Comparison of microwave- and thermal-assisted rock fragmentation methods at different temperatures and loading rates
作者机构:State Key Laboratory of Hydraulic Engineering Intelligent Construction and OperationSchool of Civil EngineeringTianjin UniversityTianjin 300072China China Railway Design CorporationTianjin 300308China Institute of GeosafetySchool of Engineering and TechnologyChina University of GeosciencesBeijing 100083China
出 版 物:《International Journal of Mining Science and Technology》 (矿业科学技术学报(英文版))
年 卷 期:2024年第34卷第6期
页 面:799-819页
核心收录:
学科分类:08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学(可授工学、理学学位)]
基 金:supported by the National Natural Science Foundation of China(Nos.51879184 and 12172253)
主 题:Fangshan granite Dynamic experiments Microwave irradiation Thermal treatment Loading rate Fragmentation
摘 要:Understanding the effects of microwave irradiation and thermal treatment on the dynamic compression and fragmentation properties of rocks is essential to quantify energy consumption in rock *** this study,Fangshan granite(FG)specimens were exposed to microwave irradiation and heat *** damage of FG specimens induced by these two methods was compared using X-ray CT scanning and ultrasonic wave *** temperatures of FG after microwave irradiation and thermal treatment were effectively evaluated using a newly proposed technique.A novelty method for precisely determining the geometric features of fragments is developed to estimate the fragmentation ***,the dynamic uniaxial compressive strength(UCS),the dynamic fragmentation characteristics,and the fragmentation energy of FG after these two pretreatment methods can be reasonably *** noticeable distinction of loading rate effect on the dynamic UCS of FG between these two pretreatment methods is first observed.A relationship is established between the dynamic UCS and the damage induced by microwave irradiation and heat ***,fragmentation energy fan analysis is introduced to accurately compare the fragmentation properties of FG after two pretreatment methods in dynamic compression tests.