煤矿安全2019，Vol.50Issue(10)：193-197,5.DOI:10.13347/j.cnki.mkaq.2019.10.045
高瓦斯矿井孤岛工作面沿空掘巷煤柱宽度研究
Width of Coal Pillar of Gob-side Entry Driving in Island Working Face of High Gas Mine
杨小军 1李世和 1陈建伟1
作者信息
- 1. 山西阳煤寺家庄煤业有限责任公司,山西 晋中 032600
- 折叠
摘要
Abstract
The methods of numerical simulation and field monitoring are used to analyze the width of coal pillar of gob-side entry driving in island working face of high gas well. The vertical stress in the side coal pillar in the goaf area of the roadway is distributed in a parabolic shape along the width of the roadway. The maximum vertical stress is located in 1/2 of the width of the roadway, and the stress and deformation of the coal pillar in the middle of the roadway are significantly greater than those in the upper and lower parts of the roadway. When the width of coal pillar on the side of goaf is 6 to 7 m, the coal pillar has a high bearing capacity and can effectively control the deformation of roadway surrounding rock. It is safer to use cuttings gas desorption index to evaluate gas outburst risk than cuttings quantity index. By using local gas outburst risk assessment and monitoring of gas content in the roadway, the safety construction of tunneling along gob in isolated working face of high gas mine can be effectively guaranteed.关键词
孤岛工作面/高瓦斯矿井/煤柱宽度/数值模拟/现场监测Key words
island working face/high gas mine/coal pillar width/numerical simulation/filed monitoring分类
矿业与冶金引用本文复制引用
杨小军,李世和,陈建伟..高瓦斯矿井孤岛工作面沿空掘巷煤柱宽度研究[J].煤矿安全,2019,50(10):193-197,5.
