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| RESEARCH ON HYDRAULIC FRACTURING BASED ON SMEARED CRACK MODEL |
| ZHAO Peng1，2，XIE Lingzhi1，2，YANG Chunhe3，GUO Yintong3 |
(1. College of Architecture and Environment，Sichuan University，Chengdu，Sichuan 610065，China；2. Key Laboratory of Engineering Safety and Disaster Mechanics，Ministry of Education，Sichuan University，Chengdu，Sichuan 610065，China；
3. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，
Chinese Academy of Science，Wuhan，Hubei 430071，China) |
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Abstract ：Considering the disadvantage of huge calculation，preset cracks and the growth path for the traditional discrete crack model for hydraulic fracturing numerical simulation，this paper proposed a solution to simulate hydraulic fracturing using smeared crack model，and provided reference for realizing the simulation of the fracture network evolution on large scales. According to the theory of solid-fluid coupling，the stress and fluid flow control equations based on the smeared crack model were established. Hydraulic fracturing process of concrete was analyzed by both test method and numerical method based on smeared fracture model. The initiation fracture pressure in the two methods was almost the same. Both in experimental and numerical analysis，the propagation of fracture was mainly influenced by the in-situ stress，and the direction of propagation was perpendicular to the horizontal minimum in-situ stress direction. Finally，a major fracture was formed in the specimen，and ran through the whole specimen.
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2015, Vol. 34 
