Abstract
It can facilitate the understanding of the mechanical properties and failure laws of rocks to research on the rock failure mechanism and evolution characteristics of Acoustic Emission (AE). Under the concentrated loading condition, the fracture and instability test of a rock plate was conducted by using the rock Mechanics Testing System (MTS), meanwhile, these AE events were recorded through the AE recording system. Based on the laboratory test, the numerical simulation was completed by using FLAC3D technique under the criterion that the rupture of a cell or several adjacent cells was regarded as an AE event. The results show that the process of the fracture and instability of the rock plate can be divided into four stages, such as the stress adjusting stage, the brittle fracture stage, the rock-arch bearing load stage and the rock-arch instability stage. And the acoustic emissions display the different characteristics in each one of the four stages. The temporal and spatial distribution characteristics of the AE events with large magnitudes are very similar to those of the natural earthquakes.
Highlights
S ince rock failure is always accompanied by Acoustic Emission (AE) phenomenon, it can facilitate the understanding of the mechanical properties and failure laws of rocks to research on the rock failure mechanism and evolution characteristics of acoustic emission
From the above mentioned results, we can see that the numerical simulation showed nearly the same AE characteristics with those of the laboratory test
Based on the laboratory test and simulation results, the process of the fracture and instability for the rock plate could be divided into four stages: the stress adjusting stage, the brittle fracture stage, the rock-arch bearing load stage, and the rock-arch instability stage
Summary
S ince rock failure is always accompanied by Acoustic Emission (AE) phenomenon, it can facilitate the understanding of the mechanical properties and failure laws of rocks to research on the rock failure mechanism and evolution characteristics of acoustic emission. Based on the locations of AE events, X.D. Zhao, et al found that the AE distribution could reflect the shape and development of the cracks in rocks, which is meaningful to study the deformation and failure laws of rocks [3]. Some scholars simulated AE by using Particle Flow Code (PFC) and Rock Failure Process Analysis system (RFPA), which provided a great help to understand AE phenomenon [12, 13]. Based on the laboratory test, a further research following the above mentioned results will be conducted by using FLAC3D technique under the criterion that the rupture of a cell or several adjacent cells was regarded as an AE event. We will analyze the temporal and spatial distribution characteristics of the AE events with large magnitudes and discuss the relationships between AE and natural earthquakes
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.
