| 基于岩体结构特征的高速远程滑坡致灾范围评价 |
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| 引用本文： | 葛云峰,唐辉明,李伟,王亮清,吴益平,易贤龙,熊承仁.基于岩体结构特征的高速远程滑坡致灾范围评价[J].地球科学,2016,41(9):1583-1592. |
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| 作者姓名： | 葛云峰 唐辉明 李伟 王亮清 吴益平 易贤龙 熊承仁 |
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| 作者单位： | 1.中国地质大学工程学院，湖北武汉 430074 |
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| 基金项目： | 中国博士后基金项目2015M570671国家自然科学基金重点项目41230637岩土钻掘与防护教育部工程研究中心开放研究基金项目201502中央高校基本科研业务费专项资金资助项目CUGL150822 |
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| 摘 要： | 高速远程滑坡的演化机制与运动过程受控于岩体结构.以重庆市武隆县鸡尾山滑坡为例，采用地面激光扫描技术，获取岩体结构面几何信息，基于离散元数值模拟方法，考虑岩体结构特征，分析高速远程滑坡演化过程及其致灾范围.研究结果表明:(1) 岩体结构特征由岩体内部发育的结构面所决定，针对点云数据开展空间几何计算与聚类分析，可以快速精细地获取岩体结构面产状信息，从而进行岩体结构面识别与组别划分；(2) 将岩体结构特征评价结果导入离散元模型中，能够实现高速远程滑坡致灾范围的快速评价目的，并且取得了与实际滑动距离较为吻合的结果.
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| 关 键 词： | 高速远程滑坡 岩体结构特征 数值模拟 聚类分析 地面激光扫描 离散元 致灾范围 |
| 收稿时间： | 2016-02-01 |
Evaluation for Deposit Areas of Rock Avalanche Based on Features of Rock Mass Structure |
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| Abstract: | Evolution mechanism and movement process of rock avalanche are dominated by rock mass structure. The geometric information on rock discontinuities in Jiweishan landslide area was collected using terrestrial laser scanner (TLS). In addition, discrete element method (DEM), which takes into account the rock mass structure, was employed to investigate the evolution process and deposit areas of Jiweishan landslide. Results show that: (1) the features of rock mass structure were determined by rock discontinuities whose orientation was obtained by geometric calculations and cluster analysis on point cloud in a short time, and the identification and clustering of rock discontinuities were completed based on the distribution of orientation; (2) DEM and features of rock mass structure were combined to assess the deposit areas of rock avalanche, and simulation results have a good agreement with the actual situations. |
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