特厚煤层综放沿空煤巷煤柱宽度及控制研究  

Research on coal pillar width and control of gob side entry with fully-mechanized caving mining in extra thick coal seam

作　　者：郭金刚[1,2] 李耀晖 何富连 秦宾宾[1] GUO Jingang;LI Yaohui;HE Fulian;QIN Binbin(School of Energy&Mining Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Jinneng Holding Group,Datong 037003,China)

机构地区：[1]中国矿业大学(北京)能源与矿业学院,北京100083 [2]晋能控股集团,山西大同037003

出　　处：《煤矿安全》2021年第10期190-195,202,共7页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51974317);中国矿业大学(北京)越崎杰出学者奖励计划资助项目(800015Z1138);中央高校基本科研业务费专项资金资助项目(800015J6)。

摘　　要：为探究特厚煤层综放沿空煤巷窄煤柱的合理宽度,以某矿8305工作面为研究对象,采用理论分析、数值模拟和现场实践相结合的方法,通过内外应力场理论、极限平衡理论和沿空巷道煤柱帮的支护条件确定煤柱宽度的合理范围为5.4~9.9 m,根据数值模拟不同宽度煤柱的水平零位移面和垂直应力峰值分布规律确定煤柱的合理宽度为6 m,并提出针对性围岩控制技术。结果表明:沿空巷道在掘进和回采期间顶底板移近量、实体煤帮和煤柱帮的变形量较小,围岩控制效果良好。In order to study the reasonable width of coal pillar in gob side entry of fully mechanized top coal caving in extra thick coal seam, the 8305 working face is taken as the research object, and the method of theoretical analysis, numerical simulation and field practice is adopted. The reasonable width of coal pillar is 5.4-9.9 m by the internal and external stress field theory, limit equilibrium theory and the support conditions of coal pillar side in gob side entry. The reasonable width of coal pillar is determined to be 6 m by the distribution law of horizontal zero displacement surface and vertical stress peak value with the numerical simulation, and the targeted surrounding rock control technology is proposed. The practice shows that the displacement of roof and floor, the deformation of coal rib and coal pillar are small, and the surrounding rock control effect is well.

关 键 词：特厚煤层 煤柱 沿空煤巷 零位移面 围岩控制 

分 类 号：TD322[矿业工程—矿井建设]