不同冲击比能下煤岩颗粒破碎的分形演化

为研究不同冲击比能对矿岩粒度分布的影响,根据分形理论建立了粒度分形维数与冲击比能的理论模型。利用落重试验机对无烟煤和矸石进行不同冲击比能下破碎试验,结果表明:冲击比能对无烟煤和矸石破碎粒度分布规律影响较小,G-S分布可以很好的表征不同冲击比能下无烟煤和矸石的累积分布规律;粒度分形维数随着冲击比能的增加呈对数增长。通过试验和其他学者的试验数据验证该理论模型的正确性。

Fractal Evolution of Particle Fragmentation of Ore and Rock under Different Impact Energy

In order to study the influence of different impact energy per mass on the size distribution of ore and rock, a theoretical model of fractal dimension of particle size and impact energy per mass was established based on fractal theory. The crushing tests of anthracite and gangue under different impact energy per mass were carried out with the drop weight impact tester. The results show that the impact energy per mass has little influence on the particle size distribution of anthracite and gangue, and the G-S distribution can well characterize the cumulative distribution of anthracite and gangue under different impact energy per mass. The fractal dimension of particle size increases logarithmically with the increase of impact energy per mass. The experimental results and published data verify the correctness of the theoretical model.