Open pit mine internal dumping and covering resource mining method

Abstract

The invention relates to the field of open pit mining, in particular to an open pit mine internal dumping and covering resource mining method. The method comprises the steps of calculating an economic and reasonable stripping ratio, determining a stable slope angle, determining a coal pillar leaving width, and performing timely internal dumping and wall compression after mining. The method considers the economy and safety, and the maximum coal mining amount can be ensured under the conditions of safety and economy. According to traditional open pit mine internal dumping and covering mining area mining, raw coal mining is carried out only according to a designed slope angle, so that the coal pillar leaving width is large and the loss of coal pillar resources is excessive. In the method, the raw coal mining amount can be increased, and the mining method is more reliable.

Description

technical field [0001] The invention relates to the field of open-pit mine mining, in particular to a mining method for internal exhaust and overburden resources in an open-pit mine. Background technique [0002] Open-pit mines are divided into mining areas for mining. The mining area is mined first without leaving the ditch for internal drainage and overburden, and then the mining area needs to be stripped twice from the inner dump site in the mining area to extract the resources covered by the inner dump site. . Since the mined coal seam is incomplete and the side walls are "triangular coal", in order to improve the economic benefits of the open-pit mine, it is necessary to determine the width of the coal pillar, and then mine the raw coal in the mining area after mining. At present, the overburden mining area in the open-pit mine is only mined according to the designed slope angle, resulting in a large width of coal pillars and excessive loss of coal pillar resources. ...

AI Technical Summary

Problems solved by technology

At present, the overburden mining area in open-pit mines only mines raw coal according to the designed slope angle, resulting in a large width of coal pillars and excessive loss of coal pillar resources.

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