充填体不接顶时煤柱位移与应力状态分析  

Analysis of Pillar Displacement and Stress State with roof Unconnected in Backfilling Mining

作　　者：颜丙双[1,2] 孙英天[3] 

机构地区：[1]煤炭科学研究总院开采设计研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]黑龙江煤矿安全监察局哈东监察分局,黑龙江双鸭山155100

出　　处：《煤炭技术》2016年第10期100-103,共4页Coal Technology

摘　　要：针对巷柱式充填开采工作面充填体柱不接顶的情况,建立了煤柱和充填体相互作用的力学及数值计算模型,通过理论和数值模拟计算,得出了充填体不接顶时煤柱位移与应力场的变化规律。充填体接顶时,煤柱应力等值线分布均匀,应力集中系数较小,应力影响扩散角较大,影响深度较小;充填体不接顶时,煤柱应力等值线密集,应力集中系数较大,应力影响扩散角较小,影响深度较大。Building mechanical and numerical model of pillar and backfilling body for backfilling not full situation. The rules of pillar displacement and stress filed are reported respectively by theoretical and numerical calculation. The pillar stress contour was well distributed, stress concentration factor and influence depth were relatively small,the stress diffusion angle was relatively large when backfilling body was fill of goaf. The results were opposite when backfilling body was not full of the goaf.

关 键 词：充填体 煤柱 巷柱式 

分 类 号：TD823.7[矿业工程—煤矿开采]