孤岛面沿空掘巷煤柱尺寸优化及能量分析  

Size optimization and energy analysis of coal pillar in the driving roadway along gob of the isolated coalface

作　　者：崔楠[1,2] 马占国 杨党委[1] 戚福周 杨卫明[2] 罗宁 周跃进 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国重点实验室,江苏徐州221116 [2]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2017年第5期914-920,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51674250;51323004);江苏省"六大人才高峰"高层次人才计划项目;深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1409);深部岩土力学与地下工程国家重点实验室专项基金项目

摘　　要：针对王庄煤矿深部采区8102孤岛面特殊生产地质条件,建立数值模拟计算模型,分析煤柱宽度对侧向支撑压应力、巷道表面位移、塑性区分布和巷帮应力等参量的影响规律;开发单元可释放弹性应变能计算及其与TECPLOT耦合分析程序,研究了孤岛面沿空掘巷煤柱中弹性应变能密度的分布特征。结果表明:随着煤柱宽度增大,可释放弹性应变能密度增加,耗散应变能密度减小。煤柱宽度为5 m时,煤柱中形成两部分楔形区域,损伤破坏严重;当煤柱宽度大于10 m时,煤柱中存在稳定的弹性核,可释放弹性应变能密度分布梯度较小,可避免因弹性能急剧集聚而发生的动力灾害。According to the special geological condition for production at isolated coalface 8102 in the deep mining area of Wangzhuang coal mine, a numerical simulation computation model was established, and the influence law of coal pillar width on such parameters as side abutment pressure stress, roadway surface displacement, plastic area distribution, and roadway wall stress was analyzed. A program was developed to work out the releasable elastic strain energy per unit and analyze its coupling with TECPLOT, and the distribution characteristics of elastic strain energy density of isolated coalface were studied. Analysis results have indicated that with the increase of coal pillar width, the density of releas- able elastic strain energy rises, and the dissipative strain energy density decreases. When the coal pillar width is 5 m, two wedge areas are formed in the coal pillar, resulting in serious damage; when the coal pillar width is more than 10 m, stable elastic core exists in the coal pillar, and the gradient of releasable elastic strain energy density is smaller, which can avoid dynamic disasters due to the rapid accumulation of elastic energy.

关 键 词：孤岛面 沿空掘巷 煤柱宽度 优化 应变能密度 

分 类 号：TD823[矿业工程—煤矿开采]