Method and apparatus of adjusting opencast coal mine production stripping ratio

Abstract

In the invention, the embodiment discloses a method and an apparatus of adjusting opencast coal mine production stripping ratio. The method comprises following steps: obtaining an advanced area, in which the natural stripping ratio is intensively changed in an advancing direction of an original mining pit; performing grooving and deepening in the advanced area to form an advanced stripping pit, wherein a minimum earth surface distance between the advanced stripping pit and the original mining pit is calculated according to a preset distance calculating formula; and performing coal mining in a manner of synchronization advancing and deepening of the original mining pit and the advanced stripping pit. By means of the method and the apparatus, ore production efficiency can be optimized.

Description

technical field [0001] The invention relates to coal mining technology, in particular to a method and a device for adjusting the production stripping ratio of an open-pit coal mine. Background technique [0002] Open-pit coal mining is to strip the overburden and rock covering the upper part of the coal mine body and its surroundings, and transport the stripped overburden and rock (rock and soil volume) to the dump site, so that it can be extracted from the open coal mine body. In the direct mining of coal ore, the ratio of the amount of rock and soil stripped to the amount of ore mined is called the stripping ratio, including the natural stripping ratio and the production stripping ratio. [0003] When the coal mine ore body is buried shallow or there is an outcrop on the surface, the ore is mined by open-pit method, which is called open-pit coal mine. Open-pit mining has great advantages. Open-pit mining is to excavate a series of open-pit trenches from the surface to eac...

AI Technical Summary

Problems solved by technology

However, the existing method of adjusting the production stripping ratio by optimizing the coal mine mining procedures and mining parameters has certain limitations in the ability to adjust the stripping ratio, especially for coal seams with complex geological structures and large dip angles.

For example, in the case of a large anticline geological structure causing the coal seam to change from near horizontal to inclined, resulting in a sharp change in the natural stripping ratio, optimizing the mining procedures and mining parameters of the coal mine has a limited effect on adjusting and maintaining the balance of the production stripping ratio

Therefore, how to adjust and control the production stripping ratio in the case of a sharp change in the natural stripping ratio in a short period of time, so as to maintain a balance in a certain period of time, so as to maintain a stable ore production capacity. The stripping ratio adjustment method of coal mine mining procedures and mining parameters is generally difficult to achieve the goal, and cannot meet the requirements of coal enterprises for balanced production stripping ratio adjustment, resulting in large fluctuations in the ore production capacity of open-pit coal mines. The equipment used for ore production The comprehensive utilization rate fluctuates violently, which cannot achieve better production efficiency, which in turn affects coal production and the economic benefits of coal enterprises

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