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Vol. 16, Special Issue, November 2012, pp. 269-276

 

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Application of Multi-factor Fuzzy Comprehensive Evaluation in Stability of Surrounding Rock of Underground Engineering
 
1 Jinglong Li, 2 Jiachun Li, 3 Shuchen Li

1 School of Civil Engineering Shandong University, China,

Tel.: 13698608525

2 JianBang Co. LTD, China

Tel: 15865253079

3 School of Civil Engineering Shandong University, China,

Tel.: 053188399182

E-mail: lijl@sdu.edu.cn, lijiachunsd@163.com, shucaili@sdu.edu.cn

 

Received: 11 September 2012   /Accepted: 11 October 2012   /Published: 20 November 2012

Digital Sensors and Sensor Sysstems

 

Abstract: According to the particularity of the underground caverns project, improving the existing criterion and combining with the prime displacement criterion and the other criterion, the discriminant index SI of underground engineering is defined to represent the stability level of cave surrounding rock. Using analytic hierarchy process to give weight analysis of influencing factors of the cavern stability, the two-level weight can be obtained. The multi-factor fuzzy comprehensive evaluation to the stability evaluation of underground caverns is applied when cavern stability factors change. Using numerical simulation methods to give numerical simulation analysis of a variety of conditions on the project under construction or already built and the instability risk index SI can be got accordingly to build up fuzzy membership database, then output judgment vector is obtained combining with the corresponding weight matrix; Finally, according to maximum membership degree law, the stability level of the underground caverns using fuzzy level is described. The research results play a guiding role in the analysis of cavern stability when applied to practical engineering.

 

Keywords: Underground cavern group, Fuzzy evaluation, Surrounding rock stability, Multi-factor

 

 

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