A Case Study on Large Deformation Failure Mechanism of Coal given Chamber and Invention of a New Wall-Mounted Coal Bunker in Xiashijie Coal Mine with Soft, Swelling Floor Rock

Wang, Xingkai; Xie, Wei‐Chau; Jing, Shengguo; Bai, Jianbiao; Su, Zhili

doi:10.20944/preprints201710.0141.v1

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Additionally, the primary zone of deformation for the entire rock mass surrounding the bunker occurs within the coal seam section that extends into the interior of the bunker. For the construction of vertical bunkers without CFCs in coal mines with soft, expanding floor rocks, the authors of the paper 8 – 11 provide valuable references. In the paper 12 , a mechanism for preventing coal bunker blocking was described.…”

Section: Introductionmentioning

confidence: 99%

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Janoszek,

Rotkegel

2024

Sci Rep

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Underground coal storage bunkers serve as crucial infrastructural components in the coal mining industry, providing secure and accessible locations for the storage of mined coal. The interaction between stored coal and underground water in coal storage bunkers indeed poses significant challenges due to the unpredictable nature of the resulting coal-water mixture. This phenomenon is particularly prevalent in coal mines operating under water hazards, where groundwater infiltration into storage areas can lead to the formation of coal-water mixtures, altering the physical properties of the stored coal. The interaction between coal and water can result in the formation of coal-water mixtures (hydromixture), which exhibit complex rheological properties. These mixtures may vary in viscosity, density, and particle size distribution, making their behavior difficult to predict. Underground water may exert hydrostatic pressure on the stored coal, influencing its mechanical behavior and compaction properties. Changes in pressure can result in coal compaction or expansion, affecting bunker stability and the integrity of surrounding rock strata. The main goal of the paper was to determine the values of pressure field variations exerted by the flowing hydromixture within underground coal storage bunkers. This objective reflects a critical aspect of understanding the dynamic behavior of coal-water mixtures (hydromixture) under varying conditions, particularly in environments where water hazards pose significant challenges to storage and operational stability. The paper utilized computational fluid dynamics (CFD) methods to examine the changes in pressure within underground coal storage bunkers induced by the flow of coal-water mixtures. The examination of damage to an underground coal storage bunker due to stress distribution was conducted using the finite element method (FEM). This computational technique is widely utilized in engineering and structural analysis to model complex systems and predict the behavior of materials under various loading conditions The results of the CFD numerical simulation were compared with the mathematical models.

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Section: Introductionmentioning

confidence: 99%

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Janoszek,

Rotkegel

2024

Sci Rep

View full text Add to dashboard Cite

show abstract

Coupled CFD-FEM Analysis of the Damage Causes of the Retention Bunker: A Case Study at Hard Coal Mine

Janoszek,

Rotkegel

2024

Preprint

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Underground coal storage bunkers are built to equalize coal output, guarantee continuity of the excavated coal transport, and store coal at the point where the nature of the transport changes from continuous to periodic. The physical properties of stored coal in underground coal storage bunkers are unpredictable and prone to sudden changes, especially for the coal mines that operate under water hazards. Interaction with underground water changes the state of solid coal and forms a coal-water mixture. The hydromixture radically changes the conditions of internal hydrostatic loading. The main goal of the paper was to determine the values of pressure field variations exerted by the flowing hydromixture. The influence of the internal pressure loading change on the stress distribution in the underground coal storage bunker was tested. The changes in the underground coal storage bunker's pressure caused by the flow of hydromixture were examined using the computational fluid dynamics (CFD) method. The damage to an underground coal storage bunker due to stress distribution was examined using the finite element method (FEM). The results of the CFD numerical simulation were compared with the mathematical models.

show abstract

A Case Study on Large Deformation Failure Mechanism of Coal given Chamber and Invention of a New Wall-Mounted Coal Bunker in Xiashijie Coal Mine with Soft, Swelling Floor Rock

Cited by 2 publications

References 15 publications

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Coupled CFD-FEM analysis of the damage causes of the retention bunker: a case study at hard coal mine

Coupled CFD-FEM Analysis of the Damage Causes of the Retention Bunker: A Case Study at Hard Coal Mine

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