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岩体隧道开挖过程中所获得的节理相关信息的迅速程度、准确程度将直接影响到工程的安全性。借助于三维岩体不接触测量技术,快速获取一系列真实描述岩体宏观结构的数字图像,提取节理几何形态空间分布信息,在此基础上利用自行开发研制的岩体模型空间分析系统GeoSMA-3D,快速识别关键块体;并运用三维离散元程序3DEC及其内嵌FISH语言建立模型,将两者的优势结合起来。研究工作面推进过程中岩体的运动形式和垮落形态,记录并且分析开挖推进过程岩体变形塌落全过程,最后尝试将数值计算结果来反馈分析指导施工。
The rapidity and accuracy of joint-related information obtained during rock tunnel excavation will directly affect the safety of the project. With the help of 3D non-contact measurement technique, a series of digital images that can truly describe the macrostructure of rock mass are quickly obtained and the spatial distribution information of joint geometry is extracted. Based on this, the GeoSMA-3D , Quickly identify the key block; and use the 3D discrete element program 3DEC and its embedded FISH language to establish a model, the advantages of both combined. The movement forms and caving patterns of rock mass during the working face advancement are studied. The whole process of deformation and caving of rock mass during excavation is recorded and analyzed. At last, the numerical calculation results are fed back to guide the construction.