南芬露天铁矿下盘高陡边坡稳定性分析与监测预警技术研究

发布时间：2018-06-27 23:15

本文选题：高陡边坡 + MSARMA　；参考：《采矿与安全工程学报》2017年05期

【摘要】：随着矿山开采的进行,南芬露天铁矿形成高差约456 m,整体坡度达46°的高陡边坡,多次出现张裂、滑塌等地质灾害。首先,对滑坡区域工程地质条件进行分析,得出滑坡特征与机理。然后,进行基于MSARMA法的边坡稳定性定量评价与敏感性分析,建立排水条件下边坡稳定性分析方法,并验证了排水有效性,利用FLAC~(3D)进行边坡扩帮工程稳定性模拟。最后,提出采用坡体排水与预裂爆破技术,同时构建基于滑动力远程实时监测预警系统的滑坡体监测网。研究结果表明:滑体在降雨与扩帮工程影响下会再次滑移,采用预裂爆破技术与排水措施有效提高边坡稳定性,20个监测点组成的滑坡体监测网成功实现了南芬下盘边坡稳态实时监控与预测预报。
[Abstract]:With the development of mining, Nanfen opencast iron mine has formed a high and steep slope with a height difference of about 456 m and a whole slope of 46 掳. Firstly, the characteristics and mechanism of landslide are obtained by analyzing the regional engineering geological conditions. Then, the quantitative evaluation and sensitivity analysis of slope stability based on MSARMA method are carried out, and the slope stability analysis method under drainage condition is established, and the effectiveness of drainage is verified. The slope expansion engineering stability simulation is carried out by using FLAC~ (3D). Finally, a landslide monitoring network based on remote real-time monitoring and early warning system of sliding power is constructed by using slope drainage and pre-splitting blasting technology. The results show that the sliding body will slip again under the influence of rainfall and extension engineering. Pre-splitting blasting technique and drainage measures are used to improve slope stability effectively. The landslide body monitoring network composed of 20 monitoring points has successfully realized the real-time monitoring and prediction of Nanfen downboard slope steady-state.
【作者单位】：中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室力学与建筑工程学院;北京科技大学土木与资源工程学院;
【基金】：北京市自然科学基金项目(8142032)
【分类号】：TD854.6

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