柴里煤矿23下614工作面断层与顶底板应力变化规律研究

Study on Stress Change Law of Fault and Roof & Floor in No.23 lower 614 Working Face of Chaili Coal Mine

本文研究断层与顶底板应力变化规律,运用相似材料试验法,模拟柴里煤矿23下614工作面开采条件,分析试验数据及相关应力变化曲线图,得出变化规律:顶底板应力越靠近断层带,应力集中程度越明显,一般不会越过断层,过断层时,断层带下覆岩位移及应力易发生突变;断层煤柱留设宽度越小,断层活化越明显。

This paper mainly studies the law of stress variation between fault and roof to floor.Similar material test method is used to simulate the mining conditions of No.23 lower 614 working face in Chaili Coal Mine.The test data and stress curve are analyzed,and the variation law is obtained.The closer the roof-to-floor stress is to the fault zone,the more obvious the stress concentration is,and generally it will not cross the fault.The displacement and stress of overlying strata under the fault zone are prone to a sudden change when crossing the fault.The smaller the width of coal pillar in the fault is,the more obvious the fault activation is.