采空区上方遗弃煤层上行开采可行性判定理论及方法.用本文提出的方法判定白家庄矿8号煤层刀柱采空区上方遗弃的6号煤层可以上行开采，并在生产实际中实施，开采情况正常.

Feasibility on the upward mining of the left over coal above goaf with pillar supporting method

In allusion to the left over coal above goaf with pillar supporting method,the deficiency of the decision method on feasibility on the upward mining was analyzed, the total fracture interval of key strata was proposed on the basis of key strata theory，the new decision theory and “five step method ” on feasibility on the upward mining was presented considering rock structure and mining effect. At last,it was determined as feasible that the left over No6 coal above the No8 coal goaf with pillar supporting method in Baijiazhuang Coal Mine of Xishan Coal Electricity Group Company, operational experience in Baijiazhuang Coal Mine shows that it provides a feasible method to determine feasibility on the upward mining.