(1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室，北京 100083；
2. 北京科技大学 土木与环境工程学院，北京 100083)
摘 要: 含水率对矿堆内气液流动状态和溶质运移具有重要影响，气体渗透率随含水率的增高而降低，溶液渗透率和溶质运移通量均随含水率的增大而增大。通过开展矿堆含水率管柱实验，研究矿石粒径和溶液喷淋强度对矿堆含水率的影响规律，并利用Design-Expert软件对实验数据进行响应曲面分析，得到含水率关于喷淋强度和矿石粒径的拟合方程。结果表明：喷淋强度和矿石粒径均对矿堆含水率有重要影响。含水率随着矿石粒径的增大而减小，随喷淋强度的增大而增大。矿石粒径对矿堆含水率的影响大于溶液喷淋强度的影响，矿石粒径越大，溶液喷淋强度对矿堆含水率的影响越小。
关键字: 堆浸；含水率；气液渗流；溶质运移；矿石粒径；喷淋强度
（1. Key Laboratory of High-Efficient Mining and Safety of Metal, Ministry of Education,
University of Science and Technology Beijing, Beijing 100083, China;
2. School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China）
Abstract:The moisture content has significant influence on the state of gas-liquid flow and solute transport in ore heap. The gas permeability decreases with increasing the moisture content. While the liquid permeability and solute transport flux both increase with broadening the moisture content in ore heap. Several column tests were performed using periodic infiltration of water on columns composed of ore. To explore the effect of ore particle size and irrigation rate on moisture content in the ore heap. Response surface analysis of experimental data was conducted by adopting the Design-Expert software, and the fitting equation of moisture content on irrigation rate and particle size was provided. The result shows that the moisture content decreases with increasing the ore size, and the moisture content increases as the irrigation rate increases. The ore size has more important role than the irrigation rate on moisture content in ore heap. The bigger the particle size is, the smaller the impact of irrigation rate on moisture content is.
Key words: heap leaching; moisture content; gas-liquid flow; solute transport; ore size; irrigation rate
