Numerical Simulation Research on Movement and Impact Failure of Surrounding Rock in Isolated Working Face
CAO Jianjun
YI Enbing
Abstract：To counter to the characteristics of T-shaped overlaying strata in the isolated working face, analysis was made on the yield failure characteristics and the stress distribution law of the overlying strata in the mining process of the isolated working face with numerical simulation method. Research was carried out on the change law of the stress, acceleration, displacement and deformation velocity of the roadway under the strong impact load produced by the overlying strata failure in the isolated working face. The results showed that the plastic failure of the surrounding rock in the initial stage of mining mainly concentrated in the roof of the working face, and in the late stage of mining, the plastic zone of the rock gradually developed to the overlying strata, presented an“arc-shaped” symmetric distribution;the deformation of roadway’ s two sides was smaller than that of roof and floor under the seismic disturbance, the velocity variation of the right side and roof of the roadway was larger and the roof convergence was big, the vertical stress in two sides of the roadway was larger than that in the roof and floor. Through research, the movement and impact failure law of the overlying strata in the isolated working face was obtained, which can provide theoretical guidance for rock burst prevention in the working face, the formulation of preventive measures and the safe mining of the working face.
Keywords：isolated working facesurrounding rock movementrock burstmine earthquakeyield failure
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 20-23 )