长综放面采动上覆煤层的瓦斯卸压规律研究.pdf

第27卷第1期采矿与安全工程学报Vol.27No.1

2010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文献标识码:A

GasPressureReliefRuleofOverlyingCoalSeamInduced
byFullyMechanizedTopCoalCavinginLongWorkingFace

WURen2lun,XUJia2lin,KONGXiang,SHICheng2tao,LUOBao2lin,HUYa2min,LIYue2kui
(StateKeyLaboratoryofCoalResourcesandSafeMining,SchoolofMines,
ChinaUniversityofMining&Technology,Xuzhou,Jiangsu221008,China)

Abstract:Westudytheeffectofsuper2lengthfullymechanizedtopcoalcavingfaceof15#coal
seamongaspressurereliefof3#coalseamwhichis138.5mabove15#coalseaminNO.3
mineofYangquanbymeansofnumericalsimulationandfieldmeasurement.Theresultsindi2
catethatthefullpressurerelieftakesplacein3#coalseamontheconditionofmining252m2
longfullymechanizedtopcoalcavingfaceof15#coalseam.Intheadvancingdirectionofwork2
ingface,thefullpressurereliefboundaryof3#coalseamis35mbehindtheworkingfaceof
15#coalseam,andthefullpressurereliefangleofcorrespondingadvancingdirectionis75.8°;
Thepressureof3#coalseamintherangebetween12mfromtheupperendinsidetheworking
faceand29.2mfromthelowerendisfullyrelievedintheinclineddirectionofworkingface,
andthefullpressurereliefanglesofbothupperandlowerendsinthecorrespondinginclineddi2
rectionare85°and78.1°,respectively.Thegasextractionrateoffullpressurereliefareain3#
coalseamisupto88.43%,withoutanycoalandgasoutbursthappenedduringmining.The
studyresultsindicatethattheminingof15#coalseamcanefficientlyeliminateordecreasethe
threatofcoalandgasoutburstandgasoverrunning,andthesafe2and2high2efficientco2extrac2
tionofcoalandgas