西藏定日县M_(s)6.8级地震区地质灾害发育规律与减灾对策研究  

Study on the development laws and mitigation of geological hazards in Dingri M_(s)6.8 earthquake region,Xizang Autonomous Region

作　　者：铁永波 高云建 张宪政 史安文 黄文洁 秦雅东 李宗亮 董磊 宁志杰 TIE Yongbo;GAO Yunjian;ZHANG Xianzheng;SHI Anwen;HUANG Wenjie;QIN Yadong;LI Zongliang;DONG Lei;NING Zhijie(Chengdu Center,China Geological Survey(Geosciences Innovation Center of Southwest China),Chengdu 610218,China;Technology Innovation Center for Risk Prevention and Mitigation of Geohazards,Ministry of Natural Resources,Chengdu 610000,China;Observation and Research Station of Chengdu Geological Hazards,Ministry of Natural Resources,Chengdu 610000,China;Exploration Technology Research Institute of China Geological Survey,Chengdu 611734,China;The Second Geological Brigade of Xizang Autonomous Region Geological and Mineral Exploration and Development Bureau,Lhasa 850000,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),四川成都610218 [2]自然资源部地质灾害风险防控工程技术创新中心,四川成都610000 [3]自然资源部成都地质灾害野外科学观测研究站,四川成都610000 [4]中国地质调查局探矿工艺研究所,四川成都611734 [5]西藏自治区地质矿产勘查开发局第二地质大队,西藏拉萨850000

出　　处：《沉积与特提斯地质》2025年第1期212-224,共13页Sedimentary Geology and Tethyan Geology

基　　金：西藏重点研发计划项目(XZ202401ZY0029);西藏自治区自然科学基金重点项目(XZ202401ZR0073);中国地质调查局公益性地质调查项目(DD20230086)。

摘　　要：2025年1月7日,西藏自治区定日县发生M_(s) 6.8级地震,诱发同震地质灾害并导致部分已有地质灾害发生变形。为深入研判地质灾害发展趋势及潜在风险,基于现场应急调查获取的一手资料和区域地质资料综合研究,分析了此次地震地质灾害发育特征与分布规律并提出了防灾减灾对策。结果表明:(1)震区震前发育有868处地质灾害点,灾害规模以小型和中型为主,此次地震新增同震地质灾害91处,主要以滑坡、泥石流、崩塌为主;(2)地震还导致107处震前地质灾害点发生进一步变形;(3)此次地震虽未引发大量的同震地质灾害,但仍会对高位山体、冰川、冰湖等的稳定性造成一定影响,需进一步开展详细调查评价,并深化砂土液化成因机制及其对城镇和工程建设带来的潜在风险。研究成果可为定日县震区地质灾害排查及灾后重建规划提供科学参考。On January 7^(th),2025,an M_(s)6.8 earthquake occurred in Dingri County,Xizang Autonomous Region,triggering coseismic geological hazards and causing deformation of some existing geological hazards.In order to deeply analyze their development trend and potential risks,based on primary data obtained from on-site emergency investigation and comprehensive studies of regional geological data,this paper studies the development and distribution characteristics as well as disaster prevention and reduction countermeasures of the geological disasters in the earthquake area.The results show that 868 geological disaster sites,including landslides,debris flows,collapses and ground cracks,were identified before the earthquake,and this number increased by 91 after the earthquake.The scales of the disasters were mainly small and medium;107 geological disaster sites were significantly or slightly changed due to the earthquake.It is believed that,although the earthquake did not cause a large number of coseismic geological hazards,it will still have a certain impact on the stability of high mountains,glaciers,glacial lakes,etc.It is necessary to further carry out detailed investigation and evaluation in the earthquake area,and to pay attention to the research and evaluation of the genetic mechanism of sand liquefaction in the valley area,as well as to investigate the potential risks that may be posed to regional towns and engineering constructions.The research results of this paper can provide a scientific reference for the determination of key areas and objects of geological disaster investigation and post-disaster reconstruction planning in the Dingri County earthquake area.

关 键 词：定日县地震 地质灾害发育规律 控灾条件 防灾建议 

分 类 号：P694[天文地球—地质学]