Understanding water inrush hazard of weak geological structure in deep mine engineering: A seepage-induced erosion model considering tortuosity

Ma, Dexin; Li, Qiang; Cai, Ke-chuan; Zhang, Jixiong; Li, Zhenhua; Hou, Wentao; Sun, Qiang; Li, Meng; Du, Feng

doi:10.1007/s11771-023-5261-4

Cited by 22 publications

(6 citation statements)

References 20 publications

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“…Additionally, the mechanical properties of deep-buried rock mass are evidently different from that of superficial rock mass [7,8]. High-intensity deep coal mining inevitably causes disasters, e.g., rockbursts, water inrush, coal and gas outbursts, and roof-fall accidents [9][10][11][12][13][14][15][16]. Mining-induced disasters destroy underground structures and equipment and threaten the safety of underground workers.…”

Section: Introductionmentioning

confidence: 99%

Applications of Microseismic Monitoring Technique in Coal Mines: A State-of-the-Art Review

Liu,

Wang,

Kou

et al. 2024

Applied Sciences

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China’s coal mines have to extend to greater depths for the exploitation of more mineral resources, and they have suffered catastrophic mining-induced disasters, such as rockbursts, water inrushes, coal and gas outbursts, and roof fall accidents. The microseismic monitoring technique is a practical tool for mine safety management, which is extensively utilized in many Chinese coal mines. Microcracks of coal/rock masses are recorded as microseismicities in the field, and the potential mining-induced instabilities can be assessed by in-depth analysis of the microseismic parameters. This study provides a state-of-the-art review of the achievements and developments of the microseismic monitoring technique in coal mines. It also presents some prospects for improving the location accuracy of microseismicity, efficient and intelligent processing of the microseismic data, comprehensive assessment of coal/rock instabilities, and development of new microseismic monitoring equipment. This study is valuable for mine safety management and may contribute to improving the deep mining production.

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Section: Introductionmentioning

confidence: 99%

Applications of Microseismic Monitoring Technique in Coal Mines: A State-of-the-Art Review

Liu,

Wang,

Kou

et al. 2024

Applied Sciences

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“…Mine water inrushes represent a significant geological hazard in underground mining [1,2]. In the context of underwater and subsea mining operations, a protective isolation layer of a specified thickness is conventionally employed as a safety barrier to segregate the mining zone from the surrounding aquatic environment [3,4].…”

Section: Introductionmentioning

confidence: 99%

Fractal Evolution Characteristics of Isolation Layers in a Submarine Gold Mine: A Case Study

Chen,

Li,

Lin

et al. 2024

Minerals

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The establishment of an isolation layer in submarine mining has been a persistent challenge. In the context of this research, we conducted a similarity simulation test to preliminarily assess the interaction between the thickness and extent of the isolation layer. Subsequently, we introduce an innovative approach that integrates fractal theory and the Bonded Block Model (BBM) to simulate undersea isolation layer mining. The validation of this method relies on on-site borehole scanning and displacement monitoring, which depict the intricate fractal evolution of fractures and predict the optimal thickness of the isolation layer. Our findings affirm the robustness and validity of this method. Evaluation of the fractal dimensions of fractures reveals that a critical threshold of 1.7 is essential to prevent structural failure of the isolation layer, while a limit of 1.5 is necessary to avoid significant water ingress. Remarkably, the correlation dimension of the settlement time series closely aligns with the fractal dimension of the fractures, underscoring the feasibility of ensuring the safety of isolation layer mining through real-time settlement monitoring.

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“…The creep model is predominantly employed to characterize the creep behavior of loosely consolidated soft rock, which is limited by its inherent strength [12]. The non-Darcy hydraulic properties and deformation behaviors of such weakly cemented rock structures, like broken gauges, were studied through laboratory, theoretical, and in-situ aspects [13,14]. The long-term mechanical properties of a weakly cemented rock mass were also studied by carrying out creep tests under different initial confining pressures, and the creep behavior of the weakly cemented rock mass was further explained [15,16].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Water-Conducting Fracture in Weakly Cemented Strata in Response to Mining Activity: Insights from Experimental Investigation and Numerical Simulation

Liu,

Zhou,

et al. 2023

Water

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The accurate prediction of the vertical extent of water-conducting fracture (WCF) zones in weakly cemented strata is particularly significant in preventing and controlling water hazards in western coal mines. The evolution of fractures in weakly cemented strata affected by mining disturbances was comprehensively analyzed by physical similarity models, numerical simulations, and field investigations. Results indicated that the development progress of water-conducting fractures can be divided into three phases: initial slow generation, subsequent rapid development, and eventual stabilization. The numerical simulation results revealed that in the initial stage of working face mining, the development of the plastic zone is limited, and there is minimal failure in the overlying strata; therefore, fractures are slowly produced without penetrating through the strata. When the plastic zone fully encompasses the entire main roof, it triggers severe shear failure in the overlying strata, resulting in rapid fracture propagation and penetration. Once the fracture height reaches a stable state, there is no further increase in the maximum vertical displacement of key strata, indicating the extensive collapse and compaction of the overburden as well as the stabilization of the fracture heights. A modified prediction equation for WCF in weakly cemented strata was obtained by correcting the traditional empirical formula based on field investigations. This modified prediction equation enhances the accuracy in predicting fracture heights and provides a theoretical reference to address the issue of the inaccurate prediction of the water-conducting fracture height in western mine rock strata.

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Understanding water inrush hazard of weak geological structure in deep mine engineering: A seepage-induced erosion model considering tortuosity

Cited by 22 publications

References 20 publications

Applications of Microseismic Monitoring Technique in Coal Mines: A State-of-the-Art Review

Applications of Microseismic Monitoring Technique in Coal Mines: A State-of-the-Art Review

Fractal Evolution Characteristics of Isolation Layers in a Submarine Gold Mine: A Case Study

Evolution of Water-Conducting Fracture in Weakly Cemented Strata in Response to Mining Activity: Insights from Experimental Investigation and Numerical Simulation

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