Numerical simulation study on the width of coal pillar in dynamic pressure roadway

Abstract

The deep coal mine roadway is easy to deform and destroy under the high ground stress. At the same time, it is disturbed by the mining stress of the adjacent working face. At present, the scope and size of the influence of stope mining are mainly studied at home and abroad. However, there is not enough understanding of the propagation law of the working face support pressure and the surrounding rock control of the deep well dynamic pressure roadway, and there is no in-depth study of the influence of the pillar width on the stability of the roadway. Therefore, this paper comprehensively uses the methods of field investigation and FLAC3D numerical simulation to study the deformation and stress distribution of surrounding rock under the influence of mining. By using FLAC3D numerical simulation software, this paper studies the distribution of surrounding rock stress and the law of surrounding rock deformation under different pillar width in the mining process of adjacent working faces. Studying conclude that when the pillar width is 80m, the roadway is less affected by mining.