Even-grouting structure of coal mine tunnel and construction technology thereof

A technology of coal mine roadway and construction technology, applied in tunnels, tunnel linings, mining equipment, etc., can solve problems such as huge cost, unstable support structure, and impact on coal mine production, so as to improve integrity and bearing capacity and expand effective bearing capacity Scope, ease of implementation and effectiveness of scaling up

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

In the past, masonry, metal brackets, anchor rods, and anchor cables were generally used to solve the roadway support problem, but because these support methods are all surface support, they cannot fundamentally solve the texture of the surrounding rock loose circle of the roadway and the surrounding rock. The state of stress causes the support structure to be unstable, the service life is short, and there are great safety hazards, which directly affect the normal coal mine production
And most of the roadways are affected by the above, making it more difficul

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  • Even-grouting structure of coal mine tunnel and construction technology thereof

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specific Embodiment 1

[0044] Application of the present invention in Minmetals of Pingdingshan Coal Industry Group:

[0045] 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.

[0046] 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:

[0047] (1) The surrounding rock of the roadway itself is relatively weak, and the roadway is arranged in ...

specific Embodiment 2

[0113] Application of the present invention in the eleventh mine of Pingdingshan Coal Industry Group:

[0114] 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.

[0115] 2. The overall requirements for the support system to be established according to the site conditions:

[0116] 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

[0127] Application of the present invention in the first mine of Pingdingshan Coal Industry Group:

[0128] 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.

[0129] 2. According to the site conditions, the support system is proposed and established: the loose composite surrounding rock mass ...

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Abstract

The invention discloses an even-grouting structure of a coal mine tunnel and a construction technology thereof. The even-grouting structure of the coal mine tunnel comprises a lane, wherein a concrete spraying layer is arranged on the inner wall of the lane, a grouting anchor rod for filling reinforcing slurry into surrounding rock so as to form a reinforcing assembly arch on the outer side of the lane is arranged in the surrounding rock of the lane, the inner end of the grouting anchor rod is communicated with a crack in the surrounding rock of the lane, the outer end of the grouting anchor rod protrudes out of the concrete spraying layer, grouting anchor cables are further arranged at the top of the lane and in the surrounding rock on two sides of the lane, one end of each grouting anchor cable is anchored in the surrounding rock, and the other end of the grouting anchor cable is anchored on the outer side of the concrete spraying layer. Slurry is filled in cracks in the surrounding rock of the lane for reinforcing, the grouting is performed according to the softness and broken degree and the crack development degree of the rock, and repeated reinforcing and cementing are performed, so that cohesion and inner friction angles of the surrounding rock can be fundamentally changed, the surrounding rock in a broken rock zone of the lane can be in a relatively homogeneous and stable state, and the reinforcing assembly arch even in stress is formed on the outer side of the lane.

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 reinforcing loose surrounding rock mass by injecting grouting material matching the surrounding rock mass into the surrounding rock mass on the outside of the roadway, so as to reduce loose and weak rock mass. The rock and coal mass is cemented into a whole, so that the reinforced surrounding rock loose rock mass forms a stress that tends to be evenly distributed, the properties of the surrounding rock tend to be homogeneous, and the structure of the surrounding rock tends to be stable as a whole. The surrounding rock outside the roadway forms a reinforcement combination. Uniform grouting structure and construction technology of arched coal mine roadway. Background technique [0002] With the continuous development of society and the continuous improvement of social energy demand, coa...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D20/02
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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