Optimization method for slope shape of end wall of open-pit mine

Abstract

The invention discloses an optimization method for the slope shape of the end wall of an open-pit mine, and belongs to the field of open-pit mining. The method includes the steps of combining specificconditions of the slope of the end wall of an open-pit mine, qualitatively analyzing stability influencing factors and a potential landslide mode; conducting a mechanical experiment on the rock massof the slope of the end wall of the open-pit mine to obtain physical and mechanical indexes; determining a safety reserve coefficient K of the slope of the end wall of the open-pit mine; dividing theslope of the end wall of the open-pit mine into n stages; adjusting the width of a flat plate at each stage, and when a stability coefficient Fs satisfies |FS-K|< / =0.01, completing the slope shape optimization of each stage; and combining a strength reduction theory algorithm, using FLAC3D finite difference numerical simulation software for simulation test on the optimal slope shape scheme obtained above, and further verifying the feasibility of the optimal slope shape. The method ensures the maximum recovery of the compressed coal under the end wall, provides a basis for the design of the slope shape, and also creates a large number of economic benefits for the open-pit mine.

Description

technical field [0001] The invention belongs to the field of open-pit mining, in particular to a method for optimizing the form of side slopes in open-pit mines. Background technique [0002] In order to ensure the long-term stability of the side slope of the large open-pit coal mine, the value of the side slope angle is too conservative in the design of the side slope, resulting in the surface boundary and the bottom boundary of the side slope of the open-pit mine being staggered and covered under the surface. A large number of coal resources have a negative impact on the economic benefits of open-pit coal mines. Therefore, how to design a reasonable end-side slope shape and recover coal pressure under the end-side is a major research focus in the field of open-pit mining. [0003] At present, most open-pit coal mines implement the internal exhaust pressure side technology, which greatly shortens the exposure length and exposure time of the end side, making it feasible to ...

AI Technical Summary

Problems solved by technology

When the existing technology optimizes the form of side slopes, most of them are steepened at small angles or locally based on experience and the current situation of slope forms. Although this method is feasible and has certain safety, it fails to take into account the maximization of economic benefits.

Images