摘要
为探究微波照射条件下含水率的变化对岩石强度以及破坏特征的影响规律,分析微波辐射下岩样内部裂纹扩展演化过程,根据岩样在水中浸泡时间的差异,将加工好的玄武岩岩样分成4组,用微波辐射岩样,随后进行CT扫描和抗剪强度试验。结果表明,在设计的含水率变化范围内,岩样在微波辐射下,吸波矿物所在的区域产生损伤,且损伤程度与含水率成正比,并表现出局部化特征;随着含水率的增长,岩样的抗剪强度呈下降趋势,最后的破坏形态为岩样剪切面邻近区域裂纹变多,岩样整体破碎加剧。
In order to investigate the influences of different moisture content on the failure characteristics and strength of rock under microwave irradiation, the evolution process of rock internal crack propagation under microwave irradiation is analyzed. The basalt specimens are divided into 4 groups according to different immersion time. Firstly, the microwave irradiation is carried out, and then the CT scanning test and shear strength test are conducted. The results show that, （a） the rock areas contained wave-absorbing materials are damaged under microwave irradiation, and the damage degree is proportional to water content and shows a localized characteristics when in the variation range of designed water content; and （b） with the increase of water content, the shear strength of rock is decreased, and the failure characteristic is that the crack increases near the shear surface of specimen, and after shear failure, the whole rock fracture is aggravated.
出处
《水力发电》
北大核心
2018年第1期31-34,共4页
Water Power
基金
国家自然科学基金资助项目(51174159)
关键词
岩石力学试验
抗剪强度
微波照射
CT扫描
rock mechanical test
shear strength
microwave irradiation
CT scanning
