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1、太原理工大學碩士學位論文承壓水上采煤斷層失穩(wěn)突水的研究姓名:劉志軍申請學位級別:碩士專業(yè):工程力學指導教師:胡耀青20040501太原理工大學碩士研究生學位論文承壓水上采煤斷層失穩(wěn)突水的研究摘要我國煤田地質條件復雜,許多煤礦不同程度的受奧灰?guī)r含水層的威脅,突水是采礦過程中常常面臨的一種嚴重災害。隨著采掘的延深、規(guī)模的擴大,突水災害日益嚴重。大量工程實例表明:承壓水的突出絕大多數(shù)是與斷層有著直接關系的。因此,對煤層頂?shù)装宓淖冃纹茐囊?guī)律、構造特征以及斷層各要素的研究都是防治奧灰?guī)r含水層突水的關鍵問題。作者在對承壓水上采煤突水機理、有限單元法的計算理論和
2、計算方法深入研究的基礎上,建立了含斷層圍巖變形破壞的力學模型,并應用Fortran語言編制了有限元計算程序。運用數(shù)值模擬的方法深入細致地分析了帶壓開采中圍巖、煤柱及斷層的應力、位移分布規(guī)律;對影響煤層底板破壞突水的諸多斷層因素進行分析,得出了單一因素對突水的影響關系、以及與突水臨界煤柱的關系。在其他條件一定的條件下,研究了斷層傾角、厚度及斷距等綜合因素與煤柱合理留設的相關規(guī)律,并給出了表達式。承壓水上采煤的數(shù)值模擬實驗有助于我們合理留設煤柱寬度、提出合理的開采方案,在開采中提高生產效率并避免礦井突水事故的發(fā)生。關鍵詞:承壓水上采煤,斷層突水,防水煤
3、柱,數(shù)值模擬多元回歸太原理工大學碩士研究生學位論文THESTUDY0NⅥ(ATERINRUSHTHROUGHINSTABILITYFAUI汀SFORCAOLMINGINGABOVECONFINEDAQUIFERABSTRACTManycoalmineinourcountrysuffersfromtheOrdovicianperiodKarstcontainingwaterinrushfrequentlyduetothecomplexgeologycondition,Waterinrushisaseriousdisasterincoalmining.
4、Alongwiththeminingdeeplyandthescaleextends,thedisastm。ofwaterinrushincreasinglyseriously.Thelargequantityinstanceindicatethatgreatmajoritydisasterofwaterinrushincoalminingaboveconfinedaquiferhavethedirectrelationwithfault.Therefore,studyonthedeformationandbreakagelawofupperand
5、downfloorofcoallayer,thecharacterofformation,eachfaultfactorarethekeyproblemforpreventionthewaterinrush.Basedonthestudyaboutthemechanismofwaterinrushfromcoalseamfloorincoalminingaboveconfinedaquiferandthecomputeprincipleandcomputemethodoffiniteelementmethod,mechanicsmodelismad
6、eaboutdisplacementandfailureonwallrockwhichcontainfault,andFEMcalculationprogramismadewith“Fortran”.Withthemethodofnumericalsimulation,thepaperstudiedsystematicallythedistributinglawonthestressanddisplacementofupperanddownfloorofcoalIllayer,coalpillarandfault;throughanalysisea
7、chfaultfactorswhichinfluencewaterinrush,gainedrelationthateachfactorinfluencewaterinrush,andtherelationthatbetweentheremainingcoalpillarandthefactors.Underthecertainconditionsofotherfactors,theregulationofcorrelatingis。tudiedonthefaults’dipangle,thicknessandfallwiththeremainin
8、greasonableCOalpillar.Numericalsimulationforcoalminingaboveco