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Supporting method for narrow coal pillar in gob-side entry driving

A narrow coal pillar and coal wall technology, which is applied in the direction of earthwork drilling, mining equipment, bolt installation, etc., can solve the problem that narrow coal pillars cannot guarantee the stability of narrow coal pillars, and achieve the improvement of overall support strength and wide practicability , to ensure the effect of stability

Inactive Publication Date: 2020-12-25
XISHAN COAL ELECTRICITY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing support methods for narrow coal pillars cannot guarantee the stability of narrow coal pillars, the present invention provides a new type of support method for narrow coal pillars in gob-side roadway

Method used

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  • Supporting method for narrow coal pillar in gob-side entry driving
  • Supporting method for narrow coal pillar in gob-side entry driving

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Experimental program
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Effect test

Embodiment Construction

[0012] A support method for narrow coal pillars in gob-side entry is realized by the following steps:

[0013] 1) Determine the width a of the reserved narrow coal pillar 1 according to the law of surface movement;

[0014] 2) Excavate in the section entry 4 of the adjacent section of the goaf 3. After the excavation is completed, the coal wall on the side of the reserved narrow coal pillar 1 close to the goaf 3 needs to be supported: firstly, in the reserved Anchor cable holes are drilled one by one on the coal wall of the narrow coal pillar 1 near the goaf 3, and the anchor cable holes pass through the reserved narrow coal pillar 1 along the width direction of the reserved narrow coal pillar 1 and extend to the reserved The length of the extension part is L, and then the anchoring agent 6 is sent into the bottom of the anchor cable hole one by one, and then one end of the anchor cable 5 is inserted into the bottom of the anchor cable hole, and the other end of the anchor cab...

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Abstract

The invention relates to the technical field of gob-side entry driving, in particular to a supporting method for narrow coal pillar in gob-side entry driving. In order to solve the problem that a narrow coal pillar supporting method in the prior art cannot guarantee the stability of a narrow coal pillar, the invention provides the novel supporting method for the narrow coal pillar in gob-side entry driving. The supporting method comprises the steps that an anchor cable is constructed on a gateway of coal face zones of adjacent zones, the anchor cable penetrates through the other side of the reserved narrow coal pillar, and meanwhile the end, close to a goaf side, of the anchor cable is anchored; gob-side entry driving is carried out after stoping of coal faces of the adjacent zones is completed and an overlying rock layer is stabilized, one end of the anchor cable on the other side of the narrow coal pillar is exposed and anchoring agents and coal briquettes are cleaned in the drivingprocess, and a tray and a lock are sequentially installed to conduct tensioning. The supporting method is simple, convenient and fast to operate, anchor cables do not need to be rearranged on one sideof the narrow coal pillar in gob-side entry driving, and supporting materials and construction time are saved.

Description

technical field [0001] The invention relates to the technical field of gob-side entry, in particular to a method for supporting narrow coal pillars in gob-side entry. Background technique [0002] In recent years, due to the increase of mine mining intensity and the rapid extension of mining depth, the relationship between mining is generally tense. The mining method has gradually changed to large mining height and fully mechanized caving mining. Coal seams, three-soft coal seams, high ground stress and other gob-side roading under complex geological conditions are increasing. Goaf entry refers to the excavation of a roadway along the edge of the goaf or a very narrow coal pillar. Stability issues with narrow coal pillars. Research and practice show that the stability of narrow coal pillars plays a decisive role in the maintenance of surrounding rock in gob-side entry. At present, anchor rods (cables) are often used for support of narrow coal pillars. The support of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/02
CPCE21D20/02
Inventor 孙春生董东张风奎韩志勇李保存王帅刘文文李海涛王鹏飞
Owner XISHAN COAL ELECTRICITY GRP
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