用巷道卸压法减小厚煤层下分层回采巷道压力

Decreasing the load of next slice entryway in thick seam by relieving method

介绍卸压巷的设计原理,论述在下分层放顶煤开采时,为保护下分层巷道而开掘卸压巷,能够从根本上改善被保护巷道的受力状况,从而确保了巷道在使用期间免遭破坏,并给出了卸压巷参数的选择方法及开掘卸压巷时需注意的问题。

The paper introduces the design theory of relieving method on entryway and indicates that driving a relieving way can protect the entryway of next slice from being destroyed in longwall topcoal caving mining. It also presents the parameters and the problems to be taken good care of when a relieving way is extracted.