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1、第27卷第1期采礦與安全工程學(xué)報(bào)Vol.27No.12010年03月JournalofMining&SafetyEngineeringMarch2010文章編號(hào):167323363(2010)0120008205長(zhǎng)綜放面采動(dòng)上覆煤層的瓦斯卸壓規(guī)律研究吳仁倫,許家林,孔翔,石成濤,羅寶林,呼亞民,李月奎(中國(guó)礦業(yè)大學(xué)煤炭資源與安全開采國(guó)家重點(diǎn)實(shí)驗(yàn)室,礦業(yè)工程學(xué)院,江蘇徐州221008)##摘要:針對(duì)陽(yáng)泉三礦15煤長(zhǎng)綜放面開采對(duì)上覆138.5m處3煤瓦斯卸壓的影響,采用數(shù)值模##擬和工程實(shí)測(cè)相結(jié)合的方法進(jìn)行研究.結(jié)果表明:15煤采面長(zhǎng)為252m的
2、綜放面開采能使3##煤充分卸壓.沿工作面推進(jìn)方向,3煤充分卸壓邊界滯后15煤工作面35m,對(duì)應(yīng)的走向充分卸壓角為75.8°;沿工作面傾向方向,從工作面上端內(nèi)側(cè)12m到其下端內(nèi)側(cè)29.2m之間范圍內(nèi)的##3煤得到充分卸壓,對(duì)應(yīng)的傾向上部和下部充分卸壓角分別為85°和78.1°.3煤充分卸壓區(qū)域內(nèi)的瓦斯抽采率達(dá)到88.43%,且開采期間未發(fā)生過(guò)煤與瓦斯突出,表明15#煤的開采能夠有效#地消除或降低3煤開采期間煤與瓦斯突出和瓦斯超限的威脅,實(shí)現(xiàn)了煤與瓦斯安全高效共采.關(guān)鍵詞:采礦工程;長(zhǎng)綜放面;關(guān)鍵層;卸壓瓦斯;煤與瓦斯共采中圖分類號(hào):TD712文
3、獻(xiàn)標(biāo)識(shí)碼: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
