Instrumentation
Convergence
Convergence app
The main focus of the app is to create a 3D (effectively 2D) plot of convergence pin readings. This is achieved through surface contours of interpolated values from the pin reading locations.
Extensometers
Extensometer General
The app provides the tools import and evaluate various formats of extensometer data. Data is assessed over the life of the instrument and for a period of interest. Displacement is expressed as a cumulative value over the instrument length and per node values. Instruments are plotted in 3D with markers displaying displacement measurement along with nearby seismic events and blasts. Cumulative and Per node displacement values are charted over time and summarised in tables.
Extensometer Data import
Import data for use in the extensometer app.
Prisms
Prism app Overview
The Prism Monitoring app provides the tools to import and evaluate prism data which is routine used to monitor ground movements, for example, slopes in open pits or subsidence zones associated with caving. Prism data is assessed as displacement and rates in 3D, 2D, and X, Y and Z directions. Displacement and rate data is plotted in 3D as a vector and interpolated values on survey surfaces, charted over time, and summarised in tables. Data from period of interest can be selected for individual, multiple, or predefined zones of prisms. Additional analysis options include piecewise linear fitting to assess rates of deformation (Figure 3), persistent quality tags for excluding erroneous data, and plotting of rockfall data with respect to surveys and prism results.
Prism app Import and quality
Import data in the correct format and assess the quality of data using selections to set a quality tag for to exclude in interpretation & calculations.
Prism app Velocity and Deformation
Use selections on data in which you choose to fit a line to and store it as a linear fit for use in mXrap for user defined periods of rate fitting.
Stress Cells
Stress cell app
Continual monitoring of in-situ stress are done by installing stress measurement devices like the CSIRO stress cell, and monitoring the measured changes over time. This app receives the strain measurement recorded by the stress measurement device and invert for the in-situ stress state. This allows for the analysis of changes in stress magnitude and orientation over time.
Authors
Principal author: Kyle Woodward
Contributing author: Paul Harris
Woodward, KR 2017, mXrap software, Instrumentation module, Australian Centre for Geomechanics, Perth, mxrap.com