Surrounding Rock Control Technology of Deep Soft Rock Roadway in a Coal Mine in Shanxi
Aiming at the problem of large deformation of surrounding rock in deep soft rock main haul-age roadway of a coal mine in Shanxi Province,by analyzing the influence of different side pressure coeffi-cient on the plastic zone range of surrounding rock,the maximum plastic zone depth is 1.8 m.According to the geological conditions and stress field distribution of the roadway,the combined support method of'an-chor net cable spray+wall grouting' is proposed.Numerical simulation and field monitoring show that the maximum roof-to-floor and two-side convergence are within 150 mm after the support scheme is adopted,which effectively controls the deformation of roadway surrounding rock.
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