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Exploration of microstructure characteristics and mechanical behaviors of thermal-damaged argillaceous sandstone via LF-NMR and µ-CT technologies
Springer Science and Business Media LLC - Tập 9 Số 1 - Trang 1-20 - 2023
Liu, Shi, Huang, Zhe
The effect of high temperature on the microstructure and mechanical behavior of rocks is a fundamental issue relevant to the exploitation of underground oil and gas resources, underground disposal of highly radioactive nuclear waste, and the development of geothermal energy. In this study, samples of argillaceous sandstone are subjected to high-temperature treatments (i.e., 25 ºC, 300 ºC...... hiện toàn bộ
Non-linear elastic behavior and constitutive model of coal during compression and its application
Springer Science and Business Media LLC - Tập 8 - Trang 1-22 - 2022
XianJie Hao, WeiSheng Du, Peng Lin, YaoDong Jiang, JiShan Liu, GuangHui Zhao, YingNan Wei, ZhuoWen Sun
The widely distributed fracture system in coal results in significant non-linear characteristics in the compaction stage during the compression process. This stage occupies one-third of the entire compression process of coal, and is a key stage in the coal compression process. A non-linear elastic model based on the hyperbola was established to investigate the axial and lateral deformation of coal...... hiện toàn bộ
The mechanism of hysteretic ground settlement caused by shield tunneling in mixed-face conditions
Springer Science and Business Media LLC - Tập 4 Số 1 - Trang 51-61 - 2018
Ming Gao, Zhi long Zhang, Zhi qiang Qiu, Chuan Xu, Jian Zhao
Discrete element method simulation of the growth and efficiency of multiple hydraulic fractures simultaneously-induced from two horizontal wells
Springer Science and Business Media LLC - - 2021
Di Kang, Yingchun Li, Wendong Yang
Quantitative characterization of single-phase flow through rough-walled fractures with variable apertures
Springer Science and Business Media LLC - Tập 6 - Trang 1-14 - 2020
Jiabin Dong, Yang Ju
Fluid flow through rock media is highly significant in underground water management, the geothermal recovery process, and various underground engineering applications. Fractures have a critical effect on the fluid flow through low-permeability rocks since they serve as the major flow channels in the rock formation. Consequently, the evaluation of fracture permeability is crucial to many engineerin...... hiện toàn bộ
Study on permeability evolution mechanism of aquifer coal seam roof sandstone under plastic flow
Springer Science and Business Media LLC - Tập 7 - Trang 1-22 - 2021
Jingna Guo, Qi Zhang, Qiang Li, Zhanqing Chen
The plastic zone of the roof surrounding rock continues to expand after the coal seam mining. The permeability of the surrounding rock under plastic flow is a basic project for water inrush prevention in coal mine. In this work, the permeability experiments were carried out on roof sandstone from Xiaojihan No.2 coal seam under three loading paths. The variations of permeability affected by the con...... hiện toàn bộ
New permeability model of deep coal rock considering the structure and 3D stress compression-induced anisotropy
Springer Science and Business Media LLC - Tập 8 - Trang 1-20 - 2022
Jianhua Li, Heping Xie, Jun Lu, Mingzhong Gao, Bobo Li, Yan Wu
Understanding the gas flow behavior in coal mining is conducive to the efficient production of coalbed methane. In coal mining, in-situ stress usually manifests as three-dimensional anisotropy in deep formations, and affects the gas permeability in reservoirs. In this work, a permeability model for anisotropic coal by combining gas sorption effects and the three-dimensional stress compression was ...... hiện toàn bộ
Stress threshold identification of progressive fracturing in Bukit Timah granite under uniaxial and triaxial stress conditions
Springer Science and Business Media LLC - Tập 2 Số 4 - Trang 301-330 - 2016
B. Lee, T.D. Rathnaweera
A new method for threshold determination of gray image
Springer Science and Business Media LLC - Tập 6 - Trang 1-13 - 2020
Jiang-Feng Liu, Xu-Lou Cao, Jerry Xu, Qiang-Ling Yao, Hong-Yang Ni
The determination of the gray threshold is crucial for the quantitative characterization of digital images. In this study, a new algorithm is proposed to determine the optimal image segmentation threshold. This algorithm is based on a combined analysis of the gray distribution curve and its second differential distribution curve of the digital image. Then, the feasibility and accuracy of the Liu–C...... hiện toàn bộ
Effects of elastic anisotropy on primary petroleum migration through buoyancy-driven crack propagation
Springer Science and Business Media LLC - - 2017
Z.-H. Jin, Scott E. Johnson
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