caa a22 4500 445815450 CHVBK 20180317145226.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10040-011-0731-4 doi (NATIONALLICENCE)springer-10.1007/s10040-011-0731-4 The role of pore pressure during hydraulic fracturing and implications for groundwater outbursts in mining and tunnelling [Elektronische Daten] [Tianhong Yang, Wancheng Zhu, Qinglei Yu, Honglei Liu] Le rôle de la pression porale au cours de la fracturation hydraulique et les implications pour les arrivées brutales d'eau souterraine dans les mines et tunnels Water outbursts from the floor during underground mining, and those from the surrounding rock mass of tunnels, involve the basic principle of hydraulic fracturing. Based on the hydraulic-fracturing mechanism, considered to be dependent on the coupling between seepage and damage, it is deemed that the variation of the pore-fluid pressure coefficient must be taken into account during this coupled process, in order to correctly establish the crack propagation mechanism during hydraulic fracturing. The coupled seepage-damage model is validated using numerical simulations of hydraulic fracturing around one hole and three holes; the model may also enable scientific and reasonable explanation of the dominance of hydraulic gradient on the crack propagation path in permeable rock. Finally, the water outburst from the floor at a coal mining site in Hebei Province, China, is numerically simulated, and the coupled seepage and damage mechanism during the mining-induced rock failure is clarified. The numerical simulation implies that the seepage-damage is the main mechanism for controlling the water outburst. Therefore this mechanism should be considered in the numerical simulation to understand the essence of water outburst induced in mines. Springer-Verlag, 2011 Groundwater outburst nationallicence Hydraulic fracturing nationallicence Numerical simulation nationallicence China nationallicence Yang Tianhong Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut Zhu Wancheng Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut Yu Qinglei Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut Liu Honglei Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut Hydrogeology Journal Springer-Verlag 19/5(2011-08-01), 995-1008 1431-2174 19:5<995 2011 19 10040 https://doi.org/10.1007/s10040-011-0731-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0731-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yang Tianhong Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut NATIONALLICENCE 700 1- Zhu Wancheng Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut NATIONALLICENCE 700 1- Yu Qinglei Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut NATIONALLICENCE 700 1- Liu Honglei Center for Rock Instability and Seismicity Research, Northeastern University, P.O. Box 138, Northeastern University, 110004, Shenyang, China aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/5(2011-08-01), 995-1008 1431-2174 19:5<995 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer