In view of the large deformation of surrounding rock after the original bolt-mesh-cable-shotcreting support in large section soft rock roadway in a mine,the causes of roadway deformation and fail-ure are analyzed.The combined support method of bolt-mesh-cable-shotcreting+grouting reinforcement is proposed to improve the overall support strength of surrounding rock and control the large deformation and roof fall of surrounding rock.Through engineering practice,in the 180 days of monitoring,the deformation of surrounding rock is more severe in 30～90 days,and gradually tends to be stable after 120 days.The maxi-mum deformation of roof and floor and the convergence of two sides are 192 and 117 mm respectively,and the control effect is obvious.
关键词
大断面/软岩/围岩变形/注浆加固
Key words
large section/soft rock/surrounding rock deformation/grouting reinforcement
维普
万方数据