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Theory of Effective Stress in Soil and Rock and Implications for Fracturing Processes: A Review

open access: yesGeosciences, 2021
The effective stress principle (ESP) plays a basic role in geology and engineering problems as it is involved in fundamental issues concerning strain and failure of rock and soil, as well as of other porous materials such as concrete, metal powders ...
Vincenzo Guerriero, Stefano Mazzoli
doaj   +1 more source

Investigation of Stress Sensitivity of Shale Nanopores via a Nuclear Magnetic Resonance Method

open access: yesEnergies, 2022
Nuclear magnetic resonance (NMR) is widely used to characterize the pore structure of rock. The nanoscale pores and fractures are well developed in a shale gas reservoir.
Mingjun Chen   +7 more
doaj   +1 more source

Permeability Evolution of Bituminous Coal and Its Dynamic Control, a Case Study from the Southeastern Ordos Basin, China

open access: yesEnergies, 2023
Coalbed methane (CBM) reservoirs’ permeability is the result of dynamic variations influenced by tectonics, hydrology and the CBM production process. Taking samples from the southeastern Ordos Basin, China, the permeability evolution of bituminous coal ...
Yongkai Qiu   +4 more
doaj   +1 more source

Research on prediction methods of formation pore pressure based on machine learning

open access: yesEnergy Science & Engineering, 2022
Formation pressure is the most fundamental data in oil and gas drilling and production; it has an important position in the entire cycle of oil and gas extraction.
Honglin Huang   +8 more
doaj   +1 more source

Experimental Analysis of Effective Stress Sensitivity of 3# Coal Seam Permeability in Xinjing Mine

open access: yesMeikuang Anquan, 2020
The KDZS-II type coal body gas instantaneous desorption and seepage characteristic tester was used to analyze the effective stress sensitivity of 3# coal seam in Xinjing Mine under the gas pressure conditions of 0.31 MPa and 0.61 MPa.
XIE Yuhua, ZHAO Kun, LIU Jianbao, ZHANG Jianfeng, YANG Changyong
doaj   +1 more source

Analytical model for undrained residual shear strength of foam-conditioned coarse-grained soils in large deformation based on effective stress principle

open access: yesYantu gongcheng xuebao, 2023
Foam is usually used in soil conditioning of earth pressure balance shield tunnelling. The smooth muck discharge and chamber pressure transmission require foam-conditioned coarse-grained soils with suitable flowability to avoid face instability and ...
ZHONG Jiazheng 1, 2, WANG Shuying 1, 2, 3, FENG Zhiyao 1, 2, ZHU Hanbiao 1, 2
doaj   +1 more source

Laboratory Study of Effective Stress Coefficient for Saturated Claystone

open access: yesApplied Sciences, 2023
Claystone is potentially the main rock formation for the deep geological disposal of high-level radioactive nuclear waste. A major factor that affects the deformation of the host medium is effective stress.
Fanfan Li   +6 more
doaj   +1 more source

Experimental study on stress sensitivity of high‐temperature and high‐pressure sandstone gas reservoirs in Yingqiong Basin

open access: yesEnergy Science & Engineering, 2020
Performing stress‐sensitivity evaluation on a high‐temperature and high‐pressure gas reservoir is essential for correctly understanding the characteristics of physical property changes and reasonably designing the development scheme of a reservoir under ...
Yi‐Long Li   +8 more
doaj   +1 more source

An effective stress equation for unsaturated silt considering the microstructure of pore water and its verification

open access: yesShuiwen dizhi gongcheng dizhi, 2022
Accurate determination of the effective stress coefficient is an important thing in the study of the effective stress of unsaturated soils. However, the existing effective stress coefficients have not well considered the effect of the microscopic ...
Lifeng ZENG   +3 more
doaj   +1 more source

Temperature Effect on Mohr–Coulomb’s Effective Strength Parameters of Paste Backfill

open access: yesFrontiers in Materials, 2022
In-stope paste backfill monitoring at different mine sites showed anomalous increase in total stress during rest periods. One of the explanations according to a recent laboratory- model experiment was attributed to volumetric expansion caused by ...
Alsidqi Hasan, Wee Kiet Ting
doaj   +1 more source

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