| 小秦岭大湖峪矿渣型泥石流的物源特征及其危险度评价 |
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| 引用本文： | 陈华清,徐友宁,张江华,何芳,刘向东,曹琰波.小秦岭大湖峪矿渣型泥石流的物源特征及其危险度评价[J].地质通报,2008,27(8):1292-1298. |
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| 作者姓名： | 陈华清 徐友宁 张江华 何芳 刘向东 曹琰波 |
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| 作者单位： | 1. 中国地质调查局西安地质调查中心,陕西,西安,710054
2. 长安大学,陕西,西安,710054 |
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| 基金项目： | 中国地质调查局地质调查项目，中国地质调查局地质调查项目，中国地质调查局地质调查项目 |
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| 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。
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| 关 键 词： | 矿渣型泥石流 物源 危险度评价 小秦岭大湖峪 |
Source characters and risk assessments of mine slag-type debris flows in the Dahu valley, Xiaoqinling |
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| CHEN Hua-qing,XU You-ning,ZHANG Jiang-hu,HE Fang,LIU Xiang-dong,CAO Yan-bo.Source characters and risk assessments of mine slag-type debris flows in the Dahu valley, Xiaoqinling[J].Geologcal Bulletin OF China,2008,27(8):1292-1298. |
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| Authors: | CHEN Hua-qing XU You-ning ZHANG Jiang-hu HE Fang LIU Xiang-dong CAO Yan-bo |
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| Abstract: | Gold mining operations were very active in the Dahu valley, Linbao 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. |
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| Keywords: | mine slag-type debris flow material source risk assessment Dahu valley Xiaoqinling |
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