The huge array of information that can be drawn from a drilled borehole can be enormously helpful for planned expansion of mining either into new areas or expansions of existing sites. Wireline logging can identify the quality and quantity of potential economic resources, their accessibility and potential problems with their extraction.
Wireline logging can be used to identify, locate and correlate strata within an area using various physical characteristics either in isolation or in conjunction with core sample analysis. Wireline logging provides cost-effective, in-situ results on a continuous high-resolution vertical scale with true vertical depth.
Logging in mining
RG supplies a wide range of logging tools, beneficial to almost every aspect of mining explorations. An iron ore body could be identified by a density log and split into layers of magnetite and haematite using a magnetic susceptibility log. An evaporite could be indicated by its conductivity, identified by spectral gamma, density and neutron logs and have its extent and inclusions mapped by televiewers. Elsewhere, a low-strength strata with high permeability could be identified as at risk of collapse long before it poses a danger to mine workings and staff.
Lithology, and ore-body location
– Sidewall Density (use Density/Gamma in cased hole)
– Spectral Gamma
– Dual Induction/ Focused electric
– Gyroscopic Verticality (+3D magnetometer)
Rock Strength & Fractures
– High-resolution optical televiewer
– Acoustic televiewer
– Four-arm Dipmeter
– Micro-resistivity imager
– Temperature/ Conductivity
– Gyroscopic Verticality
– Borehole Geometry
– 3-arm Caliper
– Sonar Survey