豫西某金矿矿渣转化为泥石流物源的危险性评价  

Risk assessment of debris flow source from a gold slag heap in western Henan

作　　者：刘星宇 刘向东[1] 赵浩 周永红 李强[1] 冯宇婷 LIU Xingyu;LIU Xiangdong;ZHAO Hao;ZHOU Yonghong;LI Qiang;FENG Yuting(Xi’an Mineral Resources Survey Center of China Geological Survey,Xi’an,Shaanxi 710100,China;Jilin Mengxi Engineering Management Co.Ltd.,Jilin,Jilin 132000,China)

机构地区：[1]中国地质调查局西安矿产资源调查中心,陕西西安710100 [2]吉林梦溪工程管理有限公司,吉林吉林132000

出　　处：《中国地质灾害与防治学报》2022年第5期29-39,共11页The Chinese Journal of Geological Hazard and Control

基　　金：中国地质调查局地质调查项目(ZD20220218)。

摘　　要：矿渣在沟谷的堆积形态、压占比例影响其在特定降雨概率下的稳定性。文中以豫西某金矿2条主沟16个渣堆为研究对象,提出在不同降雨概率雨力条件下单个渣堆稳定性计算方法。即近10年来最大观测雨强、25年一遇(P=4%)雨强、50年一遇雨强(P=2%)、100年一遇雨强(P=1%)条件下的启动流速(U_(c))以及泄洪流速(U_(s)),令稳定系数F_(s)=U_(c)/U_(s),计算出渣堆的稳定系数,研究成果对于不同特定雨力工况下渣堆的危险性评价及分类防治有一定意义。The slag accumulation form and the proportion of slag in the valley affect its stability under a specific rainfall probability.This paper takes 16 slag piles in two main trenches of a gold mine in western Henan as the research object and proposes a calculation method for the stability of a single slag pile under different rainfall probability conditions.That is,the start-up under the conditions of maximum observed rain intensity in recent years,rain intensity once in 25 years(P=4%),rain intensity once in 50 years(P=2%),and rain intensity once in 100 years(P=1%).The flow rate and the flow rate of the flood discharge,the ratio of which is calculated to analyze the stability of the slag pile.The research results have certain significance for the risk assessment of specific slag piles and the classification and prevention of slag piles.

关 键 词：矿渣型泥石流 渣堆 泄洪流速 启动流速 洪峰流量 

分 类 号：P642.23[天文地球—工程地质学]