Full-Field Deformation and Crack Development Evolution of Red Sandstone under Impact and Chemical Erosion

Xu, Junce; Pu, Hai; Sha, Ziheng

doi:10.3390/min12081038

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…The performance of TSL is between shotcrete and wire mesh. Compared with shotcrete, TSL has the advantages of a short maintenance cycle, fast application, high tensile strength, good bonding performance, prevention of rock mass loosening, significant ability to penetrate joints, cleanliness, and easy transportation in rock reinforcement [1][2][3][4][5][6][7][8][9]. Compared with traditional rock support methods, TSL can penetrate into large cracks of the surrounding rock with its excellent flowability, and gradually fill the capillary cracks of the surrounding rock.…”

Section: Introductionmentioning

confidence: 99%

Repairing Performance of Polymer-Modified Cement-Based Thin Spray-On Liners on Pre-Cracked Rock-like Specimens

Teng,

Yu,

Wang

et al. 2024

Coatings

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With the development of coal mining and the increase in excavation depth, the stress on roadway surrounding rock is also increasing. This creates conditions for crack development in the roadway, so it is urgent to develop rock repair materials with excellent performance. The ability of thin spray-on liner (TSL) to repair rock and concrete opens up the possibility of reusing abandoned roadways. The ability of TSL to support the surrounding rock is also important in preventing the generation of roadway waste. In this paper, styrene–acrylic emulsion (SAE), vinyl acetate–ethylene copolymer emulsion (VAE), and polyvinyl alcohol powder (PVA) were used to prepare three TSLs. Rock-like materials were configured using cement mortar according to similar principles. Three types of TSLs were tested for basic properties such as viscosity and mechanical strength, which provided data to support the explanation of the repair performance of TSLs. Three TSLs were used to repair pre-cracked rock-like specimens (PR). The number of brushing times and the angle of PR’s cracks were regarded as test variables. Changes in the mechanical strength of repaired PRs were tested by compressive and flexural tests. TSL repair performance was evaluated with the help of mechanical strength changes. Results show that polyvinyl alcohol powder modified cement-based thin spray-on liner is most suitable for repairing rock cracks; as the thickness of the brush slurry increases, its repair performance continues to improve. This paper can provide experience and a theoretical basis for the research of other rock repair materials, and it is also instructive for repairing shotcrete in the roadway.

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Section: Introductionmentioning

confidence: 99%

Repairing Performance of Polymer-Modified Cement-Based Thin Spray-On Liners on Pre-Cracked Rock-like Specimens

Teng,

Yu,

Wang

et al. 2024

Coatings

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Exploring the potential of bacterial concrete: A sustainable solution for remediation of crack and durability enhancement – A critical review

Rajadesingu,

Mendonce,

Palani

et al. 2024

Construction and Building Materials

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On the onset of nonlinear fluid flow transition in rock fracture network: Theoretical and computational fluid dynamic investigation

et al. 2022

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Fluid flow regimes affect the determination of hydraulic conductivity of fractured rocks, and the critical criteria for the onset of nonlinear fluid flow transitions in discrete fracture networks (DFNs) of rocks have yet to be established. First, the factors causing the fluid flow transition regime of fracture intersections and rough surface fractures are analyzed theoretically and numerically. This reveals that the fluid flow regime is governed by the fracture aperture, density of fracture intersections, surface roughness, and Reynolds number ( Re). Then, these identified parameters are redefined in DFN models, and their influence on the onset of nonlinear fluid flow is further investigated by performing computational fluid dynamic analysis. The results show that the fracture intersection and aperture play a more significant role in the linear-to-nonlinear fluid flow transition than the fracture aperture heterogeneity. With the increase in fracture aperture, unevenness of fracture surfaces and connectivity of DFNs, the onset of nonlinear fluid flow appeared at the lower flow velocity. With the Forchheimer equation, it is found that the critical hydraulic gradient Jc, defined as the hydraulic gradient at which inertial effects assume 10% of the total pressure loss, is highly correlated with the fracture aperture, fracture intersection and roughness of the surface. Finally, the mathematical expression of Jc and the Forchheimer coefficients are formulated based on the regression analysis of fluid dynamic computation results, which provides an approach to determine whether the cubic law should be applied as governing equations for the computation of fluid flow in DFNs.

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Full-Field Deformation and Crack Development Evolution of Red Sandstone under Impact and Chemical Erosion

Cited by 5 publications

References 27 publications

Repairing Performance of Polymer-Modified Cement-Based Thin Spray-On Liners on Pre-Cracked Rock-like Specimens

Repairing Performance of Polymer-Modified Cement-Based Thin Spray-On Liners on Pre-Cracked Rock-like Specimens

Exploring the potential of bacterial concrete: A sustainable solution for remediation of crack and durability enhancement – A critical review

On the onset of nonlinear fluid flow transition in rock fracture network: Theoretical and computational fluid dynamic investigation

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