2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析

张佳佳 陈龙 李元灵 刘民生 石胜伟 易靖松 张文 张世林 孙金辉 杨栋 鲜杰良 蔡佳君

张佳佳,陈龙,李元灵,刘民生,石胜伟,易靖松,张文,张世林,孙金辉,杨栋,鲜杰良,蔡佳君. 2023. 2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析. 地震学报,45(2):167−178 doi: 10.11939/jass.20220215
引用本文: 张佳佳,陈龙,李元灵,刘民生,石胜伟,易靖松,张文,张世林,孙金辉,杨栋,鲜杰良,蔡佳君. 2023. 2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析. 地震学报,45(2):167−178 doi: 10.11939/jass.20220215
Zhang J J,Chen L,Li Y L,Liu M S,Shi S W,Yi J S,Zhang W,Zhang S L,Sun J H,Yang D,Xian J L,Cai J J. 2023. Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake on September 5,2022. Acta Seismologica Sinica,45(2):167−178 doi: 10.11939/jass.20220215
Citation: Zhang J J,Chen L,Li Y L,Liu M S,Shi S W,Yi J S,Zhang W,Zhang S L,Sun J H,Yang D,Xian J L,Cai J J. 2023. Development characteristics and controlling factors of co-seismic geo-hazards triggered by the Luding MS6.8 earthquake on September 5,2022. Acta Seismologica Sinica45(2):167−178 doi: 10.11939/jass.20220215

2022年9月5日泸定MS6.8地震的同震地质灾害发育特征及主控因素分析

doi: 10.11939/jass.20220215
基金项目: 中国地质调查局地质调查项目(DD20221741,DD20221630)、第二次青藏高原综合科学考察研究项目(2019QZKK0902)、自然资源部深地动力学重点实验室自主(开放)研究课题(J1901)和国家自然科学基金(42230312,42020104007)联合资助
详细信息
    作者简介:

    张佳佳,博士研究生,工程师,主要从事活动断裂的地质灾害效应研究,e-mail:jimjia2008@163.com

    通讯作者:

    刘民生,教授级高级工程师,主要从事地质灾害评价与防治相关研究,e-mail:489629205@qq.com

  • 中图分类号: P315.9

Development characteristics and controlling factors of coseismic geohazards triggered by the Luding MS6.8 earthquake occurred on September 5,2022

  • 摘要: 基于2022年9月5日泸定MS6.8地震的野外调查,结合遥感解译结果,总结了泸定地震同震地质灾害的发育特征和主控因素,研判了同震地质灾害的演化趋势,并针对同震地质灾害防灾减灾的不同阶段给出了相应的建议。结果显示:泸定地震同震地质灾害整体以小−中型崩塌、滑坡为主,集中分布在磨西镇和海螺沟、得妥镇湾东村、得妥镇大渡河沿岸三个区域;主震和余震、鲜水河活动断裂、地形地貌、特殊岩土体是泸定地震同震崩滑空间分布的主控因素;泸定地震震后地质灾害在未来十年内会极为活跃,需要密切关注磨西河和支沟、大渡河河谷两侧的高陡岸坡、大渡河高阶地、磨西台地边缘区域以及磨西镇、得妥镇同震崩滑密集发育的泥石流沟谷。根据同震地质灾害应急防范的管理逻辑,建议地方政府按照过渡性安置详查阶段、恢复重建阶段、长远规划阶段三个阶段来针对性地开展地质灾害的防灾减灾工作。

     

  • 图  1  2022年9月5日四川泸定地震区域构造图

    Figure  1.  Tectonic settings of Luding earthquake occurred on September 5,2022

    图  2  2022年9月5日四川泸定地震同震地质灾害分布图

    Figure  2.  Distribution of coseismic landslides triggered by Luding earthquake

    图  3  (a) 磨西台地典型冰水堆积物崩塌;(b) 海螺沟景区内的高位崩塌

    Figure  3.  (a) Collapse occurred in glaciofluvial sediment around Moxi platform;(b) High-locality collapse occurred in Hailuogou valley

    图  4  (a) 湾东村区域大沟内的同震崩滑;(b) 湾东村村委会周边同震崩滑的面状特征

    Figure  4.  (a) Collapse occurred in Dagou valley of Wandong village;(b) Polygon shape feature of landslides around Wandong Village Committee

    图  5  (a) 得妥镇大渡河大桥上游的同震崩滑;(b) 磨岗岭滑坡后缘变形特征

    Figure  5.  (a) Landslides occurred in the upstream of Daduhe river bridge;(b) Deformation feature at backedge of Mogangling landslide

    图  6  磨西镇—田湾乡鲜水河断裂沿线同震崩滑与断裂、地震的位置关系

    Figure  6.  The spatial relationship between coseismic landslides and fault,earthquakes along Moxi-Tianwan segment of Xianshuihe fault

    图  7  同震崩滑距离发震断裂的空间分布规律

    Figure  7.  The spatial distribution law between co-seismic landslides and the seismogenic fault

    图  8  震区特殊岩土体中的同震崩塌和滑坡

    (a) 燕子沟景区公路沿线的冰水堆积崩塌;(b) 海螺沟景区公路沿线坡积碎石土中形成的滑坡;(c) 大渡河沿岸S211公路云母片岩中的顺向坡滑坡;(d) 燕子沟景区公路北侧斜坡花岗岩中的崩塌

    Figure  8.  Co-seismic landslides occurred in special rock and sediment mass

    (a) Collapse occurred in glaciofluvial sediment along road in Yanzigou valley;(b) Landslide occurred in gravel soil along road in Hailuogou valley;(c) Consequent landslide occurred in mica slate along S211 road along Daduhe river; (d) Rockfall occurred in granite along road in Yanzigou valley

    表  1  历史地震震后地质灾害活跃期统计

    Table  1.   Statistics of active period of geohazard after historical earthquakes

    地震MS震后地质灾害活跃期/a
    1923年日本关东地震 7.9 15
    1999年台湾集集地震 7.6 5
    2005年巴基斯坦克什米尔地震 7.6 5
    2008年汶川地震 8.0 20
    2013年芦山地震 7.0 10
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  • 收稿日期:  2022-11-25
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