Abstract
The estimation of rockburst potential has attracted great attention in the field of rock mechanics and engineering. In this study, an original energy preservation index is proposed to evaluate the rockburst potential in view of the energy evolution characteristics of rock materials. To investigate the energy evolution during rock deformation and failure, a number of cyclic uniaxial compression experiments on five kinds of rocks were carried out. The results showed that the curves of energy evolution exhibited obvious stages and there were significantly different weakening degrees for different rock materials embodied by the decreasing degrees of the ratios of elastic strain energy to dissipated strain energy at the weakening stage. Then, the energy preservation index was further formulated based on the decreasing ratio. Furthermore, by analyzing the acoustic emission activities at the failure stage and failure modes of the five rock materials, the rockburst potential was analyzed according to the energy preservation index.
Highlights
IntroductionDuring the exploitation of mineral resources, rockbursts may lead to secondary hazards such as gas outbursts and dust explosions [1]
Rockburst poses severe risks to the safety of underground excavations
From the perspective of strain energy, studies on the rock deformation and failure can more accurately reveal the nature of the rock failure
Summary
During the exploitation of mineral resources, rockbursts may lead to secondary hazards such as gas outbursts and dust explosions [1]. With the growing intensity and mining depth in resource exploitation, cases of rockburst hazards have been increasing in recent years [2,3]. Rockburst mechanisms have been explicated from the viewpoints of rock strength, stress–strain curves, and mineral compositions [4,5,6,7]. There are still no widely accepted rockburst potential indices in rock mechanics. The entire process of rock deformation is always accompanied by the energy conversion. From the perspective of strain energy, studies on the rock deformation and failure can more accurately reveal the nature of the rock failure
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
