CHINA MINE ENGINEERING

In order to reasonably determine the timing of abscission grouting hole completion and grouting, this paper uses FLAC^3D numerical simulation software to establish a numerical calculation model to simulate and analyze the evolution law of abscission during the advancement of the working face and the influence of the advancement of the working face on drilling. The research concluded that the timing for completing the abscission grouting drillhole is when the working face advances to 150m, and the best drilling position is 150m in front of the first cut and the middle position of the working face inclination.