Calculation of thermal stress during the cooling of lava tubes

doi:10.7523/j.issn.2095-6134.2016.03.019

›› 2016, Vol. 33 ›› Issue (3): 412-420.DOI: 10.7523/j.issn.2095-6134.2016.03.019

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Calculation of thermal stress during the cooling of lava tubes

LI Zhencun¹, SHI Yaolin¹, ZHANG Zeyang², DONG Peiyu¹, YANG Shaohua¹

1. Key Laboratory of Computational Geodynamics, University of Chinese Academy of Sciences, Beijing 100049,China;
2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Received:2015-09-08 Revised:2015-12-29 Online:2016-05-15

Abstract

Abstract:

In addition to the direct disasters during the volcano eruption, some lava tubes often form in the course of the flow of basic magma. The existence of underground empty caves near the lava tubes reduces the stability of the earth's surface, and then secondary disasters may happen. The lava tubes found on the Moon and Mars not only can be used for further research, but also have been proved to be the best places to build detection base in future. Using the finite element method and based on the formation of the lava tubes, we establish the temperature evolution and the corresponding displacement and thermal stress field conditions. Furthermore, we determine the effects, on the stability of the lava tubes, of different physical parameters (the lava tube size, depth, and shape) by means of analyzing the evolution course of the principal stress.

Key words: lava tubes, volcanic hazard, thermal stress, finite element method calculation

CLC Number:

P317.9
P554

LI Zhencun, SHI Yaolin, ZHANG Zeyang, DONG Peiyu, YANG Shaohua . Calculation of thermal stress during the cooling of lava tubes[J]. , 2016, 33(3): 412-420.

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Calculation of thermal stress during the cooling of lava tubes

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