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1、Subject:StudyonTechnologyofFullyMechanizedTop-coalCavingHighSafetyofCoalSeaminXiaoHong-gouCoalMineSpecialty:MiningEngineeringName:Malian-xing(Signature)Instructor:Chaijing(Signature)ABSTRACTInthispaper,itstudiesthetechnicalproblemofUrumqimininginsteeplyinclinedandextremelythickcoalseamw
2、ithlargethickness,highstrength,cavingandthepromotionoffullymechanizedtopcoalcavingminingtechnology.Firstly,throughanalysistothecoalseamminingtechnologyconditionandphysicalcharacteristicindicators,thecoalseaminUrumqiminingareaisidentifiedtobeatypicalhardthickcoalseam.Thenthepaperstudiest
3、hemaineffectsofthesixfactors(thecoalstrengthcoefficient,coalbedstructure,coalbodyintegrity,miningandcavingheightratio,hardroof,theorderofoccurrencedepth)onthetopcoalcavingintheUrumqiminingsteeplyinclinedcoalseaminfullymechanizedtopcoalcavingminingtechnology.Thepaperfurtherusingfuzzyclus
4、teringtomathematicalmethodtoB1+2andB3+6seamcavingindexundertooksananalysis,predictionandassessmenttothetopcoalcaving,anddeterminesthattheimpactofcoalcavingofthemainfactorsaffectingcoalseamistopcoalrockhardness,Hardclipbottlesandjointdevelopment.Thoughthesimulationtestandfieldobservation
5、ofmineralpressure,itobtainsbehaviorlawofminepressureoftheUrumqiminingsteeplyinclinedcoalseamsublevelminingandthemigrationruletopcoalfragmentation.Onthebasisofthis,combinedwithpracticalanalysisinsteeplyinclinedcoalseamcomprehensivemechanizationcavingcoalminingmachinethree-matchingconditi
6、onsandacomparativeanalysisoftopcoalpropertiesandweakeningtechnologyapproach,itdeterminesthereasonablemethodoftopcoalcavingtopcoalinadvancecontrolmethodforhydraulicfracturingblastinglooseningcomprehensiveweakeningtechnology,andproposestechnologyprogramoftheminingofworkingfacebyusingwater
7、injectionprocesslanehighweakeningtopcoal.ThroughindustrialtestoffullymechanizedtopcoalcavingfaceofXiao-honggoucoalmineintheUrumqiminingarea,workingsectionrecoveryreached87%,andachievedthedesiredresults.Researchshowsthat,forUrumqiminingsteeplyinclinedthickcoalseaminfully-mechani
