Abstract Liquid flow behavior is a key factor that affects the leaching rate and metal extraction of stope leaching (SL), but related experimental studies are very limited. The liquid spread mechanism of SL is complicated because of the high-temperature conditions, the structural characteristics of the stope, and the pore characteristics of the ore heap. In this study, a device was developed to investigate the liquid spread mechanisms of the upper wall and foot wall of the stope. The influence of temperature, dip angle, and flow rate on the liquid spread was investigated. It is shown that the most significant feature of liquid spread in a stope is the liquid flow towards the bottom of the stope vertically rather than horizontal liquid spread. The increase of temperature accelerates the liquid spread, leading to the emergence of preferential flow paths. When the dip angle decreased from 90° to 60°, the liquid spread along the foot wall increased, including the change of the preferential spread direction, though the initial wetting time of the upper wall decreased. Increasing the flow rate within a certain range does not result in a more obvious liquid preferential flow path. Although the liquid spread of stope leaching still requires more studies in detail, the results of this work could be helpful to understand industrial stope leaching mechanisms.

中文翻译：

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高温地下采场浸出液体扩散机制

摘要 液体流动行为是影响采场浸出（SL）浸出率和金属提取的关键因素，但相关实验研究非常有限。由于高温条件、采场结构特征和矿堆孔隙特征，SL的液体扩展机制较为复杂。在这项研究中，开发了一种装置来研究采场上壁和下壁的液体扩散机制。研究了温度、倾角和流速对液体扩散的影响。结果表明，采场液展最显着的特征是液体垂直流向采场底部，而不是水平液展。温度升高加速液体扩散，导致优先流动路径的出现。当倾角从90°减小到60°时，液体沿底壁的扩散增加，包括优先扩散方向的变化，但上壁的初始润湿时间减少。在一定范围内增加流速不会产生更明显的液体优先流路。虽然采场浸出的液体扩散还需要更多的详细研究，但这项工作的结果可能有助于理解工业采场浸出机制。在一定范围内增加流速不会产生更明显的液体优先流路。虽然采场浸出的液体扩散还需要更多的详细研究，但这项工作的结果可能有助于理解工业采场浸出机制。在一定范围内增加流速不会产生更明显的液体优先流路。虽然采场浸出的液体扩散还需要更多的详细研究，但这项工作的结果可能有助于理解工业采场浸出机制。