Coal and gas outburst prevention and control method

By constructing directional drilling at the tunnel excavation face and combining it with pressure relief, pressure reduction, and pressure resistance measures, the problem of preventing coal and gas outbursts was solved, the gas content of the coal body was reduced, and the pressure resistance of the coal body was improved, thus ensuring safe production in the coal mine.

CN117432459BActive Publication Date: 2026-06-12SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANXI LUAN ENVIRONMENTAL ENERGY DEV CO LTD
Filing Date
2023-11-23
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing technologies, the prevention and control measures for coal and gas outbursts are too simplistic, resulting in insignificant outburst prevention effects and making it difficult to effectively address the safety threats posed by high-gas and coal and gas outburst mines.

⚗Method used

The method combines regional and local outburst prevention. Directional drilling is carried out at the roadway excavation face to depressurize, reduce pressure, and strengthen the coal seam, including depressurization and permeability enhancement, gas extraction, and coal body reinforcement. Hydraulic fracturing and gas phase fracturing technologies are used, combined with stress-strain and gas concentration sensors for real-time monitoring and adjustment.

🎯Benefits of technology

It significantly reduces the gas content in coal seams, eliminates stress concentration in front of the tunnel excavation face, enhances the coal body's resistance to outbursts, avoids coal and gas outburst accidents, and ensures safe production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application provides a coal and gas outburst prevention and control method, comprising the following steps: using a directional drilling machine to construct multiple drill holes at the face of a roadway driving operation, and arranging the trajectories of the drill holes in the middle of a coal seam; after the drill holes are formed, selecting a middle drill hole to "unpressurize" the coal seam, and sending a pressure relief device into the middle drill hole to relieve pressure and increase permeability; continuing to seal the drill holes and network and pre-drain, and gradually draining the gas in the coal seam to achieve "pressure reduction" of the coal body; after the pre-drainage of the coal body gas reaches the standard, reinforcing the strength of the coal body during the roadway driving operation to improve the "pressure resistance" of the coal body. The present application combines the "unpressurization", "pressure reduction" and "pressure resistance" of the coal seam to develop a directional drilling hole, one-hole multi-purpose comprehensive outburst prevention method, which significantly reduces the gas content of the coal seam, eliminates the stress concentration in front of the roadway driving operation face, enhances the outburst resistance of the coal body, effectively avoids coal and gas outburst accidents, and ensures the safety production of the roadway driving operation face.
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