Research on Prevention and Control Technology of Rock Burst in Isolated Island Working Face with Triangular Coal Pillar
In order to solve the problem of rock burst prevention and control in the working face of the isolated island of the adjacent triangular coal pillar,the research status of rock burst under this condition in China was analyzed.Taking the Y392 working face of Tangshan mine as the research object,the main controlling factors of rock burst with large buried depth,overlying irregular coal pillars,triangular coal pillars and isolated island working faces are obtained through theoretical analysis.A numerical model was established by FLAC3D,and the stress distribution law of the isolated working face of the triangular coal pillar in this layer was analyzed.An anti-scouring method was proposed to regulate the main controlling factors of rock burst through roof pre-cracking.Finally,through the field engineering practice,the rock burst prevention and control technology based on roof pre-cracking was established and implemented,and the stress method and drill cuttings method verified that roof pre-cracking has a good effect on the prevention and control of rock burst under this condition.
rock bursttriangular coal pillarsisolated island working faceroof pre-crackingnumerical simulation
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