Gas extraction device and method for preventing coal and gas outburst

Abstract

The invention discloses a gas extraction device and method for preventing coal and gas outburst. The gas extraction device comprises a device main body and a collecting tank, wherein an extraction outer pipe is arranged in the device main body, a hollow pipe is arranged in the extraction outer pipe, ventilation meshes are formed in the hollow pipe, a drilling rig is installed in the hollow pipe, a drilling bit is installed at the lower end of the drilling rig, a dust screen is installed outside the drilling bit, a leakage-proof silica gel pad is connected to the upper end of the extraction outer pipe, and a hose supporting ring is arranged in the leakage-proof silica gel pad. According to the gas extraction device and method for preventing coal and gas outburst, the leakage-proof silica gel pad can be attached to a hole through the outward acting force of a supporting spring, so that gas is always extracted in the extraction outer pipe during extraction; and meanwhile, the leakage-proof silica gel pad can be tightly attached to a discharging pipe through the upper end of the airflow acting force, so that gas leakage is avoided.

Description

technical field [0001] The invention relates to the technical field of gas drainage, in particular to a gas drainage device and method for preventing coal and gas outburst. Background technique [0002] Coal and gas outburst is a special type of gas gushing phenomenon, that is, under the action of pressure, a large amount of broken coal and gas are suddenly ejected from the coal body to the mining space. Coal and gas outburst is a powerful natural disaster in coal mine production. It seriously threatens the safety of coal mine production and is extremely destructive. There are omens before each outburst, but the types and times of omens are different. Familiarity with and mastering omens is of great significance for timely evacuation of personnel and reduction of casualties. [0003] The existing gas drainage device does not have a good structure to prevent coal and gas outburst, which leads to sudden coal and gas outburst, which seriously threatens the safe production of c...

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Problems solved by technology

[0004] The object of the present invention is to provide a gas extraction device and method thereof for preventing coal and gas outburst, to solve the problem that the existing gas extraction device proposed in the above-mentioned background technology does not prevent coal and gas outburst well, resulting in coal and gas outburst The outburst of gas outbursts seriously threatens the safe production of coal mines and causes injuries to workers, which cannot meet people's needs.

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