基于简化Newmark模型的长白山天池火山诱发崩塌滑坡危险性评价

发布时间：2018-03-02 18:23

本文选题：天池火山　切入点：崩塌　出处：《吉林大学学报(地球科学版)》2017年03期 　论文类型：期刊论文

【摘要】：火山喷发过程所伴生的地震活动会诱发大量的崩塌滑坡次生灾害,其所造成的人员财产损失甚至超过火山活动本身。2002年以来长白山天池火山区地震活动的异常,表明火山深部的岩浆正在发生变化,天池火山存在喷发的危险。地震崩塌滑坡的危险性区划是降低生命财产损失的有效手段。将火山伴生地震作为崩塌滑坡灾害的诱发因素并据此设置地震参数,利用简化的Newmark累积位移模型,考虑地形因素对地震的放大效应,对长白山地区天池火山喷发下次生崩塌、滑坡灾害的危险性进行评价。通过探讨不同地震震级下的危险性分区结果,认为不同地震参数的设置对危险性分区结果没有影响。将研究区划分为极高、高、中等、低、极低等5个危险等级,其中,极高危险区主要分布在3个区域:以天池口为中心,40km为半径的范围内;沿江乡—两江镇—松江镇条带区域;长白县境内鸭绿江沿岸区域。
[Abstract]:The earthquake activity associated with the volcanic eruption process will induce a large number of secondary disasters of landslides and collapses, which will cause more damage to people and property than the volcanic activity itself. The earthquake activity in Tianchi Fire Mountain area of Changbai Mountain has been abnormal since 2002. Indicating that the magma in the deep part of the volcano is changing, The danger of eruption exists in Tianchi volcano. The dangerous zoning of earthquake collapse and landslide is an effective means to reduce the loss of life and property. By using the simplified Newmark cumulative displacement model and considering the magnification effect of topographic factors on the earthquake, the next occurrence and collapse of Tianchi volcanic eruption in Changbai Mountain area is studied. The risk of landslide hazard is evaluated. By discussing the results of hazard zoning under different magnitude earthquakes, it is considered that the setting of different seismic parameters has no effect on the results of hazard zoning. The study area is divided into extremely high, high, medium and low. Among them, the extremely high risk area is mainly distributed in three regions: the center of Tianchi mouth is within 40 km radius, the strip area of Yanjiang Township-Liangjiang Town-Songjiang Town and the coastal area of Yalu River in Changbai County.
【作者单位】：吉林大学建设工程学院;
【基金】：国土资源部公益性行业科研专项(201211095-6) 国家自然科学基金青年基金项目(41202197) 吉林省科技厅科技发展计划项目(20170101001JC)~~
【分类号】：P642.2

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