Sidewall and Corner Strengthening Support Control Technology of Coal Roadway with Soft and Broken Surrounding Rock

As the material roadway of D1206 working face in Xinyu Mine was coal roadway with soft and broken surrounding rock, in order to control its stability, th e characteristics of strata behavior and failure mechanism were analyzed, and comparative analysis was made between the original and optimized support schemes usi ng numerical simulation method, then the sidewall and corner strengthening support control technology was proposed and applied in engineering practice. The monitori ng results showed that the roadway surrounding rock deformation was small in optimal support scheme, which the maximum deformation of the roof was 59 mm, the ma ximum deformation of left sidewall was 99 mm, the maximum deformation of right sidewall was 134 mm, the maximum bed separation volume was 35 mm, thus the stabi lity of coal roadway with soft and broken surrounding rock was proved significantly. The sidewall and corner strengthening support control technology could effectively C ontrol the deformation of coal roadway with soft and broken surrounding rock, according to reinforce the support strength of sidewall and corner, the stability of sidewall and corner as well as the roof support strength could be improved, therefore, the whole roadway stability was enhanced.