Study on the pre-control of rock burst in the isolated island face of Tangshan mine

Rockburstisoneofthedynamicdisastersthatseriouslythreatenedthesafetyofmineproduction.Thestressconcentrationintheisolatedworkingfaceanditsroadwayishigh,andthecharacteristicsoftheviolentroofmovementmakeitmoreeasytooccurrockburst.Inviewofthecharacteristicsof isolatedworkingfaceinTangshanCoalMine,firstly,thecomprehensiveindexmethodwasusedtodeterminethedangerousgradeofworkingfaceY484,andtheworkingfacewasdividedintosevenweak impactstrength,twomediumimpactstrengthandthreestrongimpactstrengthareas.Later,borehole stressgaugeandcross-pointmethodwereadoptedtodeterminethepeakpositionandinfluencerangeof supportpressureinthearea.Accordingtodifferentdangerousgradesofrockburst,thetechnologyof boreholepressurereliefandblastingpressurereliefwereusedtopre-controlrockburst.Theapplication studyshowsthatthecomprehensivepreventionandcontroltechnologyissafeandeffectiveforthepreventionandcontrolofworkingfaceY484