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放矿是选矿厂将尾矿用管道输送至尾矿库堆存的矿山生产环节之一,其输送的尾矿含有大量水,影响尾矿坝渗流场。基于饱和—非饱和渗流理论,以某尾矿坝扩容加高工程为例,建立三维有限元渗流分析模型,依据尾矿输送实际情况,模拟运行期放矿条件下的尾矿坝渗流场,分析了放矿流量对尾矿坝渗流场的影响。结果表明,运行期放矿对尾矿坝渗流场的影响主要集中在尾矿沉积滩入渗面以下约32m深处;放矿流量越大,入渗面附近浸润面抬升越大且暂态饱和区越厚;放矿入渗受尾矿料的入渗能力限制,放矿流量超过一定值后,放矿水直接流入尾矿库,其影响不再扩大。研究成果可为尾矿坝的安全运行提供技术支持。
Ore is the ore dressing plant will be tail pipe pumped to the tailings piling stockpiling mine production processes, the tailings contain large amounts of water transported, affecting the tailings dam seepage field. Based on the theory of saturated-unsaturated seepage, taking a dam expansion project as an example, a three-dimensional finite element model of seepage analysis is established. Based on the actual situation of tailings transportation, the seepage field of tailings dam under operating conditions is simulated and analyzed Effect of ore discharge on seepage field of tailings dam. The results show that the impact of ore draining on the seepage field of tailings dam during operation is mainly located about 32m below infiltration surface of tailings deposit beach. The larger the ore discharge rate, the larger the infiltration surface near infiltration, and the transient saturation The thicker the area is; the infiltration into the ore is limited by the infiltration capacity of the tailings material. After the ore discharge flow exceeds a certain value, the ore ore directly flows into the tailings pond and its influence no longer expands. The research results can provide technical support for the safe operation of tailings dam.