In order to prevent and control the rock burst in the roadway,the theoretical analysis method was used to derive the theoretical solution of the critical convergence displacement of the rock burst roadway.The control variable method was used to analyze the influence of mechanical properties of the surrounding rock,the supporting stress and the radius of the roadway on the critical convergence displacement.The results show that the theoretical solutions of critical convergence displacement,mechanical properties of surrounding rock,supporting stress and roadway radius are established.The fitting equation of the mechanical properties of surrounding rock to the critical convergence displacement is obtained.The critical convergence displacement decreases with the increase of deformation modulus index,elastic modulus,residual modulus and residual strength.The critical convergence displacement increases with the increase of damage internal friction angle and softening modulus.The fitting equation of support stress and roadway radius to critical convergence displacement is obtained.The critical convergence displacement increases with the increase of support stress and roadway radius.The smaller the critical convergence displacement is,the greater the risk of rock burst is.The research results provide theoretical support and technical guidance for the effective prevention and control of rock burst.
关键词
冲击地压/临界收敛位移/围岩力学性质/支护应力/巷道半径
Key words
rock burst/critical convergence displacement/mechanical properties of surrounding rock/supporting stress/roadway radius
维普
万方数据