In order to solve the large deformation problem of mining roadway under composite soft rock condition,the WIIS36-6 transport channeling in Liujia Coal Mine was taken as an engineering example,and the optimal parameters of the coupled support of bolt-net and cable were studied by means of numerical simulation and orthogonal test,and parameters such as bolt length,bolt diameter and anchor length were determined by design test and range analysis.The simulation analysis showed that the optimal support scheme can reduce the vertical displacement of roof and floor by more than 70%compared with the original support scheme,and the coupled support scheme can significantly improve the stress state of surrounding rock and control its deformation and failure.It provides a reliable reference for the support design of mining roadway.
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