采用现场地质调查与现场测试分析相结合的方法，介绍了肖家沟泥石流的沟谷特征和形成区、流通区、堆积区特征，并从危险度、危害性两方面做出了危险性评价。结果表明：泥石流砾石含量高，冲击能量高，可判断该泥石流属于滚动推移搬运为主的泥石流。肖家沟泥石流属轻度危险，泥石流重度为1．75 kN／m3，肖家沟泥石流在清香坪堆渣之后，暴发泥石流的流速为13．69 m／s ，泥石流冲击力44．56 kPa ，对于整个堆渣体来说，此冲击力较小，不会对弃渣场的稳定性造成破坏性的影响。%Based on the geological survey and field test analysis data ,the features of Xiaojiagou gully of debris flow were introduced ,as well as the characteristics of the forming area ,circulation area and accumulation area of the debris flow . In addition ,a risk assessment was conducted from the aspects of the severeness and hazardousness of the flow .The re-sults showed that the gravel content of the flow was high ,and the impact energy was strong .So it was drawn that this flow was mainly driven by a rolling and elapsing force .Xiaojiagou debris flow was classified mild ,its weight was 1 .75 kN/m3 .After the formation of the slag field in Qingxiangping of Xiaojiagou gully ,the velocity of the debris flow became 13 .69 m/s ,the impact of debris flow was 44 .56 kPa ,for the volume of the slag field ,the impact was relatively weak , and it wouldn’t pose destructive threats to the stability of the slag field .
展开▼
