Gas drainage system for high-gas-content coal mine

Abstract

The invention provides a gas drainage system for a high-gas-content coal mine, and belongs to the technical field of gas coal mine collection. An operation platform and a pump are arranged on the ground; the operation platform is connected with the pump through a connecting line; a warning device is arranged on the operation platform; the output end of the pump is communicated with a horizontal well through a pipeline; the horizontal well is arranged under the ground; a controller is arranged at a connecting part of the pipeline and the horizontal well; the output end of the controller is connected with a gas sensor; the gas sensor is arranged in the horizontal well; the input end of the controller is connected with a power supply box; and the power supply box is arranged in the pipeline. The gas drainage system for the high-gas-content coal mine has the advantages that a vacuum pump is arranged on the ground and extends into a wellhead of the horizontal well for performing gas drainage on the horizontal well; therefore the gas drainage is not performed under the ground; the underground construction risk is avoided; and the construction safety is improved. Further, the horizontal well is arranged in a fissure zone; and the gas concentration in the fissure zone is high, so that the gas drainage efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of gas coal mine collection, in particular to a gas drainage system for high gas coal mines. Background technique [0002] According to mining theory, with the mining of coal, the overlying strata of the mining face will form caving zones, fissure zones and curved subsidence zones from bottom to top. Caving zone: temporarily supported by supports in the stope, has collapsed in the goaf, arranged regularly or irregularly, and the height is generally 3 to 4 times the mining height; fissure zone: although it has been broken into blocks, it is still neatly arranged , which is about 15 times the mining height, and the fissures are well developed, which is an important area to prevent water seepage accidents. Curved subsidence zone: The rock formation is less disrupted, resulting in the formation of a subsidence basin at the surface. The strong fracture zone at the lower part of the caving zone and the fracture ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a gas drainage system for high-gas coal mines, so as to solve the safety hazards caused by the extraction of gas in the caving zone of existing high-gas coal mines

The invention can also solve the problem of low gas extraction efficiency

The present invention can also solve the problem that the prior art cannot extract gas in a long-term and stable manner

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