由式（1）、（2）可知Ⅰ、Ⅱ区的排土场的重力不同，相应的摩擦力不同，本

From equations (1) and (2), it can be seen that the gravity of the dumps in zones Ⅰ and Ⅱ is different, and the corresponding friction is different. This paper studies the influence of k and j on stability under the condition of simultaneous treatment of the substrate in zones Ⅰ and Ⅱ. Analyze the influence of different base treatment positions on stability from the perspective of random distribution. Since excavation and dumping in the same area cannot be carried out at the same time, considering special circumstances, only the bottom of the step slope of the dump or the base of the slope shoulder is processed. Sufficient anti-skid force, so it is necessary to strengthen the study of the law of excavation and soil dumping in open-pit mining operations to ensure that the friction force reaches a larger value under the condition of random dumping.

By (1), (2) it can be seen that I., II. area of the draining field gravity is different, the corresponding friction is different, this paper studies the I., II. zone simultaneously deal with the substrate conditions k, j on the stability of the impact, not from the random distribution point of view to analyze the impact of different base treatment position on stability, because the same area mining and draining work can not be carried out at the same time, considering special circumstances, only the bottom of the slope or slope shoulder base will not be able to provide adequate resistance, Therefore, it is necessary to strengthen the study of the law of extraction and draining in open-pit mining operations to ensure that the friction reaches a greater value under the condition of random soil draining.

From formula (1) and (2), it can be seen that the gravity of the dump in area I and II is different, and the corresponding friction force is different. In this paper, the influence of K and j on the stability under the condition of simultaneous treatment of basement in zone I and II is studied. The influence of different base treatment positions on stability is not analyzed from the perspective of random distribution. Since excavation and dumping in the same area can not be carried out at the same time, only dumping is considered in special cases If the base at the bottom or shoulder of the field bench is treated, it will not be able to provide enough anti sliding force. Therefore, it is necessary to strengthen the research on the excavation and dumping laws in the open-pit mining operation, so as to ensure that the friction force can reach a large value under the condition of random dumping.<br>