浅埋煤层大巷保安煤柱尺寸优化研究  

Study on Optimization of Security Coal Pillar Size in Shallow Buried Coal Seam Roadway

作　　者：肖江[1] 李德桃 张成 陈航挺 孙亚超 王怡辉 XIAO Jiang;LI Detao;ZHANG Cheng;CHEN Hangting;SUN Yachao;WANG Yihui(College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]西安科技大学能源学院,西安710054

出　　处：《煤炭技术》2023年第8期79-83,共5页Coal Technology

摘　　要：以赵家梁煤矿3-1煤层大巷保安煤柱为研究背景,通过数值模拟和理论计算的研究方法,对浅埋煤层大巷保安煤柱尺寸优化进行研究。结果表明:随着大巷煤柱宽度的减小,1^(#)、2^(#)大巷保安煤柱两侧塑性区宽度均呈现增大趋势。当1^(#)大巷煤柱宽度为32 m,2^(#)大巷煤柱宽度为30 m时,弹性核区消失,塑性区贯通且中部垂直应力变化幅度明显加快。因此,1^(#)大巷煤柱宽度应不小于32 m,2^(#)大巷煤柱宽度应不小于30 m。理论计算与数值模拟结果基本相符。Taking the security pillar of 3-1 coal seam roadway in Zhaojialiang coal mine as the research background,through the research methods of numerical simulation and theoretical calculation,the size optimization of security coal pillar in shallow coal seam roadway was studied.The results show that with the decrease of coal pillar width in roadway,the width of plastic zone on both sides of security coal pillar in No.1 and No.2 roadway shows an increasing trend.When the width of coal pillar in No.1 roadway is 32 m and that in No.2 roadway is 30 m,the elastic core zone disappears,the plastic zone runs through,and the vertical stress change in the middle part is obviously accelerated.Therefore,the width of coal pillar in No.1 roadway should be no less than 32 m,and that in No.2 roadway should be no less than 30 m.The theoretical calculation is basically consistent with the numerical simulation results.

关 键 词：浅埋煤层 大巷保安煤柱 数值模拟 理论分析 煤柱优化 

分 类 号：TD823[矿业工程—煤矿开采]