中硬煤层井下长距离密闭取心瓦斯含量测定技术应用研究  

Application of Gas Content Measurement Technology for Long-distance Sealed Coring in Medium Hard Coal Seam

作　　者：芦伟 龙威成 康锴 霍福星 吴敏杰 LU Wei;LONG Wei-cheng;KANG Kai;HUO Fu-xing;WU Min-jie(Jinneng Holding Group Corporation Limited,Datong 048000,China;China Coal Technology and Engineering Group Xi′an Research Institute Co.,Ltd.,Xi′an 710077,China)

机构地区：[1]晋能控股集团有限公司,山西大同048000 [2]中煤科工集团西安研究院有限公司,西安710077

出　　处：《煤炭技术》2021年第12期153-156,共4页Coal Technology

基　　金：天地科技股份有限公司科技创新创业资金专项(2020-TD-MS010)。

摘　　要：针对寺河煤矿中硬煤层井下常规取心瓦斯含量测定工作存在的瓦斯探测距离短、取心煤样暴露时间长而瓦斯损失量大、测点轨迹偏差大等问题,在分析井下煤层密闭取心装置和矿井主采煤层为中硬、高瓦斯、厚煤层等实际地质条件的基础下,提出了煤矿井下中硬煤层顺层长距离密闭取心瓦斯含量测定技术工艺,并选择某工作面煤巷条带进行瓦斯预抽后剩余瓦斯含量测定试验。研究表明,煤矿井下中硬煤层顺层长钻孔密闭取心瓦斯含量测定技术能够满足寺河煤矿井下长距离探测煤层瓦斯的要求,该技术实现了顺煤层钻孔精准定点、长距离、密闭取心,为煤层区域瓦斯预抽效果考察提供了精确数据支撑的同时,避免了瓦斯抽采效果考察与工作面掘进工作的交叉,为矿井安全高效生产提供保障。In view of the problems of short gas detection distance,long exposure time of coring coal sample and large loss,and large deviation of measuring point trajectory existing in conventional coring gas content determination of coal seam in Sihe coal mine,puts forward that the coal seam with medium hard seam is long along the seam under the condition of analyzing the sealed coring device of coal seam and the actual geological conditions such as medium hard,high watts and thick coal seam the technology of gas content determination in borehole sealed coring is introduced,and the remaining gas content determination test after gas pre drainage is carried out in a coal roadway of a working face.The research shows that the gas content measurement technology of long borehole closed coring in medium hard coal seam underground can meet the requirements of long distance detection of coal seam gas in Sihe coal mine.The technology realizes accurate fixed-point,long-distance and closed coring in long borehole along coal seam,provides accurate data support for the investigation of gas pre drainage effect in coal seam area,and avoids the gas drainage effect investigation make the intersection with the working face excavation,provide the guarantee for the safe and efficient production of the mine.

关 键 词：密闭取心 瓦斯含量 中硬煤层 寺河煤矿 

分 类 号：TD712[矿业工程—矿井通风与安全]