Numerical simulation on mining-induced water inrushes related to geologic structures using a damage-based hydromechanical model
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A large number of statistics indicate that water inrush has a direct relationship with geological structures such as fault and karst collapse columns. Understanding the mechanism of water inrushes controlled by geologic structures is of vital importance for adopting effective measures to prevent their occurrence. The work begins with formulization of a damage-based hydromechanical model based on elastic damage theory. Next, the model is numerically implemented with finite element method by employing a finite element package called COMSOL Multiphysics, and is also validated against some existing experimental observations. Finally, the model is used to simulate the mining-induced groundwater inrushes when the effect of faults and karst collapse columns is considered in the numerical simulation, and some suggestive conclusions for preventing water inrushes and optimizing underground mining operations are drawn.
KeywordsGroundwater inrushes Underground mining Coupled hydromechanical model Damage Numerical simulation
The present work is funded by the National Basic Research Program (“973 program”) of China (Grant No. 2007CB209405), National Science Foundation of China (Grant Nos. 50874024 and 50934006), the Key Project of Chinese Ministry of Education (No. 108038), the Program for New Century Excellent Talents in University of China (Grant No. NCET-06-0291) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry. This support is gratefully acknowledged.
- COMSOL AB (2008) COMSOL multiphysics version 3.5, User’s guide and reference guide. http://www.comsol.com
- Liu HL, Yang TH, Yu QL, Chen SK (2009) Experimental study on permeability evolution during complete failure process of tuff (in Chinese). J Northeast Univ 30(7):1030–1033Google Scholar
- Wang M, Zhang B (1995) Control of the water bursting hazards in northern China type coal mines. Geol Rev 41(6):553–558Google Scholar
- Wu Q, Wang M, Wu X (2004) Investigations of groundwater bursting into coal mine seam floors from fault zones. Int J Rock Mech Min Sci 41:557–571Google Scholar
- Zhang JC, Shen BH (2004) A coal mining under aquifers in China: a case study. Int J Rock Mech Min Sci 41:629–639Google Scholar
- Zhou WF (1997) The formation of sinkholes in karst mining areas in China and some methods of prevention. Env Geol 31(1/2):50–58Google Scholar