冻融环境下露天矿边坡稳定性和变形特性研究
Study on stability and deformation characteristics of open-pit slope under freeze-thaw environment
杨舒冰 1陈雄 2董黎明 3蒋瑛 4徐建超5
作者信息
- 1. 中安国泰(北京)科技发展有限公司,北京 101318
- 2. 太原钢铁(集团)有限公司矿业分公司尖山铁矿,山西 太原 030000
- 3. 华能伊敏煤电有限责任公司,内蒙古 呼伦贝尔 021100
- 4. 内蒙古源源能源集团有限责任公司,内蒙古 通辽 029200
- 5. 包头市应急综合保障中心,内蒙古 包头 014010
- 折叠
摘要
为分析冻融环境下露天矿山边坡稳定性影响机理,选取内蒙古某露天矿山为研究区,采用合成孔径边坡雷达监测技术,对该矿采场边坡进行连续不间断监测,研究冻土融化以及渗流作用影响下露天矿山边坡变形规律.研究结果表明:冰冻期加之渗流作用导致边坡表面土体出现冷冻膨胀现象,变形量增加;长期冰冻状态使得边坡内部应力分布逐渐趋于稳定,从而减缓变形速度;解冻过程中,边坡土体产生收缩变形,加剧了边坡软弱层的破坏,从而降低边坡整体稳定性.因此研究冻融及渗流条件下边坡变形机理可为露天矿边坡长期稳定性评价提供基础依据及工程指导,并为露天矿山边坡安全监测提供一定参考.
Abstract
In order to analyze the influence mechanism of open-pit mine slope stability under freeze-thaw environment,an open-pit mine in Inner Mongolia was selected as the research area,and the radar monitoring technology of synthetic aperture slope was adopted to conduct continuous and continuous monitoring of the mine slope,and the deformation rule of open-pit mine slope under the influence of permafrost melting and seepage was studied.The results show that the soil surface of the slope is frozen and expanded during the freezing period and seepage,and the deformation increases.The long-term freezing state makes the internal stress distribution of the slope gradually stable,thus slowing down the deformation rate.During the thawing process,the soil mass of the slope shrinks and deforms,which intensifies the damage of the weak layer of the slope and reduces the overall stability of the slope.Therefore,the study of slope deformation mechanism under freeze-thaw and seepage condi-tions can provide the basis and engineering guidance for the long-term stability evaluation of open-pit slope,and provide a certain reference for the safety monitoring of open-pit slope.
关键词
冻融/渗流/边坡雷达/边坡稳定性/安全监测Key words
freeze-thaw/seepage/slope radar/slope stability/safety monitoring引用本文复制引用
基金项目
中国安全生产科学研究院基本科研业务费专项资金项目(2023JBKY04)
国家矿山安全监察局安全生产科研攻关项目(第一批)()
出版年
2024
NETL
NSTL
万方数据