When applying modern mining methods in subsurface engineering – but in strip mining, as well – the petrophysical properties are of great importance. This is true above all for tunnelling and heading work, when drifting tunnels in coal, ore or neighbouring rock, and when dealing with questions of long-term stability. We carry out geotechnical investigations of the rock, enabling a comprehensive assessment of the rock formations in preparation for mining activities.

Such assessments are useful, for instance, when planning tunnels and headings and for optimising the dimensions of anchors. The amount of deformation encountered when repairing and restoring headings can also be systematically recorded. Sectility testing makes it possible to modify in a timely fashion the use of heading machines so as to suit prevailing geomechanical conditions.

Typical geotechnical examinations that we carry out in civil engineering, tunnelling and surface mining include:

• Rock face recording
• Core data acquisition
• Digitalisation of geotechnical rock properties
• Visualisation of geotechnical rock properties
• Sectility testing

The latest product designed to optimise examinations associated with anchoring work is our DMT SlimBoreholeScanner (SBS). This is an optical tool for identifying joint planes, fracture widths, the mineral components and distribution of grain size in anchor boreholes. The success of injection work can also be measured and documented with this tool.