爆破2025，Vol.42Issue(3)：1-8,105,9.DOI:10.3963/j.issn.1001-487X.2025.03.001
微波作用下铁矿石力学性能劣化及能量演化规律研究
Research on Mechanical Property Deterioration and Energy Evolution Mechanisms of Iron Ore under Microwave Irradiation
摘要
Abstract
To systematically reveal the influence of laws of microwave radiation parameters(power,time)on the degradation of the mechanical properties of iron ore and the energy dissipation mechanism,and to improve the crush-ing efficiency of iron ore,this iron ore from Sishanling in Liaoning Province is the research object.By adopting a method combining microwave pretreatment,multi-scale mechanical tests,and microscopic tests,this thesis conducts static and dynamic impact tests as well as XRD tests on iron ore samples under different microwave actions.By analy-zing the mechanical properties of iron ore subjected to various micro wave treatments and utilizing the principles of energy conservation,this study elucidates the damage evolution characteristics and the laws governing energy evolu-tion of iron ore under the coupled action of micro wave and mechanical forces.The research results show that:(1)With an increase in micro wave power and irradiation time,the sample mass decreases slightly,and the longitudi-nal wave velocity,uniaxial compressive strength,and elastic modulus exhibit a linear degradation trend.Microscopic tests have confirmed that the damage is caused by thermal stress cracking,rather than a change in composition.(2)The analysis of energy evolution indicates that microwave pretreatment diminishes the total input energy density of the sample,reduces the proportion of elastic energy,and elevates the proportion of dissipated energy.This phenomenon suggests a deterioration in the ore's storage capacity and a transition toward plastic yielding.(3)Dynamic impact tests show that an increase in microwave damage leads to a 45.58％increase in reflected energy,a 16.12％decrease in transmitted energy,and an increase in energy dissipation to 37.49％.关键词
微波辐射/铁矿石/力学特性/能量演化/矿石损伤Key words
microwave radiation/ironstone/mechanical properties/energy evolution/ore damage分类
矿业与冶金引用本文复制引用
杨小林,张少兵,褚怀保,郭德坤,温自龙,鲁一明,崔莱州,程志楷,孙博..微波作用下铁矿石力学性能劣化及能量演化规律研究[J].爆破,2025,42(3):1-8,105,9.基金项目
国家自然科学基金重点项目(No.52130403) （No.52130403）
国家重点研发计划项目(No.2023YFC2907202) National Natural Science Foundation of China(No.52130403),National Key Research and Development Program of China(No.2023YFC2907202) （No.2023YFC2907202）
