Hydro-Mechanically Coupled Numerical Modelling of Protective Water Barrier Pillars in Underground Coal Mines in India

Galav, Ankush; Singh, Gurmohan; Sharma, Sanjay K.

doi:10.1007/s10230-023-00946-2

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…Under normal conditions, the technology for guarantying the safety of distributed underground water storage in coal mines is relatively mature [19]. For example, based on the actual conditions of the underground water storage in coal mines, relevant indicators and monitoring sensors are arranged to analyze key parameters, such as the stability of the reservoir's weak areas, leakage, water level, water quality, water quantity, and dam stresses and strains [20,21]. Utilizing information monitoring technologies, the stability indicators for the dam can be monitored in real time [22].…”

Section: Introductionmentioning

confidence: 99%

Seismic Safety Analysis of Interlaminar Rock Mass in the Distributed Underground Reservoir of a Coal Mine

Zhang,

Cao,

Wang

et al. 2024

Water

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This study focuses on the seismic safety of distributed underground reservoirs in coal mines, especially in scenarios involving the establishment of multiple reservoirs within the same mining area, spanning different coal seams. Dynamic similarity model tests and numerical simulations are employed to investigate the construction and operation of these reservoirs under extreme conditions, such as mine tremors or earthquakes. Utilizing the Daliuta coal mine underground reservoir as a case study, a similarity material model test platform is established to represent both upper and lower coal mine underground reservoirs. Stability tests are conducted on the interlayer rock mass under various levels of seismic intensity, and the safety of the interlayer rock mass at different safety distances is comparatively analyzed. Meanwhile, using the finite element method, the responses of the upper and lower coal mine underground reservoirs under different seismic intensity levels are simulated with the same conditions of model tests. Through the two types of simulations, the mechanical response and safety of the surrounding rock of the Daliuta coal mine underground reservoir under the influence of different seismic intensities are systematically analyzed, and the reasonable safety distances between the upper and lower reservoirs are obtained. This study provides a valuable scientific insight into the safe design of underground reservoir embankments in coal mines.

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Section: Introductionmentioning

confidence: 99%

Seismic Safety Analysis of Interlaminar Rock Mass in the Distributed Underground Reservoir of a Coal Mine

Zhang,

Cao,

Wang

et al. 2024

Water

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Development of a Three-Dimensional Visual Simulation Test and Experiment on Water Inrush Evolution in the Floor Area

Zhang,

Song,

et al. 2024

Geotechnical Testing Journal

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The catastrophic evolution of damage fractures and seepage in surrounding rocks under coupled actions significantly impacts the safety of rock mass engineering, such as mining and tunnel construction. To address this, we developed a test platform to observe the spatiotemporal evolution of water inrush from the floor of a mining coal seam. The platform comprises a test bench, servo loading system, water pressure control system, flexible loading system, and intelligent monitoring system. This setup enables flexible loading during overlying rock movement, conducts three-dimensional simulation tests on mining water inrush solid-flow coupling, simulates various crustal stresses, quantitatively monitors water inrush flow and pressure in specific floor areas in real time, and observes the entire process of water inrush crack formation. Using this system and nonhydrophilic similar simulation materials, we conducted experimental simulations on pressurized water inrush in the floor after coal seam mining. We analyzed the visual fracture development process of the floor, the distribution characteristics of water gushing flow in the floor area, and the sudden changes in instant water inrush and stress variation law of the water-resisting layer in the floor. The test results vividly illustrate the catastrophic process of water inrush in the coal seam floor. Our study reveals that, under the combined effects of water, rocks, and stresses, coal mine floor crack expansion exhibits periodic changes. The flow sensor demonstrates a noticeable upward trend during floor crack group expansion, allowing for early warning before water inrush disasters occur by leveraging changes in physical parameters such as flow rates and water pressures. This platform offers a novel and vital tool for addressing rock mechanics challenges in coal mining and for experimental research and testing of mine water inrush mechanisms, prevention, and control.

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Hydro-Mechanically Coupled Numerical Modelling of Protective Water Barrier Pillars in Underground Coal Mines in India

Cited by 2 publications

References 19 publications

Seismic Safety Analysis of Interlaminar Rock Mass in the Distributed Underground Reservoir of a Coal Mine

Seismic Safety Analysis of Interlaminar Rock Mass in the Distributed Underground Reservoir of a Coal Mine

Development of a Three-Dimensional Visual Simulation Test and Experiment on Water Inrush Evolution in the Floor Area

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