A method for directional danger relief in roadways with strong pressure in coal mines

A technology of strong mineral pressure and roadway, applied in mining equipment, earthwork drilling, safety devices, etc., can solve the problems of lack of strong mineral pressure conditions, inapplicability, etc.

Inactive Publication Date: 2016-01-13
UNIV OF SCI & TECH BEIJING +1
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  • Abstract
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Problems solved by technology

[0007] The above-mentioned strong mine pressure relief method is effective in coal mines where the vertical stress is greater than the horizontal stress, but it is not applicable to the situation where the horizontal stress is greater than the vertical stress. The method of controlling floor heave such as "Stone Pipe Pile Treatment of Soft Rock" (Patent No.: CN101886545B) is still lacking in strong mine pressure conditions

Method used

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  • A method for directional danger relief in roadways with strong pressure in coal mines
  • A method for directional danger relief in roadways with strong pressure in coal mines
  • A method for directional danger relief in roadways with strong pressure in coal mines

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0019] First, analyze the force of the roadway in principle

[0020] (1) Roadway cross section

[0021] The following is a detailed analysis of the force of the wedge body, and the force of the roadway is simplified as follows figure 1 As shown, at this time, drill holes with several diameters obliquely on the two side corners of the roadway, and take the cross-section of the roadway for analysis.

[0022] At this time, the force in the vertical direction is balanced, and there is

[0023] ( a + 2 b ) σ h = 2 b × m 2 σ ...

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Abstract

The invention proposes an oriented danger removing method for a high mine pressure roadway of a coal mine. According to the method, the mode that transverse (the cross section of the roadway) pressure relief and longitudinal (in the walking direction of the roadway) pressure relief are combined is adopted. A set of drill holes are arranged in the direction of the roadway at the interval of 5m, when the side pressure coefficient is larger than 1.5, a bottom plate can be extruded to move downwards after horizontal stress is decomposed on the drill holes in the side of the roadway, a bottom plate fracture area is formed through pressure relief blasting of the drill holes in the two sides so that stress transmitted from the deep portion of the base plate can be cut off, and development of a heaving floor is weakened; crushing belts are arranged in the roadway at certain intervals and have the functions of spring bodies, energy brought by the horizontal stress in the walking direction of the roadway is absorbed, and the heaving floor phenomenon of the roadway is solved fundamentally.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, including other deep underground operation safety fields, especially when strong mine pressure is encountered during operation, and the horizontal stress is much greater than the vertical stress (the lateral pressure coefficient is greater than 1.5). Background technique [0002] The prevention and control of strong mine pressure is mainly divided into monitoring, risk relief and support. Among them, the method of risk relief and pressure relief is the fundamental prevention and control method, which reduces the damage and impact of strong mine pressure on underground roadways from the source, and provides mine safety. Assure. [0003] In general, the protection principles of crisis relief and pressure relief are divided into the following categories: [0004] (1) The pressure relief of large-diameter drilling is to drill holes of more than 100mm in the two sides of the roadway and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F11/00
Inventor 王金安谢俊文卢熹上官科峰李鹏波杨世杰
Owner UNIV OF SCI & TECH BEIJING
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