Method for preventing and controlling gas outburst

A gas outburst and gas outburst technology, which is applied in the fields of safe production and gas outburst prevention, can solve the problems that threaten the life safety of underground miners and economic losses, and achieve the effect of avoiding the risk of gas combustion and explosion, avoiding gushing, and convenient and accurate detection methods

Inactive Publication Date: 2014-02-12
唐山市宏强机械厂
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  • Claims
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Problems solved by technology

[0003] At present, coal and gas outburst accidents are still the main disasters in mines in the world. Once an outburst occurs, it will seriously threaten the life safety of underground miners and cause huge economic losses.

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  • Method for preventing and controlling gas outburst
  • Method for preventing and controlling gas outburst
  • Method for preventing and controlling gas outburst

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Embodiment Construction

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0035] Through the analysis of a large number of outburst accidents and outburst site conditions, the present invention finds through simulation experiments that the truth of gas outburst that has plagued the world's mining industry for more than 100 years is that the shell of the coal seam that is the same age as the coal seam exists in an irregular curve. The capsule-shaped body in the shape of a duck egg or duck egg will have a physical explosion hazard if the depth of occurrence is more than 30m from the ground surface (the internal pressure reaches more than 0.75MPa).

[0036] Gas capsules may exist in multiple coal seams and multiple mines, and the distribution is irregular, randomly hidden in the relatively thick or suddenly thickened coal seams...

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Abstract

A gas outburst prevention and control method, comprising: drilling a detection hole on the coal wall surface of a tunnel; acquiring a first pressure value of the coal wall surface and a second pressure value of the bottom of the detection hole; if the result obtained after subtracting the second pressure value from the first pressure value is greater than a preset threshold, then the site of the detection hole is a dangerous area having a gas pocket; drilling into the gas pocket in the dangerous area with an auger stem; after drilling to a predetermined depth in the gas pocket, stopping the feed of the auger stem and fixing the position; conveying gas and coal dust in the gas pocket into a coal-gas separator via the rotation of the auger stem; the coal-gas separator discharges the coal dust via a coal dust discharge pipe, and discharges the gas into an exclusive pumping pipe or a return airway via a gas discharge pipe. The present method can simply, accurately, reliably and efficiently detect a gas pocket in a coal bed, and eliminate the hidden danger of a physical explosion, thus avoiding harm to miner lives and properties caused by a gas outburst.

Description

technical field [0001] The invention relates to safety production technology in the field of coal mining, in particular to a method for preventing and controlling gas outburst. Background technique [0002] Coal and gas outburst means that in coal mining operations in coal mines, under the action of pressure difference, a large amount of broken coal and gas are suddenly ejected from the coal seam body to the mining space, which is another type of special gas gushing out. Phenomenon. It is extremely destructive. [0003] At present, coal and gas outburst accidents are still the main disasters in the world's mines. Once an outburst occurs, it will seriously threaten the life safety of underground miners and cause huge economic losses. Since 1834, the world's first coal and gas outburst occurred in the Iac Mine of the Roua Coalfield in France. Up to now, China, France, the former Soviet Union, Poland, Japan, Hungary, the United States, India, South Africa and other 22 countri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00
CPCE21F7/00E21B49/003
Inventor 陈凤平韩国伟曹海华
Owner 唐山市宏强机械厂
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