資源描述:
《傾斜煤層深部開采覆巖破壞規(guī)律的數值模擬研究.pdf》由會員上傳分享,免費在線閱讀,更多相關內容在行業(yè)資料-天天文庫。
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)律的數值模擬研究1,231,2鄧玉華,孫國文,黃滾(1.重慶大學煤礦災害動力學與控制國家重點實驗室,重慶400044;2.重慶大學資源及環(huán)境科學學院,重慶400044;3.重慶工程職業(yè)
2、技術學院礦業(yè)與環(huán)境工程學院,重慶400037)3D摘要:基于摩爾庫倫巖石破壞準則,以研究傾斜煤層深部開采覆巖破壞規(guī)律為目的,利用FLAC數值軟件對開采全過程隨工作面推進時圍巖的應力、位移和破壞情況進行了模擬分析,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力重新分布的影響。依據采動時滲透率與應力變化的經驗關系,通過FISH語言編程,建立了煤巖體滲透率比率系數的數值模型,并以此計算出采動后該系數的變化,進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。關鍵詞:傾斜煤層;摩爾庫倫準則;數值模擬;覆巖
3、破壞中圖分類號:TD325文獻標志碼:A網絡出版時間:2015-10-0719:47網絡出版地址: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-