急傾斜煤層頂煤注水軟化綜放回采巷道支護參數(shù)研究.pdf

1、論文題目：急傾斜煤層頂煤注水軟化綜放回采巷道支護參數(shù)研究專業(yè)：礦業(yè)工程碩士生：趙凱(簽名)指導教師：柴敬(簽名)摘要以受注水、爆破軟化影響的小紅溝煤礦590水平B6回采巷道為工程背景，綜合應用理論分析、物理實驗、數(shù)值模擬和現(xiàn)場實測相結合的研究方法，從錨桿（索）的理論出發(fā)，研究圍巖破壞機理、錨桿支護機理、錨桿力學作用機理以及回采巷道圍巖支護方法和參數(shù)。分析了水對煤和錨固體的弱化機理，給出錨固體破壞的4種方式，為工程實踐提供理論依據(jù)；運用數(shù)

2、值模擬，建立數(shù)值模型，計算得到各水平原始地應力場，并分析了注水孔孔隙壓力變化規(guī)律，以注水軟化后回采巷道圍巖破壞機理為切入點，對巷道松動圈范圍以及巷道鉆孔圍巖破碎狀況進行探測，了解巷道圍巖在礦山壓力、注水軟化下的破壞機理；最后依據(jù)礦壓觀測反饋的信息，對590水平B6回采巷道支護參數(shù)進行優(yōu)化設計。現(xiàn)場試驗結果表明，該研究成功解決了小紅溝煤礦注水軟化頂煤時回采巷道的支護問題，對于以后相似地質(zhì)條件的工程提供了簡單可行的技術方案。關鍵詞：急傾斜煤

3、層；注水軟化；錨桿(索)支護參數(shù)；回采巷道；礦壓觀測研究類型：應用研究Subject：ResearchonSofteningofSteepSeamRoofSupptParametersofRoadwaySpecialty：MiningEngineeringName：ZhaoKai(Signature)Instruct：ChaiJing(Signature)ABSTRACTInthispaperindertosoftenthewateru

4、ndertheinfluenceofroadwaydesigntobewatertosoftentheimpactofblastingXiaoHonggoumine590B6levelroadwayftheprojectbackgroundacomprehensivetheeticalanalysisphysicalexperimentsnumericalsimulationfieldmeasurementofcombiningrese

5、archmethods.Fthestudyofthecontentoftheboltfrombolt(cable)startingtheeticalanalysistostudytherockfailuremechanismboltingmechanismthemechanismofthemechanicalanchrockroadwaysupptingmethodtoanalyzethebodyofwateronthecoalthew

6、eakeningofanchingmechanismgiventhefouranchbodymeansdamageprovideatheeticalbasisfengineeringpracticetosoftenwaterroadwayrockfailuremechanismasthestartingpointoftheroadwayloosecirclebrokenrockwithinthescopestatusofroadwayd

7、etectionunderstingsurroundingrockpressureinmineswatersofteningrepeateditssupptbracketsupptingthefailuremechanismunderpressurenumericalsimulationtheestablishmentofnumericalmodelcalculatethelevelofiginalstressfieldanalysis

8、ofwaterbefeafterthemovementoftheroofcavingminesurfacepressurebehaviacteristicsfinalobservationbasedonrockpressurefeedbackinfmationcombinedwiththeinstabilityoftheacteristicsofrocktheresultsofthisstudythelevelof590B6roadwa

9、ysupptparameterstooptimizethedesign.FieldtestresultsshowthattheresearchresultsftheroadwaysurroundingrocktoprovideascientificbasisfcontrolsuccessfullyresolvedXiaoHonggoucoalminecoalinwatertosoftenthetopofthesupptingroadwa