Dynamic Response of a Non-Darcian Seepage System in the Broken Coal of a Karst Collapse Pillar

Zhang, Tianjun; Pang, Mingkun; Ji, Xiang; Pan, Hongyu

doi:10.1007/s10230-021-00760-8

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Therefore, it is of great engineering significance to identify the fluid motion state and study its transformation mechanism for evaluating the water inrush disaster and forecasting the water inrush quantity. Due to the diversity of rock media, the flow pattern transformation in fractured or porous rock mass media is extremely complicated, and the temporal and spatial characteristics of flow regime transformation are difficult to be broken through (Kong et al 2021;Zhang et al 2021b).…”

Section: Outline Of the Seepage Mechanism Of Water Inrushmentioning

confidence: 99%

“…To understand the mining disturbance-induced water inrush, some researchers (Shi et al 2016;Yang et al 2018aYang et al , 2008 Scientists (Huang et al 2018a;Kundu et al 2016;Zhang et al 2021b) also studied the seepage state transformation in the broken rock media from the perspective of parameter variation. Kundu et al (2016) regarded broken rocks as a kind of isotropic media with different porosity, and discussed the transform point of seepage state based on the parameter evolution.…”

Section: Modelling and Numerical Studymentioning

confidence: 99%

“…Kundu et al (2016) regarded broken rocks as a kind of isotropic media with different porosity, and discussed the transform point of seepage state based on the parameter evolution. By the numerical analysis of the seepage system in broken coal media, Zhang et al (2021b) concluded that the water inrush disaster from KCP can be indicated by the mutation of the seepage parameter, and demarcated the limited value of the non-Darcy coefficient β c . It is summarized that when this coefficient is less than β c , any slight variation of parameters may lead to water inrush.…”

Section: Modelling and Numerical Studymentioning

confidence: 99%

See 2 more Smart Citations

A state-of-the-art review on rock seepage mechanism of water inrush disaster in coal mines

Duan

Zhang

et al. 2022

Int J Coal Sci Technol

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Water inrush is one of the most dangerous disasters in coal mining. Due to the large-scale mining and complicated hydrogeological conditions, thousands of deaths and huge economic losses have been caused by water inrush disasters in China. There are two main factors determining the occurrence of water inrush: water source and water-conducting pathway. Research on the formation mechanism of the water-conducting pathway is the main direction to prevent and control the water inrush, and the seepage mechanism of rock mass during the formation of the water-conducting pathway is the key for the research on the water inrush mechanism. This paper provides a state-of-the-art review of seepage mechanisms during water inrush from three aspects, i.e., mechanisms of stress-seepage coupling, flow regime transformation and rock erosion. Through numerical methods and experimental analysis, the evolution law of stress and seepage fields in the process of water inrush is fully studied; the fluid movement characteristics under different flow regimes are clearly summarized; the law of particle initiation and migration in the process of water inrush is explored, and the effect of rock erosion on hydraulic and mechanical properties of the rock media is also studied. Finally, some limitations of current research are analyzed, and the suggestions for future research on water inrush are proposed in this review.

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Section: Outline Of the Seepage Mechanism Of Water Inrushmentioning

confidence: 99%

Section: Modelling and Numerical Studymentioning

confidence: 99%

Section: Modelling and Numerical Studymentioning

confidence: 99%

See 1 more Smart Citation

A state-of-the-art review on rock seepage mechanism of water inrush disaster in coal mines

Duan

Zhang

et al. 2022

Int J Coal Sci Technol

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Water–rock two-phase flow model for water inrush and instability of fault rocks during mine tunnelling

Ma,

Duan,

et al. 2023

Int J Coal Sci Technol

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Water inrush hazard is one of the major threats in mining tunnel construction. Rock particle migration in the seepage process is the main cause of water inrush pathway and rock instability. In this paper, a radial water–rock mixture flow model is established to study the evolution laws of water inrush and rock instability. The reliability of the proposed model is verified by the experimental data from a previous study. Through the mixture flow model, temporal-spatial evolution laws of different hydraulic and mechanical properties are analysed. And the proposed model’s applicability and limitations are discussed by comparing it with the existing water inrush model. The result shows that this model has high accuracy both in temporal evolution and spatial distribution. The accuracy of the model is related to the fluctuation caused by particle migration and the deviation of the set value. During the seepage, the porosity, permeability, volume discharge rate and volume concentration of the fluidized particle increase rapidly due to the particle migration, and this phenomenon is significant near the fluid outlet. As the seepage progresses, the volume concentration at the outlet decreases rapidly after reaching the peak, which leads to a decrease in the growth rate of permeability and porosity, and finally a stable seepage state can be maintained. In addition, the pore pressure is not fixed during radial particle migration and decreases with particle migration. Under the effect of particle migration, the downward radial displacement and decrease in effective radial stress are observed. In addition, both cohesion and shear stress of the rock material decreased, and the rock instability eventually occurred at the outlet.

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Compaction and seepage characteristics of broken coal and rock masses in coal mining: A review in laboratory tests

Zhang,

Chen,

Ren

et al. 2024

Rock Mechanics Bulletin

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Dynamic Response of a Non-Darcian Seepage System in the Broken Coal of a Karst Collapse Pillar

Cited by 3 publications

References 18 publications

A state-of-the-art review on rock seepage mechanism of water inrush disaster in coal mines

A state-of-the-art review on rock seepage mechanism of water inrush disaster in coal mines

Water–rock two-phase flow model for water inrush and instability of fault rocks during mine tunnelling

Compaction and seepage characteristics of broken coal and rock masses in coal mining: A review in laboratory tests

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