Cooperative anchoring structure for enhancing stability of gob-side entry driving coal pillar and construction method

An anchoring structure and construction method technology, which is applied in the installation of bolts, earthwork drilling, shaft equipment, etc., can solve the problems of failing to meet the requirements of roadway safety and stability, and achieve effective protection of coal pillars, realization of coal mine safety, and reduction of roadways. deformation effect

Pending Publication Date: 2022-07-05
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a collaborative anchoring structure and construction method to enhance the stability of coal pillars in gob-side excavation, so as to solve the problem that the existing anchoring structure cannot meet the safety and stability requirements of the roadway

Method used

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  • Cooperative anchoring structure for enhancing stability of gob-side entry driving coal pillar and construction method
  • Cooperative anchoring structure for enhancing stability of gob-side entry driving coal pillar and construction method
  • Cooperative anchoring structure for enhancing stability of gob-side entry driving coal pillar and construction method

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Embodiment 1

[0038] An embodiment of the present invention, such as Figure 1 to Figure 5 As shown, a construction method of a coordinated anchoring structure for enhancing the stability of a gob-gob coal pillar is disclosed, comprising the following steps:

[0039] Step 1: During the excavation of the A-side C roadway, the anchor net 6 is laid under the C roadway.

[0040] When arranging the roadway on the working face of the coal mine, when excavating the roadway on the A side and the C roadway, the roadway is driven along the roof of the coal seam. When the thickness of the coal seam is higher than 1500mm, the height of the lower part of the C roadway is consistent with the thickness of the coal seam; when the thickness of the coal seam is less than 1500mm, the excavation depth of the lower part exceeds the bottom plate to meet the normal use requirements of the roadway.

[0041] During the excavation of the roadway, the anchor mesh 6 is laid at the same time, and the anchor mesh 6 is ...

Embodiment 2

[0077] An embodiment of the present invention, such as Figure 1 to Figure 5 As shown, a coordinated anchoring structure for enhancing the stability of coal pillars in gob-side driving is disclosed, including a first anchor cable 1, a protective sleeve 2, a first steel belt 4, a second steel belt 11 and an anchor net 6. The nets 6 are laid on both sides of the coal pillar, the first anchor cables 1 are drilled and mounted on the coal pillar, and the exposed parts of the multiple first anchor cables 1 located on the same end face are connected by the first steel belt 4 in the exposed part of the lower side of the C roadway. , the exposed part of the upper part of the D roadway is interlocked by the second steel belt 11 .

[0078] In this embodiment, by interlocking and anchoring the lower side of the roadway on the A side and the upper side of the roadway on the B side, the double tension of the first anchor cable and the coordination of the pre-tightening force can be realized...

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Abstract

The invention relates to a collaborative anchoring structure for enhancing the stability of a gob-side entry driving coal pillar and a construction method, belongs to the technical field of gob-side entry driving coal pillar retaining mining, and solves the problem that an existing anchoring structure cannot meet the safety and stability requirements of a roadway. The construction method of the collaborative anchoring structure for enhancing the stability of the gob-side entry driving coal pillar comprises the steps that after an anchor net on the lower side of a roadway is laid, a first anchor cable is drilled; after drilling of a row of first anchor cables in the height direction of the lower side of the C roadway is completed, a first steel belt is used for interlocking the multiple first anchor cables in the row; in the tunneling process of the B face D roadway, the first anchor cable is installed to be located at the exposed end of the upper side of the D roadway. According to the collaborative anchoring structure for enhancing the stability of the gob-side entry driving coal pillar and the construction method, interlocking anchoring is carried out on the lower side of the roadway C on the A face and the upper side of the roadway D on the B face, two-time tensioning of the first anchor cable and cooperation of the first anchor cable and the second anchor rod on the pre-tightening force are achieved, and the strength and the bearing capacity of the coal pillar can be obviously enhanced.

Description

technical field [0001] The invention relates to the technical field of coal pillar mining in gob-side driving, in particular to a coordinated anchoring structure and a construction method for enhancing the stability of gob-side driving coal pillars. Background technique [0002] When arranging the roadway in the working face of the coal mining area, the gob gob is to drive the next working face (abbreviated as B) completely along the edge of the gob of the previous working face (referred to as A face, the same below) or only leaving a narrow coal pillar. In general, narrower coal pillars are selected as the roadway to enhance the stability of the roadway. Specifically, the mining roadway on the B side is arranged in the low stress field on the side of the coal pillar, which is convenient for roadway maintenance and reduces the amount of deformation. The key is to control the coal pillar width and stability. [0003] The purpose of leaving small coal pillars is to isolate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/15E21D20/00E21D21/00
CPCE21D9/00E21D11/152E21D20/003E21D21/0093E21D21/0033
Inventor 龙景奎鲜扬曹佐勇乞朝欣陶笑兰红徐文发许俊峰田唯标张由飞杜恒安禹波余文凯贾波
Owner CHINA UNIV OF MINING & TECH
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