A power function model for simulating creep mechanical properties of salt rock

Li, Huan; William, Ngaha Tiedeu; Daemen, J.J.K.; Zhou, Jianting; Ma, Changkun

doi:10.1007/s11771-020-4318-x

Cited by 15 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the test curve in Figure 3, it can be seen that although each subsequent creep stage is carried out on the basis of a certain creep strain history, each test stage still has its own transient creep stage and gradually enters the steady-state creep stage. With the changes in stress difference and confining pressure during the loading process, the creep of salt rock specimens exhibits completely different properties [11][12][13][14][15][16]. From the test curve, it can be seen that: (1) In the compression test of salt rock, both instantaneous strain and creep strain exist, and the entire test process conforms to the creep law of the rock.…”

Section: Creep Testing and Model Determination Of Gypsum Salt Layermentioning

confidence: 99%

Numerical Simulation Study of Creeping Rock Formation in Jin X Fracture Block of Jingqiu Oilfield

Li,

Ru,

Wang

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The Jin X fault block in Jing qiu Oilfield, as the main oil producing area of Huabei Oilfield.At present, there are a total of 141 wells drilled in this block, and 97 wells with damaged casing have been transformed;The casing transformation of wells has led to an increase in abandoned wells in this block, resulting in serious damage to the well network. The JinX fault block has a large number of damaged wells. The number of abandoned wells in this area has increased due to casing deformation, resulting in severe damage to the well network and high degree of casing damage. Among them,71 wells have been severely damaged due to casing deformation, such as scrapping, channeling, and pipe sticking, which have affected production, accounting for 73.2%. This has seriously affected the efficiency of oilfield production in the region.Previous statistics show that most of the casing deformation sections are in the paste salt formation, and the form of casing deformation and casing damage is mainly deformation. In order to investigate the mechanism of casing damage in the casing section, this paper establishes the creep equation of the casing layer in JinX block by conducting microstructure analysis of the casing layer and creep experiments in the casing layer, and then establishes a creep calculation model by using 3D numerical simulation technology, combining geological structure and well type conditions. The creep calculation model is then used to analyze the creep pattern under different conditions through simulation calculations, thus providing a reference for formulating effective casing loss prevention and control measures for the Jin X fault block.

show abstract

Section: Creep Testing and Model Determination Of Gypsum Salt Layermentioning

confidence: 99%

Numerical Simulation Study of Creeping Rock Formation in Jin X Fracture Block of Jingqiu Oilfield

Li,

Ru,

Wang

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…When τ ≥ τs, I, II, III, and IV all participate in creep deformation. e state equations of the creep model are From formula (15),…”

Section: Nonlinear Viscoelastic-plastic Creep Modelmentioning

confidence: 99%

“…e rheological effect of rock is obvious in slope, tunnel, roadway, and other projects, which is a very important feature of rock materials [8][9][10][11][12][13]. A large number of engineering practices show that the long-term stability of a project is closely related to the rheological properties of rock [14][15][16][17]. Rock creep is an important part of rock rheological mechanics theory, and research on rock creep constitutive models is the core content of the theory [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Viscoelastic‐Plastic Creep Model of Rock Based on Fractional Calculus

Wei

et al. 2022

Advances in Civil Engineering

View full text Add to dashboard Cite

A rock creep constitutive model is the core content of rock rheological mechanics theory and is of great significance for studying the long-term stability of engineering. Most of the creep models constructed in previous studies have complex types and many parameters. Based on fractional calculus theory, this paper explores the creep curve characteristics of the creep elements with the fractional order change, constructs a nonlinear viscoelastic-plastic creep model of rock based on fractional calculus, and deduces the creep constitutive equation. By using a user-defined function fitting tool of the Origin software and the Levenberg–Marquardt optimization algorithm, the creep test data are fitted and compared. The fitting curve is in good agreement with the experimental data, which shows the rationality and applicability of the proposed nonlinear viscoelastic-plastic creep model. Through sensitivity analysis of the fractional order β2 and viscoelastic coefficient ξ2, the influence of these creep parameters on rock creep is clarified. The research results show that the nonlinear viscoelastic-plastic creep model of rock based on fractional calculus constructed in this paper can well describe the creep characteristics of rock, and this model has certain theoretical significance and engineering application value for long-term engineering stability research.

show abstract

“…Li et al proposed a power function model for modeling the creep mechanical properties of salt rock based on the linear parallel bond model (LPBM). 24 Yin et al 25 and Mansouri and Ajalloeian 26 studied the mechanical properties of rock salt uniaxial compression damage repair and found that the damaged rock salt showed a hardening effect after repair and that grain boundary cracking and grain boundary slip were the main deformation mechanisms. Li et al investigated the creep deformation characteristics and acoustic emission activity law of salt rock in the triaxial compression test and found that the residual strain in front of the high-stress platform is larger than that behind the platform, and the acoustic wave and acoustic emission characteristics of salt rock are closely related to the test peripheral compressive stress.…”

Section: Introductionmentioning

confidence: 99%

“…Fan et al and Ma et al studied the mechanical properties of rock salt under the combined action of creep and fatigue and established a creep-fatigue constitutive model of salt rock with complex loading and unloading paths. Li et al proposed a power function model for modeling the creep mechanical properties of salt rock based on the linear parallel bond model (LPBM) . Yin et al and Mansouri and Ajalloeian studied the mechanical properties of rock salt uniaxial compression damage repair and found that the damaged rock salt showed a hardening effect after repair and that grain boundary cracking and grain boundary slip were the main deformation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Damage Self-Healing Property of Dissolved Salt Columns in Solid Potash Mine

Zhang,

Ren,

et al. 2024

ACS Omega

View full text Add to dashboard Cite

The objective of this work was to investigate the self-healing properties and mechanical damage characteristics of dissolved salt columns under different humidity and time conditions. Based on the results of electron microscope scanning and uniaxial mechanical tests, the microscopic element distribution of the ore and the microscopic morphology of the minerals were investigated, and the healing, mechanical, and damage properties of the specimens were analyzed, which revealed the microscopic reinforcement mechanism of the damage healing of the dissolved salt columns. The results showed that the healing reinforcement, compressive strength, and modulus of elasticity of dissolved salt columns under uniaxial compression show a tendency to increase, then decrease with the increase of humidity, and gradually increase with the increase of the maintenance time and reach the maximum value at 10% humidity and 30 days of maintenance time, which are 3.48, 8.07, and 650 MPa, respectively. The damage type of the healed specimen as a whole gradually transitioned from tensile damage to shear-slip type, indicating that the brittle damage characteristics of the specimen under loading became more and more significant. Based on the principle of strain equivalence, the damage evolution equation under uniaxial compression of solid potash dissolved salt columns describes the damage evolution law and destruction process of the specimen, and the results of the damage characterization of the dissolved salt columns are consistent with the change rule of the healing properties and mechanical properties with humidity and conservation time. Based on the fine morphological features of the dissolved salt column specimens after selfhealing, three different self-healing microscopic mechanisms for damage recovery of solid potash dissolved salt columns are summarized, namely, healing of damaged microcracks based on diffusion, recrystallization healing of brine-filled microfractures, and healing adhesion of crystal particles in dissolved zones. These microstructures effectively transform cracks into isolated sections and play a key role in improving mechanical properties. In addition, the higher the humidity, the thicker adsorbed water film is produced on the fissure surface, which accelerates the transportation of materials on the fissure surface, and the healing rate of the dissolved salt columns increases. However, when the humidity is too high, it causes the evaporation of the liquid film to be less than the recharge of water vapor, which reduces the healing rate of the dissolved salt columns. Thus, suitable humidity produces a more pronounced healing effect than an environment maintained at a constant high humidity level. The research results can provide theoretical guidance for the filling mining of solid potassium salt.

show abstract

A power function model for simulating creep mechanical properties of salt rock

Cited by 15 publications

References 26 publications

Numerical Simulation Study of Creeping Rock Formation in Jin X Fracture Block of Jingqiu Oilfield

Numerical Simulation Study of Creeping Rock Formation in Jin X Fracture Block of Jingqiu Oilfield

Nonlinear Viscoelastic‐Plastic Creep Model of Rock Based on Fractional Calculus

Damage Self-Healing Property of Dissolved Salt Columns in Solid Potash Mine

Contact Info

Product

Resources

About