Method for uncovering outburst coal seam by using pseudo lithosphere on laneway

A technology for protruding coal seams and rock layers, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as affecting the normal production of mines, long construction period, and low coal penetration efficiency.

Active Publication Date: 2011-07-13
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
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Problems solved by technology

At the same time, the efficiency of uncovering and piercing coal is too low, and the construction period is long. Most of the time is spent on drilling and gas drainage, which seriously affects the normal production of the mine.

Method used

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  • Method for uncovering outburst coal seam by using pseudo lithosphere on laneway
  • Method for uncovering outburst coal seam by using pseudo lithosphere on laneway
  • Method for uncovering outburst coal seam by using pseudo lithosphere on laneway

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Embodiment Construction

[0017] combine figure 1 and figure 2 , the method provided by the present invention utilizes the pseudo-rock layer to expose the outburst coal seam on the roadway and comprises the following steps:

[0018] Step 201, when the predetermined distance to the coal seam to be excavated is reached, ear alleys 101 are made on both sides of the roadway, such as figure 1 shown. Preferably, the predetermined distance is 8-15 meters. In one embodiment of the present invention, the predetermined distance is 10 meters.

[0019] Step 202, drilling three circles of holes on a plane perpendicular to the entrance of the ear alley. In the direction outward from the center of the ear alley, the three circles of holes are respectively the inner layer hole 102, the middle layer hole 103, and the outer layer hole. 104. The density, quantity and size of holes in each circle can be set and adjusted according to specific construction applications. The inner hole 102 is mainly used for vibratory...

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Abstract

The invention discloses a method for uncovering an outburst coal seam by using pseudo lithosphere on a laneway. The method comprises the following steps of: drilling ear lanes on both sides of the laneway after reaching a position which is a certain distance away from a coal seam to be excavated; drilling three circles of drill holes on a plane vertical to the openings of the ear lanes, wherein the three circles of drill holes refer to inner layer holes, middle layer holes and outer layer holes respectively in a direction from the centers of the ear lanes to the outside; performing shock blasting and presplitting on at least one of the three layers of holes, so that fractures among corresponding layers of holes after shock blasting and presplitting can be communicated with one another; grouting into the middle layer holes to make the middle layer holes form pseudo lithosphere; and connecting the inner layer holes and the outer layer holes with a pumping device respectively. By adopting the method, the problems of long construction period and poor safety in the prior art are solved.

Description

technical field [0001] The invention relates to a method for exposing a protruding coal seam by using a pseudo-rock layer on a roadway. Background technique [0002] The mechanism of coal and gas outburst is mainly as follows: the coal seam contains high-pressure gas gas, which is sealed in the underground entity, and the roadway is excavated to provide a free release space for high-pressure gas during excavation, and a large amount of coal rock and toxic gas ( gas). From a scientific point of view, it means that the tunneling roadway and the rock around the coal seam are not strong enough to provide a free surface and release space for the release of high-pressure gas contained in the coal seam. [0003] Due to the large gas content and high gas pressure in coal seams with high gas outburst mines, there are hidden dangers in coal mining. It makes the mine roadway layout avoid coal uncovering and coal penetration, and restricts the mine roadway layout. At the same time, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B7/04E21B43/263E21D11/00E21D9/14
Inventor 韩雪峰
Owner CHNA ENERGY INVESTMENT CORP LTD
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