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1、第27卷第1期采矿与安全工程学报Vol.27No.12010年03月JournalofMining&SafetyEngineeringMarch2010文章编号:167323363(2010)0120008205长综放面采动上覆煤层的瓦斯卸压规律研究吴仁伦,许家林,孔翔,石成涛,罗宝林,呼亚民,李月奎(中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏徐州221008)##摘要:针对阳泉三矿15煤长综放面开采对上覆138.5m处3煤瓦斯卸压的影响,采用数值模##拟和工程实测相结合的方法进行研究.结果表明:15煤采面长为252m的
2、综放面开采能使3##煤充分卸压.沿工作面推进方向,3煤充分卸压边界滞后15煤工作面35m,对应的走向充分卸压角为75.8°;沿工作面倾向方向,从工作面上端内侧12m到其下端内侧29.2m之间范围内的##3煤得到充分卸压,对应的倾向上部和下部充分卸压角分别为85°和78.1°.3煤充分卸压区域内的瓦斯抽采率达到88.43%,且开采期间未发生过煤与瓦斯突出,表明15#煤的开采能够有效#地消除或降低3煤开采期间煤与瓦斯突出和瓦斯超限的威胁,实现了煤与瓦斯安全高效共采.关键词:采矿工程;长综放面;关键层;卸压瓦斯;煤与瓦斯共采中图分类号:TD712文
3、献标识码:AGasPressureReliefRuleofOverlyingCoalSeamInducedbyFullyMechanizedTopCoalCavinginLongWorkingFaceWURen2lun,XUJia2lin,KONGXiang,SHICheng2tao,LUOBao2lin,HUYa2min,LIYue2kui(StateKeyLaboratoryofCoalResourcesandSafeMining,SchoolofMines,ChinaUniversityofMining&Technology,Xuzho
4、u,Jiangsu221008,China)#Abstract:Westudytheeffectofsuper2lengthfullymechanizedtopcoalcavingfaceof15coal##seamongaspressurereliefof3coalseamwhichis138.5mabove15coalseaminNO.3mineofYangquanbymeansofnumericalsimulationandfieldmeasurement.Theresultsindi2#catethatthefullpressurer
5、elieftakesplacein3coalseamontheconditionofmining252m2#longfullymechanizedtopcoalcavingfaceof15coalseam.Intheadvancingdirectionofwork2#ingface,thefullpressurereliefboundaryof3coalseamis35mbehindtheworkingfaceof#15coalseam,andthefullpressurereliefangleofcorrespondingadvancing
6、directionis75.8°;#Thepressureof3coalseamintherangebetween12mfromtheupperendinsidetheworkingfaceand29.2mfromthelowerendisfullyrelievedintheinclineddirectionofworkingface,andthefullpressurereliefanglesofbothupperandlowerendsinthecorrespondinginclineddi2#rectionare85°and78.1°,
7、respectively.Thegasextractionrateoffullpressurereliefareain3coalseamisupto88.43%,withoutanycoalandgasoutbursthappenedduringmining.The#studyresultsindicatethattheminingof15coalseamcanefficientlyeliminateordecreasethethreatofcoalandgasoutburstandgasoverrunning,andthesafe2and2
8、high2efficientco2extrac2tionofcoalandgasisrealized.Keywords:miningengineering;long
