期刊
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
卷 132, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2020.104383
关键词
Hydraulic fracturing; Bond-based peridynamics; Hydromechanical coupling; Pressurized and fluid-driven fracturing
资金
- National Natural Science Foundation of China (NSFC) [51839009, 41807251, 51679017]
- National Program on Key Basic Research 973 Project of China [2014CB046903]
- Natural Science Foundation Project of Chongqing CQ-CSTC [cstc2017jcyj-yszxX0013, cstc2017jcyjA1250]
In this paper, a new fully coupled hydromechanical model in terms of bond-based peridynamics is proposed to simulate the pressured and fluid-driven fracturing process in fissured porous rocks. A fissured porous rock model is established based on the classic Biot poroelasticity theory. The coupled hydromechanical bond-based peridynamic model consists of two parts: fluid flow and mechanical deformation. A governing equation of fluid flow in terms of peridynamics is established along with an integral-differential equation of motion in the fissured porous medium. Moreover, a fracture criterion in the hydromechanical bond-based peridynamic model is introduced to simulate the failure caused by high fluid pressure. Finally, four numerical simulations are conducted to verify the accuracy and correctness of the proposed model.
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