Mechanical properties and damage constitutive model of silty mudstone under heating and water-cooling cycles

Fu, Hongyuan; Yu, Xiaowei; Zeng, Ling; Luo, Jintao; Liu, Jie

doi:10.1007/s11440-023-02225-4

Cited by 4 publications

(1 citation statement)

References 47 publications

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“…In the process of deep oil and gas exploitation, high-temperature and high-pressure rocks experience rapid cooling due to the influence of drilling fluid or injected water. This abrupt temperature change inevitably induces thermal damage to the rock mass, thereby impacting its physical and mechanical properties as well as microstructure characteristics [15][16][17][18][19]. The thermal damage is a consequence of the combined effects of mineral particle expansion and contraction, heating and water cooling, and thermophysical-chemical transformations.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Cyclic Heating and Water Cooling on Mixed-Mode I-II Fracture Characteristics of Sandstone

Zhang,

Hua,

Zhou

et al. 2024

Buildings

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In the process of underground resource extraction, deep rock masses are often subjected to cyclic-heating and water-cooling effects, which cause significant damage to the mechanical properties of rocks. In order to study the degradation mechanism of sandstone under cyclic heating and water cooling, many fracture experiments have been carried out. The effect of cyclic heating and water cooling at 200 °C on the tensile strength and the mixed-mode I-II fracture toughness of sandstone was investigated. The similarities and differences in the rock fracture characteristics and deterioration response of tensile properties are also examined. Meanwhile, the correlation between the microstructure and macroscopic fracture mechanical properties was revealed by observing the evolutionary pattern of rock microstructure. The findings demonstrate that the heating and water-cooling-induced variations in the tensile strength and fracture toughness of rock exhibit a consistent trend. The effective fracture toughness of sandstone decreases exponentially with increasing cycle times. The impact of the heating and water-cooling cycles on the fracture toughness of pure mode I is found to be more pronounced compared to that observed in mixed modes and pure mode II specimens. The failure mode of the rock sample undergoes a transition from abrupt to gradual, accompanied by an augmented development of cracks on the failure surface and finer fragmentation of rock debris. The results of this study can provide theoretical references for engineering practices such as the exploitation of geothermal resources and hydraulic fracturing.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Cyclic Heating and Water Cooling on Mixed-Mode I-II Fracture Characteristics of Sandstone

Zhang,

Hua,

Zhou

et al. 2024

Buildings

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An improved rock damage model from a cyclic temperature – triaxial loading experiment for compressed air energy storage caverns

Yu,

Shen,

et al. 2025

Engineering Geology

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Effects of Different Cooling Treatments on Heated Granite: Insights from the Physical and Mechanical Characteristics

Liang,

Huang,

Huang

et al. 2024

Materials

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The exploration of Hot Dry Rock (HDR) geothermal energy is essential to fulfill the energy demands of the increasing population. Investigating the physical and mechanical properties of heated rock under different cooling methods has significant implications for the exploitation of HDR. In this study, ultrasonic testing, uniaxial strength compression experiments, Brazilian splitting tests, nuclear magnetic resonance (NMR), and scanning electron microscope (SEM) were conducted on heated granite after different cooling methods, including cooling in air, cooling in water, cooling in liquid nitrogen, and cycle cooling in liquid nitrogen. The results demonstrated that the density, P-wave velocity (Vp), uniaxial compressive strength (UCS), tensile strength (σt), and elastic modulus (E) of heated granite tend to decrease as the cooling rate increases. Notably, heated granite subjected to cyclic liquid nitrogen cooling exhibits a more pronounced decline in physical and mechanical properties and a higher degree of damage. Furthermore, the cooling treatments also lead to an increase in rock pore size and porosity. At a faster cooling rate, the fracture surfaces of the granite transition from smooth to rough, suggesting enhanced fracture propagation and complexity. These findings provide critical theoretical insights into optimizing stimulation performance strategies for HDR exploitation.

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Mechanical properties and damage constitutive model of silty mudstone under heating and water-cooling cycles

Cited by 4 publications

References 47 publications

Experimental Study on the Effect of Cyclic Heating and Water Cooling on Mixed-Mode I-II Fracture Characteristics of Sandstone

Experimental Study on the Effect of Cyclic Heating and Water Cooling on Mixed-Mode I-II Fracture Characteristics of Sandstone

An improved rock damage model from a cyclic temperature – triaxial loading experiment for compressed air energy storage caverns

Effects of Different Cooling Treatments on Heated Granite: Insights from the Physical and Mechanical Characteristics

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