Abstract:
The good surrounding rock stress environment is conducive to the safe excavation and maintenance of the adjacent mining roadway under the influence of mining movement. Through theoretical analysis and numerical simulation, the influence of 15° tilt to the coal pillar side and 15° tilt to the back of the working face on the lateral abutment pressure distribution of the working face under different cutting height is analyzed. The results show that the peak value of lateral abutment pressure at different distances from coal wall decreases with the increase of cutting height, and the Angle of cutting hole has little effect on the peak value of lateral abutment pressure. The Angle of cutting the top borehole has a significant influence on the peak position of lateral abutment pressure. The tilt of cutting the top borehole to the rear of the working face by 15° can eliminate the influence on the peak position of lateral abutment pressure when the cutting borehole is tilted to the coal pillar by 15°, which is conducive to the surrounding rock control of the adjacent mining roadway.