Experimental Study on Seepage Characteristics of Fractured Rock Mass and Its Electrical Response
Publication: Journal of Hydrologic Engineering
Volume 24, Issue 7
Abstract
Fissure seepage is the main factor that causes mine water disasters. Physical models of the fractured rock mass with various widths of fracture were designed to perform the seepage test, which demonstrated the seepage characteristics of the fractured rock mass. Furthermore, grouting tests were performed, with the network parallel electrical test conducted simultaneously, during the water and slurry seepage, respectively. The relationship between the seepage velocity and the hydraulic gradient during the seepage process was fitted to a quadratic function, in which the seepage flow resistance of the fractured water was a key factor affecting the seepage flow. The percolation velocity gradually decreased as the width of the percolation fissures increased under the relatively stable seepage pressure difference. The seepage velocity of the percolation medium was quantified by the change of the natural electric field along the path of the seepage. The change extent of the exciting current and the variation of apparent resistivity determined the location of the percolated medium and the filling effect on the space of the seepage channel.
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Acknowledgments
This research is supported by the Fundamental Research Funds for the Central Universities (Grant No. 2018QNA42) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.
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Published In
Journal of Hydrologic Engineering
Volume 24 • Issue 7 • July 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 23, 2018
Accepted: Jan 18, 2019
Published online: Apr 25, 2019
Published in print: Jul 1, 2019
Discussion open until: Sep 25, 2019
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