露天排土场粒度分布特征及其组合模式

Distribution Characteristics of Particle Size in Open-pit Waste Dump and its Combination Models

露天排土场中废石堆岩石粒度分布特征是影响排土场稳定性的重要因素。对借鉴了爆堆岩块块度分布研究方法,运用mapgis地质制图软件对废石堆图像进行处理,对所得相关数据通过频率分布函数曲线进行分析。研究表明,自然堆积的废石堆中岩石粒度分布存在一个分界粒度,大于或小于分界粒度的岩石所占比例随废石堆高度的增加而减少或增多。根据粒度频率分布曲线可将废石堆分成不同的组合模式,每个组合模式具有不同级配。

The particle size distribution of waste pile in open-pit waste dump is an important factor to influence the stability ot waste dump. Based on the block distribution method of blasting rock, the image of waste pile was processed by mapgis geological mapping software, and the related data was analyzed through the frequency distribution function curve. The research showed that the particle size distribution of rock in naturally packing waste pile existed a dividing particle size, and the proportion of rock with the particle size larger or smaller than the dividing particle size would respectively decreased or increased with increasing the height of waste pile. According to the size frequency distribution curves, the waste pile could be divided into dif- ferent combination models, with different gradations.