Research on cooperative control method of comprehensive pressure relief and anchor grouting reinforcement in deep mining roadways

Abstract

To address the surrounding rock control problems in high-stressed deep mining roadways, we used Suncun Coal Mine with maximum mining depth in China as the engineering background to analyze failure laws of surrounding rock of gob-side entry driving. Combined with field tests of anchor grouting parameters, we carried out numerical simulation with multi factors. The evolution of surrounding rock stress and displacement under different pressure relief parameters were clarified. On the basis, we proposed an integrated control method for the comprehensive pressure relief for coal and rock mass and anchor grouting reinforcement in deep mining roadway. We used geomechanical model test to compare gob-side entry driving method and this new method. The results showed that this new method can reduce average stress at the working face by 15.8% and peak stress of roadway shoulder by 12.5%. We applied this method in the field, which reduced roadway deformation by 535 mm.