Title of article
Simulation of Hydraulic Fracture Propagation in Fractured Coal Seams with Continuum-discontinuum Elements
Author/Authors
Zhou ، Haifeng College of Energy Engineering - Xian University of Science and Technology , Gao ، Hui School of Civil and Transportation Engineering - Hebei University of Technology , Feng ، Chun Institute of Mechanics - Chinese Academy of Sciences , Sun ، Zizheng School of Qilu Transportation - Shandong University
From page
2185
To page
2195
Abstract
Creating new fracture networks in coal seams with natural fractures through hydraulic fracturing techniques is an effective method for exploiting coalbed methane. In this paper, a continuumdiscontinuum element method (CDEM) is developed for simulating and assessing hydraulic fracture propagation in coal seams. An elastic-damage-fracture model is proposed for capturing the deformation and cracking processes of fractured coal. A stress-fracture percolation relation is implemented to simulate the hydro-mechanical coupling processes. The influence of X-direction angles, mechanical strengths, distances and lengths of natural fractures are analyzed in detail. The results are potentially useful to optimize the fracturing design.
Keywords
Continuum , discontinuum element method (CDEM) , Hydraulic fracturing , Fractured coal , Hydro , mechanical coupling
Journal title
Journal of Applied and Computational Mechanics
Journal title
Journal of Applied and Computational Mechanics
Record number
2676135
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