改进Miller法及其在裂隙岩体统计均质区划分的应用  

Application of improved Miller method in the division of statistical homogenous zones of fractured rock mass

作　　者：张悦 李晓昭[1,2] 许文涛 章杨松 余兴建[1] 刘日成 ZHANG Yue;LI Xiaozhao;XU Wentao;ZHANG Yangsong;YU Xingjian;LIU Richeng(School of Earth Sciences and Engineering,Nanjing University,Nanjing,Jiangsu 210023,China;Key Laboratory of Deep Geomechanics and Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Department of Civil Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China)

机构地区：[1]南京大学地球科学与工程学院,江苏南京210023 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [3]南京理工大学土木工程系,江苏南京210094

出　　处：《岩石力学与工程学报》2021年第3期533-544,共12页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点研发项目(KEGONGERSI2012–491);国家重点基础研究发展计划(973)项目(2013CB036001)。

摘　　要：裂隙岩体统计均质区划分是分析评价岩体质量和稳定性及建模的基础。针对基于传统Miller法的岩体均质区划分方法受样本量、自由度以及Lancaster准则限制等问题,从块网划分方案、总体显著性水平取值以及空白区合并原则3个层面对其进行优化,并以甘肃北山某核废料处置库预选场址部分典型露头为研究对象,结合Mathab法与Pearson相关系数法,综合分析评价该区域内裂隙岩体统计均质区。结果表明:针对北山地区裂隙陡倾与缓倾共存的情况,优化后的Miller法较原方法更具适应性;Mathab法的划分结果波动较大,可信度较低;而Pearson相关系数法在统计意义上的相关性判别力不强。改进后的Miller法更适用于复杂条件下的裂隙岩体均质区划分。Fractured rock mass statistical homogeneous area division is the basis for evaluating quality and stability of rock mass and modeling.The rock mass homogenous area division methods based on Miller method are limited by sample size,degree of freedom and Lancaster rules.In this paper,Miller method was optimized from three levels including block network division scheme,overall significance level value and principle of merging blank areas.Some typical outcrops in the preselected site of a nuclear waste repository in Beishan,Gansu province,were selected as the research objects,and the rock mass statistical homogeneous area was comprehensively analyzed and evaluated combined with the Mathab method and the Pearson correlation coefficient method.The results show that the optimized Miller method is more adaptable than the original method for the coexistence of steep and gentle dips in the Beishan area,that the division results of the Mathab method fluctuate greatly and have lower credibility,and that Pearson’s correlation coefficient method is not strong in identifying correlation in statistical significance.The improved Miller method is more applicable to the division of fractured rock mass homogeneous area under complex conditions.

关 键 词：岩石力学 裂隙岩体 均质区划分法 统计检验 北山 

分 类 号：TU45[建筑科学—岩土工程]