Effects of microwave radiation on dynamic compressive properties of basalt

微波辐射对玄武岩动态压缩性能的影响

The dynamic mechanical properties of basalt affected by microwave were investigated by performing dynamic compressive tests using the SHPB system.Meanwhile,the thermal damage of the treated basalt was characterized by ultrasonic non-destructive testing and nuclear magnetic resonance technology.The results show that with the increase of microwave power and exposure time,the P-wave velocity,dynamic compressive strength and elastic modulus decrease continuously,and the dynamic failure mode tends to be a more complex fracturing.The increase in microwave power and exposure time can enhance the temperature difference and transfer coefficient among minerals,hence intensifying the rock damage induced by thermal shock.

通过SHPB系统研究微波对玄武岩动态力学性能的影响,同时借助超声无损检测和核磁共振技术表征玄武岩热损伤情况。结果表明,随着微波功率和辐射时间的增加,P波波速、动态抗压强度和弹性模量不断降低,动态破坏模式趋于复杂。增大微波功率和辐射时间可提高矿物间的温差和传热系数,进而加剧热冲击对岩石造成的损伤。