Cusp Catastrophe Models and Instability Mechanism of Underground Cavern'S Roof

被引：0

作者：

Jiang Xue-liang ^{[1
]}

Yang Hui ^{[1
]}

机构：

[1] Cent S Univ Forestry & Technol, Sch Civil Engn & Mech, Changsha 410004, Hunan, Peoples R China

来源：

ADVANCES IN BUILDING MATERIALS, PTS 1-3 | 2011年 / 261-263卷

关键词：

underground spherical cavity; tunnel; roof of underground carven; catastrophe models;

D O I：

10.4028/www.scientific.net/AMR.261-263.1419

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The underground caverns were divided into underground spherical cavity and underground tunnel. From bean-slab theory and energy principle, the catastrophe models of underground spherical cavity and tunnel were built and the necessary and sufficient condition of roof failure was derived. Taken the cavern roof of Wenfu phosphate mine for example, the minimum thickness of roof was derived. The analysis of spherical cavity shows that the roof fails more easily when the roof thickness is smaller, the elastic modulus is smaller, the Poisson's ratio is smaller and the roof span and loads are bigger. The analysis of tunnel roof shows that the stability of tunnel roof is closely related to the vertical load and the horizontal load. In order to guarantee the roof stability, the observation of load acted on roof should be reinforced and some control measures should be taken according to the necessary and sufficient condition of roof failure.

引用

页码：1419 / 1423

页数：5

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