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| Quantitative approach，cloud system and engineering practice for global stability assessment of surrounding rock in underground caverns |
| XU Dingping1，JIANG Quan1，LI Shaojun1，LIU Xiuyang1，2，HUANG Shuling3，QIU Shili1，
FENG Guangliang1，ZHENG Hong1 |
| (1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. University of Chinese Academy of Sciences，Beijing 100049，China；
3. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，
Yangtze River Scientific Research Institute，Wuhan，Hubei 430010，China) |
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Abstract With the rapid development of underground rock mass engineering，the quantitative assessment of surrounding rock stability of underground caverns has become a major concern in the current academic and engineering communities. However，there is no quantitative standard for the assessment and classification of the global stability of surrounding rock in underground caverns. Therefore，this paper proposes a quantitative assessment approach for the global stability of the hard surrounding rock in underground caverns. The quantitative assessment approach integrates the results of engineering geological investigation，numerical simulation and field monitoring and takes the rating system as the basic framework. The quantitative assessment approach incorporates the influence of basic quality of surrounding rock，in situ stress，unfavourable geological structures，cavern dimension and layout，construction factors and groundwater on the global stability of surrounding rock. Based on the basic principle and the flow chart of this assessment approach，a cloud assessment system for the stability of surrounding rock in underground caverns is developed. The assessment system helps users to quickly and effectively determine the global stability of the surrounding rock in underground caverns and guides engineering practice. The quantitative assessment approach and cloud system are applied to assess the global stability of surrounding rocks in numerous underground caverns within many industries. The reliability and applicability of the approach and system are verified.
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2022, Vol. 41 
