Asymmetrical bolt-mesh support technique of deep soft-rock roadway under complex conditions

On the isolated mining face, the strength of the coal pillar obviously degraded since the coal pillar near to the gob was under the influence of the abutment pressure by the two sides of the recovered coal face. Thus, the differences of the deformation of the two roadway sides were remarkable. Based on the field experiments and numerical simulation on the isolated coal face in a coal mine of Shenyang Coalmine Company, the stability problem of deep soft rock roadway was successfully solved by using the asymmetrical bolt-mesh support technique. Numerical simulations and field experiments show that the deformation of the two sides of the roadway became compatible and coordinate. And it can also effectively control the convergence of the soft rock roadway. The research results can be very useful for the soft rock roadway support in the coal mines with the similar conditions.