Predicting of the Unit Grouting Quantity in Karst Curtain Grouting by the Water Permeability of Rock Strata

Niu, Jiandong; Bin, Wang; Chen, Guanjun; Chen, Kang

doi:10.3390/app9224814

Cited by 10 publications

(6 citation statements)

References 18 publications

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“…The purpose of the experiment is to provide engineering support for the design and construction of large-scale curtain grouting in the future, as well as to obtain the necessary grouting data in advance. Niu et al [33] used the permeability of the rock layers to predict the amount of unit grouting of the karstic curtain grout; Fu et al [34] conducted field grouting tests and explored the spacing between the grout holes based on a reliability analysis; Liu et al [35] explored an effective method for processing water-rich sand layers through curtain grouting in key areas, forming a comprehensive grouting treatment method.…”

Section: Optimization Of the Grouting Systemmentioning

confidence: 99%

Research on Sustainable Mining and Water Prevention in Large Open-Pit Water Deposits

et al. 2023

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Due to the impacts on the ecological environment, production safety and the economic benefits of large open-pit water deposits, there is no longer a single drainage method within the pit that can be used to meet the need for further deep mining. Therefore, curtain grouting technology is proposed for use in the prevention and control of mine water. The flow control equation of slurry in vertical fissures under the influence of self-weight stress was derived, and a three-dimensional visualized laminated jointed rock grouting model was developed independently to study the slurry transport mechanism, diffusion pattern, and sealing mechanism, which verified the correctness of the control equation. Field trials of industrial curtain grouting were also carried out at the mines, and the effectiveness of curtain water blockage was tested using visual analysis, inspection hole detection, and geophysical exploration methods. The results showed that after grouting the curtain, water-conducting cracks in the formation can be filled well and sealed, and the curtain has a good water-blocking effect. A complete set of diversified value-taking grouting systems is obtained, which can ensure the development of a green, safe and sustainable mine in the future.

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Section: Optimization Of the Grouting Systemmentioning

confidence: 99%

Research on Sustainable Mining and Water Prevention in Large Open-Pit Water Deposits

et al. 2023

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“…Among them, the split grouting is the soil splits to form cracks under the action of slurry pressure, and the slurry fills the cracks and continues to split the soil around under the action of pressure, thus forming split slurry veins. Split grouting is an effective means to strengthen the poor geological body such as hard plastic clay, weathered rock and broken zone, and has been widely used in building foundation, subway tunnel, mine roadway and water conservancy and other projects [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Study on Diffusion Control Mechanism of Split Slurry Veins Based on Soil Compaction Effect

Sun,

Wang,

et al. 2023

Pol. J. Environ. Stud.

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In the process of split grouting, soil will compress the surrounding soil under the action of expansion pressure, reduce the gap between soil particles. Based on this, the stress-strain relationship model describing the nonlinear compression characteristics of soil mass was established to simplify the dynamic development process of split grouting veins. Considering the loss of grouting pressure along the path, the corresponding relationship between the set value of the first sequence grouting circle cake pulse diffusion radius r max1 and the set value of grouting pressure p 0 was obtained, and the corresponding calculation method of grouting time was obtained. Under the condition that the previous sequence grouting changes the distribution direction of the major and minor ground stress, the corresponding relation between the secondary grouting diffusion radius r max2 and the set value of grouting pressure p′ 0 and the calculation method of grouting time are obtained. The model test of split grouting is carried out, and the test results show that the vertical split grouting can be achieved by setting the target pressure and grouting time after the horizontal split grouting and the direction of the ground stress change, which verifies the rationality of the theory.

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“…In recent years, grouting has been widely applied in underground engineering [2]. However, as grouting projects are concealed by soil, the diffusion law and reinforcement mechanism of the slurry after entering the rock-soil body cannot be directly observed [3]. In addition, different stratum conditions have different impacts on the grouting reinforcement mechanism and grouting effect.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Split Grouting Reinforcement Mechanism in Filling Medium and Effect Evaluation

Niu

et al. 2020

Sensors

Self Cite

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In view of the deficiency of the split grouting theory for the filling area, a 3D simulated grouting test system was designed to explore the slurry diffusion law, reinforcement mechanism of split grouting in a filling soil, and effect of grouting reinforcement. The test system included an experiment bench system, grouting system, and information monitoring system, using which experimental research on split grouting in a filling soil was conducted. The grouting model experiment procedure was introduced first, following which the diffusion rule of slurry in the filling medium and the reinforcement mechanism of split grouting were analyzed according to the properties and distribution characteristics of grouting veins after grouting reinforcement. Finally, a uniaxial compression test, light dynamic contact test, permeability test, and laboratory geotechnical test were conducted on the soil before and after grouting. The relationship between the zoning characteristics of different properties of veins and the mechanical properties of filling soil were discussed. The results showed that there were three types of grouting veins: trunk grouting, branch grouting, and permeable grouting. The injected soil body was strengthened by the three-stage grouting vein network of the mentioned vein types and the compaction between soils. After the grouting, the uniaxial compressive strength of the filling soil increased by an average of 186%, and the permeability coefficient decreased by an average of 47 times. The cohesion and internal friction angle increased by 45.3% and 44.9%, respectively. Additionally, density, water content, and other indicators of filling were improved. The bearing characteristics reflected by a dynamic contact test were consistent with the distribution of grouting veins. The research results offer significant guidance for the reinforcement mechanism of split grouting and the evaluation of the grouting effect.

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Predicting of the Unit Grouting Quantity in Karst Curtain Grouting by the Water Permeability of Rock Strata

Cited by 10 publications

References 18 publications

Research on Sustainable Mining and Water Prevention in Large Open-Pit Water Deposits

Research on Sustainable Mining and Water Prevention in Large Open-Pit Water Deposits

Study on Diffusion Control Mechanism of Split Slurry Veins Based on Soil Compaction Effect

Experimental Study of Split Grouting Reinforcement Mechanism in Filling Medium and Effect Evaluation

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