保护层开采过程中上覆煤岩体的变形卸压效果数值模拟  

Numerical Simulation of the Overlying Coal-rock's Deformation Relief Effect During the Protective Layer Mining Process

作　　者：谢景娜[1] 罗新荣[1,2] 周昀涵[1] 吴丽丽[1] 张军亮[1] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《煤矿安全》2012年第5期163-165,169,共4页Safety in Coal Mines

基　　金：国家自然科学基金重点资助项目(50534090);国家重点基础研究发展计划(973计划)资助项目(2005CB221506);国家科技支撑计划资助项目(2007BAK00168-1);"十一五"国家科技支撑计划资助项目(2007BAK2805)

摘　　要：利用有限元软件ANSYS模拟下保护层开采过程,通过推进不同距离被保护层应变、应力场的变化情况,确定保护层卸压范围。结果表明,被保护层的膨胀变形率在0.35%～1.18%,与实测煤层的膨胀变形量0.56%相比基本吻合;稳定有效卸压区域位于开切眼前方50 m到工作面后方60 m范围内与实际测量数据相吻合。The artical uses FEM software ANSYS to simulate the mining process of under-protecting coal stratum.Through the changing situation of strain and stress fields of protected seam when advancing different distances,the relief range of protective layer is determined.The simulation result shows that the swelling deformation rate of the protective layer is 0.35% to 1.18%,which basic agrees with the measured swelling deformation rate of 0.56%.The stable and effective relief zone is located between 50 m ahead of open-off cut and 60 m behind the working face,which is identical with the actual measurement data.

关 键 词：ANSYS 下保护层 数值模拟 应变与应力场 卸压范围 

分 类 号：TD322[矿业工程—矿井建设]