Open pit mine internal dumping and covering resource mining method

A mining method and technology for open-pit mines, which are applied in the field of mining overburdened resources in open-pit mines, can solve problems such as the loss of coal pillar resources and the large remaining width of coal pillars, and achieve the effects of increasing the amount of raw coal mined and the mining method being reliable.

Active Publication Date: 2021-05-28
中煤科工集团沈阳设计研究院有限公司 +1
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  • Abstract
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Problems solved by technology

At present, the overburden mining area in open-pit mines only mines raw coal according to the designe

Method used

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  • Open pit mine internal dumping and covering resource mining method
  • Open pit mine internal dumping and covering resource mining method
  • Open pit mine internal dumping and covering resource mining method

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Embodiment Construction

[0023] To make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, below in conjunction with the attached figure 1 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described in detail.

[0024] figure 1 It is a flow chart of a mining method for internal drainage and overburden resources in an open-pit mine in an embodiment of the present invention, as figure 1 As shown, the mining method for internal drainage and overburden resources in an open-pit mine includes the following steps:

[0025] The steps of calculating the economically reasonable stripping ratio, using the price method to calculate the economically reasonable stripping ratio;

[0026] The step of determining the slope stability angle is to determine the slope angle through the slope stability coefficient;

[0027] The step of determining the reserved width of the coal pillar is to determine the side mining bounda...

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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. ...

Claims

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Application Information

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IPC IPC(8): E21C47/02
CPCE21C47/02
Inventor 石广洋肖兵张洪黄月军赵明刘英璐关众马婧佳李苗苗曹宇贺永军
Owner 中煤科工集团沈阳设计研究院有限公司
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