高瓦斯煤层群_煤与瓦斯共采_技术研究_谢生荣.pdf

第26卷第2期采矿与安全工程学报Vol.26No.2

2009年06月JournalofMining&SafetyEngineeringJune2009

文章编号:1673-3363(2009)02-0173-06

高瓦斯煤层群煤与瓦斯共采技术研究

谢生荣1,武华太2,赵耀江3,4,何富连4,郭海东3,袁胜军3
(1.北京科技大学土木与环境工程学院,北京100083;2.华晋焦煤有限责任公司,山西离石033315;
3.太原理工大学矿业工程学院,山西太原030024;4.中国矿业大学资源与安全工程学院,北京100083)

摘要:为了解决沙曲矿近距离高瓦斯煤层群开采过程中综采面上隅角和回风流中浓度超限这一
难题,结合从德国引进的千米定向钻机设备,提出了高抽钻孔组和顶板裂隙钻孔组联合抽采瓦斯
技术,构建了沙曲矿煤与瓦斯共采技术体系.本文在顶板千米钻孔抽采技术原理分析的基础
上,采用UDEC4.0数值模拟软件计算得出采空区冒落带和裂隙带高度为9m和30m,采动裂
隙O形圈的范围为距工作面顶板垂高10~25m,距采空区两侧水平距离为10~35m.研究表
明,顶板千米大直径钻孔抽采技术治理瓦斯效果明显,上隅角瓦斯体积分数稳定在0.8%以下,
且钻孔抽采瓦斯体积分数达55%以上,抽采量达50m3/min以上,实现煤与瓦斯安全高效共采.
关键词:高瓦斯;近距离煤层群;千米大直径钻孔;O形圈;煤与瓦斯共采
中图分类号:TD712.6文献标识码:A

TechnologyofCoalandGasSimultaneousExtraction
forHighGassyCoalSeamsGroup

XIESheng-rong1,WUHua-tai2,ZHAOYao-Jiang3,4,HEFu-lian4,GUOHa-idong3,YUANSheng-jun3
(1.CollegeofCivilandEnvironmentalEngineering,UniversityofScienceandTechnologyBeijing,Beijing100083,
China;2.HuajinCokingCoalCo.Ltd.,Lishi,Shanxi033315,China;3.CollegeofMiningTechnology,
TaiyuanUniversityofTechnology,Taiyuan,Shanxi030024,China;4.CollegeofResources&Safety
Engineering,ChinaUniversityofMining&Technology,Beijing100083,China)

Abstract:Thegasconcentrationinuppercornersandairreturnwaysinfullymechanizedface
alwaysexceedslimitduringminingactivetiesinnearthehighgascoalseamgroupinShaqucoal
mine.Inordertosolvetheproblem,weproposedthecombinedtechniqueofroofborehole
groupwithfractureboreholegroupusing1000mlongorienteddrillequipmentimportedfrom
Germanyandbuiltthetechnicalsystemofsimultaneousextractionofcoalandgas.Basedon
thetheoreticalanalysisfor1000mlongdrainageskills,theUDEC4.0numericalsimulation
softwareisadoptedtoperformthecalculation,showingthattheheightofcavingzoneandfrac-
turedzoneofgobis9mand30m,theverticalheightfromthemininginducedO-shapedcircle
totheroofis10~25m,andthehorizontaldistancetobothsidesofgobis10~35m.The
studyindicatesthatthegascontrollingby1000m-longboreholewithlargediameterhasanob-
viouseffect,makingthegasconcentrationintheuppercornerlassthan0.8%,thec