中厚煤层沿空留巷围岩控制技术-研究

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1、太原理工大学硕士研究生学位论文STUDYONSURROUNDINGROCKCoNTROLTECHNOLOGYOFTHERETAININGROADⅥ，AYALONGGoAFINTHEMIDDLETHICKCOALSEAMABSTRACTWithcoalproductionincreasing，exceedofthegascontenthasbecomethemainreasonofhighproductionandefficiencyintheworkingplaneofmedium-thicknesscoalseam．Thetechnologyofretainingroadwayal

2、onggoafisoneofthemosteffectivewaystogovernhighgasintheworkingplane．RoadwayalonggoafCanalsogreatlyimprovetherecoveryrateofcoalresources，torealizereciprocatingmining，toreducetheminingroadwaydrivagerateandthemovingtime．Thistechnologyissuperiority，andhasremarkableeconomicbenefit．Inthispaper，through

3、thecombinationoftheoreticalanalysis，numericalsimulationandengineeringpractice，surroundingrockdeformationandactivitypaaemswerestudiedonthebasisofpreviousanalysis．Thearticleproposestechnologyofsurroundingrockcontrolofretainingroadwayalonggoafinmedium．thicknesscoalseam．Themainresearchworksareasfol

4、lows：(1)IntroducingHouChaojiongconceptofbigandsmallstructuresintoIII太原理工大学硕士研究生学位论文surroundingrockstabilitystudyofretainingroadwayalonggoafinmedium．thicknesscoalseam．UndertheactionofobturatorandMined．outareas’brokenrock，thehardoldroofwhichisaboveatthetestroadwayhasrebalancedandformedthenewstruc

5、ture．Wecalledlargestructureofsurroundingrockofroadway．Thehangingactionwithboltsandanchorcablemadetheunstableroofanchortogether，andthisstructurecalledthesmallstructureofsurroundingrock．(2)Throughtheestablishmentofthekeyblockmechanicsmodelandmechanicalanalysis，weconcludedthat：duringtheperiodofrec

6、overyoftheupperandlowerworkingface，thekeyblockoftestroadwayhaslargerotation，butnotloseitsbalance．SoiftheyCanmaintainimmediateroofstability，retainingroadwayalonggoafCanbesuccessfullyimplementedinmedium．thicknesscoalseam．(3)Proposedobturatormustbothhasenoughinitialsupportforceandhascertaincontrac

7、tility．BecausesufficientinitialsupportforcecarlensuretheobturatorcutofftheroofattheedgeofMined—outareas．CntractilepropertiesCanpreventobturator仔omdamagedbyupperlargestructure’Srotarysinking．(4)Roadsidepackinginmedium-thicknesscoal