摘要
河南省灵宝市大湖峪峪道金矿开采活动强烈,采矿废渣成为当地泥石流主要的物源隐患。在2007年对峪道内采矿废渣堆进行实地调查的基础上,依据矿渣型泥石流的特点,选择渣堆规模、河道堵塞程度、渣堆稳定性、沟谷纵坡降比、河流弯曲度和沟谷汇水面积6个因子,利用层次分析法确定各因子的权重,进而对大湖峪主峪道及其支沟进行了泥石流危险度评价。结果表明,13条沟谷中有10条为高危险度区,其中东峪黑峪子沟、东峪主峪道、西峪东槽桐沟和槽桐沟均为泥石流极高危险区。大湖峪泥石流危险度评价结果为泥石流的防治和预警提供了科学依据。
Gold mining operations were very active in the Dahu valley, Lingbao City, Henan Province, and plenty of mine slagheaps became the main source of the debris flows. According to the characteristics of the slag-type debris flow and on-the-spot investigation of the slagheaps in the valleys in 2007, the authors assessed the risk degrees of debris flows in the main course and tributaries of the Dahu valley by using six factors, i.e. slagheap size, clogging degree of the watercourse, slagheap stability, longitudinal slope ratio of the valley, river curvature and catchment area of the valley, whose weights were established using the analytic hierarchy process. The results indicate that 10 of the 13 valleys are high-risk areas, of which the Heiyuzi gully and the main watercourse of the East valley and the East Caotong valley and West Caotong valley of the West valley are very high-risk areas of debris flows. The hidden trouble of slag-type debris flow in the Dahu valley was very serious. The assessments provide a scientific basis for the early warning, prevention and control of debris flows in the Dahu valley.
出处
《地质通报》
CAS
CSCD
北大核心
2008年第8期1292-1298,共7页
Geological Bulletin of China
基金
中国地质调查局国土资源调查项目《小秦岭金矿区环境地质问题调查与评价》(编号:1212010741003)
《重点矿区环境地质问题专题调查》(编号:200412300057)
《陕西潼关金矿区环境地质问题专题调查》(编号:200412300057-1)资助。
关键词
矿渣型泥石流
物源
危险度评价
小秦岭大湖峪
mine slag-type debris flow
material source
risk assessment
Dahu valley, Xiaoqiuling
