Abstract: Aiming at the support failure problem in rich water mudding roadway, the comprehensive research methods such as engineering geological investigation, numerical simulation and field measurement are adopted to analyze support failure mechanism and supporting schemes for the transportation cross heading roadway in southern mining area of Qidong Coal Mine. The results show that the support failure mechanism of the transportation cross heading roadway is mainly argillaceous weakening and rock rheology. In order to improve the self-bearing capacity of surrounding rock, the combined supporting scheme of “high strength and large elongation rate of anchors + intermittent short grouting” is proposed. The results of the numerical simulation and the engineering practice reveal that after applying the optimization of “high strength and large elongation rate of anchors + intermittent short grouting”, compared with the original supporting scheme, the convergence of roadways is reduced by 55.75%, the effect on controlling large deformation of surrounding rocks in mudding roadway is remarkable.