caa a22 4500 605454884 CHVBK 20210128100209.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10064-014-0712-7 doi (NATIONALLICENCE)springer-10.1007/s10064-014-0712-7 Fluid-driven fractures in granular materials [Elektronische Daten] [Xiaoli Liu, Sijing Wang, Shanyong Wang, Enzhi Wang] The initiation and propagation process of a fluid-driven fracture in granular materials is inherently a hydro-mechanical coupling problem. The bonded-particle method (BPM) was utilised to simulate the hydraulic fracturing process in granular materials, and different failure mechanisms were evaluated by analysing the formation of microcracks. Hydraulic conductivity is determined by pore size and connectivity in the direction of flow. A strain-dependent formulation was presented to highlight the inherent link between hydraulic conductivity and pore size. The results show that the BPM is capable of realistically predicting fluid-driven fractures in granular material. Using the BPM, the numbers of fluid-driven fractures induced by different failure modes can be determined. It is concluded that for consolidated formations, the initiation and propagation of fluid-driven fractures are dominated by tensile failure, which has been recognised in the field of geology and geomechanics. However, for unconsolidated formations, shear failure seems to be more important during the hydraulic fracturing process. As described in this article, the number of shear failure cracks is twice that of tension failure cracks, which has not been widely recognised. Overall, the simulation results of the fluid-driven fracture are in accordance with the experimental data observed by other researchers. Springer-Verlag Berlin Heidelberg, 2014 Fluid-driven fracture nationallicence Bonded-particle method nationallicence Granular materials nationallicence Liu Xiaoli State Key Laboratory of Hydroscience and Engineering, Tsinghua University, 100084, Beijing, China aut Wang Sijing Institute of Geology and Geophysics of the Chinese Academy of Sciences, 100029, Beijing, China aut Wang Shanyong Department of Civil, Surveying and Environmental Engineering, Centre for Geotechnical and Materials Modelling, The University of Newcastle, 2308, Callaghan, NSW, Australia aut Wang Enzhi State Key Laboratory of Hydroscience and Engineering, Tsinghua University, 100084, Beijing, China aut Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/2(2015-05-01), 621-636 1435-9529 74:2<621 2015 74 10064 https://doi.org/10.1007/s10064-014-0712-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10064-014-0712-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Xiaoli State Key Laboratory of Hydroscience and Engineering, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 700 1- Wang Sijing Institute of Geology and Geophysics of the Chinese Academy of Sciences, 100029, Beijing, China aut NATIONALLICENCE 700 1- Wang Shanyong Department of Civil, Surveying and Environmental Engineering, Centre for Geotechnical and Materials Modelling, The University of Newcastle, 2308, Callaghan, NSW, Australia aut NATIONALLICENCE 700 1- Wang Enzhi State Key Laboratory of Hydroscience and Engineering, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 773 0- Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/2(2015-05-01), 621-636 1435-9529 74:2<621 2015 74 10064