Detection and prevention of water inrush from seam floor during coal mining above confined aquifer

Weidong Pan, Department of Intelligent Mining, China University of Mining and Technology in Beijing, Beijing, ChinaFollow
Yupei Deng, Department of Intelligent Mining, China University of Mining and Technology in Beijing, Beijing, China
Houlin Du, Zaozhuang Mining Group Xin'an Coal Company, Shandong Weishan, China
Shiqi Liu, Department of Intelligent Mining, China University of Mining and Technology in Beijing, Beijing, China
Mingtao Xu, Department of Intelligent Mining, China University of Mining and Technology in Beijing, Beijing, China
Xingjie Liu, Department of Intelligent Mining, China University of Mining and Technology in Beijing, Beijing, China

Author ORCID Identifier

Weidong Pan: 0000-0002-6044-8363

Yupei Deng: 0009-0006-7237-5161

Houlin Du: 0009-0000-6556-5852

Shiqi Liu: 0000-0002-5979-607X

Mingtao Xu: 0009-0004-4748-2016

Xingjie Liu: 0009-0001-2229-9248

Abstract

With the increasing intensity of coal resource exploitation in China, the geological conditions of the working face are becoming more and more complex, and the bottom plate breakage (bottom bulge) and water inrush disasters caused by pressurized water mining are becoming more prominent. This article is based on the 21605 working face of Xin’an Coal Mine in Zaozhuang Mining Group. Through theoretical analysis and numerical calculations, the characteristics and scope of coal seam floor failure in the working face are obtained. Especially, the electrode cable direct current detection system designed through self-optimization was used for actual testing. Research shows that the bottom plate of the 21605 working face exhibits the theoretical characteristics of “lower three zones”, with a maximum failure depth of 12.6m, lagging behind the coal wall of the working face by 25m. Propose measures for preventing and controlling water inrush from the bottom plate, including initial isolation and control, mid-term dynamic observation, full process grouting reinforcement, and exposure of key prevention measures. The optimized detection system has a short preparation period, convenient detection, strong adaptability, good stability, and high accuracy, providing important technical means for the safety of pressurized water mining and bottom plate detection.

Recommended Citation

Pan, Weidong; Deng, Yupei; Du, Houlin; Liu, Shiqi; Xu, Mingtao; and Liu, Xingjie (2025) "Detection and prevention of water inrush from seam floor during coal mining above confined aquifer," Journal of Sustainable Mining: Vol. 24 : Iss. 4 , Article 7.
Available at: https://doi.org/10.46873/2300-3960.1475