mXrap News and Events

Upcoming Events
updates to large event analysis
23
Sep
mXrap User Case Studies for Mines Seminar

 

This event is designed to allow mXrap users to share (through presented case studies) their experience of using mXrap and the problems they have been able to address using the software package.  

 

Montreal, QC, Canada
Online
23 September 2024
08:00 - 12:00 EDT
Deep Mining Logo Square
24-26
Sep
Deep Mining 2024

 

Deep Mining 2024 is an international conference which provides a forum for industry and academia to come together and share research, experience and knowledge on best practice in the area of deep and high stress underground mining.

 

Montreal, QC, Canada
24-26 September 2024
All Day
Underground_small for web
5-9
May
Geotechnical Design for Underground Metalliferous Mines Course

This course is designed to develop specific underground metalliferous mining geomechanics design competencies for engineers to enhance their contribution to mine site geomechanics programs.

 

Perth, WA
Online
5-9 May 2025
08:30 - 12:30 AWST

mXrap blog

video creation
Video creation
mXrap now has a video creation panel! To create your videos, simply open the ‘video export’ panel. You can then choose whether you want to take a video of just the General Analysis 3D view, or of any other tool in General Analysis. To make a video of the General Analysis 3D view, you just need to choose where to save the video, give it a name and a frames per second (FPS). Then you choose the time slice settings (start, slice width and number of slices). You can also make these slices...
moment tensors
Moment tensors – a practical guide
Moment tensor analysis is a topic that carries a decent level of uncertainty and confusion for many people. So I’m going to lay it out as simply as I can. For this post, I’m not going to go into too many details on how moment tensors are actually calculated. But, I’m going to summarise the things I think are most important for geotechnical engineers to know for interpreting moment tensor results. OK, so, what is a moment tensor? A moment tensor is a representation of the source of a seismic event....
new b-value isosurfaces
New b-value isosurfaces
The isosurfaces for b-value have been upgraded in the latest root. There is now much more control over the isosurface levels. Up to 5 iso’s can be plotted for user defined ranges. A linguistic name can be assigned to each level and displayed in the legend. A new video has been uploaded to the Hazard Assessment page that explains the new b-value isosurfaces.
moment tensors GA
Moment tensors in General Analysis app
Moment tensors have been added to the General Analysis application in the recent update. Beach balls and principal axes can be viewed in the General Analysis 3D view. There is also a separate Moment Tensor window with a number of stereonets and mechanism charts. Two new training videos have been uploaded to the General Analysis (3D View) page that walkthrough the new tools. IMS and ESG sites should have moment tensors loaded in with the events table automatically.
generic mxrap
Survey format converter
A simple utility app has been added to the main root that can be used to export surveys loaded in mXrap. Possible reasons to use this app include: Switch between file formats Export a decimated survey Export a survey with translated or swapped coordinates Combine multiple surveys into a single file Currently supported export formats are: DXF DTM / STR PNT You can watch this training video for the Survey Format Converter.
seismic activity rate monitor
Seismic activity rate monitor
The seismic monitoring applications have been modified in the latest root update. There are now two seismic monitoring applications and a third app for setup. The two different monitoring apps are required because not all sites wanted to use exclusion procedures. The monitoring app with exclusions has a different user interface structure and a few extra features. A new window has been added to monitor activity rate so that both monitoring apps have windows to monitor events and to monitor activity...
sort term response analysis application
Short-term response analysis application
Another new app has been added to the Seismic Suite for the general analysis of short-term seismic responses. There are multiple features to analyse the short-term response to different triggers (events or blasts) in time and space. In later versions, this app will replace all of the tools in the previous ‘Omori Analysis Tools’ app but version 1 currently only replaces the old ‘response to blasting’ window. There are two main aspects of the app, the simple response viewer...
mine geomoetry models application
Mine Geometry Models application
The root upgrade that coincides with the software upgrade beyond v5.9 includes a new app for creating and exporting models of mine geometry. Stope, cave and development geometry is a fundamental aspect of most geotechnical analysis. Mine geometry also varies over time and capturing these changes is critical in any back analysis or numerical modelling that investigates stability or monitoring parameters over time. This is a utility app to create models of mine geometry that can be exported to facilitate...
mxrap interface upgrade
mXrap interface upgrade
We have started rolling out a new version of the mXrap software and root folder. Software versions 5.9 and above include a few interface changes. The new version is available on the download site but DO NOT download it until someone from the mXrap team has upgraded your root folder. Several root folder changes need to be made simultaneously with the software upgrade. We will be in touch soon to arrange the upgrade (if we haven’t already). Interface changes From now on, when you open an app, all available...
survey decimation
Survey decimation
Are your surveys really slow to load? Are you having difficulty rotating your 3D view? The problem might be the level of detail in your survey files. If the level of detail of survey files is unnecessarily high, it will slow down the 3D view for no reason. This is often the case with stope CMS files. To reduce the level of unnecessary detail in your survey files: Open the survey setup window (can be found in the General Analysis app) and select the surveys you’re interested in (on the left)....
survey input configuration
Survey input configuration
Are you unable to see your surveys, but can’t work out why? Are some of your surveys located a long way away from the rest of your mine when they shouldn’t be? This could be due to the input configuration of your survey files. The order of the co-ordinate components (Easting, Northing, RL) are sometimes different for some survey formats, so we have to ‘flip’ the X and Y co-ordinates. This is often the case for DTM files. To fix this: Open the survey setup window (can be found in the General Analysis...
hazard assessment app excavation view
Hazard Assessment app – excavation view
The grid-based hazard calculations in the Hazard Assessment app were discussed in a previous post. The Iso View describes the hazard at all locations within the mine but when you are considering the seismic risk for a particular work area, large events and strong ground motions may come from multiple sources. The Excavation View estimates the seismic hazard associated with working areas (minode locations) in a few different ways as described below.   P [ ML within R ] The P [ML within...
strong ground motion relationship
Strong ground motion relationship
The strong ground motion (SGM) relationship is used to calculate the peak particle velocity (PPV) generated by a seismic event. You may also hear this referred to as a ground motion prediction equation (GMPE), but only the maximum velocity is estimated, i.e. the strong ground motion, rather than the full, complex wave motion. The PPV is generally calculated for a specific location based on: •  distance to the seismic event (R) •  source magnitude (ML) •  source radius (Rs) •  static stress drop (SSD) The...
damage mapping application
Damage Mapping application
As part of the ACG’s Ground Support Guidelines for Rockburst Prone Conditions research project, we have developed an application for damage mapping. It is a web-based application design for use with a tablet. This allows users to do their damage mapping offline while underground on the tablet, then when the tablet is connected to the network, the information is synced with our server and pulled into mXrap (making it a single pass process). Each damage mapping instance is stored as a separate report....
what do the hazard isos means
What do the hazard iso’s mean?
The Iso View in the Hazard Assessment application expresses the seismic hazard in two ways. The current yearly hazard within the chosen grid volume. This is shown in the footer of the 3D view, as the probability of an event exceeding the design magnitude. The spatial distribution of the hazard. This is highlighted by the hazard isosurfaces. In the case below, the design magnitude is set as ML2. The corresponding hazard isosurfaces for ML2 can be interpreted as the most likely location for that...
generic mxrap
What are minodes?
Minodes are what we use in multiple places in mXrap if we want to assign information to development. They are just point locations, dotted along your development, in roughly 5m intervals. Things like ground support and PPV hazard are really only relevant for development locations, so minodes are our way of denoting these places. Minodes are also used to calculate the span of the excavation at that point. The tunnel length is also used in the Hazard Assessment app. Minodes are not generated automatically...
seismic source parameters quick guide
Seismic source parameters – quick guide
As mentioned in the last blog post, energy and moment are independently calculated based on the displacement and velocity spectra of the recorded waveforms. Another spectral parameter is the corner frequency. The figure on the left shows the corner frequency (f0) on theoretical displacement, velocity and acceleration spectra. The calculation of corner frequency relies on fitting a reliable source model to the observed spectra. Many commonly used source parameters are derived from Energy, Moment and...
seismic energy and movement
Seismic energy and moment
You know that energy and moment are parameters to describe seismic events. But what exactly is their physical meaning for a seismic event source and how are they calculated? Moment and energy are both separate (but related) measures of the strength of a seismic event. A similar example is a car engine, the performance is described with two separate (but related) measures: power (hp or kW) and torque (Nm). In a simplified piston and crankshaft arrangement, the torque is the twisting force exerted...
generic mxrap
Download a root in mXsync
Did you know you can download root folders from mXsync? We have uploaded root folders for Tasmania and Big Bell mines. These sites have closed and the data has been made available for research. Have a look at the ‘Download a component‘ training video for a guide to downloading these roots onto your computer. The data can be handy for research projects or just for curiosity’s sake. You may even want to download the Xgames root…. for work purposes of course.
track seismic hazard over time
Track seismic hazard over Time (per volume)
We have added some new features to the Hazard Assessment app to calculate the minode hazard for filter volumes. This works just like the current minode calculations, where you can select minodes and compute the probability, P, of exceeding your design magnitude, within R of any selected minodes. The volume hazard refers to the seismic hazard for minodes within the filter volume. The same backdate, backrange, Mdesign and R parameters apply as the existing tools. Another tool has been added to track...
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