Method for optimizing mining boundaries of underlying seams of strip mines

A technology of mining realm and optimization method, applied in surface mining, earthwork drilling, underground mining, etc., can solve the problems of different economic stripping ratios of coal seams and the inability to maximize the economic benefits of ore deposit mining.

Inactive Publication Date: 2015-05-13
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

However, in open-pit mines with horizontal or near-horizontal composite coal seams, the mining cost is closely related to the location of the coal seam because the stripping, mining, and drainage works of each mineable coal seam are ahead and b...

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  • Method for optimizing mining boundaries of underlying seams of strip mines
  • Method for optimizing mining boundaries of underlying seams of strip mines
  • Method for optimizing mining boundaries of underlying seams of strip mines

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Embodiment Construction

[0068] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0069] Taking a near-horizontal composite coal seam open-pit mine in Inner Mongolia as an example, there are 1 2 ,2 1 , No. 3 and other mineable coal seams, such as Figure 5 shown. In the preliminary design of the open-pit mine, it was determined that the main mining coal seam in the second mining area was 1 mineable in the whole area. 2 Coal seam, deep boundary with 1 2 Coal seam floor as boundary, 2 1 , No. 3 coal seam shall not be exploited. In line with the principle of making full use of coal resources and increasing resource recovery, the mine carried out supplementary exploration on the second mining area of ​​the open-pit mine. According to the supplementary survey report of the second mining area, at a distance of 1 2 The average depth of the coal seam is 65m, and there is No. 3 coal seam with an average thickne...

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Abstract

The invention provides a method for optimizing mining boundaries of underlying seams of strip mines. The method comprises steps as follows: establishing a model for the cost caused by increase of the internal drainage distance of overburden materials of overlying seams due to mining of the underlying seams; establishing a model for the extra unit mining cost for mining of the underlying seams with the optimized overall economic benefit of ore deposit mining as the goal; determining the extra unit mining cost for mining of the underlying seams; establishing an average thickness function of the underlying seams and an average thickness function of overlying strata of the underlying seams; delineating the mining boundaries of the underlying seams of the composite seam strip mines. According to the method, the extra unit mining cost for mining of the underlying seams is considered, so that the economic stripping ratio of the underlying seams of the horizontal or near-horizontal composite seam strip mines is optimized, the reasonable economic stripping ratio is determined, the mining boundaries of the underlying seams are adjusted reasonably, and the better economic benefit can be created.

Description

technical field [0001] The invention belongs to the technical field of ore deposit mining, in particular to a method for optimizing the mining boundary of the lower coal seam of an open-pit mine. Background technique [0002] In the mining design of open-pit coal mines in my country, the boundary stripping ratio n is widely used k Less than or equal to economic stripping ratio n j The principle of delineating the boundary of open pit mining. The traditional method to delineate the mining boundary of composite coal seam open-pit mines usually regards each mineable coal seam as a whole, and determines the stripping ratio of the open-pit mine boundary through the side-line segment ratio method, and delineates the open-pit mine according to the principle that the boundary stripping ratio is less than or equal to the economically reasonable stripping ratio Mining boundaries. However, in open-pit mines with horizontal or near-horizontal composite coal seams, the mining cost is ...

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Application Information

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IPC IPC(8): E21C41/16
CPCE21C41/28
Inventor 刘闯刘光伟白润才曹博王东李成盛付恩三韩阳孙磊孙有刚李彬王强柴森林曲业明
Owner LIAONING TECHNICAL UNIVERSITY
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