A fully coupled thermo-hydro-mechanical model including the determination of coupling parameters for freezing rock

Huang, Shibing; Liu, Quansheng; Cheng, Aiping; Liu, Yanzhang; Li, Guofeng

doi:10.1016/j.ijrmms.2018.01.029

Cited by 83 publications

(26 citation statements)

References 26 publications

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“…e thermal conductivity K refers to the heat passing through the unit area soil per unit time under the unit gradient. e thermal conductivity inside the porous media by the volume weighted average method [7,22,23] is…”

Section: The Coupled Hydrothermal Modelmentioning

confidence: 99%

“…Water seepage in porous media is assumed to satisfy Darcy's law. And the rate of water seepage V → in porous media is [21][22][23]…”

Section: Water Flow Field Equationmentioning

confidence: 99%

“…Lin et al [21] addressed the difficult closure of a frozen wall in a coal Mine shaft due to excessive seepage velocity in an aquifer when the aquifer is penetrated via the artificial freezing method. Huang et al [22][23][24] developed a hydrothermal coupling model to simulate the influence of water flow on the freezing process by considering the water/ice phase transition and combined the model with the Nelder-Mead simplex method based on the COMSOL Multiphysics platform. e position of the freezing pipes around the circular tunnel was optimized.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Formation Law of the Freezing Temperature Field of Freezing Shaft Sinking under the Action of Large-Flow-Rate Groundwater

Wang

Rong

Lin

et al. 2019

Advances in Materials Science and Engineering

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Taking into account moisture migration and heat change during the soil freezing process, as well as the influence of absolute porosity reduction on seepage during the freezing process, we construct a numerical model of hydrothermal coupling using laws of conservation of energy and mass. The model is verified by the results of large-scale laboratory tests. By applying the numerical calculation model to the formation of artificial shaft freezing temperature fields under the action of large-flow groundwater, we conclude that groundwater with flow rates of less than 5 m/d will not have a significant impact on the artificial freezing temperature field. The maximum flow rates that can be handled by single-row freezing pipes and double-row freezing pipes are 10 m/d and 20 m/d, respectively, during the process of freezing shaft sinking. By analyzing the variation of groundwater flow rate during freezing process, we find that the groundwater flow velocity can reach 5–7 times the initial flow velocity near the closure moment of the frozen wall. Finally, in light of the action characteristics of groundwater on the freezing temperature field, we make suggestions for optimal pipe and row spacing in freezing pipe arrangement.

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Section: The Coupled Hydrothermal Modelmentioning

confidence: 99%

“…Water seepage in porous media is assumed to satisfy Darcy's law. And the rate of water seepage V → in porous media is [21][22][23]…”

Section: Water Flow Field Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on the Formation Law of the Freezing Temperature Field of Freezing Shaft Sinking under the Action of Large-Flow-Rate Groundwater

Wang

Rong

Lin

et al. 2019

Advances in Materials Science and Engineering

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“…Therefore, rock samples containing flaws under F-T cycle and compressions have drawn deep attentions recently. Huang et al [25] studied the shear strength characteristics of joints in three types of rock and revealed the influences of F-T on the strength parameters. Huang et al [26] proposed a coupled thermohydromechanical model to study the frost heaving strain in preexisting flaw, and the influences of temperature and pore water/ice pressure on frost heaving strain have been studied.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Crack Coalescence Behaviors for Granite Containing Two Flaws Induced by Cyclic Freeze-Thaw and Uniaxial Deformation in Beizhan Iron Mining, Xinjing, China

Wang

2020

Geofluids

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This work is aimed at investigating the effect of freeze-thaw (F-T) cycle on the crack coalescence behavior for granite samples containing two unparallel flaws under uniaxial compression. The flaw geometry in the samples was a combination of an upper inclined flaw with a horizontal flaw underneath. After the uniaxial compression experiments, macroscopic crack pattern description and the mesoscopic posttest CT imaging were used to reveal the effects of F-T cycle on the crack coalescence morphology at the rock bridge area. Results show that the stress–strain curves present a fluctuating growth trend and stress drop phenomenon becomes weaker with increasing F-T cycles. In addition, three different kinds of cracks (tensile-wing cracks, oblique shear cracks, and antiwing cracks) were observed, and the crack coalescence pattern was influenced by the F-T cycles and approach angle. A mix of tensile and shear failure occurs for the sample subjected to weak F-T treatment, and simple tensile failure occurs for the sample subjected to high F-T treatment. Moreover, CT imaging reveals a crack network pattern at the rock bridge area, and it is found that the fracture degree deceases with increasing F-T cycles and increases with the increasing approach angle. It suggests that the rock bridge area can be easily fractured for the sample subjected to high F-T cycles. Results of this study can provide theoretical foundation for the instability predication of fractured rock structures in cold regions.

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“…e coupling effect contains deformation and failure of the rock and soil and flow characteristics from the fluid. erefore, we mainly study the evolution mechanism of mechanical behavior and seepage trait after rock and soil failure with fluid flowing [2,3]. Many fields of engineering technology would relate the fluid-solid problems such as mining engineering, petroleum engineering, hydraulic and hydro-power engineering, and so on.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Simulation Material for Water‐Resisting Soil Layer in Mining Physical Simulation

Yang

Zhang

2020

Advances in Materials Science and Engineering

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This paper focuses on the failure mechanism of a water-resisting soil layer with both coal excavation and seepage effect. Being taken the simulation principle of fluid-solid coupling as the research basis, we have established a new kind of experimental material for fluid-solid physical simulation (FPS). The material adopts river sand and clay as the aggregates, besides engine oil and low-temperature grease that are used as the gelatinizing agents. According to the relevant property testing on the experimental material, the mechanical parameters and seepage parameters of the material totally match the parameters of the soil layer, which satisfy requirements of the fluid-solid coupling experiment. Simultaneously, we have solved abundant material property problems, such as the material disintegration with water and visuality of water seepage in the simulation. Next, we have built up the FPS model to simulate coal excavation under water-bearing strata with the specific material. The results indicated that in the FPS, movement and failure mechanism of the water-resisting soil layer agree with the in-situ monitoring results. In addition, the revolution law of a mining-induced crack is also fitting the actual data. The mechanism of submarine seepage and its parameters on the material and the prototype are similar. All research results would be necessary for controlling mining-induced destroying of clay water-resisting property. Meanwhile, the model demonstrates that selection of the material and coupling parameters is valid. Finally, we can alter the material matching to obtain the layer materials with various characteristics, which would be applied in extensive experiments for studying soil layer failure and seepage simulation.

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A fully coupled thermo-hydro-mechanical model including the determination of coupling parameters for freezing rock

Cited by 83 publications

References 26 publications

Study on the Formation Law of the Freezing Temperature Field of Freezing Shaft Sinking under the Action of Large-Flow-Rate Groundwater

Study on the Formation Law of the Freezing Temperature Field of Freezing Shaft Sinking under the Action of Large-Flow-Rate Groundwater

Investigation on Crack Coalescence Behaviors for Granite Containing Two Flaws Induced by Cyclic Freeze-Thaw and Uniaxial Deformation in Beizhan Iron Mining, Xinjing, China

Experimental Research on Simulation Material for Water‐Resisting Soil Layer in Mining Physical Simulation

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