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Mining method for upper coal seam of composite coal seam strip mine close-to-slope mining end slope

A mining method and technology for open-pit mines, which are used in surface mining, earth-moving drilling, underground mining, etc.

Active Publication Date: 2021-05-28
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a method for mining the upper coal seam of the composite coal seam open-pit coal seam by back mining, so as to solve or alleviate the problems in the above-mentioned prior art

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  • Mining method for upper coal seam of composite coal seam strip mine close-to-slope mining end slope
  • Mining method for upper coal seam of composite coal seam strip mine close-to-slope mining end slope
  • Mining method for upper coal seam of composite coal seam strip mine close-to-slope mining end slope

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[0045] The present application will be described in detail below with reference to the accompanying drawings and embodiments. Each example is provided by way of explanation of the application, not limitation of the application. In fact, those skilled in the art will recognize that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Accordingly, it is intended that the present application cover such modifications and variations as come within the scope of the appended claims and their equivalents.

[0046] Such as Figure 1 to Figure 8 As shown, the present invention discloses a method for mining the upper coal seam of a composite coal seam open-pit mine by side recovery mining. The mining method comprises the following steps:

[0047] Step S1, determining t...

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Abstract

The invention belongs to the technical field of strip mine mining, provides a mining method for an upper coal seam of a composite coal seam strip mine close-to-slope mining end slope, and provides a criterion for segmented recovery of the upper coal seam of the end slope. The first condition and the second condition of the feasibility of the end slope recovery of the coal resource pressing and covering at the upper coal seam transportation road position are provided, so that the feasibility of the end slope recovery of the coal resource pressing and covering at the upper coal seam transportation road position can be verified. According to the method, an operation space is formed by utilizing inner dump step dumping, excavation equipment is arranged, segmented recovery operation of end slope upper coal seam pressing and covering resources is carried out by utilizing an inner dump step working flat plate, and the upper coal seam and dirt bands between the coal seam and the mining level are mined together.

Description

technical field [0001] The application belongs to the technical field of open-pit mine mining, and in particular relates to a method for mining the upper coal seam of a composite coal seam open-pit coal seam by side-by-side mining. Background technique [0002] For composite coal seam open-pit mines, its annual output and stripping volume are generally large. In order to ensure the needs of material transportation, several transportation roads are generally reserved at the end side. For open-pit mines with an annual output of 10Mt and above, in order to meet the requirements of the side wall transportation, it is usually necessary to reserve multiple transportation roads on the side wall. Overburden resources cannot be extracted in time, and with the follow-up of internal dumps, it leads to a great waste of resources. [0003] Conventional composite coal seam side mining only targets the lower coal seam. After the lower coal seam is recovered by using the space at the botto...

Claims

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Application Information

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IPC IPC(8): E21C41/28
CPCE21C41/28
Inventor 曹博汪帅吕进国刘志龙刘宝华张子光白继元刘昆轮李思维高金龙蔡明祥
Owner LIAONING TECHNICAL UNIVERSITY
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