Stability and Support Technology of Large Deformation Stoping Roadway in Broken and Soft Coal
Due to issues such as weak coal seams,developed cracks,non-dense surrounding rock fracture and deformation,and unreasonable support parameters in the roadway of Hongxing Coal Industry Company,it has brought huge challenges to the safe mining of the mine.A theoretical analysis was conducted on the impact of active and passive support on the stability of tunnels,and a new support scheme was proposed and field experiments were conducted.During the experiment,an active passive coupling support scheme of"bolt,W-steel strip"+"anchor cable,anchor cable beam"+"I-shaped steel shed"was implemented in 29107 tunnel,and real-time monitoring of the convergence deformation of the displacement of the two walls,roof,and floor of the tunnel was carried out.The results showed that the scheme effectively controlled the deformation of the tunnel surrounding rock and ensured the stability of the tunnel.
broken and soft coallarge deformation roadwayroadway supportstability
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