Abstract
Water hazard control in China’s underground coal mines is complicated. Drilling and controllable grouting have been integrated to provide accurate and efficient water control. Surface directional drilling, surface radial jet, and underground long-distance directional drilling have been used comprehensively along with controlled grouting through boreholes, construction of water-blocking walls and plugs, and bottom grouting to accurately cut off groundwater flow and control water hazards. A management and control system can reduce the mutual interference between groundwater and mining, controlling water hazards and protecting water resources.
Zusammenfassung
Die Beherrschung und Kontrolle von Wassereinbrüchen in unterirdische Kohlebergwerke in China ist komplex und anspruchsvoll. Um solche Wassereinbrüche effizient beherrschen zu können, werden verschiedene Bohrverfahren sowie kontrollierte Injektionsarbeiten genutzt. Angewendet werden hierbei über- und untertägige Richt- sowie Radialstrahlbohrtechnologien, die z. T. über große Entfernungen ausgeführt werden. Zusammen mit kontrollierten Bohrlochinjektionen, der Errichtung von wasserabsperrenden Wänden und Plomben sowie Bodeninjektionen werden diese Technologien zur Minderung des Grundwasserflusses eingesetzt, um Wassereinbrüche zu kontrollieren. Ein Management- und Kontrollsystem kann die Gefahr von Grundwasserzuflüssen in untertägige Bergwerke reduzieren und gleichzeitig Wasserressourcen schützen.
Resumen
El control de riesgo del agua en las minas de carbón subterráneas de China es complicado. La perforación y la inyección controlada de lechada se han integrado para proporcionar un control preciso y eficaz del agua. La perforación direccional de superficie, el chorro radial de superficie y la perforación direccional subterránea de larga distancia se han utilizado de forma exhaustiva junto con la lechada controlada a través de las perforaciones, la construcción de muros y tapones de bloqueo de agua y la lechada de fondo para cortar con precisión el flujo de agua subterránea y controlar los riesgos del agua. Un sistema de gestión y control puede reducir la interferencia mutua entre las aguas subterráneas y la minería, controlando los riesgos del agua y protegiendo los recursos hídricos.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (2017YFC0804102).
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Liu, Q., Liu, Z., Liu, Z. et al. Water Hazard Control Technology Based on Integral Drilling and Controllable Grouting in Coal Mines. Mine Water Environ 41, 119–125 (2022). https://doi.org/10.1007/s10230-021-00818-7
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DOI: https://doi.org/10.1007/s10230-021-00818-7