Advance support method for coal mine tunnel high-risk area

A technology of advanced support and coal mine roadway, which is applied to tunnels, tunnel linings, temporary shields, etc., and can solve problems such as safety impact, roof fall, and construction difficulties

Inactive Publication Date: 2011-09-14
BIN COUNTY WATER CURTAIN CAVE COAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to extract coal, coal mines need to excavate a series of roadways leading to the underground. Due to the complex geological conditions at the construction site, during the construction of the roadway, if it encounters soft rock or water gushing areas, accidents of roof fall often occur. This area is called It is a high-risk area; this type of high-risk area brings great difficulties to normal construction and affects the safety level

Method used

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  • Advance support method for coal mine tunnel high-risk area
  • Advance support method for coal mine tunnel high-risk area
  • Advance support method for coal mine tunnel high-risk area

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Embodiment Construction

[0014] The technical solution will be further described below with reference to the accompanying drawings.

[0015] Such as figure 1 with figure 2 Shown, the supporting method of the present invention is as follows:

[0016] Step 1: In the excavation construction, first find out the scope of the roadway caving area, such as length, width and height, by means of drilling ahead, and then draw a map of the distribution range of the roadway caving area;

[0017] Step 2: Use a special drilling rig to construct and drill holes along the roadway contour line to the direction of excavation. The drill hole passes through the detected caving area or cavity area beyond 5 meters, and the drill pipe 1 is left in the borehole as a roadway excavation. temporary support;

[0018] Step 3: After each excavation cycle, use the waste drill pipe 2 to overlap the drill pipe 1 close to the wall of the roadway, and fix it with iron wire to become a temporary support roof;

[0019] Step 4: Under ...

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Abstract

The invention discloses an advance support method for a coal mine tunnel high-risk area. The advance support method comprises the following steps of: taking a drill rod as a temporary support during roadway excavation; attaching the waste drill rod to the wall surface of a tunnel, and overlapping on the drill rod, and fixing tightly by using an iron wire to form a temporary support shed cover; under the temporary support of the shed cover, constructing an injection pipe, injecting cement and water glass or other solidified materials into the high-risk area by using a special grouting machine to make a top plate of the high-risk area solidified into a whole, and meanwhile, building a stone room by using dressed stones and taking the stone room as a permanent support; and performing 1 to 1.5m small cycle operation, and repeating the steps 2 to 4 to pass through the high-risk area smoothly. The high-risk area is difficult to pass through by a normal support technology; drilling shed and grouting support technologies are used as the advance support, so the high-risk area can be passed through safely and efficiently.

Description

technical field [0001] The invention relates to a coal mine roadway supporting technology, which is suitable for the high risk area of ​​the coal mine roadway. Background technique [0002] In order to extract coal, coal mines need to excavate a series of roadways leading to the underground. Due to the complex geological conditions at the construction site, during the construction of the roadway, if it encounters soft rock or water gushing areas, accidents of roof fall often occur. This area is called It is a high-risk area; this type of high-risk area brings great difficulties to normal construction, and the safety level is affected. Contents of the invention [0003] In order to make the excavation pass through the caving zone smoothly, the present invention proposes an advance support method. [0004] The advanced support technical scheme of the present invention is: [0005] Step 1: In the excavation construction, first find out the scope of the roadway caving area, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D19/00
Inventor 刘永李琳朱树来李乃禄
Owner BIN COUNTY WATER CURTAIN CAVE COAL
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