caa a22 4500 605454515 CHVBK 20210128100207.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10064-014-0714-5 doi (NATIONALLICENCE)springer-10.1007/s10064-014-0714-5 Mechanism of water inrush and quicksand movement induced by a borehole and measures for prevention and remediation [Elektronische Daten] [Guimin Zhang, Kai Zhang, Lijuan Wang, Yu Wu] In coal mining, a poorly sealed borehole is one of the channels that can lead to an inrush of water and quicksand movement, seriously compromising the safety of the coal mine. In this paper, we used the water inrush and quicksand incident at Longde Coal Mine as an example in order to investigate the mechanism of water inrush and quicksand movement induced by a borehole, as well as to develop measures for the prevention and remediation of such problems. Two sand funnel models and a water inrush outlet model are introduced from which to calculate the flow of the water and quicksand; a comparison of the two shows that the flow predicted by the water inrush outlet model is more consistent with observations from the accident than the sand funnel models. Based on the water inrush outlet model, the aquifer thickness and borehole diameter are the two key factors affecting the flow. The aquifer channel is inferred as tubular, with its diameter gradually decreasing from ground surface to underground, and a time-dependent surface subsidence model is constructed. Finally, we develop a prevention method, "Prior to mining development, borehole should be investigated and plugged for prevention,” and propose a remediation method, "Changing the pipeline flow into fracture flow, followed by changing the fracture flow into pore flow, and finally grouting and plugging.” Springer-Verlag Berlin Heidelberg, 2014 Borehole nationallicence Water inrush and quicksand movement nationallicence Prevention or remediation nationallicence Sand funnel nationallicence Water inrush outlet nationallicence Zhang Guimin State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, Jiangsu, China aut Zhang Kai State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, Jiangsu, China aut Wang Lijuan School of Geodesy and Geomatics, Jiangsu Normal University, 221116, Xuzhou, Jiangsu, China aut Wu Yu State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, Jiangsu, China aut Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1395-1405 1435-9529 74:4<1395 2015 74 10064 https://doi.org/10.1007/s10064-014-0714-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10064-014-0714-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Guimin State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, Jiangsu, China aut NATIONALLICENCE 700 1- Zhang Kai State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, Jiangsu, China aut NATIONALLICENCE 700 1- Wang Lijuan School of Geodesy and Geomatics, Jiangsu Normal University, 221116, Xuzhou, Jiangsu, China aut NATIONALLICENCE 700 1- Wu Yu State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, 221116, Xuzhou, Jiangsu, China aut NATIONALLICENCE 773 0- Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1395-1405 1435-9529 74:4<1395 2015 74 10064