郯庐断裂带安徽段区域地壳稳定性评价  

Evaluation of crustal stability of Anhui section of Tan-Lu fault zone

作　　者：郑超绘 钱家忠[1] 侯晓亮[1] ZHENG Chaohui;QIAN Jiazhong;HOU Xiaoliang(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2020年第10期1398-1403,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(41831289,41772250);安徽省公益性地质工作资助项目(2015-g-26)。

摘　　要：郯庐断裂带是中国东部的一条巨型断裂带,也是中国东部最大的地震活动带,其对区域地壳稳定性的影响目前已成为制约城市发展的重要因素之一。文章在收集资料的基础上,通过野外地质调查,分析了控制和影响郯庐断裂带安徽段的区域地壳稳定性主要因素;选取断裂稳定性、地震动峰值加速度、地震活动密度、岩土体稳定性、崩滑流地质灾害易发性以及采空塌陷敏感性6个因素作为评价因子,并对评价因子进行分类赋值;基于ArcGIS平台,采用多因素加权叠加方法,建立区域地壳稳定性评价模型;根据自然断点法将研究区分为稳定区、较稳定区、较不稳定区及不稳定区4个等级。由评价结果可知,郯庐断裂安徽段区域地壳稳定性以稳定和较稳定为主,占87.3%,较不稳定占7.9%,而不稳定区域仅占4.8%。Tan-Lu fault zone is a giant fault zone and the largest active seismic zone in East China.The regional crustal stability is one of the important factors that restrict the urban development.On the basis of field investigation and extensive collection of information,this paper analyzed the main factors that control and influence the regional crustal stability of the Anhui section of the Tan-Lu fault zone.Six factors including the faults stability,ground motion peak acceleration,seismic density,stability of rock-soil mass,susceptibility of geological hazards and sensitivity of mining collapse were selected as evaluation factors and assigned according to category.Based on the ArcGIS platform,the evaluation model of regional crustal stability was established by multi-factor weighted superposition analysis.According to the natural breakpoint method,the research region was divided into four grades,including stable region,substable region,subunstable region and unstable region.The evaluation results show that the crust in the Anhui section of the Tan-Lu fault zone is mainly in stable and substable state,accounting for 87.3%,subunstable accounting for 7.9%,and unstable only accounting for 4.8%.

关 键 词：郯庐断裂带 区域地壳稳定性 多因子加权叠加法 地质灾害 

分 类 号：P642.27[天文地球—工程地质学]