摘要
崩塌(危岩)是贵州地质灾害中主要灾种之一。本文利用重大地质灾害详细调查数据,研究发现贵州广泛分布的二叠系地层中,崩塌主要以倾倒式、规模为小型的地质灾害点为主;碳酸盐岩产生的崩塌众多,而溶蚀裂隙发育的栖霞组-茅口组中崩塌最发育。同时,崩塌点主要分布在贵州西北部及北部;就形成原因而言,作者认为卸荷裂隙与溶蚀裂隙的发育、陡峻的地貌形态、气候条件和地震等都是造成崩塌发育的关键因子。
Collapse （unstable rocks） is one of the major geo - hazard in Guizhou Province. When analy- zing collapses in wildly distributed Permian strata in Guizhou, by using detailed survey data of major gco - hazards, it is found that rock collapses are mainly in gravity collapse at small scale; meanwhile, those collap- ses 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.
出处
《贵州地质》
2012年第4期290-294,共5页
Guizhou Geology
基金
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
关键词
二叠纪
碳酸盐岩
崩塌
诱发因素
贵州
Permian system
carbonate rocks
collapse
formation factors
Guizhou
