陕西煤炭2024，Vol.43Issue(8)：8-13,6.DOI:10.20120/j.cnki.issn.1671-749x.2024.0802
浅埋煤层双回撤通道保护煤柱合理宽度确定
Reasonable width of protective coal pillars for double withdrawal channels in shallow buried coal seam
刘晓勤 1任钦华 1周虎 1安升 1种德雨1
作者信息
- 1. 陕西能源凉水井矿业有限责任公司,陕西榆林 719300
- 折叠
摘要
Abstract
The width of protective coal pillar is important for the stability of surrounding rock of withdrawal channels and boosting the efficiency of working face moving.In order to solve the problem of the width of coal pillars in the double with-drawal channel,taking the pre-excavation double withdrawal channel on the 42206 working face of Liangshuizhui Coal Mine as the background,the deformation mechanism of the withdrawal channel and the advanced influential range of the coal pil-lars on the working face were studied and analyzed through theoretical analysis and numerical simulation.Finally,a reasona-ble coal pillar size between the channels was determined.The results show that the theoretical calculation shows that the width of the protective coal pillar in the withdrawal channel is 15.8 m.Numerical simulation shows that the width of the pro-tective coal pillar in the withdrawal channel is 14 m,and the stress difference between it and that at 20 m is only 0.11 MPa,and the pillar is stable with the width of above 14 m.Compared with 20 m,the difference in the subsidence of the roof is on-ly 1 cm.After comprehensive consideration,the finally optimized size of the coal pillar should be 15 m.关键词
浅埋煤层/双回撤通道/煤柱宽度/塑性区/顶板下沉量Key words
shallow buried coal seam/double withdrawal channel/coal pillar width/plastic zone/roof subsidence分类
矿业与冶金引用本文复制引用
刘晓勤,任钦华,周虎,安升,种德雨..浅埋煤层双回撤通道保护煤柱合理宽度确定[J].陕西煤炭,2024,43(8):8-13,6.
