Diffusion Mechanism of Slurry during Grouting in a Fractured Aquifer: A Case Study in Chensilou Coal Mine, China

Zhai, Minglei; Ma, Dan; Bai, Haibo

doi:10.3390/math10081345

Cited by 7 publications

(3 citation statements)

References 41 publications

(51 reference statements)

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“…The filtration effect in the slurry infiltration process is an essential factor affecting slurry diffusion [15][16][17]. The main research methods include four [18]: a macro model based on macro experimental phenomena, the study of the analysis method of single particle trajectory of suspension, the method of studying congestion through probability, and the mesh model method.…”

Section: Introductionmentioning

confidence: 99%

Grouting mechanism and experimental study of goaf considering filtration effect

Zhu

Ouyang

et al. 2023

PLoS ONE

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The filtration effect significantly affects the gangue slurry velocity and concentration, making it difficult to evaluate the gangue slurry diffusion range. Based on the Darcy seepage law, a seepage theoretical calculation model is established considering the filtration time and space effect. And the "water-cement ratio change matrix" in the seepage process of coal gangue slurry is deduced, revealing the basic mechanism of the porous media filtration effect, and the water-cement ratio gradually increases in the seepage process of gangue slurry. The visual test platform for slurry diffusion in goaf was independently developed for testing. The active heating optical fiber method (AHFO) was used to monitor the flow and diffusion of coal gangue slurry in the collapse zone of goaf, and the gravity gradient and water cement ratio of slurry in goaf were measured. The law of particle sedimentation in the gangue slurry flow process under the filtration effect was revealed, and engineering verification was carried out. The results show that the average slope of the gangue slurry in the gangue accumulation is 6.34%, and the overall flow law of the gangue slurry in the goaf is the first longitudinal expansion and then transverse diffusion. The water-cement ratio near the grouting mouth is smaller than the initial water-cement ratio, the near-end water-cement ratio is smaller, and the far-end water-cement ratio is larger. During on-site filling, the accumulated grouting volume of a single hole is 700 m3, and the gangue slurry diffusion distance is greater than 45m, indicating that the gangue slurry has good fluidity.

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Section: Introductionmentioning

confidence: 99%

Grouting mechanism and experimental study of goaf considering filtration effect

Zhu

Ouyang

et al. 2023

PLoS ONE

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“…Based on fractional Brownian motion, Liu Yang et al [2] established a numerical model of rough fracture grouting in rock mass through COMSOL numerical simulation software, and analyzed the influence of slurry viscosity and fracture surface roughness on slurry diffusion. M Zhai [3] studied the mechanism of mud diffusion in horizontal fractures of fractured aquifers by establishing a theoretical model. Zhang Guohua et al [4] described the diffusion law slurry in inclined plane fractures by the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanism and simulation of slurry diffusion in fractured rock mass based on detour effect

Lu,

Ni,

2023

J. Phys.: Conf. Ser.

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The grout diffusion law and grouting effect of fractured rock mass are affected by the roundabout effect. In this paper, based on the power law fluid theory, the formula of slurry diffusion mechanism in fractured rock mass considering the circuitous effect is derived; Further, based on COMSOL numerical simulation software, the influence of grouting pressure and grouting time on the slurry diffusion range is studied; Finally, through comparative analysis, the correctness and feasibility of the theoretical analysis are verified based on the numerical simulation results. The research results can provide theoretical reference and technical support for the design and construction of grouting engineering.

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“…The results showed that the formulas for the grouting parameters always depended upon the roughness and shear movement, which play a key role in grouting. Zhai et al (2022) established a one-dimensional theoretical model of seepage and grouting that considers the temporal and spatial variation in slurry viscosity at a constant grouting rate. Sui et al (2015) investigated the effects of four factors, namely, fracture aperture width, slurry gel time, dynamic water flow rate and grouting volume, on grouting by using the single fracture model in orthogonal tests and summarized the criteria for the plugging effect of grouting.…”

Section: Introductionmentioning

confidence: 99%

Study on the diffusion law of dynamic water grouting in fracture with slurry-rock stress coupling effect

Liu,

Wang,

Sui

et al. 2023

Environ Earth Sci

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Water inrush disasters in geotechnical engineering are mainly caused by seepage in fractures, and curtain grouting is the most common method to block water flow. To ensure the effectiveness of the water blocking curtain, it is necessary to study the diffusion pattern of the slurry. In this study, by means of laboratory experiments and theoretical deductions, the grout diffusion morphology in fractures with the slurry-rock stress coupling effect is revealed, and the corresponding theoretical model is established.First, based on the failure of a water curtain in a hydropower project in Yunnan Province, a four-level four-factor orthogonal table was set up, grouting experiments were conducted by using the selfdeveloped fracture grouting device, and the relationship between the main influencing factors and fracture deformation and grout diffusion distance was revealed by variance analysis. Then, based on the Bingham fluid constitutive model, the fracture deformation equation and the grouting model with flowing water, a new fracture grouting model considering the coupling effect of slurry-rock stress was established.Finally, based on the calculations and experiments, the morphology of slurry diffusion is described, thereby proving the validity of the new model.

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Diffusion Mechanism of Slurry during Grouting in a Fractured Aquifer: A Case Study in Chensilou Coal Mine, China

Cited by 7 publications

References 41 publications

Grouting mechanism and experimental study of goaf considering filtration effect

Grouting mechanism and experimental study of goaf considering filtration effect

Study on the mechanism and simulation of slurry diffusion in fractured rock mass based on detour effect

Study on the diffusion law of dynamic water grouting in fracture with slurry-rock stress coupling effect

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