小煤柱沿空掘进瓦斯综合防治技术研究
Research on Comprehensive Gas Prevention and Control Technology of Gob-side Entry Driving in Small Coal Pillar
胡乐天1
作者信息
- 1. 山西保利平山煤业股份有限公司,山西沁水 048200
- 折叠
摘要
以某矿 31018 回风顺槽小煤柱沿空掘进为工程背景,对采空区侧煤体卸压范围考察,确定采空区侧煤体卸压范围,并在卸压范围进行残余瓦斯含量测试,划定无突出危险性范围;采用对小煤柱进行注浆加固和巷道全断面喷浆措施防止采空区瓦斯溢出;使用钻屑指标法对掘进工作面进行预测和验证.统计表明:31018回风顺槽小煤柱沿空掘巷过程中,预测指标K1max=0.24,Smax=3.4,平均进尺 5.8 m/d,回风流平均瓦斯浓度为 0.15%,单日绝对瓦斯涌出量平均为 1.04 m3/min,实现了巷道安全掘进.
Abstract
Based on the goaf driving of small coal pillar in the 31018 return air groove of a mine,the pressure relief range of coal body at the side of the goaf is investigated to determine the pressure relief range of coal body at the side of the goaf,and the residual gas content is tested in the pressure relief range to delimit the range without the risk of protruding.The small coal pillar is reinforced by grouting and the whole section of roadway is shotcrete to prevent the goaf gas overflow.The cuttings index method is used to predict and verify the heading face.Statistics show that:In the process of 31018,the prediction index K1max=0.24,Smax=3.4,the average intake is 5.8 m/d,the average gas concentration of the return air flow is 0.15%,the average daily absolute gas emission is 1.04 m3/min,which realizes the safe tunneling of roadway.
关键词
沿空掘进/瓦斯治理/小煤柱/卸压范围/注浆加固Key words
gob-side entry driving/gas prevention and control/small coal pillar/the released range/grouting reinforcement引用本文复制引用
出版年
2025
NETL
NSTL
万方数据