Mechanism of water inrush in fractures and block collapse under hydraulic pressure

Jing Wang, Shucai Li, Liping Li, Shaoshuai Shi, Zongqing Zhou and Shuguang Song

Mathematics and Computers in Simulation (MATCOM), 2020, vol. 177, issue C, 625-642

Abstract: High water pressure is one of the primary reasons for fracture water inrush through numerous cracks at the entry points of deep tunnels. Two types of tensile shear failure modes and one type of compression shear failure mode have been established for fracture water inrush under high water pressure condition. In this study, the condition for critical water pressure for two-dimensional crack initiation is proposed and the criterion for water inrush in fractured rock mass is revealed. Next, the model of crack cementation weakening and block collapse under continuous action of water pressure is established. Finally, the collapsing process of the block under the action of hydraulic pressure is simulated by immersed body–spectral element method (IB–SEM) system.

Keywords: Fracture water inrush; Critical water pressure; Block collapse; IB–SEM system (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:177:y:2020:i:c:p:625-642

DOI: 10.1016/j.matcom.2020.05.028

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