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Mechanism of energy limit equilibrium of rock burst in coal mine.pdf
MiningScienceandTechnology(China)21(2011)197-200
Mechanism ofenergylimitequilibrium ofrockburstincoalmine
WangJiong,b一.YanYubiao一.JiangZhengjun一。qiPing一,ChenChen.b
SchoolofMechanics CivilEngineering,ChinaUniversiWD,Mining Technology,Beqing100083.China
StateKeyLabomatryoftra pRockMechanicsandUndergroundEngineering.ChinaUnive~ity0,Mining Technology,O~ing 100083,China
A R T lC L E IN F 0 A B S T R A C T
Articleh~atry: W iththeincreaseofminingdepth.theeffectofrockburstoncoaIminingisbecomingmoreandmore
Received24August2010 obviousand therockburstmechanism becomesmoreandmorecomplicated.Scholarsfrom many
Receivedinrevisedform
countrieshadputforwarddifierentmechanisms.butnoonegaveareasonableexplanation tothe
22September2010
mechanism ofrockburst.In thispaper,basedon theenergytheories.we studied theenergylimit
Accepted 11October2010
equilibrium (ELE)0fcoaIminerockburst.ThecoaIseamwithrockburstisdividedintoenergylimit
equilibrium zone(EU!Z)(A)andelasticzone(B):wealsodeterminedthepositionwheretherockburst
occurs.includingtheroo fandfloorofcoaIseams:inaddition.wederivedthelimitwidth0fEU2andthe
Keywords:
mathematicrelationshipbetweenthelimitwidthandoccurrencemechanism ofrockburst:theene理
Rockburst
Elasticzone difI_erencefunction(EDF).w(x)=wt—wn.becausefirst-orderderivative’0c).islessthan0.S0EDFis
Limitstress amonotonicallydecreasingfunction.Th egraphoftheenergydifferencefunctionwasalsodetemr ined.
EnergylimitequilibriumCELE) throug【hwhichweanalysedtheoccurrencemechan
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