In the large inclination substrate drain, the downward force of the drain field increases compared to the horizontal or near horizontal substrate, and the anti-slip force decreases.<br>Therefore, through substrate moulding technology to increase the friction between the substrate and the draining field, or to retain coal column, end help constraints and other measures to improve the stability of the drain site.<br>In the northern part of The first mining area of Anjialing open-pit mine, the friction of the contact surface is increased by using the substrate hemp surface blasting method to improve the stability of the drain site, and the c and φ of the contact surface of the treatment area are greater than the original contact surface value.<br>Due to the large inclination of the area, the soil draination field is developed in a single-layer tracking drain.
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