崩落法松散覆盖岩层自然分级对矿石损失贫化的影响

Effect of the Natural Grade Classification of Loose-covered Rock with Caving on Ore Loss and Dilution

松散覆盖岩层的自然分级现象对使用崩落法开采的矿山开采效果有较明显的影响。为填补这方面研究的空白,开展了实验室模型试验研究。试验研究结果证实了自然分级现象是松散覆盖岩层客观存在的性质之一。矿岩粒度分布不同,对损失贫化的影响也不同。这项研究为降低损失贫化提供了新的途径。

The natural grade classification of loose-covered rock has a great effect on caving mining efficiency.To fill the research gaps in this field,laboratory model tests were carried out.Test results confirmed that the classification phenomenon of natural grade was one of properties to determine where loose-covered rocks exist.Different distribution of particle size leads to different impact of loss and dilution.The study provides a new method for reducing the loss and dilution of ore.