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1、2012InternationalConferenceonComputerDistributedControlandIntelligentEnviromentalMonitoringStudyontheRelationsbetweenRoofShallowStrataTypeandRoofCavingHiddenDangerLevelLIUHongtao,TAOHan,CHENTao,RENQinhua,ZHUZhentaoFacultyofResourcesandsafetyEngineeringChinaUniversityofMinin
2、gandTechnology(Beijing)Beijing100083,Chinalht5004@sina.com,caikuangren@126.comAbstract—Inordertoexplorerelationshipbetweenthedifferenttypesofshallowroof,differentstructurecombinationII.MODELINGANDSETPARAMETERSofroofstrataandthelevelofroofcavinghiddendanger.BasedModelingproc
3、essbyusingtheplanestrainmodeltoonroofstabilitypartitionmethod,usingRFPAsoftware,simulatedifferentroofstratastructureundertheconditionofrespectivelyonsetamodelaboutSoft-tougheningtyperock,thestress-strainrelationshipanddeformationandfailureSoft-brittletyperock,Medium-toughen
4、ingtyperock,Mediumprocess.Designmodelwide50mhorizontaldirection,modelstrength-Mediumstiffnesstyperock,Hard-tougheningtypefor30mheight.Roadwayheightof2.5m,theburieddepthofrockandHard-brittletyperock,getthecharacteristicsofroofcoalseamiscalculatedaccordingtothe400munity,defor
5、mationandfailureattheconditionofdifferenttypesofroadwaywidthis5.0m.Allthephysicalmechanicalrock.TheresultsofthestudyshowthattheroofcavinghiddentroublelevelofSoft-tougheningtyperockandSoft-brittletypeparametersofrockpropertiesseetable1.rockisęlevelorabovelevelę.Theroofcaving
6、hiddenTABLEI.ROCKMECHANICSPARAMETERtroublelevelofMedium-tougheningtyperockiswillbeĘlevel,butStillmainlyforęlevel.TheroofcavinghiddenCompressiveTensileElastictroublelevelofMediumstrength-Mediumstiffnesstyperock,lithologystrengthstrengthmodulusPoisson'sdensity-3Hard-toughenin
7、gtyperockisbelongtoĘlevel,ęlevel.The/MPa/MPa/MParatio/g·cmroofcavinghiddentroublelevelofHard-brittletyperockisĘsandstone50560000.252.5level.Rockstrengthontheroofcavinghiddendangerlevelshale352.3345000.282.35influencepowerisimportantthanrockstiffness.mudstone251.6740000.272.
8、2Keywords-roofcavinghiddendangerlevel;Rocktypes;coal14.5120000.331.7Numericalsimul