地下洞室围岩EDZ判别方法及标准  

Assessment methods and criterion of EDZ for underground caverns

作　　者：徐光黎[1] 李志鹏[1] 宋胜武[2] 陈卫东[2] 张世殊[2] 董家兴[3] 

机构地区：[1]中国地质大学岩土钻掘与防护教育部工程研究中心,湖北武汉430074 [2]中国电建成都勘测设计研究院有限公司,四川成都610072 [3]昆明理工大学电力工程学院,云南昆明650500

出　　处：《中南大学学报（自然科学版）》2017年第2期418-426,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(41472263);雅砻江水电开发联合研究基金重点资助项目(50539100);中国水电工程顾问集团公司科研项目(P099)~~

摘　　要：在引入EDZ概念的基础上,推荐采用声波、多点位移计、钻孔电视和声发射4种监测、检测技术方法来确定强、弱EDZ的深度。基于声波测试,通过分析波速-深度曲线特征和计算损伤因子D可以判别围岩EDZ;利用多点位移计和钻孔电视的监测检测成果,通过计算位移(张开量)-深度曲线和各区段的应变量,可以判别围岩EDZ;通过分析AE事件数及其频率的变化规律亦可以确定围岩EDZ深度。与单一指标的定性划分相比,提出的EDZ综合判别方法和判别标准具有客观、综合的特点,可以定性、定量地综合判别EDZ深度。EDZ concept is defined, and it is subdivided into inner zone and outer zone. Four monitoring methods, i.e.,elastic wave velocity, multipoint displacement meter, BTV and AE, are suggested for engineering practice after insight reviewing of the all monitoring methods. The main research results are as follows. Based on the acoustic wave test, the EDZ of the surrounding rock can be determined by analyzing the velocity-depth curve and calculating the damage factor D. Based on the results of multi-point displacement meter and BTV, the EDZ of surrounding rock can be determined by calculating the displacement（opening）-depth curve and the strain of each section. Through analyzing the number of AE events and their frequency, the EDZ depth can be determined. Compared with the qualitative classification of single index,the first proposed EDZ comprehensive discriminant method and discriminant criterion have the characteristics of objective and comprehensive, which can discriminate the depth of EDZ qualitatively and quantitatively.

关 键 词：开挖损伤区 声波 多点位移计 钻孔电视 声发射 

分 类 号：TU45[建筑科学—岩土工程]