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Deformation and Failure Mechanism of Full Seam Chamber with Extra-large Section and Its Control Technology by Bingjie Huo; Yang Tai; Xiangbin Meng; Tiejun Kuang is a Earth and Planetary Sciences article available to read on EtoBox.

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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 i

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Author

Bingjie Huo; Yang Tai; Xiangbin Meng; Tiejun Kuang

Publisher

Walter de Gruyter GmbH

Published

2020

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)