摘要
为降低工作面掘进及回采期间巷道支护难度,减少巷道后期维护成本,提高工作面回采安全性,同时为了提高矿井煤炭资源回收率,结合隆安煤矿四采区11^(#)煤层地质情况,通过数值模拟分析和煤柱尺寸宽度理论计算相结合的方法,确定了11^(#)煤层开采留设煤柱的合理宽度为20 m。现场应用结果表明,工作面在开采过程中,巷道围岩受采动影响产生的变形量在可控范围之内,留设煤柱也处于较为稳定状态,达到了设计要求。
In order to reduce the difficulty of roadway support during the excavation and stoping of the working face,reduce the final maintenance cost of the roadway,improve the safety mining of the working face,and at the same time improve the coal resource recovery rate of the mine,combined with the geological conditions of the 11^(#)coal seam in the fourth mining area of Long'an Colliery,it is determined that the reasonable width of the setting coal pillar for No.11 coal seam mining is 20 m based on numerical simulation analysis and theoretical calculation of coal pillar size and width.Field application results show that during the mining process of the working face,the deformation of the roadway surrounding rock affected by mining is within a controllable range,and the setting coal pillars are also in a relatively stable state,which meets the design requirements.
作者
闫东
Yan Dong(Taishan Longan Coal Industry Co.,Ltd.,Shanxi Coal Transportation and Marketing Group,Xinzhou,Shanxi 034000)
出处
《江西煤炭科技》
2021年第2期105-107,110,共4页
Jiangxi Coal Science & Technology
关键词
邻近煤层开采
煤柱
数值模拟
应力分布
围岩变形
adjacent seam mining
coal pillar
numerical simulation
stress distribution
surrounding rock deformation
