A method for determining the parallel development step of internal and external dumps in soft rock open-pit coal mines

Abstract

The invention discloses a method for determining the parallel development step distance of internal and external dumps in soft rock open-pit coal mines, which belongs to the technical field of open-pit mining. The method firstly determines the outer dump, the stope and the inner dump separately or separately according to the service life of the slope. The safety reserve coefficient of the tall compound slope composed of the combination of the two or the three, and then according to the shape of the slope, the bishop method and the residual thrust method are used to calculate the stability coefficient of the slope alone or the combination of the two or the three, and compare the other The error between the safety reserve coefficient and the flat plate width of the outer dump, the distance between the top of the stope and the bottom of the outer dump, and the flat width of the inner dump are adjusted respectively. Based on the optimal value of the above values, Adjusts the step forward at which the outer dump should progress. The invention can quickly and fully occupy the space of the inner and outer dumps, can shorten the stripping distance, reduce the mining cost of open-pit coal mines, and overcome the disadvantages of lagging development of the outer dumps and large transport distance in the traditional design.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to a method for determining the parallel development step distance of internal and external dumps of soft rock open-pit coal mines. Background technique [0002] Quickly occupying the inner and outer dumps is an important way to achieve safe, efficient and green mining in open-pit coal mines. However, the stability of the tall composite slope composed of inner dumps, stopes, and outer dumps directly threatens the stability of open-pit coal mine workers and employees. Equipment Security. In the previous slope shape design process, after the stope reached the boundary, a fixed distance was maintained between the outer dump and the stope. When the inner dump developed far or reached the surface, the outer dump It was only followed up, which led to the lag in the development of the outer dump site, the increase in transportation distance, and a serious increase in the cost of o...

AI Technical Summary

Problems solved by technology

In the previous slope shape design process, after the stope reached the boundary, a fixed distance was maintained between the outer dump and the stope. When the inner dump developed far or reached the surface, the outer dump It was only followed up, which led to the lag in the development of the outer dump site, the increase in transportation distance, and a serious increase in the cost of open-pit coal mining

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