工作面超前支护段强动压巷道围岩应力优化技术研究  

Study on Optimization Technology of Surrounding Rock Stress in High Dynamic Pressure Roadway

作　　者：何团 黄志增[2,3] 李春睿[2,3] 洛锋 王东攀[2,3] 

机构地区：[1]河北工程大学矿业与测绘工程学院河北省煤炭矿井建设工程技术研究中心,河北邯郸056038 [2]煤炭科学研究总院开采研究分院,北京100013 [3]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《煤矿开采》2018年第1期81-84,共4页Coal Mining Technology

基　　金：国家自然科学基金项目(51504135);煤炭科学研究总院科技创新基金(2015ZYJ001)

摘　　要：以芦子沟矿3107特厚煤层综放工作面为工程背景,应用数值模拟分析了3107工作面采动阶段煤柱侧帮围岩应力动态变化特征,巷道煤柱侧帮围岩受采动影响强烈。理论分析了回采巷道强动压显现机理,基于此,提出强动压巷道顶板大深度预切缝卸压技术,并阐述了其技术原理。预切缝后,沿空巷道超前支护段围岩应力降低,侧向支承压力峰值位置向工作面中部移动,沿空巷道超前支承压力峰值位置向工作面推进方向前移,能够有效改善超前支护段巷道围岩应力状态。数值模拟及现场实测结果表明预切缝后超前支护段巷道围岩稳定,巷道变形量减小,矿山压力显现缓和。It taking 3107 fully mechanized caving face with extra thick coal seam in Luzigou coal mine as background, the dynamicchange features of surrounding rock stress of coal pillar side in the roadway during mining stage of 3107 working face was analyzed bydetailed numerical simulation analysis, mining influence of surrounding rock was intensity, appearance mechanism of roadway intense-ly dynamic pressure was analyzed in theory, based on it, large depth pre-slicing releasing technique in roof of intensely dynamic road-way was put forward, and then mechanism was illustrated. After slicing, surrounding rock stress of roadway along goaf in advancedsupporting section decreased obviously, the position of the peak value of lateral abutment pressure moved toward the middle part ofworking face, the peak value of advanced abutment pressure moved toward cutting direction of working face, and then surroundingrock stress state could be improved obviously, the results of numerical simulation and field measured showed that surrounding rock ofroadway was stability after slicing, and roadway convergence decreasing, coal pressure relaxed alleviate.

关 键 词：超前支护 强动压巷道 围岩应力 切缝卸压 

分 类 号：TD323[矿业工程—矿井建设]