低透气性煤层群高瓦斯采煤工作面强化抽采卸压瓦斯机理.pdf

第35卷第4期煤炭学报Vo.l35No.4
2010年4月JOURNALOFCHINACOALSOCIETYApr.2010

文章编号:0253-9993(2010)04-0580-06
低透气性煤层群高瓦斯采煤工作面强化抽采
卸压瓦斯机理及试验

121232221
卢平,袁亮,程桦,薛俊华,刘泽功,童云飞,王永,蔡如法,邓中

(1安徽建筑工业学院土木工程学院,安徽合肥230022;2淮南矿业集团公司,安徽淮南232001;3安徽理工大学能源与安全工程学院,安
徽淮南232001)

摘要:针对低透气性高瓦斯煤层群首采卸压层瓦斯涌出量大、瓦斯治理困难的现实条件,在模型
试验和理论研究的基础上,揭示出煤层群首采关键卸压层开采后采动影响区内顶、底板岩层裂隙的
动态演化规律和卸压瓦斯运移规律,发现采空区侧存在竖向裂隙发育区,弯曲下沉带和底板膨
胀变形带内煤体发生膨胀变形,煤层的透气性显著增加。2371(1)工作面煤气共采实践表明,工作
面最大绝对瓦斯涌出量7046m3/min,平均5671m3/min,瓦斯抽采率达852%,其中抽采的高浓
度瓦斯比例为6725%,抽采的低浓度瓦斯比例为3275%,保证工作面的安全回采,实现了煤与瓦
斯安全高效开采。
关键词:低透气性;煤层群;高瓦斯;强化抽采;卸压瓦斯
中图分类号:TD7126文献标志码:A
Theoryandexperimentalstudiesofenhancedgasdrainageinthehigh
gasfaceoflowpermeabilitycoalmultiseams

12123
LUPing,YUANLiang,CHENGHua,XUEJunhua,LIUZegong,
TONGYunfei2,WANGYong2,CAIRufa2,DENGZhong1

(1SchoolofCivilEngineering,AnhuiUniversityofArchitecture,Hefei230022,China;2HuainanMiningGroupCo,Huainan232001,China;3Institute
ofEnergyandSafetyEngineering,AnhuiUniversityofScienceandTechnology,Huainan232001,China)

Abstract:Onthebasisofmodeltestandtheoryresearchfortheproblemofhighgasemissionwhenminingthekey
coalseaminthemultiseamscoalofthehighlygascontentandlowpermeabilityandthedifficultactualconditionof
gascontro,lthepermeabilityofthecoalseamsignificantlyincreasesbecauseoftheexistenceoftheverticalcrevasse
growthareabesidethemineddirection,thecurvingsubmergedbeltandthebulgydeformationbandinthemother
boardincoa,lwhichisverybenefitforgasdrainage.Theresearchprovidestheoryfordisposingminingholesduringthe
processofstressreliefandgasmininginthekeyminingstressrelieflayerofcoalmultiseams.Thekeyremotemining
ofPanyiCoalMine2371(1)workfacegasminingontheworkingsurfacerevealsthatthemostgreatlyabsolutegase
missionquantityis7046m3/min,average5671m3/min.Thegasdrainagerateamountsto852%.Besides,high
concentrationgasdrainagerateupto6725%andlowconcentrationgasjustonly3275%.Theexperimentresult
showsthattheutilizationofcoalandgasminingtogethernotonlycontrolsworkf