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《Guizhou Geology》 2012-04
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Analysis on the Development Characteristics and Formation Factors of Collapse(Unstable rock) at Permian Strata in Guizhou

XIE Xing-neng,YANG Sheng-yuan,ZHAO Guo-xuan,ZHANG Jian-jiang(Institute of Geo-environmental Monitoring of Guizhou Province,Guiyang 550004,China)  
Collapse(unstable rocks) is one of the major geo-hazard in Guizhou Province.When analyzing collapses in wildly distributed Permian strata in Guizhou,by using detailed survey data of major geo-hazards,it is found that rock collapses are mainly in gravity collapse at small scale;meanwhile,those collapses are more developed in carbonate rocks,especially in Qixia-Moukou groups whose dissolution fissures are developed.Moreover,the locations of collapses are mostly in the northwest and north of the province.As to the key factors causing collapse,the authors suggest that they are unloading fracture,dissolution fracture,steep landforms,climatic conditions and earthquakes.
【Fund】: 贵州省地质灾害监测预警与决策支持平台研究(黔财建[2010]464);; 贵州典型地质灾害成灾模式及预警预报关键技术研究(黔科合重大专项字[2011]6004);; 关岭6.28滑坡地质灾害形成机理及数值模拟反演研究(黔地矿科合[2011]9)联合资助
【CateGory Index】: P642.21
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