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1、安徽理工大學(xué)碩士學(xué)位論文下保護(hù)層開采覆巖結(jié)構(gòu)演化及卸壓瓦斯抽放技術(shù)研究姓名:魏磊申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):安全技術(shù)及工程指導(dǎo)教師:石必明20070609摘要根據(jù)保護(hù)層理論、瓦斯賦存與流動(dòng)理論,結(jié)合砌體梁、關(guān)鍵層理論以及煤與瓦斯突出理論等對(duì)下保護(hù)層開采覆巖結(jié)構(gòu)演化進(jìn)行力學(xué)性質(zhì)分析,同時(shí),運(yùn)用數(shù)值模擬和相似材料模擬技術(shù),對(duì)覆巖采動(dòng)結(jié)構(gòu)應(yīng)力和應(yīng)變進(jìn)行分析;對(duì)保護(hù)層開采卸壓瓦斯運(yùn)移規(guī)律進(jìn)行研究。結(jié)合淮南煤礦下保護(hù)層開采的具體實(shí)踐,建立瓦斯抽放系統(tǒng),優(yōu)化瓦斯抽放參數(shù),減少被保護(hù)層瓦斯含量,降低瓦斯壓力,提高瓦
2、斯抽放率,實(shí)現(xiàn)消除被保護(hù)層瓦斯突出的目的;現(xiàn)場(chǎng)實(shí)踐表明:通過(guò)保護(hù)層(BIO煤)開采,利用被保護(hù)層(Bllb煤)底板抽放巷道打上向式穿層網(wǎng)格式鉆孔,并開掘瓦斯專用抽放巷道對(duì)被保護(hù)層進(jìn)行卸壓瓦斯抽放,成功地消除了被保護(hù)層的煤與瓦斯突出危險(xiǎn),降低了煤層瓦斯含量,減少了工作面開采過(guò)程中瓦斯涌出,使B1lb煤層達(dá)到了綜采放頂煤開采技術(shù)條件,實(shí)現(xiàn)了該主采煤層安全快速掘進(jìn)和高效回采。將下保護(hù)層開采覆巖結(jié)構(gòu)演化與卸壓瓦斯抽放進(jìn)行綜合研究,為實(shí)現(xiàn)煤礦采抽一體化和綠色開采研究提供參考。關(guān)鍵詞;保護(hù)層開采、覆巖結(jié)構(gòu)、卸
3、壓瓦斯、透氣性系數(shù)、抽放AbstrctAbstractUndertheprotectivelayertheory,andtheoeeulTenceofMethaneflowtheoryandmasonrybeams,TheoryandthekeylayerofcoalandMethaneoutbursttheoryundertheprotectivelayerofoverburdenrockminingspatialstructureevolutionandmechanicalproperties
4、,Meanwhile,numericalsimulationandphysicalsimulationtechnologiesfortheresumptionofspacerockminingstructurenatureofthestressandstrainanalysis;theprotectivelayerofMethanemigrationrelievingmininglaws;Huainancoalminingundertheprotectivelayerofconcretepract
5、ice,theestablishmentofMethanedrainagesystems,optimizingMethanedrainageparameters,reducetheprotectivelayerofMethanecontent,reducedMethanepressureandimproveMethanedrainagerateeliminatingtheprotectionlayerMethaneoutburstpurposes;Experienceshowthat:exploi
6、tedbytheprotectivelayer(coalseamB10),PerforateandDepressurizingMethanedrainagefromtheflooroftheB1lbandexcavatingthetunneloftheMethanetodrainageMethaneissuccessful.IthascanceledtheblowoutdangerousofTheCoalandMethane,thecontentofMethanehasreduced,andred
7、ucedtheMethanepourformtheworkfaceSOthattheseamofBllbcouldbeexploitedbymachine,itRealizedfaststopingandtunnelingbysafetyandhi曲lyItwillbeundertheprotectivelayerofoverburdenreckminingspacestructureandevolutionofMethanedrainagerelievingcomprehensivestudy,
8、ToachieveprotectionlayerminingpumpingreferenceIntegrationandgoodforgreenexploting.Keywords:protectivelayerminingoverburdenspatialstructure,relievingMethanepermeabilitycoefficient,Drainage獨(dú)創(chuàng)性聲明本人聲明所呈交的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。據(jù)我所知,除了文中特別加以標(biāo)