积石山Ms6.2级和泸定Ms6.8级地震地质灾害发育规律对比  

Comparative research of the characteristics of geological hazards induced by the Jishishan(Ms 6.2)and Luding(Ms 6.8)earthquakes

作　　者：铁永波 张宪政 曹佳文 秦雅东 王立朝 董英 郭富赟 郭兆成 白永健 冉涛 侯圣山 王涛[9] 高波 卢佳燕 李光辉[11] 宁志杰 向炳霖 孙才 TIE Yongbo;ZHANG Xianzheng;CAO Jiawen;QIN Yadong;WANG Lichao;DONG Ying;GUO Fuyun;GUO Zhaocheng;BAI Yongjian;RAN Tao;HOU Shengshan;WANG Tao;GAO Bo;LU Jiayan;LI Guanghui;NING Zhijie;XIANG Binglin;SUN Cai(Chengdu Center of China Geological Survey(Geosciences Innovation Center of Southwest China),Chengdu 610081,China;Technology Innovation Center for Risk Prevention and Mitigation of Geohazard,Ministry of Natural Resources,Chengdu 611734,China;Observation and Research Station of Chengdu Geological Hazards,Ministry of Natural Resources,Chengdu 610000,China;China Geological Survey,Beijing 100037,China;China Institute of Geo-Environment Monitoring(Guide Center of Prevention Technology for Geo-Hazard,MNR),Beijing 100081,China;Xi’an Center of China Geological Survey(Northwest China Center on Geosciences Innovation),Xi’an 710119,China;Institute of Geo-Environment Monitoring of GANSU Province,Lanzhou 730000,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;Chinese Academy of Geological Sciences,Beijing 100037,China;Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国地质调查局成都地质调查中心(西南地质科技创新中心),成都610081 [2]自然资源部地质灾害风险防控工程技术创新中心,成都611734 [3]自然资源部成都地质灾害野外科学观测研究站,成都610000 [4]中国地质调查局,北京100037 [5]中国地质环境监测院(自然资源部地质灾害技术指导中心),北京100081 [6]中国地质调查局西安地质调查中心(西北地质科技创新中心),西安710119 [7]甘肃省地质环境监测院,兰州730000 [8]中国自然资源航空物探遥感中心,北京100083 [9]中国地质科学院地质力学研究所,北京100081 [10]中国地质科学院,北京100037 [11]成都理工大学,成都610059

出　　处：《成都理工大学学报（自然科学版）》2024年第1期9-21,59,共14页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金项目(U20A20110-01);中国地质调查局地质调查项目(DD20221746,DD20230086);中央引导地方科技发展资金项目(3ZYQA03262)。

摘　　要：2023年积石山Ms6.2级地震是继2022年泸定Ms6.8级地震后在青藏高原东缘—东北缘地区发生的又一次强震事件。2次地震均诱发大量地震地质灾害,但由于发震断层类型、地质和地貌等条件的差异,2次地震地质灾害发育分布规律呈现显著的差异性。为揭示不同震区地震地质灾害发育规律,本研究采用地面调查、遥感解译和空间叠加统计等方法,对比分析了积石山和泸定地震地质灾害发育分布特征和控灾因子。结果表明:断层类型控制了同震地质灾害的发育优势坡向和垂向空间展布,即“背向坡效应”和“上下盘效应”;地貌条件是影响同震地质空间分布的主要因子,即川西高山峡谷地貌中“线状”分布和陇西黄土地貌中“面状”分布;特殊土体类型、气候、植被覆盖等差异性是同震地质灾害调查与应急处置中需要重点关注的因子。本次研究可为不同断层类型和不同地貌区同震地质灾害重点防范区范围划定、趋势预测和灾后重建提供科学参考。The 2023 Jishishan earthquake(Ms 6.2)was another strong earthquake that occurred in the eastern/northeastern margin of the Qinghai-Tibet Plateau after the 2022 Luding earthquake(Ms 6.8).Both earthquakes triggered large numbers of co-seismic landslides.To reveal the differences of the distributions and control factors of co-seismic landslides caused by the Jishishan and Luding earthquakes,distribution maps of co-seismic landslides were compared and analyzed using ground survey data,remote sensing interpretation data,and spatial superposition statistics.The results showed that the fault type controlled the dominant slope direction of co-seismic landslides as well as the spatial distribution along the vertical fault,where the“back slope”effect and“up-fault and down-fault”effect were clearly identified.Geomorphic conditions were the main factors affecting the spatial distribution characteristics of co-seismic landslides.The distribution of co-seismic landslides was“linear”in the mountain and canyon landforms in western Sichuan,and“planar”in the loess landforms in Longxi.Attention should be given to the differences of special soil type,climate,and vegetation cover in investigations and emergency treatment of co-seismic landslides.This research provided a scientific reference for the delineation of the key prevention areas of co-seismic landslides in different fault types and different geomorphic areas,including trend predictions and the post-disaster reconstruction.

关 键 词：积石山地震 泸定地震 地震地质灾害对比研究 同震滑坡分布特征 控灾因子 

分 类 号：P315.9[天文地球—地震学]