Grid-based Analysis
The Grid-based Analysis application is used to evaluate the spatial distribution of various seismic source parameters. A specified volume or plane is discretised into uniformly spaced grid points. A representative value of various seismic parameters is assigned to each grid point based on nearby events.
There are a range of source parameter options available, and they can give indications to the rock mass behaviour. Some parameters can be considered as a proxy (stand-in) for rock mass stress, while other parameters can be a proxy for the amount of deformation. There are also parameters available that are associated with the rock mass mechanism or event type.
Key Features
Spatial representation
- Visualise how seismic source parameters vary throughout the mine, highlighting zones of elevated stress, increased deformation, or different seismic behaviours.
Mechanism interpretation
- Identify dominant seismic event types and source mechanisms in different areas of the mine, supporting structural interpretation and geotechnical decision-making.
- Differentiate between blast-induced seismicity and seismicity associated with structural slip.
Stress and deformation proxies
- Utilize source parameters that act as practical proxies for rock mass stress state and deformation.
Short-term and long-term comparison
- Compare seismic response over different time periods to track changes in seismicity and evolving rock mass conditions.
Grid point investigation
- Improve confidence in results through grid-level data quality and b-value assessment.
- Evaluate event density and reliability at each grid point to identify areas where interpretations are robust and areas where caution is required.