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Method for controlling goaf air leakage in exploitation process of shallow buried close-range coal seam

A technology of mining process and control method, which is applied in auxiliary non-electrical fluid pressure control, by detecting the appearance of fluid at the leakage point, mining equipment, etc., can solve problems such as shortage, unsatisfactory, and spontaneous combustion of leftover coal in goafs. Achieve the effects of strong practicability, high reliability, safe and efficient mining

Inactive Publication Date: 2017-04-26
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

However, due to the lack of a set of reasonable and standardized steps in the implementation of these methods, the method of suppressing coal spontaneous combustion by controlling air leakage is not ideal, and the problem of coal spontaneous combustion in gobs still occurs from time to time

Method used

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  • Method for controlling goaf air leakage in exploitation process of shallow buried close-range coal seam
  • Method for controlling goaf air leakage in exploitation process of shallow buried close-range coal seam

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Embodiment Construction

[0022] specific implementation plan

[0023] figure 1 Shown is a flow chart of the present invention for implementing a method for comprehensive air leakage control in gobs during shallow-buried and close-distance coal seam mining. The present invention will be further described below in conjunction with examples.

[0024] Implementation background: The burial depth of the 12-coal coal seam in the third panel area of ​​a mine is 96-233m, the minimum thickness of the coal seam is 1.95m, the maximum is 8.03m, and the average is 5.4m. The No. 12 coal in the three panel area began to be mined in 1999, and the mining was completed in 2007. A total of 6 fully mechanized mining working faces were arranged in the panel area, with a cutting height of 3.6m and a thickness of 2.9m for the remaining top coal. The supporting 5m supports were used for mining along the coal seam floor , the average recovery height is 4.6m, and the distance between the 12th coal seam and the 22nd coal seam i...

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Abstract

The invention provides a method for controlling goaf air leakage in the exploitation process of a shallow buried close-range coal seam. The method mainly comprises technologies such as plugging of earth surface air leaking fractures and detecting and plugging of downhole air leaking channel, namely, first, the widths of earth surface mining-induced fractures are measured and the speed of fracture air leaking is calculated; the fractures with the widths and the air leaking air speeds being out of gauge are plugged, an air inlet roadway and an air outlet roadway which are difficult to cave by a roof in a goaf is caved by a manual way, and air leaking toward the goaf is reduced; next, a beam tube monitoring system is used for monitoring the concentration of O2 in the goaf, and whether air leaking exists or not in the goaf is judged according to the concentration of O2; then, a tracer gas method is used for detecting air leaking channels of downhole coal pillars, the air inlet roadway, the air outlet roadway and the like, and corresponding plugging measures are adopted; and at the time of plugging, a fan-air-window combined pressure regulating method is used for balancing air pressure of the goaf and a working face, goaf air leaking is reduced, and coal spontaneous combustion in the goaf is avoided.

Description

technical field [0001] The invention relates to a method for controlling air leakage in a goaf during coal seam mining, in particular to a method for controlling air leakage in a gob during shallow-buried coal seam mining. The invention belongs to the technical field of leak prevention and fire extinguishing in coal mines, and is a comprehensive control method for air leakage in goafs which combines surface leak stoppage technology with underground leak stoppage technology. [0002] technical background [0003] The coal left in the goaf after mining in the mine is prone to spontaneous combustion under the condition of continuous oxygen supply in the working face and the cracks in the overlying coal and rock mass. Spontaneous combustion of coal incomplete combustion will produce a large amount of CO, C 2 h 6 and other harmful gases, causing the concentration of harmful gases underground to exceed the standard, affecting the normal production of coal mines. In addition, in ...

Claims

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Application Information

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IPC IPC(8): E21F15/00G05D16/18G05D16/16G01M3/20
CPCE21F15/005G01M3/20G05D16/16
Inventor 秦波涛卓辉史全林马东宋爽王俊高原侯晋
Owner CHINA UNIV OF MINING & TECH
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