尾矿坝辐射井降水模型
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摘要
尾矿坝浸润线过高是金属矿山企业面临的一大安全隐患,在尾矿坝建立辐射井是降低坝体浸润线的有效手段,渗流浸润线的确定与排渗量的计算是尾矿坝辐射井设计和布设需要解决的关键问题。分析了现场实测浸润线数据,发现尾矿坝辐射井作用下的降水曲线有如下特征:辐射管长度范围内浸润线形状为下凹的指数函数曲线;辐射管长度范围外浸润线形状为上凸的对数函数曲线。推导了尾矿坝辐射井的降水曲线模型和排渗量模型,对比模型计算数据和现场实测数据并进行误差分析,计算结果显示:该模型中浸润线、排渗量的计算值与现场实测数据较为接近,可用于辐射井浸润线位置和排渗量的预测。
The high saturation line is a potential safety hazard for metal mines. Establishing radiation well is an effective method for decreasing the saturation line in tailings dam. The determination of saturation line location and the calculation of drainage amount are key problems when building radiation well in tailings dam. After analyzing the field saturation line data,the characteristics of saturation line under the effect of radiation well were summarized as follows: Within the range of radiant tube,the curve of saturation line is an exponential function with an inside cave. Beyond the range of radiant tube,the curve of saturation line is a logarithmic function with an outside cave. The model of saturation line and the seepage model at radiation well were deduced. The comparison between the field test and theoretical data is made and the error is analyzed. It is shown that the calculated values of saturation line and drainage amount by the model agreed well with the measured. This model can be used to predict the position of saturation line and the water drainage amount.
The high saturation line is a potential safety hazard for metal mines. Establishing radiation well is an effective method for decreasing the saturation line in tailings dam. The determination of saturation line location and the calculation of drainage amount are key problems when building radiation well in tailings dam. After analyzing the field saturation line data,the characteristics of saturation line under the effect of radiation well were summarized as follows: Within the range of radiant tube,the curve of saturation line is an exponential function with an inside cave. Beyond the range of radiant tube,the curve of saturation line is a logarithmic function with an outside cave. The model of saturation line and the seepage model at radiation well were deduced. The comparison between the field test and theoretical data is made and the error is analyzed. It is shown that the calculated values of saturation line and drainage amount by the model agreed well with the measured. This model can be used to predict the position of saturation line and the water drainage amount.
引文
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[2]李建荣.辐射井排渗在降低尾矿坝体浸润线中的应用[J].有色矿山,2001,30(6):42-43.Li Jianrong.Application of water seepage drainage by radiation well in dropping dam saturation line[J].Nonferrous Mines,2001,30(6):42-43.
[3]刘太政,赵竞崔,良忠,等.辐射井自流排渗技术在尾矿坝除险加固上的应用[J].现代矿业,2011(6):91-95.Liu Taizheng,Zhao Jingcui,Liang Zhong,et al.Gravity-flow seepage technique of radiation wells in the reinforcement of tailings dam[J].Modern Mining,2011(6):91-95.
[4]汪良峰,朱君星,项宏海,等.尾矿库排渗辐射井的设计探讨[J].金属矿山,2010(2):55-56.Wang Liangfeng,Zhu Junxing,Xiang Honghai,et al.Discussion on design of radiation wells for tailings seepage drainage[J].Metal Mine,2010(2):55-56.
[5]李学民,郑海远.尾矿坝辐射井的设计与应用[J].矿冶,2009,18(3):21-23.Li Xuemin,Zheng Haiyuan.Application and design of tailings dam radiation wells[J].Mining&Metallurgy,2009,18(3):21-23.
[6]王允麒,王涟,孙存忠.辐射管集水计算模型研究[J].工程勘察,1995(5):26-28.Wang Yunqi,Wang Lian,Sun Cunzhong.Study on calculation model of radial pipe drainage[J].Geotechnical Investigation&Surveying,1995(5):26-28.
[7]瞿兴业.黄土地区辐射井出水量计算方法初步探讨[J].陕西水利科技,1978(2):34-46.Qu Xingye.Preliminary discussion on calculating method of radial well drainage in loess area[J].Shaanxi Water Resources,1978(2):34-46.
[8]刘鹤年.流体力学[M].北京:中国建筑工业出版社,2004.Liu Henian.Fluid Mechanics[M].Beijing:China Building Industry Press,2004.