基于正态云模型的浏阳市永和镇岩溶塌陷易发性研究  

Study on susceptibility of karst collapse based on normal cloud model in Yonghe town,Liuyang City

作　　者：鲁玉龙 叶高峰 杨仙 卢治林 刘洋[1] 张联志 李干龙 LU Yulong;YE Gaofeng;YANG Xian;LU Zhilin;LIU Yang;ZHANG Lianzhi;LI Ganlong(School of Earth Sciences and Spatial Information Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;College of Civil Engineering,Hunan City University,Yiyang,Hunan 4130003,China;The Second Team of Hunan Bureau of Nonferrous Geological Prospecting,Xiangtan,Hunan 411102,China)

机构地区：[1]湖南科技大学地球科学与空间信息工程学院,湖南湘潭411201 [2]湖南城市学院土木工程学院,湖南益阳413003 [3]湖南省有色地质勘查局二总队,湖南湘潭411102

出　　处：《中国岩溶》2023年第6期1294-1302,共9页Carsologica Sinica

基　　金：湖南省自然科学基金项目(2021JJ40197)。

摘　　要：在对浏阳市永和镇既有岩溶塌陷进行详细勘查的基础上,选取了岩溶发育程度(钻孔溶蚀率)、与区内断层的距离、上覆土层厚度、岩溶水特征、与人工抽水漏斗中心的距离以及地面塌陷现状(地面塌陷密度)等6个岩溶塌陷易发性评价因子,提出了赋值条件及赋值范围,并根据既有塌陷的评价因子评分状况,采用熵值法获取了评价因子的权重,基于正态云模型对研究区岩溶塌陷灾害的易发性进行了评价。正态云模型评价结果中既有岩溶塌陷均分布在岩溶塌陷高易发区,而层次分析法评价结果中3个既有塌陷分布在岩溶塌陷中易发区,说明正态云模型在处理类似岩溶塌陷易发性评价等模糊性及随机性问题时比层次分析法更精准。Ground collapse is a common geological disaster in karst area,which would bring great harm to people's life and property.The zoning evaluation on karst collapse susceptibility is beneficial to the classification and treatment of the disaster in order to ensure safety and economy.Karst ground collapse is characterized by suddenness,concealment,multi-factor,randomness and fuzziness;therefore,it is difficult to be fully quantified.The normal cloud model could effectively reflect the fuzziness and randomness of objective things,and integrate them to form the mapping between qualitative and quantitative analyses.In this paper,based on the normal cloud model,the study on susceptibility of karst collapse in Yonghe town,Liuyang City has been conducted in order to provide a basis for the classification and treatment of ground collapse in this area,and also provide a reference for the susceptibility evaluation of karst collapse in other areas.The study area is located to the northeast of Liuyang City,24 km away from it,and its administrative division is located in Yonghe town,Liuyang City,Hunan Province.Ground collapses in this area are all developed in the distribution area of soluble rock layer.The most developed layer is the second member of the Lower Permian Qixia Formation(P1q2)with thick-layered carbonate rocks.Secondarily,ground collapses are distributed in the middle and upper Carboniferous Hutian Group(C2+3ht).The study area covers an area of 14 km2,and 38 karst collapses have occurred in this area so far.Among these collapses,22 have been surveyed and filled.Sixteen collapses,four of which have been filled,have been investigated in detail.The collapse sites are mainly distributed in the region of soluble rock where faults are developed and surface water and groundwater are closely connected.Geographically,the collapse sites are mainly distributed in Yueshan Formation-Oujia Formation-Dahe Formation,Yongfu village,Yonghe town,Juxiang community-the old street of Yonghe-Huayuan village,Yanxi town,Nanshan Formation-Li

关 键 词：岩溶 地面塌陷 评价因子 正态云模型 易发性 

分 类 号：P642.26[天文地球—工程地质学]