摘要
针对深部低透突出煤层群下保护层开采后上覆被保护层卸压瓦斯及下保护层瓦斯协同抽采的难题,新景矿采用“地面井预抽+高(低)位抽采巷”实现了被保护层卸压瓦斯及上隅角瓦斯的协同抽采。综合应用机械造穴、地面井压裂等增透措施,提高了新景矿15号煤层抽采效率。增透前后支管抽采瓦斯纯流量提高了2.27倍,缩短了保护层工作面预抽瓦斯的达标时间;通过对比15号煤层开采前后3号、8号及9号被保护层的卸压瓦斯地面井抽采瓦斯纯流量提高了1.85倍,实现了保护层与被保护层瓦斯的协同抽采,开采突出煤层群做到安全可控,对阳泉矿区煤层群安全高效开采具有重要的参考意义。
In response to the problem of collaborative extraction of gas from the pressure relief of the overlying protected layer and the lower protective layer after the mining of the protective layer under the deep low-permeability and outburst coal seam group,Xinjing Mine has adopted“surface well pre-extraction+high(low)level extraction roadway”to achieve collaborative extraction of gas from the pressure relief of the protected layer and the upper corner gas.The composite utilization of antireflection measures such as mechanical drilling and surface well fracturing has improved the extraction efficiency of the No.15 coal seam in Xinjing Mine.The net gas flow extracted from the gas branch pipe is increased by 2.27 times after anti-reflection,shortening the standard time for pre-extraction of gas from the protective layer working face.The net gas flow of the pressure relief surface well of the protected layers of No.3,No.8 and No.9 after the mining of No.15 coal seam is increased by 1.85 times,and the collaborative gas extraction of the protected layer and the protective layer is realized.It is of great reference significance for safe and efficient mining of coal seam groups in Yangquan mining area to achieve safe and controllable mining of outburst coal seam groups.
作者
张兆一
ZHANG Zhaoyi(State Key Laboratory of Coal Mine Disaster Prevention and Control,Chongqing 400037,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)
出处
《矿业安全与环保》
CAS
北大核心
2024年第4期74-79,共6页
Mining Safety & Environmental Protection
基金
天地科技股份有限公司科技创新创业资金专项项目(2022-2-TD-ZD008)。
关键词
突出煤层群
大区域瓦斯治理
协同抽采
增透技术
保护层开采
outburst coal seam group
large area gas control
collaborative extraction
antireflection technology
protective layer mining
