| 尾矿沉积固结对溃坝后尾矿浆体运动特性的影响探究 |
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| 引用本文： | 李智涵,甄志磊,詹美礼,王 凯,盛金昌,罗玉龙,何淑媛.尾矿沉积固结对溃坝后尾矿浆体运动特性的影响探究[J].有色金属(矿山部分),2020,72(1):111-118. |
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| 作者姓名： | 李智涵 甄志磊 詹美礼 王 凯 盛金昌 罗玉龙 何淑媛 |
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| 作者单位： | （1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098）,（1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098）,（1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098）,（1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098）,（1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098）,（1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098）,（1.山西农业大学 城乡建设学院，山西 太谷030801；2.河海大学 水利水电学院，南京210098） |
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| 基金项目： | 国家自然科学基金资助项目（51579078，51474204，51679070） |
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| 摘 要： | 沉积固结是随着时间增长土体体积压缩的过程。随着尾矿堆积时间增长,孔隙水排出,尾矿密实度增大,土体强度特性和流变特性发生变化。实际生产中尾矿坝加高过快,尾矿沉积固结不充分,不利于尾矿库的稳定,增大了灾害发生几率。通过尾矿库溃坝模型试验探究尾矿沉积固结对尾矿库溃坝后浆体运动特性的影响,研究结果表明:随着下泄距离的增加,尾矿堆积深度逐渐减小,在临近堆积区因底面坡度改变有小幅度的增大;随着沉积固结时间增长,流通区上游尾矿堆积深度逐渐增大,当沉积固结时间超过5h后,尾矿堆积深度开始减小;随着尾矿固结度增大,溃坝量逐渐减少,相较于固结0h溃坝,固结24h溃坝量减小了7%。六组试验堆积区淹没范围随时间的变化规律基本相同,但最大下泄距离随着沉积固结时间增长而减小。用分段函数拟合堆积区溃坝淹没范围随时间的变化规律,为下游防灾避险工作提供参考依据。
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| 关 键 词： | 尾矿库工程 溃坝模型试验 沉积固结 堆积深度 溃坝量 淹没范围 |
Influence of tailings sedimentation and consolidation on the movement characteristics of tailings slurry after dam break |
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| Authors: | LI Zhihan ZHEN Zhilei ZHAN Meili WANG Kai SHENG Jinchang LUO Yulong and HE Shuyuan |
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| Affiliation: | (1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China),(1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China),(1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China),(1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China),(1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China),(1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China) and (1. College of Urban and Rural Construction, Shanxi Agricultural University, TaiguShamxi030801,China;
2. College of Water Conservancy and Hydropower Engineering, Hehai University, Nanjing210098,China) |
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| Abstract: | Sedimentation and consolidation is a process of soil volume compression with time increasing. As the accumulation time of tailings increases, pore water is discharged, the density of tailings increases, and soil strength characteristics and rheological characteristics change. In actual production, the tailings dam increases too fast, tailings sedimentary consolidation is insufficient, which is not conducive to the stability of tailings reservoir and increases the probability of disasters. In this paper, tailings dam break models test was designed to explore the influence of tailings sedimentation and consolidation on slurry movement characteristics after dam break. The results indicated that the tailings accumulated depth gradually decreased with the increase of drainage distance. Accumulated depth increased slightly in the vicinity of the accumulated area, which was attributed to the change of bottom slope. With the increase of sedimentation and consolidation time, the tailings accumulated depth in the upstream of circulation area gradually increased. When the sedimentation and consolidation time exceeded 5h, the tailings accumulated depth on the upstream side began to decrease. When the tailings degree of consolidation increased, the amount of tailings dam break decreased. The dam break amount of consolidated 24h dam break test was7%, less than that of unconsolidated dam break test. The variation law of submergence range in accumulated area with time was basically the same in the test. While the maximum drainage distance decreased with the increase of sedimentation and consolidation time. Piecewise function was used to fit the variation rule of dam-break submergence range with time, which can provide reference basis for downstream disaster prevention and risk aversion work. |
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| Keywords: | tailing reservoir engineering dam breaks model test sedimentation and consolidation accumulated depth dam break quantity submerged range |
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