Mining method for passing open-pit coal mine of coal barren area through leaving island to build bridges

A technology for open-pit coal mines and mining methods, which is applied in surface mining, earth-moving drilling, underground mining, etc., can solve the problems affecting the economic benefits of open-pit mining, reducing ineffective stripping amount, and large transportation distance, so as to reduce ineffective stripping amount and shorten the The effect of peeling off the distance and reducing the distance from the goods

Inactive Publication Date: 2015-03-11
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0003] Under the premise of not changing the mining procedure, the traditional method of controlling the stripping ratio is to adjust the mining parameters of perforation, blasting, mining and transportation, and rock drainage. This method distributes the invalid stripping amount to different mining periods, and does not really reduce t

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  • Mining method for passing open-pit coal mine of coal barren area through leaving island to build bridges
  • Mining method for passing open-pit coal mine of coal barren area through leaving island to build bridges
  • Mining method for passing open-pit coal mine of coal barren area through leaving island to build bridges

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Embodiment 1

[0031] When the coal-free area of ​​the open-pit stope divides the working side into two parts, left and right, and the production stripping ratio on both sides of the non-coal area is not greater than the economic stripping ratio, the open-pit coal mine leaving the coal-free area of ​​the present invention is adopted. Island bridge mining method, that is, the whole island mining scheme, such as figure 1 shown, follow the steps below:

[0032] (1) In the process of coal mining, when the working gang of the open-pit coal mine stope advances to the coal-free area, the working gang reserves the island body space, such as image 3 As shown in (a), take the boundary of the coal-free area in the contour line of the coal seam floor as the bottom boundary of the island body in the island bridge. The width of the two-lane transportation and the final slope angle of the island body are calculated and determined according to the physical and mechanical indicators of the mine rock;

[0...

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Abstract

The invention belongs to the field of coal mining, and particularly relates to a mining method for passing an open-pit coal mine of a coal barren area through leaving an island to build bridges. The mining method comprises the following steps: when an open pit is advanced to the coal barren area, determining the range of an island body according to the range of the coal barren area, establishing an island-back transportation conveyer bridge between the island body of the pit and an inner dump, and building an island-front conveyer bridge when the inner dump crosses the island body of the pit. The mining method has the advantages of decreasing the overburden amount in the ore field, reducing the production stripping ratio, saving the land occupation of an outer dump, being environment-friendly, decreasing the mining disturbance of the pit, shortening the truck load distance, reducing the stripping and transportation costs, increasing the economic benefit and having wide practicability.

Description

technical field [0001] The invention belongs to the field of coal mining, and in particular relates to a mining method for open-pit coal mines with islands and bridges passing through coal-free areas. Background technique [0002] The open-pit mining boundary is the spatial outline formed at the end of the open-pit mining. When complex geological structures such as collapse columns and coal-free areas appear in the mining boundary, the coal seam will be discontinuous and partially unmineable. Therefore, it is necessary to reduce the ineffective stripping during mining. quantity. [0003] Under the premise of not changing the mining procedure, the traditional method of controlling the stripping ratio is to adjust the mining parameters of perforation, blasting, mining and transportation, and rock drainage. This method distributes the invalid stripping amount to different mining periods, and does not really Significantly reduce the amount of ineffective stripping. However, wh...

Claims

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Application Information

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IPC IPC(8): E21C41/28
CPCE21C41/28
Inventor 刘光伟李鹏曹博柴森霖李成盛王强孙有刚李彬韩阳付恩三赵景昌刘威董瑞荣宋群杜涵
Owner LIAONING TECHNICAL UNIVERSITY
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