基于CT技术的层状复合岩体损伤演化规律分析  

Analysis of damage evolution law of layered composite rock mass based on CT technology

作　　者：孙富强 SUN Fuqiang(College of Geological Engineering and Geomatics,Chang′an University,Xi′an 710054,China;Gansu Province Key Laboratory of Groundwater Engineering and Geothermal Resources,Geological Environmental Monitoring Institute of Gansu Province,Lanzhou 730050,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]甘肃省地质环境监测院甘肃省地下水工程及地热资源重点实验室,兰州730050

出　　处：《无损检测》2021年第5期38-42,48,共6页Nondestructive Testing

摘　　要：提出了基于CT(电子计算机断层扫描)技术的层状复合岩体损伤演化规律分析方法。该方法依据岩体颗粒之间的碰撞,计算颗粒间相互作用力的法向分量和切向分量,以此建立岩体损伤分析模型;设置固定节点,利用CT技术对岩石样品进行扫描,由CT图像获取岩体损伤特征;根据夹层应力模型引入岩体蠕变参数,通过线性回归方程计算原理,分析得出岩体损伤演化规律。试验测试结果表明,对比传统分析方法,该方法获得的损伤数据精准,分析得出的岩体损伤演化规律与实际相符合,能满足岩体损伤规律分析的要求。This paper proposes a method for analyzing the damage evolution of layered composite rock masses based on CT(computed tomography) scanning technology. This method calculates the normal component and tangential component of the interaction force between the particles based on the collision between the particles of the rock mass, thereby establishing a rock damage analysis model. It also set fixed nodes and utilized CT scanning technology to scan the rock sample. The CT image is used to obtain the damage characteristics of the rock mass;the creep parameter of the rock mass is introduced according to the interlayer stress model, and the evolution rule of the rock mass damage is analyzed through the calculation principle of the linear regression equation. The experimental test results show that, compared with the traditional analysis method, the damage data obtained by this method is accurate, the analysis of the damage evolution law of the rock mass is consistent with the actual situation and this method meets the requirements of rock mass damage law analysis.

关 键 词：CT技术 层状复合岩体 损伤演化规律 夹层应力模型 

分 类 号：TU45[建筑科学—岩土工程] TG115.28[建筑科学—土工工程]