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中南大学学报(自然科学版)

Journal of Central South University

第42卷    第5期    总第201期    2011年5月

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文章编号:1672-7207(2011)05-1375-09
RMi岩体指标评价法优化及其应用
申艳军1,徐光黎2,朱可俊3

(1. 中国地质大学 研究生院,湖北 武汉,430074;
2. 中国地质大学 工程学院,湖北 武汉,430074;
3. 中国水电顾问集团 成都勘测设计研究院,四川 成都,610072
)

摘 要: 为了克服传统岩体质量评价方法(RMR法、Q法等)中评价参数难以确定、对质量较差岩体评价结果精度不够等缺陷,介绍RMi法中岩块单轴抗压强度σc与节理裂隙参数Jp的确定思路,对其进行优化,并将其与Hoek-Brown失效准则进行有效结合。结合工程实例对得到的围岩类别及岩体力学参数予以验证。研究结果表明:该方法参数确定简单,应用范围广,可精确地实现对不同岩体质量评价及力学参数的估算,其研究成果可为工程设计施工提供重要依据。

 

关键字: RMi法;参数优化;围岩分类;岩体力学参数估算;Hoek-Brown失效准则

Optimization of RMi rockmass quality evaluation method and
 its application
SHEN Yan-jun1, XU Guang-li2, ZHU Ke-jun3

1. Graduate School, China University of Geosciences, Wuhan 430074, China;
2. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;
3. Chengdu Hydroelectric Investigation and Design Institute, China Hydropower Consulting Group,
Chengdu 610072, China

Abstract:In order to coincide the actual performance and effectively reduce the uncertainty of rock mass parameters and the inaccurate evaluation of weakness rock mass quality by these traditional cavern rock quality evaluation methods (RMR, Q), the uniaxial compressive strength of intact rock σc and jointing parameter Jp in RMi (Rock mass index) method were introduced and optimized, and the RMi method was combined with the Hoek-Brown Failure Criterion. Then in order to test its rationality, the RMi was used to a hydropower project of the southwest in China. The results show that the evaluation parameters of this method are easily acquired by the simple indoor test and the field survey, and its engineering application is also more wider than these traditional rock quality evaluation methods. So the research achievements of the RMi can provide the sufficient basis to the design and construction of the engineering.

 

Key words: RMi method; parameter optimization; rock classification; estimation of mechanical parameters of rock mass; Hoek-Brown failure criterion

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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