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Dust-fall method for coal body in extra-thick fully-mechanized caving face through high-pressure water injection

A fully-mechanized caving face and coal body technology, which is applied in the field of high-pressure water injection and dust reduction for extra-thick fully-mechanized caving face coal bodies, can solve problems such as the lack of dust concentration control methods, and achieve significant dust reduction effects, reduced dust rates, and obvious effects

Inactive Publication Date: 2017-06-20
DATONG COAL MINE GRP
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Problems solved by technology

[0003] The invention solves the current problem of lack of methods for controlling the dust concentration during coal mining of extra-thick fully mechanized caving faces, and provides a method for high-pressure water injection and dust reduction of coal bodies of extra-thick fully mechanized caving faces

Method used

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  • Dust-fall method for coal body in extra-thick fully-mechanized caving face through high-pressure water injection
  • Dust-fall method for coal body in extra-thick fully-mechanized caving face through high-pressure water injection

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Embodiment Construction

[0014] The present invention is set forth below in conjunction with embodiment and accompanying drawing of specification sheet: the average coal seam thickness of the coal body working face of extra-thick fully mechanized caving face in a certain coal mine is 13m, the inclination length is 200m, and the strike length is 1000m, and the coal seam wetting radius is 12.5m. Caving coal mining technology for mining.

[0015] By adopting the method of high-pressure water injection and dust reduction for extra-thick fully mechanized caving face of the present invention, the following operation steps are implemented:

[0016] a. After the mining face is circled, construct the water injection hole 3 in the air inlet trough 1 and the return air trough 2, the hole diameter is φ65mm, the inclination length of the working face is 200, and the drilling depth is determined to be 150m; the average coal seam of the working face The thickness is 13m, and the drilling elevation angle is determine...

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Abstract

The invention relates to a dust-fall method for coal mining, in particular to a dust-fall method for a coal body in an extra-thick fully-mechanized caving face through high-pressure water injection. By adoption of the dust-fall method, the problem of lacking a method for controlling dust concentration in the process of mining the coal body in the extra-thick fully-mechanized caving face is solved. According to the scheme, the dust-fall method comprises the following steps that a, after a stope working face is circled, water injection holes are drilled in an inlet air forward groove and a return air forward groove of the stope working face, and included angles between the water injection holes and the forward grooves are 90 degree; b, the water injection holes are sealed through hole packers; and c, water is injected into the water injection holes through a water injection pump. The dust-fall method for the coal body in the extra-thick fully-mechanized caving face through high-pressure water injection has the advantages that (1) through water injection of the coal body in the extra-thick fully-mechanized caving face, dust production is eliminated from the source to the maximum extent, and thus the dust rate of the stope working face is effectively reduced; (2) through water injection of the coal body in the extra-thick fully-mechanized caving face, the temperature of the coal body in the stope range is effectively decreased and the spontaneous combustion control effect is obvious; and (3) the drilled water injection holes are arranged and designed reasonably, operation is easy, construction is convenient, and the dust-fall effect is remarkable.

Description

technical field [0001] The invention relates to a method for reducing dust in coal mine mining, in particular to a method for reducing dust by high-pressure water injection into a coal body in an extra-thick fully mechanized caving face. Background technique [0002] Fine coal dust in coal mines is one of the five natural disasters in mines. Coal dust is extremely harmful. It not only pollutes the working environment, affects the health of miners, and can cause miners to suffer from pneumoconiosis; when the concentration of coal dust and oxygen concentration reach A coal dust explosion can occur when there is a certain limit and an open flame, which is very harmful. Especially in modern high-yield and high-efficiency large-scale mines, fully mechanized caving back mining is commonly used in extra-thick coal seams, and the amount of coal dust generated during coal cutting and caving is as high as 1000-2000mg / m 3 . In this regard, after a lot of research at home and abroad, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/02
CPCE21F5/02
Inventor 于斌段宏飞葛锦臣王文强刘宝志梁民权顼熙亮
Owner DATONG COAL MINE GRP
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