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Supporting method of permeable soft broken rock stratum roadway

A technology for roadway support and rock formation, which is used in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as high cost and poor support effect, and achieve the effects of reasonable parameters, excellent support effect and strong adaptability.

Inactive Publication Date: 2014-02-26
张瀚
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of poor support effect and high cost of roadways in soft and broken rock formations, especially water seepage, soft and broken rock formations, the present invention proposes a method for roadway support in water seepage, soft and broken rock formations

Method used

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  • Supporting method of permeable soft broken rock stratum roadway
  • Supporting method of permeable soft broken rock stratum roadway

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Experimental program
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Embodiment Construction

[0022] The roadway supporting method of water seepage soft broken rock layer of the present invention comprises the following steps:

[0023] A. After the blasting of the roadway, knock on the roof to prevent the loose rock from falling and hurt the construction workers. The initial spraying concrete operation is carried out. The thickness of the initial spraying layer 5 is 20-30mm.

[0024] B. Use high-strength threaded steel anchor rod 1 and diamond-shaped metal mesh 6 joint support, the diameter of the anchor rod is 20mm, the length is 2500mm, the resin anchoring agent is used to anchor, the anchor length is 1400mm, and the row spacing between high-strength threaded steel anchor rods is average The axial deviation of the high-strength rebar anchor 1 located on the section of the roadway (that is, the angle between the axis of the high-strength rebar anchor 1 and the normal line of the tangent plane at the end of the anchor 1) does not exceed 10°, and each row and column A w...

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Abstract

The invention relates to a supporting method of a roadway in a coal mime, particularly to a supporting method of a permeable soft broken rock stratum roadway. The supporting method aims at solving the problems that soft broken rock stratum roadways especially permeable soft broken rock stratum roadways are poor in supporting effect, high in cost and the like. The supporting method comprises the steps of first concrete spraying; combined support through high strength deformed steel bar anchor rods and diamond metal nets; anchor cable installation; secondary concrete spraying; installation of chemical pulp grouting anchor rods; installation of cement slurry grouting anchor rods.

Description

technical field [0001] The invention relates to a support method for a roadway in a coal mine, in particular to a support method for a water seepage soft and broken rock layer roadway. Background technique [0002] In recent years, the level of underground mining in my country's coal mines has gradually deepened, the geological conditions have also changed from simple to complex, and there are more and more rock cracks and fault structures. The mine ground pressure and horizontal stress have increased significantly. Under the erosion of groundwater, the rock masses with bedding, joints and fissures are weakened, the overall strength and stability are greatly reduced, the self-supporting capacity of the roadway surrounding rock is reduced, the deformation of the roadway is increased, and the deformation duration is prolonged. Under such conditions, it is extremely difficult to support the roadway in the water seepage soft and broken rock formation, and to maintain the stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/10E21D20/02E21D21/00
Inventor 张瀚宋新龙任方涛李英明杨明东王晓东
Owner 张瀚
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