基于数字摄影测量的结构面信息表征及应用研究

结构面的存在直接影响岩体的强度、变形特征及破坏机制。为探究夏甸金矿矿区结构面的存在对岩体力学参数和岩体质量情况的影响，利用数字摄影测量技术快速获取研究区域结构面几何信息，并通过三维建模、激光扫描技术以及VR-Platform虚拟现实平台实现了结构面二维几何信息的真三维表征。基于此，利用广义Hoek-Brown强度准则分析计算了各研究区域的岩体力学参数，并根据岩体基本质量指标BQ值进行了岩体质量分级评价。结果表明，夏甸金矿岩体力学参数指标和岩体质量指标均较好；矿体下盘距离矿体方向越远，岩体完整性系数和岩体力学参数越低；利用广义Hoek-Brown强度准则计算所得岩体力学参数除内摩擦角外数值均与前期试验所得数据基本一致，计算所得岩体内摩擦角度偏大的原因，可能是其未考虑结构面自身的颗粒直径和形态等对岩体内摩擦角的影响。

Structural plane information characterization and application based on digital photogrammetry

The existence of the structural plane directly affects the strength,deformation characteristics and failure mechanism of a rock mass.In order to explore the influence of the structural plane on the mechanical parameters of rock mass and the quality of a rock mass of the Xia Dian gold mine,the digital photogrammetry technology was used to quickly acquire the geometric information of the structural plane of the study area,and the true three-dimensional characterization of the two-dimensional geometric information of the structural plane was realized by three-dimensional modeling,laser scanning technology and VR-Platform virtual reality platform.Based on this information,the generalized Hoek-Brown strength criterion was used to analyze mechanical parameters of each studied area of the rock mass,and the rock mass quality classification was evaluated according to the BQ value of the basic quality index of the rock mass.The values of the mechanical parameters of the rock mass calculated by the generalized Hoek-Brown strength criterion are basically consistent with the data obtained in the previous test except the internal friction angle.The reason why the calculated friction angle of the rock is too large may be that it does not consider the influence of the particle diameter and shape of the structural plane itself on the friction angle of the rock.