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• W3045712103 endingPage "405" @default.
• W3045712103 startingPage "390" @default.
• W3045712103 abstract "Abstract In order to effectively predict and control the rib spalling and roof leakage, it is necessary to reveal the deformation and failure mechanism of the chamber and propose the corresponding surrounding rock control technology. Based on uniaxial compression experiments and numerical simulations, it is concluded that coal body damage is dominated by shear failure during uniaxial compression, which indicates to some extent the main form of damage of the surrounding rock in the chamber. Then the combined finite and discrete element method is used to establish a numerical model to reveal the evolution law of fracture in the surrounding rock. The simulation results show that after the excavation of the chamber, a large amount of shear failure occurred in the ribs and the roof. Then those cracks further developed, expanded, penetrated, and finally connected with the surface of the chamber. Under the effect of the mine pressure, the coal body is separated from the surface of the chamber, leading to the occurrence of rib spalling and roof leakage. So it was given that support method by controlling crack development. The grouting and high-strength anchor bolt and anchor cable are proposed to improve the shear strength of the surrounding rock, which helps to reduce the occurrence of cracks, and inhibit the cracks from interpenetrating. An industrial test was carried out in the chamber of Tashan Coal Mine, which showed good control effect of the surrounding rock in the chamber." @default.
• W3045712103 created "2020-08-03" @default.
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• W3045712103 date "2020-01-01" @default.
• W3045712103 modified "2023-10-16" @default.
• W3045712103 title "Deformation and failure mechanism of full seam chamber with extra-large section and its control technology" @default.
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• W3045712103 doi "https://doi.org/10.1515/geo-2020-0140" @default.
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