上保护层开采下定向长钻孔抽采瓦斯技术研究
Research on Directional Long Borehole Gas Drainage Technology Under Upper Protective Layer Mining
马晓红 1余伟伟2
作者信息
- 1. 平顶山天安煤业股份有限公司十二矿,河南 平顶山 467000
- 2. 中煤科工集团沈阳研究院有限公司,辽宁 抚顺 113122;煤矿灾害防控全国重点实验室,辽宁 抚顺 113122
- 折叠
摘要
平煤十二矿己 14-31110 工作面上保护层开采期间,存在下邻近层瓦斯涌出量大的问题.为解决治理瓦斯时工程量大、利用率低的问题,在己 14-31110 工作面提出了适用于上保护层开采条件下"以孔代巷"的瓦斯抽采技术.通过现场试验,确定了定向钻孔布置方式、下筛管方法和封孔工艺等关键技术参数,形成了上保护层开采条件下"以孔代巷"瓦斯抽采技术体系,有效解决了下覆己 15 和己 16-17 煤层瓦斯涌入问题.结果表明:"以孔代巷"的瓦斯抽采技术有力解决了上保护层开采条件下的瓦斯难题,确保了工作面安全高效回采.
Abstract
During the mining period of the upper protective layer in the Ji14-31110 working face of Pingmei No.12 Mine,there is a problem of large gas emission amount in the lower adjacent layer.In order to solve the problems of large engineering volume and low utilization rate in gas governance,a gas drainage technology called"replacing roadway with hole"suitable for the upper protective layer mining condition is proposed in the Ji14-31110 working face.Through on-site experiments,key technical parameters such as directional borehole layout mode,lower screening tube method,hole sealing technique and so on are determined,forming a gas drainage technology system of"replacing roadway with hole"under the mining condition of upper protective layer,effectively solving the problem of gas emission in the underlying Ji15 coal seam and the Ji16-17 coal seam.The results show that the gas drainage technology of"replacing roadway with hole"effectively solves the gas difficult problem under the mining condition of the upper protective layer,ensuring safe and efficient stoping of the working face.
关键词
上保护层/定向钻孔/以孔代巷/瓦斯抽采Key words
upper protective layer/directional borehole/replace roadway with hole/gas drainage引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据