矿业科学学报2018，Vol.3Issue(3)：246-252,7.DOI:10.19606/j.cnki.jmst.2018.03.005
砂岩冲击岩爆实验碎屑研究
Study on sandstone fragments from impact rockburst experiments
摘要
Abstract
Impact rockburst is induced by the combined static and dynamic loads after excavation. There are two types of impact rockburst experiments, one is induced by changing the static load and another is induced by changing the amplitude of dynamic load. The sandstone fragments after these two experiments were collected. Meanwhile, the sandstone fragments generated from the similar compression experiment under static load were collected too. And the mass, length, width and thickness of each fragment has been measured respectively. The quantities and mass distribution of fragments with coarse, medium, fine and micro grains in different size ranges, and size distribution were further analyzed. The crushing level and shape characteristic of fragments were obtained. Then the fractal dimensions were calculated. The results show that the degree of crushing level of fragments from impact rockburst is higher and with obvious slice shape; the ways of combined static and dynamic loads have a little effect on the crushing level and scale characteristic of fragments from impact rockburst experiments; energy dissipation from impact rockburst experiments is higher than that of similar compression experiment.关键词
冲击岩爆/碎屑/尺度特征/破碎程度/分形维数Key words
impact rockburst/fragments/scale characteristic/crushing level/fractal dimension分类
矿业与冶金引用本文复制引用
刘冬桥,张晓云,何满潮,王炯,王炀..砂岩冲击岩爆实验碎屑研究[J].矿业科学学报,2018,3(3):246-252,7.基金项目
国家自然科学基金(51704298 （）
51404278) （）
北京市共建专项(80044810) （80044810）
中央高校基本科研业务费专项资金(2015QB01) （2015QB01）
