采高对断层煤柱支承应力及断层活化规律影响研究  

Study on the Influence of High-height on Stress and Fault Activation of Fault Pillar

作　　者：赵庆东[1] 钟旭[1] 高琳[2] 牛福宝 

机构地区：[1]山东能源新汶矿业集团翟镇煤矿,山东泰安271200 [2]山东科技大学,山东泰安271000

出　　处：《煤》2017年第8期5-6,9,共3页Coal

基　　金：国家自然科学基金资助项目(51574155);泰安市科技发展计划项目(2015ZC1058)

摘　　要：采用FLAC^(3D)数值软件,建立下盘向正断层开采数值模型,研究了不同采高条件下,断层煤柱内的支承应力演化特征和断层活化失稳规律。研究表明,采高对断层煤柱内的支承应力及断层面上的剪切应力和法向应力比值影响显著,随采高增大,断层保护煤柱发生塑性失稳时的煤柱尺寸明显增大,且断层活化失稳的时间越早。相同条件,采高增大时,为防止煤柱失稳和断层活化而留设的保护煤柱尺寸需相应增加,断层附近开采时工作面和回采巷道需加强支护强度。By using FLAC^3D numerical software, the numerical model of the normal fault mining is established, and the stress evolution characteristics and fault activation instability of the fault pillar are studied under different conditions. Research shows that the mining height are broken inside the bearing stress of coal pillar of faults and fault of the ratio of shear stress and normal stress on the surface of the effect significantly, with the increase of mining height are broken, the fault protection coal pillar size of coal pillar of the plastic in- stability occurs obviously increase, and the unstability of the fault activation time sooner. The same conditions, the increase of mining height are broken, to prevent instability of coal pillar and fault activation and protecting pillar size by the need to increase, fault near mining face and roadway, need to strengthen the support strength.

关 键 词：正断层 支承应力 断层活化 采高 

分 类 号：TD323[矿业工程—矿井建设]