甘肃陇南某露天矿边坡顶部黄土覆盖层蠕变规律  

The creep deformation pattern of the top loess cover layer on a slope of an open-pit mine in Longnan,Gansu

作　　者：肖亚辉 张朝辉 XIAO Yahui;ZHANG Chaohui(Longnan Zijin Mining Co.,Ltd.,Longnan 742200,Gansu,China)

机构地区：[1]陇南紫金矿业有限公司,甘肃陇南742200

出　　处：《矿产勘查》2024年第S01期97-102,共6页Mineral Exploration

摘　　要：甘肃陇南地处秦巴山区,与甘肃黄土高原相连,部分露天矿地质条件为上部黄土下部岩体。由于黄土和岩体变形特征不同,导致了独特的露天矿山边坡变形,给边坡管理和安全生产带来挑战,特别是黄土覆盖层蠕变严重影响边坡安全。本文通过边坡雷达监测、无人机航测、监控视频和现场巡查等手段对某露天矿进行了综合监测。监测结果显示,M沟采场南帮顶部黄土覆盖层蠕变受季节变化影响较大:春季受降雨影响变形逐渐加速;夏季降雨和基岩弱化加剧变形,易引发失稳破坏;秋季降雨减少,变形逐渐减弱;冬季受基岩冻融间接影响,变形再次加剧。研究成果揭示了M沟采场黄土覆盖层的蠕变规律,为该矿区的黄土覆盖层监测治理方案提供了核心思路,同时对该类型的其他边坡安全生产具有一定借鉴意义。Longnan,Gansu,located in the Qinba mountainous area and adjacent to the Loess Plateau of Gansu,some of the geological conditions of the open-pit mines are upper loess and lower bedrock.Due to the differ-ent deformation characteristics of loess and bedrock,it has led to unique deformation of the slopes of the open-pit mines in Gansu,posing challenges to slope management and safety production,especially the serious creep deformation of the loess cover layer affecting slope safety.This paper comprehensively monitored the slopes through methods such as slope radar monitoring,unmanned aerial surveying,monitoring videos,and on-site inspections.The monitoring results showed that the creep of the loess cover layer at the top of the southern slope of the M Gully mining area is greatly affected by seasonal changes:in spring,the creep gradually accelerates under the influence of rainfall;in summer,rainfall and rock weakening intensify the creep,which easily leads to instabil-ity and damage;in autumn,rainfall decreases,and the creep gradually weakens;in winter,the creep is intensi-fied again due to the indirect influence of rock freezing and thawing.The research findings reveal the creep law of the loess cover layer in the M Gully mining area,providing core ideas for monitoring and governance schemes of the loess cover layer for the mine,and have certain reference significance for the safety production of other slopes of this type.

关 键 词：露天边坡 黄土 蠕变 边坡雷达 监测治理 

分 类 号：X936[环境科学与工程—安全科学]