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1、第42卷第5期礦業(yè)安全與環(huán)保Vol42No52015年10月MININGSAFETY&ENVIRONMENTALPROTECTIONOct2015鄧玉華,孫國文,黃滾.傾斜煤層深部開采覆巖破壞規(guī)律的數(shù)值模擬研究[J].礦業(yè)安全與環(huán)保,2015,42(5):15-20.文章編號:1008-4495(2015)05-0015-06傾斜煤層深部開采覆巖破壞規(guī)律的數(shù)值模擬研究1,231,2鄧玉華,孫國文,黃滾(1.重慶大學(xué)煤礦災(zāi)害動力學(xué)與控制國家重點實驗室,重慶400044;2.重慶大學(xué)資源及環(huán)境科學(xué)學(xué)院,重慶400044;3.重慶工程職業(yè)
2、技術(shù)學(xué)院礦業(yè)與環(huán)境工程學(xué)院,重慶400037)3D摘要:基于摩爾庫倫巖石破壞準(zhǔn)則,以研究傾斜煤層深部開采覆巖破壞規(guī)律為目的,利用FLAC數(shù)值軟件對開采全過程隨工作面推進(jìn)時圍巖的應(yīng)力、位移和破壞情況進(jìn)行了模擬分析,初步揭示了覆巖的破斷特征及移動規(guī)律受到分步開挖引起的應(yīng)力重新分布的影響。依據(jù)采動時滲透率與應(yīng)力變化的經(jīng)驗關(guān)系,通過FISH語言編程,建立了煤巖體滲透率比率系數(shù)的數(shù)值模型,并以此計算出采動后該系數(shù)的變化,進(jìn)而表征出煤巖層開采卸壓范圍,為傾斜煤層深部開采時圍巖的控制和瓦斯治理提供有力保障。關(guān)鍵詞:傾斜煤層;摩爾庫倫準(zhǔn)則;數(shù)值模擬;覆巖
3、破壞中圖分類號:TD325文獻(xiàn)標(biāo)志碼:A網(wǎng)絡(luò)出版時間:2015-10-0719:47網(wǎng)絡(luò)出版地址:http://www.cnki.net/kcms/detail/50.1062.TD.20151007.1947.008.htmlNumericalSimulationofOverburdenStrataFailureLawinDeepMiningofInclinedCoalSeam1,231,2DENGYuhua,SUNGuowen,HUANGGun(1.StateKeyLaboratoryofCoalMineDisasterDynamic
4、sandControl,ChongqingUniversity,Chongqing400044,China;2.SchoolofResourcesandEnvironmentalSciences,ChongqingUniversity,Chongqing400044,China;3.SchoolofMiningandEnvironmentalSciences,ChongqingVocationalInstituteofEngineering,Chongqing400037,China)Abstract:BasedonMohr-Coulom
5、bCriterionofrockfailureandforthepurposeofstudyingtheoverburdenrockfailurelawoftheinclinedcoalseamindeepmining,inthispaper,simulationanalysiswasmadeonthestress,displacementandfailureof3DsurroundingrockinthewholeminingprocesswiththeworkingfaceadvancebyusingFLACnumericalsoft
6、ware,whichpreliminarilyrevealedthatthefailurefeatureandmovementruleoftheoverburdenstratawereinfluencedbythestressredistributioninducedbystepexcavation.Anumericalmodelofthecoal-rockmasspermeabilityratiocoefficientwasestablishedaccordingtotheempiricalrelationshipbetweenthep
7、ermeabilityandmining-inducedstressvariationinminingandbyusingtheFISHprogramminglanguage.Thecoefficientchangeafterminingwascalculatedbyusingthismodelanditwasthenthecharacterizationofthepressurereliefrangeofthecoalseamduringmining.Alloftheseprovidedastrongguaranteeforsurrou
8、ndingrockcontrolandgastreatmentindeepminingoftheinclinedcoalseam.Keywords:inclinedcoalseam;Mohr-