兴宁乌石坑沟特大矿渣型泥石流灾害特征及危险性评价  

Mine-slag Debris Flows Disaster Characters from Wushikeng Ravine in Xingning and Risk Assessment

作　　者：黄家华[1] 冯文凯[1] 艾国海 吴刚[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《科学技术与工程》2016年第2期94-99,共6页Science Technology and Engineering

基　　金：国家自然科学基金(41572291)资助

摘　　要：广东省兴宁乌石坑沟是一条典型的矿渣型泥石流沟,物源规模巨大,泥石流频繁且危害性大,因此对其科学预测和危险性评价具有重要意义。在现场详细调查和大量测量的基础上,对该沟泥石流的成因机制及动力学参数进行了分析、计算。再通过对矿渣型泥石流各影响因子进行定量分析,选取堆渣规模、流域面积、渣堆稳定性等9个评价因子,建立基于层次分析法对泥石流危险度评价的数学评价模型,对研究区泥石流进行了危险性评价。研究表明,该沟泥石流危险度为0.626,属高度危险,评价结果与实际情况相吻合,可为乌石坑沟泥石流防治工程提供可靠的依据。Wushikeng gully is located in Xingning,Guangdong province is a typical mine-slag debris flow gully,there is substance on a large scale at the source,there are frequent debris flows and they have great harm,so it has important significance to do scientific predictions and hazard evaluation. Based on the field investigation and lots of measurements,the formation mechanism and dynamical parameters of the debris flow were analyzed and calculated. Then the impact factors of the mine-slag debris flows have been analyzed quantitatively,nine impact factors have been selected,and based on the mathematic evaluating model of APH on the hazard evaluation of debris flows,the result of evaluation has coincided with the real situation. The study has indicated that the mathematic evaluating model on the hazard evaluation of this kind of debris flow in this thesis is feasible.

关 键 词：矿渣泥石流 层次分析法 危险性评价 广东兴宁 

分 类 号：P642.23[天文地球—工程地质学]