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针对2013年1月11日云南省镇雄县果珠乡高坡村发生山体滑坡的特点及滑坡发生过程中存在的疑问,基于灾后及时地质调查、滑坡测量、土体取样和物理力学试验,对滑坡的成灾环境和机制进行研究,结果表明:(1)在云贵高原北缘垂直气候和微地貌影响下,在所谓的旱季(1月)局地仍有较丰沛的降水;(2)历史成因和所在层位决定下三叠统飞仙关组(T1f)崩坡堆积物是一套易饱水的高孔隙度易滑土层;(3)滑源高孔隙度土饱和流态化启动和滑动液化是灾害突然发生和远程运动的力学机制;(4)结合附近煤矿小规模开采、煤层深埋和滑坡发生时无瓦斯爆炸、无塌方的事实,可以排除地下采矿诱发滑坡的猜测。镇雄滑坡的成灾地质条件和滑动机制在我国西南山区具有一定的代表性,在今后的减灾、防灾工作中需要关注。
In view of the characteristics of landslides and the problems existing in landslides during the occurrence of landslides in Gaopo Village, Guozhu Township, Zhenxiong County, Yunnan Province, January 11, 2013, based on the post-disaster geological survey, landslide survey, soil sampling and physical and mechanical tests, (1) Under the influence of vertical climate and micromorphology in the northern margin of the Yunnan-Guizhou Plateau, there is still abundant rainfall in the so-called dry season (January); (2) History The reason is that the upper Triassic Feixianguan formation (T1f) is a set of highly porous and easily accessible slippery soils; (3) And sliding liquefaction are the mechanics mechanism of sudden and remote disasters. (4) Combined with the small-scale mining in nearby coal mines, the fact that there is no gas explosion and no landslides in the deep coal seams and landslides, the speculation of underground mining-induced landslides can be ruled out. The disaster geological conditions and sliding mechanism of Zhenxiong landslide have certain representativeness in mountainous areas in Southwest China and need attention in future disaster reduction and disaster prevention work.