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System and method for detecting goaf air leakage under gob-side entry retaining mining in real time

A technology of real-time detection and air leakage, which is applied in the direction of detecting the appearance of fluid at the leakage point, measuring devices, and using liquid/vacuum degree for liquid tightness measurement, etc., which can solve the problem of long detection time and the inability to obtain the underground goaf as soon as possible Air leakage in the area, large manpower consumption and other problems, to save manpower, realize unmanned operation start, and reduce production costs

Pending Publication Date: 2021-02-12
TAIYUAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0003] The management of air leakage in the goaf is an important link to prevent coal spontaneous combustion in the goaf. When the wind speed of the air leakage in the goaf is 0.12m / min, it cannot be measured with various existing anemometers.
Tracer gas such as SF 6 There is no pathological reaction to the human body within 24 hours. Under the condition of an atmospheric pressure, the solubility in water at 25°C is extremely small, and the materials encountered in the mine are harmful to SF 6 No significant adsorption, SF 6 It has good thermal stability and chemical inertness; the existing detection of air leakage in gobs consumes a lot of manpower and takes a long time to detect. Lo

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  • System and method for detecting goaf air leakage under gob-side entry retaining mining in real time
  • System and method for detecting goaf air leakage under gob-side entry retaining mining in real time
  • System and method for detecting goaf air leakage under gob-side entry retaining mining in real time

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] Such as Figure 1~4 As shown, the present invention discloses a system for real-time detection of air leakage in gobs under goaf mining. The system performs data transmission in a wireless manner, including a tracer gas release device 5, a detection tracer gas release device 5 and a working The laser distance measuring device 6 for the distance between the planes 2, the ground controller and several tracer gas collection and detection devices, the tracer gas release device 5 and the laser rangefinder 6 are installed at the same position in the air inlet lane 1, and the tracer gas release The distance between the installation position of device 5 and laser distance measuring device 6 and working face 2 is 25 to 35 meters. Laser ranging device 6 can detect the distance between tracer gas release device 5 and working face 2 in real time. The tracer gas ca...

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Abstract

The invention belongs to the technical field of underground coal mine ventilation. Goaf air leakage is a nature important link of coal of an existing goaf, however, existing goaf air leakage amount detection is large in manpower consumption and long in detection time, the underground goaf air leakage situation cannot be obtained as soon as possible, goaf management cannot be judged in time. The invention provides a system and method for detecting goaf air leakage under gob-side entry retaining mining in real time. Tracer gas is released in a goaf, mixed gas of the goaf is collected and detected, the contained tracer gas is detected and analyzed, data is transmitted to a ground control system, sound-light alarm is triggered when the air leakage reaches a set threshold value; the installation positions and serial numbers of tracer gas release devices are adjusted according to advancing of a working face, unmanned operation starting is achieved, manpower is saved, the safety in the production process is improved, and the production cost is effectively reduced.

Description

technical field [0001] The invention relates to the detection of air leakage in a goaf of an underground gob-side entry in a coal mine, and more specifically, relates to a system and method for real-time detection of the air leakage in a goaf of a gob-side entry. Background technique [0002] Under the technical conditions of gob-side entry retaining without coal pillars, since the side section of the retaining entry is the caving zone of the goaf, the goaf is completely exposed in the entryway, forming a completely open state, which is different from that of the traditional mining technology. Compared with the situation of airtight sealing goaf, the gob is not completely closed, and different ventilation methods and different air volume ratios of the same ventilation method have an important impact on the air leakage, gas emission and spontaneous combustion of the goaf. [0003] The management of air leakage in gobs is an important link to prevent coal spontaneous combustio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/04G01N33/00G01B11/02
CPCG01M3/04G01N33/0004G01B11/02
Inventor 王飞郝光祖侯水云高亚斌李子文刘振明闫晶晶焦治平王俊虎刘睿
Owner TAIYUAN UNIV OF TECH
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