Study on slope stability and tracking distance variation of inner pressure foot

Based on the engineering background of Hequ Open-pit Mine, this paper analyzes the bottom slope displacement cloud map, the maximum shear strain increment cloud image at different tracking distances, and the different pressure feet in Hequ Open-pit Mine. The slope stability changes at the lower end of the tracking distance. The research results show that under different tracking distances of the inner row presser foot, the end side slope forms different areas of dangerous areas and settlement areas. With the continuous reduction of the inner row presser foot tracking distance, the end side slope danger area and settlement area gradually migrate to the working side, close to the dumping yard and the bottom of the end side slope to form a bottom drum area, the end side slope sliding form is approximately “convex”; the inner row tracking distance and the end side slope stability coefficient obey the Boltzmann function relation. When the tracking distance is reduced from 150 m to 100 m, the stability coefficient of the end slope has a cliff-like change. Therefore, a reasonable tracking distance of the inner row presser foot can not only improve the stability of the side slope, but also improve the economic benefits of the mine. The use of the inner row presser foot measure to improve the stability of the end side slope is also a kind of both appropriate and economical method.