岩体损伤度的点荷载强度计算及分析  

Analyses and calculation of point load strength on rock mass damage index

作　　者：文磊[1] 罗周全[1] 杨仕教[2] 汪伟[1] 郑开欢[1] 

机构地区：[1]中南大学资源与安全工程学院,长沙410083 [2]南华大学核资源工程学院,衡阳421001

出　　处：《工程科学学报》2017年第2期175-181,共7页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51274250)

摘　　要：根据现场点荷载强度试验的统计结果和损伤力学原理,提出了一种新的岩体损伤度计算方法,即点荷载强度计算方法.为了验证该方法的可靠性和准确性以及这种方法计算的岩体损伤度与岩体完整性指数之间的关系,进行了一系列理论推导和现场岩体声波测试与实验室岩石声波测试.结果表明:该方法计算的损伤度与岩体完整性系数表现出很好的一致性,并且该方法计算的损伤度与巷道松动圈内岩体损伤度的变化趋势一致.实测值与理论值之间的误差都在7%以内,说明通过该方法计算岩体损伤度有较高的准确性和可靠性.A new method for calculating the damage index was first proposed--point load strength method （PLSM） , based on the scene point loading strength test results and the damage theory. In order to verify the reliability and accuracy of the method and demon- strate the relationship between the damage index and integrity index which has been computed using this method, a series of theoretical inferences, in-situ rock mass acoustic tests and the lab rock acoustic tests have been carried out. The results show that the damage in- dex and rock mass integrity coefficient have good consistency. The damage index calculated by using this method is correspondent with the change trend of rock mass damage extent within the scope of the loose circle. The error value of measured and theoretical values is less than 7%. It shows that calculating the damage index through the method has high accuracy and reliability.

关 键 词：强度损伤度 点荷载强度 完整性系数 声波 节理 

分 类 号：TU45[建筑科学—岩土工程]