基于瓦斯地质单元划分的矿井瓦斯精准抽采技术  

Precise mine gas extraction based on gas geological unit division

作　　者：张巨峰 施式亮 谢亚东 马德奇 苗在全 张建江 ZHANG Ju-feng;SHI Shi-liang;XIE Ya-dong;MA De-qi;MIAO Zai-quan;ZHANG Jian-jiang(College of Energy Engineering,Longdong University,Qingyang 745000,China;College of Resources,Environment and Safety Engineering,Hunan University of science and technology,Xiangtan 411201,China;Weijiadi Coal Mine,Jingyuan Coal Power Co.,Ltd.,Baiyin 730913,China)

机构地区：[1]陇东学院能源工程学院,甘肃庆阳745000 [2]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [3]靖远煤电股份有限公司魏家地煤矿,甘肃白银730913

出　　处：《煤炭工程》2021年第7期75-80,共6页Coal Engineering

基　　金：国家自然科学基金项目(51974120,51774135,51704110);甘肃省青年科技计划项目(18JR3RM240);甘肃省高等学校创新能力提升项目(2019B-154);甘肃省安全生产科技项目(GAJ00011);中国煤炭工业协会科学技术研究指导性计划项目(MTKJ2018-279);陇东学院青年科技创新项目(XYZK1610)。

摘　　要：为了实现瓦斯精准抽采,提高矿井瓦斯的抽采效率,对甘肃靖远矿区魏家地煤矿井田瓦斯地质单元进行划分,根据不同瓦斯地质单元建立了回采工作面梯级抽采的三个梯级,不同梯级含量的区域对应实施顺层钻孔瓦斯抽采、上隅角埋管抽采、上出口中位钻孔瓦斯抽采、顶板岩石走向高位钻孔和地面钻井瓦斯抽采等不同的瓦斯抽采技术措施,构建了矿井瓦斯精准抽采模式,并在东102综放工作面进行了试验实践。结果表明,采煤工作面通过实施工作面瓦斯梯级治理、精准抽采模式,煤体残余瓦斯含量降至6m^(3)/t以下;回采期间,工作面回风流瓦斯浓度控制在0.2%~0.3%,同时也避免了现场瓦斯抽采措施实施的随意性和盲目性。In order to accurately extract mine gas and improve the extraction efficiency,the gas geological units of Weijiadi Coal Mine in Jingyuan mining area of Gansu Province is divided.The three grades of grading-extraction in the working face is established according to different gas geological units,which correspond to the gas extraction measures of bedding drilling,buried pipe drainage at the upper corner,upper outlet meso-position drilling,high-level drilling along roof rock strike and surface drilling,and the mine gas precise drainage mode is constructed and tested in the East-102 fully mechanized top-coal caving face.The residual gas content in coal body was below 6 m^(3)/t;during the mining period,the gas concentration in the return air flow of the working face was kept within 0.2%~0.3%;and the randomness and blindness of gas extraction measure selection on site were avoided.

关 键 词：瓦斯地质单元 精准抽采 瓦斯赋存 瓦斯梯级治理 

分 类 号：TD712.6[矿业工程—矿井通风与安全]