Research of roadway deformation induced by mining disturbances and the use of subsection control technology

To address the problem of instability and failure 11,514 return air roadway caused by dynamic pressure in Jinhuagong Coal Mine, this study uses theoretical analysis, numerical simulation, field test methods. The disturbance deformation mechanism surrounding rock control technology for during face-to-face mining excavation are analyzed. results show that causes regional asymmetric multiple superpositions lateral bearing 11,812 mined-out area, stress 8814 working face, advanced roadway. When faces meet, is affected superimposition stress. At same time, solid coal side relief area face upper seam, distribution principal on both sides rock. Based differences superimposed different parts roadway, a subsection proposed. This focused supporting secondary reinforcement range 40 m before after overlap position Field measurement data confirm effectiveness support technology.