Numerical analyses of coupled thermal–hydraulic–mechanical–chemical​ processes for estimating permeability change in fractured rock induced by alkaline solution

Ogata, Sho; Yasuhara, Hajime; Kinoshita, Naoki; Inui, Tomoyuki; Nishira, Eita; Kishida, Kiyoshi

doi:10.1016/j.gete.2022.100372

Cited by 9 publications

(2 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This model integrates the principles of elastic-plasticity and damage mechanics theories [ 20 ]. A linked model was put up by Ogata et al [ 21 ] to explain how the pH affects the permeability of fractured rocks. The suggested model is used to predict the long-term permeability evolution of a naturally occurring granite barrier within a geological repository under underground circumstances.…”

Section: Introductionmentioning

confidence: 99%

Chemical Corrosion-Water-Confining Pressure Coupling Damage Constitutive Model of Rock Based on the SMP Strength Criterion

Chen,

Tong,

Chen

et al. 2023

Materials

View full text Add to dashboard Cite

Aiming at the problem of chemical-mechanics-hydro (C-M-H) action encountered by rocks in underground engineering, chemical damage variables, water damage variables, and force damage variables are introduced to define the degree of degradation of rock materials. Stone is selected as the sample for acid corrosion treatment at pH 3, 4, and 7, and a chemical damage factor is defined that coupled the pH value and duration of exposure. Then based on the spatial mobilized plane (SMP) criterion and the Lemaitre strain equivalence hypothesis, this research develops a constitutive model considering rock chemical corrosion-water-confining pressure damage. The proposed damage constitutive model employs the extremum method to ascertain the two Weibull distribution parameters (m and F0) by theoretical derivation and exhibits satisfactory conformity between the theoretical and experimental curves. The damage constitutive model can be consistent in the stress–strain characteristics of the rock triaxial compression process, which verifies the rationality and reliability of the model parameters. The model effectively represents the mechanical properties and damage characteristics of rocks when subjected to the combined influence of water chemistry and confinement. The presented model contributes to a better understanding of tangible rock-engineered structures subjected to chemical corrosion in underwater environments.

show abstract

Section: Introductionmentioning

confidence: 99%

Chemical Corrosion-Water-Confining Pressure Coupling Damage Constitutive Model of Rock Based on the SMP Strength Criterion

Chen,

Tong,

Chen

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…With respect to discrete properties of samples, numerical simulations have been used in the study of coal and rock fracture evolution [22,23]. Han et al (2020) divided the shearing process of rock-like materials into four stages, including the linear elastic stage, crack strengthening stage, plastic softening stage, and residual strength stage, based on the simulation results [24].…”

Section: Introductionmentioning

confidence: 99%

Fracture Evolution of Overburden Strata and Determination of Gas Drainage Area Induced by Mining Disturbance

Cai

Kong

et al. 2023

Sustainability

View full text Add to dashboard Cite

Overburden strata fracture evolution is critical to dynamic disaster prevention and gas-relief drainage, so it is important to accurately determine the evolution relationships with mining disturbance. In this paper, experiments and numerical simulation were adopted jointly to characterize the time-varying fracture area of overlying strata. The experimental results showed that the roof strata gradually broke and collapsed with coal mining, which indicated the fractures of overburden strata developed in an upward direction. The fracture development causes were explained by numerical simulation, which showed that stress increase exceeded the strength of coal and rock strata, and fractures were formed and expanded. Both experiments and numerical simulation results showed the two sides and the top of fracture areas provided channels and spaces for gas migration and reservoir, respectively. In addition, the breaking angle of overburden strata and the height of fracture areas were analyzed quantitatively. Through microseismic monitoring at the mining site, the fracture scales and ranges of overburden strata were verified by the energy and frequency of microseismic events, which were consistent with the support of maximum resistance. The position of drainage boreholes was considered based on the results of overburden strata fracture evolution. Our study is aimed at promoting coal mining in safety and improving gas drainage with a sustainable approach.

show abstract

Structure Parameters Optimization and Feasibility Tests of the Organ-Pipe Nozzle to Improve Near-Wellbore Reservoir Permeability

Chen,

Zou,

Zhou

et al. 2024

Mechanisms and Machine Science

View full text Add to dashboard Cite

Numerical analyses of coupled thermal–hydraulic–mechanical–chemical processes for estimating permeability change in fractured rock induced by alkaline solution

Cited by 9 publications

References 50 publications

Chemical Corrosion-Water-Confining Pressure Coupling Damage Constitutive Model of Rock Based on the SMP Strength Criterion

Chemical Corrosion-Water-Confining Pressure Coupling Damage Constitutive Model of Rock Based on the SMP Strength Criterion

Fracture Evolution of Overburden Strata and Determination of Gas Drainage Area Induced by Mining Disturbance

Structure Parameters Optimization and Feasibility Tests of the Organ-Pipe Nozzle to Improve Near-Wellbore Reservoir Permeability

Contact Info

Product

Resources

About

Numerical analyses of coupled thermal–hydraulic–mechanical–chemical​ processes for estimating permeability change in fractured rock induced by alkaline solution

Cited by 9 publications

References 50 publications

Chemical Corrosion-Water-Confining Pressure Coupling Damage Constitutive Model of Rock Based on the SMP Strength Criterion

Chemical Corrosion-Water-Confining Pressure Coupling Damage Constitutive Model of Rock Based on the SMP Strength Criterion

Fracture Evolution of Overburden Strata and Determination of Gas Drainage Area Induced by Mining Disturbance

Structure Parameters Optimization and Feasibility Tests of the Organ-Pipe Nozzle to Improve Near-Wellbore Reservoir Permeability

Contact Info

Product

Resources

About

Numerical analyses of coupled thermal–hydraulic–mechanical–chemical processes for estimating permeability change in fractured rock induced by alkaline solution