Supporting design and optimization of large section roadway with straight wall and semicircle arch

Aiming at the problem of supporting difficulties and serious deformation in large section roadway,took the 2nd rail roadway in Xinyu mine as engineering background,the method of theoretical calculation combined with numerical simulation are adopted to analyze characteristics of deformation and damage in roadway surrounding rock,the stress state and plastic zone distribution are also analyzed.Based on above researches,the optimal supporting parameters are proposed and applied in engineering practice with field condition.According to the in-situ monitor data,the new scheme can effectively control deformation of roadway surrounding rock,improve the overall safety.The research results show: Strengthen the support strength of sidewall and corner can improve the stability of roadway as they are the key support parts.