Coordinated control of pressure relief and energy absorption support of deep mining roadway

The high stress roadway in deep mines with fully mechanized top coal caving method faces the problems of high surrounding rock energy, large convergence deformation of surrounding rock, and easy failure of support under the traditional support and pressure relief mode. In order to solve this problem, the deformation and failure laws of this roadway with the traditional support and pressure relief parameters are analyzed based on the engineering background of the kilometer deep mine—Zhaolou Coal Mine. The numerical test research on the optimization of pressure relief opportunity of this kind of roadway is carried out. The evolution laws of the surrounding rock stress and displacement of the roadway under different pressure relief opportunity are analyzed. It is obtained that the control effect of the surrounding rock deformation of the roadway is improved by more than 20% after optimization. Combined with the above research, the coordinated control method of pressure relief by drilling and energy absorption by support in deep mining roadway is proposed. The research on parameter design and field application of the new method for deep mining roadway is carried out. The change laws of surrounding rock energy, stress and displacement of deep mining roadway with high stress are analyzed, and the advantages of coordinated control of this new method are clarified. The average deformation of surrounding rock is reduced by 46.6% by the new method, which ensures the safety and stability of the high stress roadway in deep mines.