Meikuang Anquan (Dec 2022)
Safe mining technology in 22206 working face under water of Huoluowan Coal Mine
Abstract
The 22206 working face of Huoluowan Coal Mine is under shallow buried depth and thin bedrock coal seam. Both the surface and overlying rock are rich in water. The study of safe mining technology under water is of great significance to the safe mining of the working face. The paper determines the height of the water-conducting fissure zone of the working face through theoretical analysis methods, analyzes the characteristics of the working face water damage, and proposes the technical ideas of separate source prevention and control of water hazards: using water interception technology for surface water, underground water drainage engineering for underground aquifer water, and water-proof coal rock pillar waterproof technology. The mining practice shows that the surface water interception and diversion project successfully cut off Huhe Wusu Gully and exported Huhe Wusu Gully river water out of the study area, reducing the threat of Huhe Wusu Gully water body to underground mining; the water inrush of 22206 working face gradually increases with time, the growth range is stable, there is no large increase water inrush phenomenon, and the water inrush of later working face gradually decreases with time.
Keywords
