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Supporting and reinforcing structure of coal mine tunnel and construction technology thereof

A technology for coal mine roadway and construction technology, applied in tunnels, tunnel linings, mining equipment, etc., can solve problems such as only 0.05-0.1MPa, inability to adapt to the law of surrounding rock deformation, and unmatched construction of reserved deformation layers, to prevent Weathering, ease of implementation and promotion, and the effect of expanding the effective carrying range

Inactive Publication Date: 2013-07-10
PINGDINGSHAN TIANAN COAL MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The U-shaped steel shrinkable support has good cross-section and geometric parameters, and can be retracted after lapping. The disadvantage is that the support strength is only 0.05-0.1MPa, which cannot effectively control the deformation of the surrounding rock, and its shrinkage is limited. Destruction will occur under the amount of compression
The bearing capacity of the high-strength concrete arc plate support is twice that of the U-shaped steel support, but the cost is less than half of that of the U-shaped steel support. Adapt to the deformation law of surrounding rock

Method used

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  • Supporting and reinforcing structure of coal mine tunnel and construction technology thereof
  • Supporting and reinforcing structure of coal mine tunnel and construction technology thereof

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specific Embodiment 1

[0046] Application of the present invention in Minmetals of Pingdingshan Coal Industry Group:

[0047] 1. Construction brief introduction: Pingdingshan Coal Industry Group Minmetals Minmetals Jisan lower extended mining area has a total of five downhills, namely, the lower part of the belt dark inclined shaft, the track downhill, the belt downhill, the east wing return wind down the mountain, and the west wing return wind down the mountain bottom The deformation is serious and the support is in disrepair. Especially for the track extending down the mountain and the depot, the average lane repair cycle is one year, and the serious section cannot meet the needs of safe transportation in less than one year.

[0048] The main factors causing the damage of the track downhill in the No. 3 Mining Area of ​​Pingdingshan Coal Industry Group Mining Co., Ltd. are as follows:

[0049] (1) The surrounding rock of the roadway itself is relatively weak, and the roadway is arranged in ...

specific Embodiment 2

[0115] Application of the present invention in the eleventh mine of Pingdingshan Coal Industry Group:

[0116] 1. Project introduction: Since 2008, the 11th Mine of Pingdingshan Coal Industry Group has suffered serious convergence and deformation of the roadway. 2.5 meters, the actual width is 3.2 meters to 3.4 meters, and the outstanding performance of the roadway bottom drum is particularly serious; it has very prominently restricted the return air volume of the total return airway in the mining area, affecting safe production. In particular, we are deeply aware of the unequal horizontal stress in this area, which makes the approach of the upper side several times that of the lower side.

[0117] 2. The overall requirements for the support system to be established according to the site conditions:

[0118] a. Increase the intensity of replacing the bottom plate, and at the same time excavate the pressure relief groove at the bottom corner, increase the excavation of...

specific Embodiment 3

[0129] Application of the present invention in the first mine of Pingdingshan Coal Industry Group:

[0130] 1. Project introduction: With the continuous increase of mining depth, the conditions for mining resources are becoming more and more difficult. The problem of roadway support stability caused by deep mine mining is difficult to overcome, especially the large buried depth, complex structure and superimposed pressure under mining pressure, the roadway support is even more difficult. These pressures are caused by the difference in the speed of time, the magnitude and direction of the force, etc., so it is a combination of unequal time and uneven superimposed pressure. Under the action of this uneven superimposed pressure, the roadway support is often repeatedly damaged, so it is more and more difficult to keep the roadway support stable.

[0131]2. According to the site conditions, the support system is proposed and established: the loose composite surrounding rock mass w...

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Abstract

The invention discloses a supporting and reinforcing structure of a coal mine tunnel and a construction technology thereof. The supporting and reinforcing structure of the coal mine tunnel comprises a lane, wherein a grid-shaped reinforced layer is arranged on the inner wall of the lane, an anchor rod is arranged on the grid node portion of the reinforced layer, the inner end of the anchor rod is anchored in surrounding rock of the lane, and an anchor plate and a nut of the anchor reinforced layer are arranged at the outer end of the anchor rod. A concrete spraying layer covered on the reinforced layer and arranged at the outer end of the anchor rod is further arranged on the inner wall of the lane, a grouting anchor rod is arranged in the surrounding rock of the lane, an anchor cable is further arranged in the surrounding rock of the lane, the inner end of the anchor cable is anchored in the surrounding rock of the lane, and the outer end of the anchor cable is anchored on the outer side of the concrete spraying layer through a tray and a tensioning lock. The supporting and reinforcing structure of the coal mine tunnel integrates the surrounding rock of the lane in cementing mode with the initiative supporting theory as the guidance, prestress is reserved in the rock body, and stress is released and superimposed slowly, so that self integral strength and stability of soft rock and coal body are improved, the surrounding rock in a release ring of the lane can form a structure relatively homogenous and stable, and the aim of reinforcing and protecting the soft rock lane can be achieved within a long time.

Description

technical field [0001] The invention belongs to the technical field of geology and mining, and specifically relates to a coal mine roadway reinforcement technology, in particular to a method of cementing the surrounding rock of the roadway into a whole under the guidance of the concept of active support, leaving prestress in the rock body and slowing down the release of superimposed stress , and then continuously improve the overall strength and stability of the weak rock and coal body itself, so as to realize the coal mine roadway supporting structure and construction technology that strengthens and protects the weak rock roadway for a long time. Background technique [0002] With the continuous development of society and the continuous improvement of social energy demand, coal, as the main energy source, has an increasing demand. Therefore, with the continuous increase of coal mining volume and mining scope, coal mining conditions are becoming more and more difficult. Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D20/02E21D21/00
Inventor 涂兴子郭春生李明远李如波黄庆显车云立
Owner PINGDINGSHAN TIANAN COAL MINING
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