厚煤层大巷保护煤柱合理尺寸优化
Optimization of Reasonable Size of Coal Pillar Protection in Thick Coal Seam Roadway
罗波远 1张涛 1安彦成 1姚新宇 1刘志刚 1李树文2
作者信息
- 1. 昊华红庆梁矿业有限公司,内蒙古鄂尔多斯 017000
- 2. 安徽理工大学土木建筑学院,安徽淮南 232001
- 折叠
摘要
针对红庆梁煤矿12308 回采工作面大巷保护煤柱宽度留设过大导致煤炭资源浪费的问题,通过数值仿真分析工作面前方区段煤柱的应力分布规律,得到大巷保护煤柱合理宽度为 100～150 m,通过12308 回风顺槽顶板锚索支护压力监测,得到大巷保护煤柱宽度不得小于 121 m,通过极限强度理论分析煤柱的稳定性,最终将 12308 回采工作面大巷保护煤柱的宽度从 200 m减小到125 m.通过对停采后北翼回风大巷钻孔应力进行监测,进一步验证了 125 m宽大巷保护煤柱留设的安全性与合理性,大大减少了煤炭资源的浪费.
Abstract
In response to the problem of excessive width of the protective coal pillar in the main roadway of the 12308 mining face of Hongqingliang coal mine,which leads to the waste of coal resources,the stress distribution law of the coal pillar in the front section of the working face was analyzed through numerical simulation.The reasonable width of the protective coal pillar in the main roadway was obtained to be between 100 and 150 m.Through pressure monitoring of the anchor support on the roof of the 12308 return air passage,it was found that the width of the protective coal pillar in the main roadway should not be less than 121 m,by analyzing the stability of coal pillars through ultimate strength theory,the width of the protective coal pillars in the main roadway of the 12308 mining face was ultimately reduced from 200 m to 125 m.By monitoring the stress in the boreholes of the north wing return air roadway after mining was stopped,the safety and rationality of the 125 m wide roadway protective coal pillar were further verified,greatly reducing the waste of coal resources.
关键词
保护煤柱/数值仿真/矿山压力Key words
coal pillars protection/numerical simulation/mining pressure引用本文复制引用
出版年
2025
NETL
NSTL
万方数据