Triggers of rockfall on a slope related to large ancient underground caves cultural heritage(China)
作者单位：Key Laboratory of Shale Gas and GeoengineeringInstitute of Geology and GeophysicsChinese Academy of Sciences
会议名称：《中国科学院地质与地球物理研究所2015年度（第15届）学术年会》
会议日期：2016年
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
基 金：the support of the National Natural Science Foundation of China(No.41402285) China Postdoctoral Science Foundation(No.2013M530722) International academic exchanges fund for postdoctoral fellow
关 键 词：ancient underground caves cultural heritage tectonic structures rockfall
摘 要：The large underground ancient caves of Feifeng Mountain(30,000 m2 China),located at Zhejiang Province,eastern of China,were formed by excavating the tuffaceous rocks for building stones in the ancient *** study area lies at the contact between Upper Jurassic and Upper Cretaceous sedimentary *** considering the southern slope of the Feifeng Mountain where the ancient caves are located,we observe the presence of a soft muddy-siltstone layer separating different tuffaceous *** thickness of the soft layer is about 15 in,and it plays an important role in the stability of the *** main faults control the structural setting of Feifeng Mountain:a thrust-compressional fault,with dip of 70°to 80°and dip direction of 300°;a NW fault,with dip of 75°to 85°and dip direction of 210°;and a EW fault nearest to Feifeng *** tectonic structures including tectonic faults and tectonic joints have the similar geometric characteristics at the local and regional ***,the location of rockfall has a strong relationship with the geometric characteristics of tectonic joints at the local *** triggers of the rockfall in the study area include the tectonic structures,special stratum(stuff and thick soft layer),and finally the excavation in ancient time was defined.