贵州纳雍崩塌式滑坡成灾特征及其避灾警示作用

纳雍滑坡是一个典型的崩塌式滑坡,灾害由灰岩陡崖上的崩塌引起,崩塌体滑落推动陡崖下的斜坡坡积层土体产生滑动,将下部的18户村民住房掩埋,死亡44人,财产损失一百万元以上。纳雍滑坡发生在石灰岩与煤系地层互层的地区,坡体呈上硬下软的地质结构,形成山顶为高陡的危崖,下部为斜坡,坡脚平缓的地貌特征。纳雍滑坡发生前有着明显的前兆现象,因此,加强山地灾害防灾避灾的基本知识教育,对山地灾害多发地区灾害发生的可能性进行预测和危险程度区划,是防止类似灾害发生的最有效方法。

Characteristics of the falling-slide type landslide in Nayong in Guizhou Province and the lessons learned for disaster mitigation in other areas

Nayong landslide is a typical falling landslide,which is caused by the falling of ash-rock on the cliff.The slope lamination earth below the cliff was slid caused by body of falling.18 farmer's houses were buried and 44 person were died in the disaster,which caused 1 million yuan lost.Nayong landslide was occurred in the mutual area of layers of lime and coal,where the geologic structure of slope includes rigid top and flexible underside.The characteristics of relief is the top of mountain is high and steep,the below of mountain is ramp and the foot of mountain is mild.There had many auspices before Nayong landslide happened.Therefore,the case in Nayong landslide shows that in order to prevent the similar disaster occurring,the primary knowledge of defending and avoiding mountain hazards should be instruct,the probability of mountain hazards in those area should be forecast and compartmentalization of dangerous degree should be compartmentalized.