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Supporting method of super-large section cutting hole of large-mining-height fully mechanized mining face of thin base rock

A fully mechanized mining face with super large cross-section technology, which is applied in mining equipment, earthwork drilling, wellbore lining, etc., and can solve problems such as large thickness of overlying bedrock, large cross-section of open-cut hole, high pressure on the roof of open-cut hole and two gangs, etc. problems, to achieve the effect of preventing accidents of roof caving and side panels

Active Publication Date: 2017-07-11
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the large thickness of the overlying bedrock on the working face, the large cross-section of the cut hole, and the high pressure on the roof of the cut hole and the two sides, accidents of roof fall and chipping are prone to occur

Method used

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  • Supporting method of super-large section cutting hole of large-mining-height fully mechanized mining face of thin base rock
  • Supporting method of super-large section cutting hole of large-mining-height fully mechanized mining face of thin base rock
  • Supporting method of super-large section cutting hole of large-mining-height fully mechanized mining face of thin base rock

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Embodiment Construction

[0041] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0042] It is easy to understand that, according to the technical solution of the present invention, those skilled in the art can replace various structural modes and implementation modes without changing the essence and spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the invention.

[0043] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom that are mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings, and they are It is a relative concept, so it may change accordingly accord...

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Abstract

The invention discloses a supporting method of a super-large section cutting hole of a large-mining-height fully mechanized mining face of a thin base rock. The supporting method comprises the following steps: carrying out primary supporting, wherein the primary supporting comprises first branch supporting and second branch supporting, the first branch supporting is supporting a tunnel by utilizing anchor rods and metal meshes after the cutting hole is tunneled primarily, and the second branch supporting is supporting the tunnel by utilizing anchor rods and a plastic mesh after the cutting hole is expanded secondarily; carrying out primary pressure releasing: after the primary supporting is finished, releasing surrounding rock stress at a moment first pre-set time interval before secondary supporting; carrying out the secondary supporting: after the cutting hole is completely molded, supporting by utilizing an arch rope and a high molecular material for the secondary supporting. According to the supporting method disclosed by the invention, the primary supporting is carried out in a tunneling process of a cutting hole tunnel; after the primary pressure releasing is carried out, the secondary supporting is carried out after the cutting hole tunnel is completely molded, and initiative supporting is carried out by phases; the integrity of a surrounding rock with the cutting hole is maintained, and accidents of roof fall and nicking are effectively prevented from occurring.

Description

technical field [0001] The invention relates to the field of mine mining, in particular to a support method for a super-large cross-section cut hole in a fully mechanized mining face with a thin bedrock and a large mining height. Background technique [0002] The Shendong mining area spans the three provinces of Shanxi, Shaanxi and Mongolia. Due to the wide mining area, there are significant differences in the occurrence conditions and surrounding rock characteristics of different coal seams. The thickness of the rock ranges from 5 to 20m. Especially, the outstanding features of the opening of the working face are large cross-section and thin bedrock, which may cause potential safety hazards such as roadway roof caving and even water and sand collapse. The cross-sectional size of the super-large cut hole in the fully mechanized mining face with large mining height must meet the requirements for installing large equipment such as hydraulic supports, shearers, and scraper conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00E21D11/15E21D11/00E21D11/38
Inventor 张立辉王猛丁航刘兆祥魏广军
Owner CHINA SHENHUA ENERGY CO LTD
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