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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
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,
600 ºC, ...
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
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...
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
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
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
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...
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
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...
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
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 ...
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
A new method for threshold determination of gray image
Springer Science and Business Media LLC - Tập 6 - Trang 1-13 - 2020
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...
Effects of elastic anisotropy on primary petroleum migration through buoyancy-driven crack propagation
Springer Science and Business Media LLC - - 2017
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