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Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall

A technology of concrete piers and concrete walls, which is applied in the direction of earthwork drilling, filling, safety devices, etc., can solve the problems of failure to achieve expected results, bending and deformation of single hydraulic props, and decline in the bearing capacity of roadside filling walls. Achieve the effect of simple structure and good stability

Inactive Publication Date: 2016-05-11
SHANDONG SHENBO ROADWAY SUPPORTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the way of erecting wooden point columns and single hydraulic props in the roadway cannot effectively prevent large-area fracturing chips on the side of the filling wall beside the roadway, the wooden point columns are split or broken, and the single hydraulic props are seriously bent and deformed, which leads to The load-bearing capacity of the filling wall at the side of the roadway is reduced, and it is easy to induce the damage and instability of the roadside support structure, which makes some mines fail to achieve the expected effect when applying the technology of retaining the roadway along the goaf in the fully mechanized caving face of thick coal seams, and even fail to retain the roadway

Method used

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  • Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall
  • Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall
  • Gob-side entry retaining method for GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and gangue concrete wall

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specific Embodiment approach

[0020] The method for the GFRP tube concrete pier column and the gangue concrete wall to retain the gob-side entry of the present invention, its preferred specific implementation mode is:

[0021] In the center of the side support body of the gob-side entry retaining, install FRP concrete piers at intervals of 2 to 3m, construct a support space by the side of the road with the pier of glass steel pipes as the center, and fill the gangue in the support space by the side of the roadway For the wall, both sides of the gangue wall are sealed with sprayed concrete, and fast-hardening cement slurry is injected into the gangue wall to make it cemented, and finally a lane with GFRP pipe concrete piers as the central skeleton and gangue cemented walls as auxiliary protection is formed. side support body.

[0022] When retaining the roadway, the fiberglass steel pipe concrete is used as the center, and the roadside support body space is constructed with steel strips, anchor rods and ste...

specific Embodiment

[0032] Taking the Φ400mm×14mm glass steel pipe filled with C60 concrete as an example, a roadside support body with a width of 2m and a height of 3m is simulated to be constructed, and the roadside support is supported by anchor mesh cables. The layout of the simulated working surface is as follows: figure 1 , the section of gob-side entry retaining is as follows figure 2 , the roadside support body such as Figure 3a , Figure 3b , the cross-section of the roadside support body is as follows Figure 4a , Figure 4b , Figure 4c .

[0033] Construction steps of support beside gob-side entry retaining:

[0034] The flow chart of the construction steps of the roadside support along the gob-side entry retention is as follows: Figure 5 shown.

[0035] As the coal mining face advances, a hydraulic support on the lagging face begins to work along the gob-side entry.

[0036] First, erect empty glass steel pipe piers along the edge of the working face, and add wooden board...

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Abstract

The invention discloses a gob-side entry retaining method for a GFRP (Glass Fiber Reinforced Polymer) tube concrete pier stud and a gangue concrete wall. A roadside supporting body which takes the GFRP tube concrete pier stud as a center framework and a gangue cement wall body as an auxiliary protection is finally formed by constructing a roadside supporting space which takes the GFRP tube concrete pier stud as the center, filling the roadside supporting space with the gangue wall body, spraying concrete onto the two sides of the gangue wall body for sealing, and injecting rapid hardening cement paste into the gangue wall body for cementing. The roadside supporting body is simple in structure, high in stability, and suitable for roadside supporting of a great depth and thick coal seam during gob-side entry retaining.

Description

technical field [0001] The invention relates to a coal mine roadway support technology, in particular to a method for retaining a roadway along a gob with a GFRP tube concrete pier column and a gangue concrete wall. Background technique [0002] Gobside retaining refers to the protection of the mining roadway behind the mined working face along the edge of the gob in a certain way, as the mining roadway of the next working face. Gobside entry retaining can not only cancel section protection coal pillars, recover resources to the maximum extent, and avoid coal loss, but also realize "Y" ventilation at the working face, fundamentally solving the problem of gas exceeding the limit at the working face. [0003] GFRP pipe is a glass fiber reinforced plastic pipe. It is a composite material that uses glass fiber and its products (glass cloth, tape, felt, yarn, etc.) as a reinforcing material and synthetic resin as a matrix material. This kind of glass steel pipe has the advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/04
CPCE21F15/04E21F15/005
Inventor 王军王正泽陈冰慧
Owner SHANDONG SHENBO ROADWAY SUPPORTING TECH CO LTD
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