Acoustic emission characteristics of gabbro after microwave heating

In recent years, microwave mechanical rock breaking—an energy-saving technology with environmental benefits and high efficiency—is increasingly being used to improve the rock-breaking efficiency of geothermal well drilling. Herein, we studied the evolution of different types of cracks in gabbro under uniaxial loading using the acoustic emission (AE) technique. The results show that, after microwave heating, the number of microcracks in gabbro...