Terrain discontinuous deformations created near underground technical infrastructure

Szafulera, K.

doi:10.1088/1755-1315/261/1/012051

Cited by 2 publications

(1 citation statement)

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“…As the coal is extracted from the longwall mining face, the surrounding rock layers shift and fill the void left behind by the coal extraction. This process results in a series of intense movements, including the movement of rock layers between the coal seam roof and the surface, leading to surface subsidence [17,18]; the development of support pressure on both sides of the working face; and the convergence of the goaf and the roof/floor of the working face [19,20]. The basic principles of the dynamic model for coal mining proposed in this study can be applied to various aspects of ground control, such as roadway deformation, roof stability and surface subsidence above the coal mining face.…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Numerical Simulation on the Grouting Timing in Retained Rib of Pillarless Mining

Yu,

Xie,

et al. 2023

Applied Sciences

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A dynamic numerical method is established to simulate the stability of the surrounding rocks of the retained roadway in FLAC3D, along with a double-yield constitutive model to simulate the re-compaction process of gangue and a strain-softening constitutive model to simulate the strain-softening characteristic of the coal and the grouted fragmented coal after yielding. The simulation reveals that the grouting slurry diffusion range, the mining affecting the stage behind the working face and the retained coal rib deformation are closely interrelated. Under severe mining-induced stress, the integrity of the surrounding rock is more likely to be destroyed, accompanied by a large number of cracks developing and gradually expanding in the surrounding rocks. The roadway deformation increases in a rapid manner. Meanwhile, the grouting diffusing range increases gradually. The simulation conducted in this study indicates that the optimum support effect can be achieved by grouting in the section before and after the working face affected by the high mining-induced stress. A timely grouting can be used to construct an enhanced surrounding rock-bolting-grouting support system and maintain the stability of the retained roadway.

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Section: Introductionmentioning

confidence: 99%

A Dynamic Numerical Simulation on the Grouting Timing in Retained Rib of Pillarless Mining

Yu,

Xie,

et al. 2023

Applied Sciences

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Mining terrain subsidence approximation using the polynomials and a subsidence trough profile fragmentation

Orwat¹

2022

International Conference of Numerical Analysis and Applied Mathematics Icnaam 2020

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Terrain discontinuous deformations created near underground technical infrastructure

Cited by 2 publications

References 0 publications

A Dynamic Numerical Simulation on the Grouting Timing in Retained Rib of Pillarless Mining

A Dynamic Numerical Simulation on the Grouting Timing in Retained Rib of Pillarless Mining

Mining terrain subsidence approximation using the polynomials and a subsidence trough profile fragmentation

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