摘要
对花岗岩和黄砂岩做落锤冲击试验,研究微波照射后岩石抗冲击性能的下降规律,分析在一定时间、不同功率作用下,岩石抗冲击性能的降低机理。研究结果表明:微波照射时间一定时,岩石抗冲击性能随微波照射功率的增大而逐渐降低,降低速度先变快后变慢;花岗岩和黄砂岩分别在微波照射功率为8 k W和4 k W时抗冲击性能下降最快。微波照射引起不同岩石抗冲击性能降低的原因,在于不同矿物组成的膨胀变形不同,致使微裂纹扩展至岩石破碎,抗冲击性能丧失。
Based on drop impact test of granite and yellow sandstone,the decline law of rock impact resistance after microwave irradiation was studied. The relations between tha rock impact resistance and microwave power level under the same irradition time were analyzed. The experimental results show that the bigger the microwave power is,the more the rock impact resistance reduces under the equal microwave irradiation time,and the speed of impact resistance degradation is fast at first and slow down later. The greatest drop in rock impact resistance of granite and yellow sandstone is 8 k W and 4 k W respectively. The reason for reduce of different rock impact resistance by microwave irradiation is the different expansion deformation of the different mineral composition,which results in micro crack expansion to rock crushing and loss of shock resistance.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2016年第1期64-67,8,共4页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(51174159)
关键词
微波照射
岩石
落锤冲击
抗冲击性能
microwave irradiation
rock
drop impact
impact resistance
