Results 11 to 20 of about 7,006 (165)
Shock and Vibration, 2021 Multistaged fracturing in the roof of outburst coal seam is an efficient and creative technology for coalbed methane (CBM) drainage, which can effectively improve the permeability of coal seam.
Fan Zhang, Yang Tang
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Prediction of SC-CO2 fracturing effects of coal and rock mass based on DA-DE-SVM intelligent model
Yantu gongcheng xuebao, 2023 The fracturing effect of coal and rock mass is the main basis for the design of supercritical CO2 (SC-CO2) fracturing projects. In order to accurately predict the effects of SC-CO2 fracturing in coal and rock mass, based on the dynamic propagation ...
YAN Hao , ZHANG Jixiong , ZHOU Nan , SHI Peitao
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Triggering Processes in Rock Fracture [PDF]
Physical Review Letters, 2017 We study triggering processes in triaxial compression experiments under a constant displacement rate on sandstone and granite samples using spatially located acoustic emission events and their focal mechanisms. We present strong evidence that event-event triggering plays an important role in the presence of large-scale or macrocopic imperfections ...
Davidsen, J. +6 more
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Fracture and permeability of concrete and rocks [PDF]
Comptes Rendus. Physique, 2021 Continuum Damage Mechanics provides a framework for the description of the mechanical response of concrete and rocks which encompasses distributed micro-cracking, macro-crack initiation, and then its propagation. In order to achieve a consistent setting, an internal length needs to be introduced to circumvent the difficulties inherent to strain ...
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Meikuang Anquan, 2021 Due to the influence of many disturbances in the process of retaining the roadway outside the double U layout working face, taking 2502 working face of Zhangcun Coal Mine of Lu’an Group as the engineering background, the field tests of directional ...
WU Jianxing
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Rock damage evolution model of pulsating fracturing based on energy evolution theory
Energy Science & Engineering, 2020 Pulsating fracturing, as a new technology for unconventional oil and gas exploration, enables to enhance stimulated reservoir volume (SRV) effectively, which further helps to improve well performance.
Yuwei Li +7 more
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Advances in Civil Engineering, 2021 In this study, the continuum-discontinuum element method (CDEM) was used to investigate the tensile fracture mechanism of rock materials. An isotropic rock disk model and models considering different foliation inclinations were established, and three ...
Qunlei Zhang +5 more
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Frontiers in Earth Science, 2021 Previous experiments indicated that infrared radiation temperature (IRT) was applied in monitoring rock stress or rock mass fracturing, and abnormal IRT phenomena preceding rock failure or tectonic earthquakes were frequently reported.
Xiangxin Liu +6 more
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Couple stresses and the fracture of rock [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015 An assessment is made here of the role played by the micropolar continuum theory on the cracked Brazilian disc test used for determining rock fracture toughness. By analytically solving the corresponding mixed boundary-value problems and employing singular-perturbation arguments, we provide closed-form expressions for the energy release rate and the ...
Atkinson, Colin +2 more
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Experimental study on fractures propagation law and fractures mechanism of gel fracturing
Meitan kexue jishuHydraulic fracturing is a widely used physical rock-breaking method to address the challenges in cutting hard rocks. However, conventional water-based fracturing typically generates fractures propagating perpendicular to the minimum principal stress ...
Yukun LIN +6 more
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