高陡岩质斜坡复杂结构面分布规律及统计均质区划分  

Complex Structural Plane Distribution of High⁃Steep Rock Slope and Division of Statistical Homogeneous Zones

作　　者：潘晓娟 张文[1] 孙琦 蓝升 董文川 Pan Xiaojuan;Zhang Wen;Sun Qi;Lan Sheng;Dong Wenchuan(College of Construction Engineering,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学建设工程学院,吉林长春130026

出　　处：《地球科学》2024年第9期3334-3346,共13页Earth Science

基　　金：国家重点研发计划青年科学家项目(No.2022YFC3080200);国家自然科学基金优秀青年科学基金项目(No.42022053).

摘　　要：为根据结构面的空间分布特征合理划分岩体结构均质区,以西藏昌都市洛隆县察达村冻措曲左岸高陡岩质斜坡为研究对象,采用无人机多角度贴近摄影技术获取研究区高精度影像数据,并于室内完成斜坡高清三维实景模型重建与结构面信息解译;在大量结构面调查的基础上,分析研究了斜坡结构面的发育规律与成因机制.基于结构面空间分布特征,引入组内相关系数法,考虑结构面产状与密度,联合38等分施密特投影网进行岩体统计均质区划分,并与Pearson相关系数法进行对比.结果表明斜坡结构受构造应力场、断层以及风化作用控制,表现为结构面产状与密度在空间内差异性分布,斜坡最终被划分为14个不同的均质区.针对结构面产状与密度存在空间分异性的特点,Pearson相关系数法对样本间的一致性判别力较弱,而组内相关系数法评价效果较好,更适用于复杂岩体结构的统计均质区划分,具有一定的应用价值.In order to reasonably demarcate the structural homogeneity according to the spatial distribution characteristics of the structural plane,this paper takes the high-steep rock slope of the left bank of Dongcuoqu,Chada Village,Luolong County,Changdu City,Xizang as the research object,adopts the multi-angle nap-of-the-object photography technology to obtain the high-precision image data of the study area and realize the reconstruction of slope 3D real scene model and the interpretation of structural plane information.Based on plenty of structural plane investigations,the development and genetic mechanism of structural plane are analyzed.On the basis of the spatial distribution characteristics of discontinuities with considering the orientation and density,the intraclass correlation coefficient method was introduced,combined with Schmidt plot divided into 38 equal areas,to divide structural homogeneity of rock mass and compared with Pearson's correlation coefficient method.The results show that the slope structure is controlled by tectonic stress field,fault and weathering,with the orientation and density of structural plane distributed differently in space.In addition,the slope is finally divided into 14 different homogeneous zones.In view of the characteristics of spatial differentiation of the orientation and density of structural plane,Pearson’s correlation coefficient method has a weak ability to discriminate the homogeneity between samples,while the intraclass correlation coefficient method has a better evaluation effect,which is more suitable for the division of statistical homogeneity of complex rock structure with certain application value.

关 键 词：结构面 分布规律 统计均质区 组内相关系数 多角度贴近摄影 斜坡稳定性 工程地质. 

分 类 号：P642[天文地球—工程地质学]