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Analysis of Creep Characteristics of Shallow Mined-Out Areas Roof under Low Stress Conditions

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Abstract:

Under low stress conditions, when the load exerting on the mined-out areas roof is less than the rock long-term strength, the rock roof will generate some creep deformation. In order to prevent the roof of the mined-out areas suddenly collapse, and to ensure the operator and construction equipment above the mined-out areas safety, it is an important security technical problem to reveal the creep characteristics of the shallow mined-out areas roof. Taking the mined-out areas of Antaibao Surface Mine as background, considering the rheological properties of rock roof, and assuming the roof was a rectangular thick plate, the creep characteristics of mined-out areas roof were analysed by applying the thick plate theory and Kelvin creep model. The regression equation of the roof deflection increment over time was given, and the creep characteristics of the shallow mined-out areas roof were revealed also.

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Periodical:

Applied Mechanics and Materials (Volumes 105-107)

Pages:

832-836

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.105-107.832

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Cite this paper

Online since:

September 2011

Authors:

Shu Ren Wang, Hui Hui Jia

Keywords:

Creep Effect, Deflection, Mined-Out Areas, Surface Mine, Thick Plate Theory

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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