积石山M_(S)6.2级地震同震泥流动力学过程模拟研究  

Dynamic process simulation of coseismic mudflow triggered by the Jishishan M_(S)6.2 earthquake

作　　者：叶豪 王乃昂[1] 赵力强[1] 李小强[1,2] 程弘毅[1] YE Hao;WANG Nai’ang;ZHAO Liqiang;LI Xiaoqiang;CHENG Hongyi(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Geological Survey of Gansu Province,Lanzhou 730000,China)

机构地区：[1]兰州大学资源环境学院,甘肃兰州730000 [2]甘肃省地质调查院,甘肃兰州730000

出　　处：《冰川冻土》2025年第2期430-440,共11页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(42271131)资助。

摘　　要：2023年12月18日23时59分,甘肃省积石山县发生M_(S)6.2级地震,同时在青海省民和县中川乡祁家沟暴发了泥流地质灾害,造成了严重的人员伤亡和财产损失。经过野外调查、高精度的遥感图像解读和室内实验等多种方法,对中川乡地区泥流灾害链的形成原因、动力学机理和运动学特征进行分析和数值模拟。根据现场调查和室内实验确定的参数,利用FLO-2D模型模拟了祁家沟泥流发生、运动和堆积过程。研究表明,在地势起伏较大的张家沟与祁家沟交汇处泥流最大速度接近10 m·s^(-1),最大泥深接近16 m,模拟结果与实测数据一致。本研究所采用的数值模拟方法,可以有效描述泥流运动和堆积阶段的特征,可为类似泥流灾害的预测和预防提供重要借鉴。At 23:59 on December 18,2023,a magnitude M_(S)6.2 earthquake struck Jishishan County,Gansu Province.Simultaneously,a mudflow geological disaster occurred in Qijiagou,Zhongchuan Township,Minhe County,Qinghai Province,resulting in severe casualties and property damage.Through field investigations,high-precision remote sensing image interpretation,and laboratory experiments,the causes,dynamic mecha⁃nisms,and kinematic characteristics of the mudflow disaster chain in the Zhongchuan Township area were ana⁃lyzed and numerically simulated.Using parameters determined from field surveys and laboratory experiments,the FLO-2D model was employed to simulate the initiation,movement,and deposition processes of the mud⁃flow in Qijiagou.The study revealed that the maximum velocity of the mudflow near the confluence of Zhangjia⁃gou and Qijiagou,where the terrain is highly undulating,reached nearly 10 m·s^(-1),with a maximum mud depth of approximately 16 m.The simulation results were consistent with the measured data.The numerical simula⁃tion method adopted in this study can effectively describe the characteristics of the mudflow during its movement and deposition stages,providing valuable insights for the prediction and prevention of similar mudflow disasters.

关 键 词：积石山M_(S)6.2级地震 泥流 数值模拟 FLO-2D 运动过程 

分 类 号：P642.23[天文地球—工程地质学]