Results 61 to 70 of about 597 (146)

Continuum and combined continuum-discontinuum analysis of wellbore mechanics and stimulation response [PDF]

, 2016
Wellbore drilling and stimulation activities are interlinked processes within the task of borehole construction. Before drilling a well, the initial stress state in the rock can be defined by three principal stresses, with a typical assumption that these
Alruwaili, Khalid Mohammed M.
core  

Numerical simulation of multiple hydraulic fracture propagation in heterogeneous coal reservoirs based on combined finite-discrete element method

Frontiers in Earth Science
Multi-stage fracturing in Horizontal well increases the permeability of coalbed methane by generating multiple fractures. However, the heterogeneity of coal reservoirs is a crucial factor that cannot be ignored in the study of multiple hydraulic fracture
Binwei Xia, Xingguo Zhang, Zikun Ma, Xinqin Xu   +3 more
doaj   +1 more source

From particulates toscience of discontinua: generalization of particle simulation methods [PDF]

, 2013
In this work, we demonstrate that the rapid developments of methods of discontinua, when coupled with virtual experimentation and complementary discontinua based experimental and theoretical methods, are resulting in a significant paradigm shift from ...
Knight, Earl E., Kruggel-Emden, Harald, Munjiza, Ante, Rougier, Esteban, Zhou, Lei   +4 more
core  

Mechanical Properties and Failure Mechanisms of Layered Coal-Rock Combinations Under Different Confining Pressures and Thickness Ratios: A 3D FDEM-Based Numerical Simulation Study

Eng
Clarifying the mechanical properties and failure patterns of layered coal–rock combinations in coal-measure strata is critical to guiding hydraulic fracturing design in petroleum and mining engineering.
Richao Cong, Yanjun Feng, Shizhong Cheng, Penghao Lin, Xiaoguang Shang   +4 more
doaj   +1 more source

Numerical investigation of the path-dependent frost heave process in frozen rock under different freezing conditions

Journal of Rock Mechanics and Geotechnical Engineering
Frost heave in water-bearing rock masses poses significant threats to geotechnical engineering. This paper developed a novel three-dimensional (3D) frost model, based on the combined finite-discrete element method (FDEM), to investigate the frost heave ...
Lei Sun, Xuhai Tang, Brant Zeeman, Quansheng Liu, Giovanni Grasselli   +4 more
doaj   +1 more source

Insights of microstructures and lithofacies on fracture process zone of organic-rich shale

Rock Mechanics Bulletin
The fracture process zone (FPZ) plays a critical role in determining the mechanical properties of shale,as a quasi-brittle material. In this study, the effects of microstructure on fracture process zones of Carbonate Dominated (CD) shale and Quartz ...
Shenjian Li, Mao Sheng, Chao Deng, Shizhong Cheng, Zhiwei Wang, Yiwen Xu, Peng Xu, Shouceng Tian, Gensheng Li   +8 more
doaj   +1 more source

Numerical modeling of fretting wear [PDF]

, 2013
Abdel Wahab, Magd, Hojjati Talemi, Reza, Sadeghi, Mohammadzamaan, Yue, Tongyan   +3 more
core   +2 more sources

Investigation of stress-induced progressive failure of mine pillars using a Voronoi grain-based breakable block model

International Journal of Mining Science and Technology
The Voronoi grain-based breakable block model (VGBBM) based on the combined finite-discrete element method (FDEM) was proposed to explicitly characterize the failure mechanism and predict the deformation behavior of hard-rock mine pillars.
Shili Qiu, Shirui Zhang, Quan Jiang, Shaojun Li, Hao Zhang, Qiankuan Wang   +5 more
doaj   +1 more source

Mechanical-acoustic-optical combined characterization for uniaxial compression failure of soft-hard interbedded rock-like material

Journal of Materials Research and Technology
The interbedded structures and soft-hard rock interfaces within soft-hard interbedded rock mass (SHIRM) lead to complex mechanical behaviors and failure modes, which pose significant safety challenges for tunnel construction.
Jiaqi Guo, Yue Li, Zheng Wang, Jianxun Chen, Chong Xu   +4 more
doaj   +1 more source

Experimental and numerical study on rock burst triggering mechanism via spatiotemporal evolution of stress flow

Meitan kexue jishu
To address the prevention and control of rock burst disasters in deep coal mines, this study focuses on the spatiotemporal evolution mechanism of mining-induced stress, introducing the novel concept of “stress flow” to characterize dynamic stress ...
Chi LIU, Xingyu JIANG, Haitao LI, Pengyu MU, Huaguang LIU, Honghui YUAN, Qingxin QI, Shouguang WANG   +7 more
doaj   +1 more source