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Method for preventing gas explosion of driving face in coal mine

A technology for excavating working face and gas explosion, which is applied in gas emission, mining equipment, earth-moving drilling, etc., to achieve the effect of protecting health, saving electricity costs, and having a good return air effect.

Inactive Publication Date: 2010-12-15
安艾江
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for preventing and controlling gas explosion in coal mine excavation working face in order to solve the problem of gas control in tunnel and working face

Method used

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  • Method for preventing gas explosion of driving face in coal mine
  • Method for preventing gas explosion of driving face in coal mine
  • Method for preventing gas explosion of driving face in coal mine

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specific Embodiment 1

[0016] Specific embodiment 1, such as figure 1 , 1a As shown, the two-layer structure is an inner and outer layer structure, the inner layer is the air inlet tunnel 7, which is a semi-circular arch or trapezoidal structure, and the outer layer is the return air tunnel 8. The shape of the excavation roadway entrance is a semicircular arch, the specification is 1.8 meters wide and 1.8 meters high, and if it is trapezoidal, the bottom width is 2 meters, the top height is 1.8 meters, and the top width is 1.8 meters; when the excavation reaches about 20 meters, it will increase to a semicircular arch The shape is 3.5 meters wide and 3.5 meters high. The bottom width of the trapezoid is increased to 3.5 meters, the top width is increased to 2.5 meters, and the height is 3.5 meters. Then start to build the isolation layer, and at the same time open the return air roadway mouth 2 on the outer coal wall (connection roadway can also be used), this roadway leads to the return air road; ...

specific Embodiment 2

[0017] Specific embodiment 2, such as figure 2 , 2a As shown, the described two-layer structure is an upper and lower structure, and the lower floor is the air inlet roadway 7, and the upper floor is the air return roadway 8; the height of the tunnel opening is 1.8 meters and the width is 3.5 meters. When the tunneling reaches about 20 meters Increase the height to 3.5 meters, and start to construct the isolation layer to divide the roadway into upper and lower parts. At the same time, open the return air roadway opening 20 meters from the coal wall on the right side of the upper layer. , The space distance between the end of the upper and lower ventilation isolation layers and the gas dilution point and the front coal wall and roof of the coal mining face is not more than 0.5 meters. For every 5 meters of excavation, the isolation layer will be followed up by 5 meters in time.

specific Embodiment 3

[0018] Specific embodiment 3, such as image 3 , 3a As shown, the two-layer structure is a left-right structure, one side is the air inlet tunnel 7, and the other side is the return air tunnel 8. Start to excavate the entrance of the roadway, with a height of 4 meters and a width of 2 meters. When the excavation reaches about 20 meters, it will be widened to 4 meters, and the isolation layer will be built to divide the roadway into two parts. The entrance of the wind tunnel (connecting lane can also be used), which leads to the return air lane, and the space distance between the ends of the ventilation isolation layer of the left and right lanes and the gas dilution point and the front coal wall and side coal wall of the coal mining face Greater than 0.5 meters, the left and right roadway ventilation isolation layers follow up in time with the excavation according to a certain distance to ensure continuity.

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Abstract

The invention relates to a gas treatment technology, in particular to a method for preventing gas explosion of a driving face in a coal mine, which is used for solving the problem of treating gas in a driving tunnel and a working face. In the method, a tunnel is always divided into two layers of one air inlet tunnel and one air return tunnel by adopting a measure of continuously arranging an isolating layer to follow the schedule of the coal wall in front of the driving face. Compared with the prior art, the tunnel is divided into two layers of one air inlet tunnel and one air return tunnel, the air inlet tunnel is relatively closed without generating gas accumulation, and the personnel and equipment can safely work in the air inlet tunnel.

Description

technical field [0001] The invention relates to a gas control technology, in particular to a method for preventing and controlling gas explosions in coal mine excavation working faces. Background technique [0002] At present, the measures to prevent and control gas explosions in the excavation working face of domestic coal mines are mainly to use press-in ventilation to dilute the gas concentration in the working face so as to keep it within a safe range. The change. These methods are effective in theory, but many problems have been found in actual production, such as the control of fire sources. We can take various measures to control the generation of sparks, such as adopting various explosion-proof electrical equipment, but some accidents The source of the fire is indeed difficult to control. These accidental ignition sources are also an important factor in the occurrence of gas explosions. The existing equipment for real-time monitoring and monitoring of gas concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 安艾江
Owner 安艾江