关键词: 顶煤破碎, 采动影响, 变形机理, 应力环境, 控制技术

Abstract: In order to solve the problem of large deformation and serious damage of broken surrounding rock roadway under the top coal failure area, taking the auxiliary transportation roadway of 32103 working face of hanzui mine as the research object, the stress distribution and deformation mechanism of roadway surrounding rock are studied by combining field measurement and theoretical analysis. The results show that the top coal failure area in the roof of 32103 auxiliary transportation roadway is discontinuous distribution. The adjustment of surrounding rock stress environment of 32103 auxiliary transportation roadway and the reduction of effective bearing width of top coal pillar and section pillar are the main reasons for the obvious ground pressure behavior of roadway. Based on the above detection and theoretical analysis results, the roadway surrounding rock control technology based on "deep and shallow hole grouting + anchor mesh cable" combined support and the reinforcement technology based on "shed + floor pressure relief" are proposed. The field application results show that after the new support scheme is adopted, the maximum roof and floor displacement of surrounding rock in 32103 auxiliary transportation roadway is 70mm, the maximum convergence of two sides is 48mm, the supporting bolt is not broken, and the bolt stress and surrounding rock deformation are in a reasonable range, and the roadway support effect is good.