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Main Mechanism and Fatalness Evaluation of Rockfall in Juma River Region, the North of Taihang Mountain

Author: GaoWei
Tutor: ZhangChuanHeng
School: Chinese Geology University (Beijing)
Course: Ecological geology
Keywords: Juma Bai Lixia region Collapse rockfall Tectonic disruption Risk assessment
CLC: P642.21
Type: Master's thesis
Year: 2009
Downloads: 73
Quote: 1
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Abstract


In this paper, Juma Bai Lixia regional tectonic joints and collapse rockfall development as the research object , collapse rockfall risk assessment as the theoretical basis , through observation field structural joints , supporting , staging and measurement , indoor large-scale remote sensing images constructed on the analysis of the rupture zone , the stereographic projection of structural joints installments each indicator elements of quantitative risk assessment work to draw the following conclusions : (1) draw collapse types of Bai Lixia region there are four , three of which collapse type dump - collapse , sliding collapse, pull the crack collapse widespread outcrops . Second , the area joint spacing , density , jointed by its own gravity characteristics determine the region of Bai Lixia rockfall There are three types , including dumping type rockfall rockfall from the fall- universal development . Rockfall in the region collapsed qualitative research , to help further quantitative measures to assess the degree of danger of geological disasters in the region and asked the prevention of geological disasters aversion . ( 2 ) found that the the four conjugate shear joints were cut Bai Lixia region of northern Hebei Yesanpo sedimentary cover Cambrian and Middle Proterozoic Wumishan group , the study area conjugate shear joints constructed period times are Indosinian and early Yanshanian late Yanshanian and Himalayan period , four conjugate the shear joint distribution in Bai Lixia three trench . (3) control Bai Lixia joint development and collapse rockfall impact of two conjugate shear joints are trending westward and NEE to the Himalayan period and to the north-east and east-west as early Yanshanian . The early Yanshanian NE and EW the tectonic rupture zone control Bai Lixia areas Begonia Tongkuangyu , of ten hanging Gap two ditch fracture distribution , the trend of the fracture and the joint development . Himalayas of the North West to NEE joints to control scorpions ditch . ( 4 ) The studies Bai Lixia region collapse rockfall risk assessment factors indicators weighted score table and risk assessment maps , this quantitative findings contribute to the prevention of Bai Lixia collapse rockfall done according to local conditions , the disaster to avoid targeted, but at the same time to assess the results need to be tested in the collapse rockfall prevention .

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CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Engineering Geology > The geological and engineering geological > Collapse
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