Abstract: In order to study the effectiveness of anti-scour of bottom coal pressure relief and its influence on the roadway support scheme of 1305 face, energy attenuation theory and deformation integral method were used to calculate the energy absorbed by the hole on the side of roadway under strong impact conditions and the safety factor of the support system. Numerical simulation, effect investigation, deformation and stress analysis are used to analyze the influence of large-diameter drilling and slotted pressure relief on the support system. Finally, the cross method and dynamometer are used to monitor the deformation of roadway and the stress status of anchor bolt and cable respectively. The results show that the combined support scheme adopted by the roadway, such as anchor rod, anchor cable, braided metal mesh and T-shaped steel belt, has high support strength and surface protection ability, and can meet the requirements of the current roadway support and anti-scour. After the occurrence of large energy events along the working face, the energy released by coal and rock mass is 55.23～64.95 kJ, which is less than 136.7 kJ absorbed by the supporting system. The safety factor of the roadway supporting system is 2.07～2.48, which meets the requirements of anti-scour. Large diameter drilling and pressure relief grooving have little effect on the deformation of roadway surrounding rock, large diameter drilling has no obvious effect on roadway support system, and pressure relief grooving has little effect on roadway support system.