Rock Mass Data

RMDA app: new geotechnical domains delimiter app and more!

A new app has appeared in the Rock Mass Data Analyser suite: the Geotechnical Domains Delimiter. This app allows you to create your own geotechnical domains; either from boundaries (e.g. lithological contacts or fault planes) or volumes (e.g. lithologies, domains, selection boxes). The app uses the HW/FW filter to classify the space in relation to each survey imported (inside a survey = ‘ore’; hanging wall = hang; footwall = foot). Each unique fingerprint combination is represented by a point (see pink dots in Figure 2). To identify key areas, these points need to be assigned as a ‘reference point’ by giving it a name (Figure 2). Afterwards, geotechnical domains names can be assigned to the defined reference points (Figure 3). A single geotechnical domain may have multiple fingerprints, thus it needs to be defined by more than one reference point. In this example, most of the geotechnical domains were associated with two fingerprints each. The geotechnical domains created automatically classify all the data in the Rock Mass Data Analyser: the rock mass quality data (e.g. RQD, G, RMR, GSI), the structures, the geology observed in borehole segments, stress measurements etc. Figure 4 shows the lab tests, the rock mass quality intervals along boreholes and stress measurements in Region2 with ticks in the Filter panel. For more information, view the five training videos detailing the Geotechnical Domains Delimiter app. Borehole ID: more flexibility to show text in 3D For all borehole sources, you now have the ability to show the borehole ID along the dip of the hole and at the top or bottom. To do so, the controls of the text series related to the borehole IDs must be adjusted (see Figure 5). If more than 1,000 boreholes need to be displayed, do not forget to increase the ‘Max # to plot’ field! Detailed data errors There is now a detailed error panel of the data imported and saved for all data sources (rock mass quality, structures, lab tests etc.). These panels detail the boreholes or sample for which the data is outside the expected range, the concerned parameter, and its value. A table summarising all the rows containing ‘bad quality data’ is available in Rock Mass Data Analyser. The values outside expected ranges are clearly highlighted in red. The segments containing ‘bad quality’ data can also be seen in 3D space (Figure 6). The ‘good data’ table only shows the data used for calculations; if a sample/borehole interval contained a ‘bad value’ for a parameter, only that parameter is ignored in the calculations, not the entire data for the segment/sample. Rock mass quality data: using RQD from another source New features in the Rock Mass Data Importer/Analyser allow you to import RQD values with intervals other than the one defined with your rock mass quality data csv. The first step is to import the csv containing the RQD data along the borehole, in the following column order: Borehole ID, From, To, RQD value (see Figure 7). Afterwards, the newly imported RQD values can be seen alongside the RQD values from your rock mass quality data imported, if it exists. You can choose which RQD values to use for the further analysis (Tables, Charts & 3D View) in ‘Select RQD sources’ (see Figure 8). The same panel can be found in both the Rock Mass Data Importer app and the Rock Mass Data Analyser app. Do not hesitate to contact the mXrap support team for an app upgrade to get all these features!

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Rock Mass Data Analyser updates

The Rock Mass Data Analyser (RMDA) application allows a user to import various types of geotechnical data (rock mass quality, structural, stress and intact rock strength) into mXrap, creating a geotechnical database which may be visualised and analysed in 3D, on charts and in stereonets (see previous blog post for more details). Since the release of the RMDA, various updates have been made to assist with data analysis and setting up the rock mass database. Interface: The application is now split into two apps: the Rock Mass Data Importer and the Rock Mass Data Analyser. This has been done to streamline the data import process and allow users to focus on data analysis in the analyser application. Geology: Geology logs may now be imported into the application. These logs can be used to update other borehole databases (e.g. geotechnical logs, structural logs, etc.) with lithology data. Lithology groups may also be created, allowing for the grouping of lithologies from geology logs into broader groups that are more suited for geotechnical purposes. Structures:  A digital mapping data section has been introduced, where structural data from photogrammetry and LiDAR scans may be imported. This data may be combined with structural data from boreholes and scanline mapping, contributing to the structural database. True spacing statistics for each defined discontinuity set has been added (note that discontinuity sets may be outlined in the application). Users can now visualise and correct for orientation and sampling biases. Alpha and beta values imported from structural logs can now be converted to dip and dip direction, where the user is required only to provide details on how the beta angle was measured. A core stick illustration is also provided to assist with choosing a beta measurement option. borehole structures where dip and dip directions have been calculated from alpha and beta values Stress: A section to visualise and assess stress data has been added to the application. Borehole stress measurements and borehole breakout observations can now be imported, allowing for the creation of a stress database which can be updated as required. Tools in this section allow a user to: Visualise stress data along boreholes. Visualise the orientation of principal stresses. Analyse stress orientations with respect to depth below the surface. Calculate the Euclidean mean of the stress measurements. Produce a summary report. stress data window Other updates: Various new filters and markerstyles have been added. This includes a structure type filter for structural data and a failure type filter for intact rock strength data. VSA Filters have been added for all data sources. This allows the filtering of data based on a given user defined volume. Intact rock strength window with “failure type” filter applied to data in the Hoek-Brown chart and 3D view VSA filter applied to rock mass quality data Future plans for the RMDA application include the development of tools to define and edit geotechnical domains interactively. There are also plans to continue to integrate the RMDA into other mXrap applications. For more information or if you would like to try the RMDA application, please contact our support email address 

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Rock Mass Data Analyser

The Rock Mass Data Analyser (RMDA) application allows a user the ability to input various types of geotechnical data into mXrap, creating a geotechnical database of borehole and mapping data, which may be easily visualised and analysed in 3D, on charts and in stereonets. Thus far, the application has been developed to allow for the visualisation and assessment of: Rock mass quality data e.g. RQD, RMR, Q, Q’, GSI etc. Structural data i.e. joint orientations and joint conditions from scanline mapping and logging data Laboratory test results e.g. UCS, TCS, and BTS Once data has been imported there are multiple filter options available for borehole IDs, lithologies, data sources, joint sets and rock strength test types. Pre-set legends for all geotechnical data is also provided within the app as well as the ability to select and filter data based on 3D locations.                                                               Q values plotted along boreholes Histograms and CDF curves of rock mass quality data are also available for the various lithologies and boreholes in the database. These lithologies may be combined or plotted separately. The ability to select data based on 3D location also provides the user the opportunity to create histograms for a specific geotechnical domain or area of interest.    Histogram and CDF curve of Q values for a combination of lithologies  Histogram and CDF curves of Q values for two lithologies plotted separately Both scanline mapping data and borehole structural logs can be imported and viewed in 3D and on stereonets. Once structural data is imported, the user has the option to assign discontinuity sets on stereonets. As sets are assigned or as filters are applied, real time updates to discontinuity set statistics are also provided. Structures plotted along boreholes based on discontinuity set  Poles plotted on stereonet based on discontinuity set  For intact strength laboratory test results, along with visualisation of the test result locations along boreholes, Hoek-Brown failure envelopes can also be produced for specific lithologies, a group of data or for specific boreholes.                                                         Hoek-Brown curves based on UCS, TCS and BTS test results The RMDA is also integrated with mXrap’s Discrete Fracture Network (DFN) generation app and our data collection web app (which allows for efficient scanline mapping with the use of a tablet). Currents plans for the RMDA include the development of a window mapping section and integration with mXrap’s seismic suite, allowing a user to view their rock mass quality and structural data along with their seismic events. The RMDA will also act a feeder app into the stope reconciliation and geotechnical block model applications, which are currently under development. For more information or if you would like to try the RMDA application, please contact our support email.

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