Grid Based Analysis parameters
The Grid Based Analysis application can be used to evaluate the spatial distribution of various seismic parameters. 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 […]
Updates to Hazard Assessment app
A few new features have been added to the Hazard Assessment application, aiming to improve usability, understanding and investigation. The first addition is a chart in the hazard setup window to indicate the current date range settings. Usually the date range for calculating b-value will be a lot longer than for calculating event rate. Hopefully […]
Deswik survey support
The mXrap survey import tool now supports files saved in Deswik’s VDCL and DCF formats. There is also preliminary support for the Deswik Unified File format (DUF), but currently only for DUFv1. We recommend either VDCL or DCF as the most reliable formats for use with current versions of mXrap. If you’re currently exporting surveys […]
Mine Geometry Model – Minode Generator
Mine Geometry Model Minode Generator is a new utility app which enables you to generate your own new minodes from a mine geometry model. If you’re not sure what minodes are or why you would want to generate them, see What are minodes? If you’re not sure what mine geometry models are, see Mine Geometry […]
Plane based analysis
The Grid Based Analysis now has a plane based function. The user can select a plane (defined in the plane editor window) and display cumulative or average parameters on that plane. Like the grid, the average and cumulative parameters are calculated differently. For the average parameters, the plane points are treated identically to the grid […]
Analysing seismicity around large events
A new window has been added to analyse seismicity in the Large Event Analysis application. In a similar approach to the Short-term Response Analysis app, events are assigned to large events based on a spheroid volume and a time range before and after the large event. The chart below shows the energy index of seismicity […]
New hazard charts in General Analysis
Two new charts have been added to the General Analysis application related to assessing hazard with the frequency-magnitude relationship. The new charts plot various hazard parameters over time, or, by time of day: Charts / Time Series / Hazard over Time Charts / Diurnal / Diurnal Hazard The following parameters can be plotted […]
Background filters in the hazard app
The new background filters have been added to the Hazard Assessment application. The time of day filter can be used to see the effect of removing events during blasting/shift change on the hazard results. You can either view the results in raw or normalised form. The hazard calculations do normalisation for the event rate calcs […]
Stochastic declustering explained
As mentioned in the last blog post, a stochastic declustering algorithm has been implemented in mXrap to separate events into ‘clustered’ and ‘background’ components. It can be useful when designing seismic exclusions and re-entry procedures to separate seismicity that occurs in short bursts from seismicity that has low variability in space and time. Short-term exclusions […]
New background filters
We have added some new event filter options to general analysis related to ‘background’ activity. ‘Background’ events are generally defined as having low variability in space and time. The new background filters aim to identify events that are clustered in space and time and the user can either display the ‘clustered’ or the ‘background’ component […]