钻屑指标在确定本煤层钻孔瓦斯抽采合理封孔深度中的应用  

Reasonable Sealing Depth of Gas Drainage Hole Determined with Drilling Cutting Index

作　　者：娄振[1] 魏国营[1,2,3] LOU Zhen;WEI Guo-ying(Safety Science & Engineering School, Henan Polytechnic University, Jiaozuo 454003, China;Henan Province Gas Geological and Control Key Laboratory- Provincial Joint Construction State Key Laboratory Cultivation Base, Jiaozuo 454003, China;Henan Province Coal Safety Production Collaborative Innovation Center, Jiaozuo 454003, China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454003 [3]煤炭安全生产河南省协同创新中心,河南焦作454003

出　　处：《煤矿开采》2016年第6期104-107,87,共5页Coal Mining Technology

基　　金：教育部长江学者和创新团队发展计划资助(IRT1235);河南省产学研合作项目(162107000040)

摘　　要：为了提高本煤层钻孔瓦斯抽采效率,基于合理封孔深度对瓦斯抽采的重要性,以冯营矿二1煤层为例,探讨了钻屑指标的影响参数,从煤层巷道"三带"角度分析了合理封孔深度的范围。基于钻屑指标与地应力间的关系,通过数据分析确定出冯营矿合理封孔深度为16m,并在现场布置封孔深度分别为12m,16m,18m,22m的钻孔进行抽采效果考察,结果表明:16m,18m,22m封孔深度的钻孔抽采浓度明显高于封孔深度为12m的钻孔抽采浓度,16m封孔深度最为合理。该方法既可以保证瓦斯高效抽采,又可为其他矿井运用该指标确定本煤层合理封孔深度提供借鉴和参考。In order to improve drilling hole gas drainage efficiency of the coal seam, based on the importance of an reasonable sealingdepth of gas drainage hole, it taking two-one coal seam of Fengying coal mine as example, influencing parameters that influenced drillingcutting were discussed, the scope of reasonable sealing depth was analyzed from ‘three-zone’ of roadway in coal seam. Based onrelationship between drilling cutting index and ground stress, the reasonable depth was 16m was determined by data analysis of Fengyingcoal mine, the gas drainage effect was compared from different sealing depth in site, such as 12m, 16m, 18m, 22m. The resultsshowed that gas drainage results was better with sealing depth 16m, 18m, 22m than sealing depth 12m, sealing depth 16m was themost reasonable. The method not only assured gas drainage efficiency, but also references for reasonable sealing depth of this coalseam.

关 键 词：钻屑指标 本煤层 封孔深度 瓦斯抽采 

分 类 号：TD712[矿业工程—矿井通风与安全]