摘要
为了满足矿山生产需要,凉山矿业公司经过综合比较后,对即将达到原设计坝高的新厂沟尾矿库进行加高扩容改造,以延长尾矿库的服务年限。由于该尾矿库在使用过程中,坝体浸润线一直偏高,在堆积坝坡面上经常有水渗出,坝坡面出现沼泽化、局部坍塌等。现场勘察揭示坝体浸润线埋深较浅。因此,在实施加高扩容前,需要对坝体过高的浸润线进行治理。综合考量后,决定采用上向弯曲双向槽孔排渗管技术,分别在初期坝坝顶、第5级和第8级子坝处施工三排上向弯曲钻孔,孔内安置双向槽孔排渗管,实施坝体排渗加固。2009年底排渗工程竣工后,经过两年多时间的检验,经现场踏勘和坝体浸润线观测,结果表明,该项排渗工程效果显著,使该尾矿库能够满足加高扩容的要求。
In order to meet the mine production needs,after a comprehensive comparison,the Liangshan Mining Company made a decision to continuously heighten the tailings dam of Xinchanggou tailings pond that will soon reach the original design life,which will extend the service life of this tailing pond.During the service of tailings pond,the phreatic surface of tailing dam has been high,and the slope surfaces often have water seepage which caused marsh and partial collapse of slope surfaces.The site survey revealed the shallow phreatic surface of tailing dam.Therefore,before heightening the tailings dam,the excessive high phreatic surface has to be controlled by using some measures.After comprehensive consideration,it was decided to adopt up-curved two-way hole-slot drainage tube technology;three lines of up-curved hole were implemented on the top of first dyke,fifth sub-dam and eighth sub-dam,respectively,and two-way hole-slot drainage tubes were put into the holes for the dam drainage reinforcement.Drainage works have been completed by the end of 2009,after more than two years of the test,through the site check and seepage line observations,the results show that the drainage project are very well,and the tailing dam meets the heightening of the expansion requirements.
出处
《中国地质灾害与防治学报》
CSCD
2013年第1期65-69,共5页
The Chinese Journal of Geological Hazard and Control
基金
中国博士后科学基金资助项目(20070420123)
关键词
尾矿坝
水平排渗
矿山安全
稳定性分析
Tailings dam
horizontal drainage
mine safety
stability analysis
