矿业科学学报2025，Vol.10Issue(5)：785-796,12.DOI:10.19606/j.cnki.jmst.2025113
颗粒煤的破碎比功及其在压缩破碎过程中的能量转移特征研究
Research on the crushing specific work of particle coal and its energy transfer law during compression crushing process
摘要
Abstract
The crushing specific work of coal is an important parameter to characterize the energy de-mand for coal mass crush during outburst process.In order to study the energy transfer law and crush-ing specific energy of particle coal under compression experimental conditions,taking coal samples from five typical coal mines as the research objects,the single-particle coal compression experiments and PFC2D numerical simulations were carried out to study the energy distribution and dissipation during the crushing process.The distribution of crack propagation inclination angle were studied,and the relation-ship between the crushing specific work and the consistent coefficient of coal was studied as well.The results show that there is a certain linear increase relationship between the crushing specific work and the consistent coefficient of coal.The linear slope of the crushing specific work of 4 to 6 mm particle coal is greater than that of 6 to 8 mm particle coal,indicating that the crushing specific work of particle coal increases with decreasing particle size.During the same loading stage,the number of micro-cracks decreases as the particle size of coal increases.Micro-cracks will form in coal particles with diameters of 5 mm and 7 mm when the energy exceeds 1.58×10-6 J and 1.37×10-6 J,respectively.During the particle fragmentation process,the distribution of crack dip angles is concentrated within the range of 75° to 115°.In the failure stage,the dip angle of macro-cracks in coal particles decreases as the parti-cle diameter increases.This research will provide theoretical and experimental data support for predic-ting the risk of coal and gas outbursts using the crushing specific work of coal.关键词
煤与瓦斯突出/破碎比功/颗粒煤/坚固性系数/PFC2D数值模拟Key words
coal and gas outburst/crushing specific work/particle coal/consistent coefficient/PFC2D particle flow simulation分类
矿山工程引用本文复制引用
袁亮,涂庆毅,赵祖恒,薛生,黄嘉盛..颗粒煤的破碎比功及其在压缩破碎过程中的能量转移特征研究[J].矿业科学学报,2025,10(5):785-796,12.基金项目
安徽省高校科学研究优秀青年项目(2022AH030087) （2022AH030087）
国家重点研发计划(2023YFC3009001) （2023YFC3009001）
国家自然科学基金(52474203) （52474203）
