The similar material research method was adopted in this research to study the generation and migration law of dust in the process of discharge. The study result shows that the relation between the dust concentration and discharge rate in the unloading area is c = 6.622(M_pr)^0.37348 for real conditions derived from similar materials experiment, which can be verified mutually with the numerical simulation result. When the natural air flow in real conditions increased to 1.89 m/s, the dust concentration reached the maximum value, and then, the dust diffusion rate accelerated and the dust concentration decreased. The smaller the ore particle size, the larger the area of interaction with the air, and the larger the dust concentration. An increase of the ore moisture content can reduce the dust concentration and keep the dust concentration at a low level. Additionally, the moisture content of the ore powder without hardening was 4.17–8%. As the height of the intermediate mine heap increased, the dust produced by both falling and impact decreased, and the dust concentration decreased. The dust removal effect of installing the seal cover was verified. The research results can provide a reference for dust control of an intermediate mine heap.

中文翻译：

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类似材料在中间矿堆中的粉尘迁移模拟

本研究采用相似材料研究方法研究排放过程中粉尘的产生和迁移规律。研究结果表明卸料区粉尘浓度与排放量的关系为c  = 6.622( M _pr ) ^0.37348对于类似材料实验得出的真实条件，可以与数值模拟结果相互验证。当实际条件下自然气流增加到1.89 m/s时，粉尘浓度达到最大值，随后粉尘扩散速度加快，粉尘浓度降低。矿石粒径越小，与空气相互作用的面积越大，粉尘浓度越大。增加矿石含水率可以降低粉尘浓度，使粉尘浓度保持在较低水平。此外，未经硬化的矿粉的水分含量为 4.17-8%。随着中间矿堆高度的增加，下落和撞击产生的粉尘减少，粉尘浓度降低。验证了安装密封盖的除尘效果。研究结果可为某中间矿堆的粉尘治理提供参考。