近距离煤层煤柱下方底板应力分布规律  

Floor Stress Distribution Laws Under Coal Pillar in Close Distance Coal Seams

作　　者：罗吉安[1,2] 王连国[2] 

机构地区：[1]安徽理工大学理学院,安徽淮南232001 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《煤矿安全》2014年第2期29-31,34,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51274191);国家重点基础研究发展规划(973计划)资助项目(2010CB226805);安徽理工大学博士基金资助项目

摘　　要：近距离煤层下分层回采巷道的布置易受采后残留煤柱引起的集中应力的影响,通过对煤柱内集中应力分布情况的分析,提出了更加接近真实情况的煤柱受力模型,并在此基础上运用弹性力学理论和数值计算软件Mathcad结合具体的工程实践,分析了不同宽度煤柱下方底板应力传递及分布规律,计算了底板岩层不同深度水平截面上应力分布范围。The mining roadway layout in the lower coal seam in close distance coal seam is affected by the concentrated stress caused by the residual pillar in upper layer,through the analysis of the distribution situations of the concentrated stress in the coal pillar,the force model which is closer to the real situation is put forward,then combined with the specific practice,the laws of the floor stress transfer and distribution are analyzed and the range of the stress distribution on the horizontal section of different depths in the floor strata by using elasticity theory and numerical calculation software Mathcad.

关 键 词：近距离煤层 煤柱 集中应力 回采巷道 底板应力 煤柱宽度 

分 类 号：TD322[矿业工程—矿井建设]