DOI: 10.11799/ce201712017
Study on stress relief effect of coal body blasting in high stress zone of coal pillar
LI Peng
LIU Zhi-gang
Abstract：As an important rock-burst prevention measure,stress relief blasting has been widely used in mine rock-burst.Based on the numerical simulation method,we established the calculation model of nonlinear dynamic of 5303 track roadway,by using FLAC3D nonlinear dynamic module and Mohr-Coulomb elastoplastic constitutive equations,to study the stress concentration and the stress relief effect of blasting on high-stress area near coal pillar.The results show that:when the roadway aproaches the coal pillar boundary region,high stress concentration phenomenon is more obvious in roadway;the dynamic simulation displays vertical stress peak on blasting area of model is significantly reduced,the high stress area is transferred to the deep coal;according to monitoring results,stress reduction is more than 65％ by blasting in 5303 track roadway.
Keywords：stress area near coal pillarthe stress concentrationthe numerical simulationdynamic analysisstress relief blasting
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 66-68,72 )