Rock Engineering

The OHMS’s experience base, capabilities and services are wide ranging in various geotechnical environments, ore bodies, mining methods (open cast, narrow tabular, massive mining, board and pillar) and mining depths (shallow, intermediate, deep and ultradeep).

Since inception, we have been involved in geotechnical projects on the African continent, Pacific, Middle East and Eastern Europe. In addition to the services on projects, we also provide related services by placing suitably qualified and experienced professionals on the mine site as per contractual agreement over an extended period of time.

The OHMS team integrate with the client’s team on mine sites or lead consultant’s team on projects. However, we also provide input as independent consultants when required.

Rock Engineering Services

For more detail about each service or product offering, please read the following:

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Rock Engineering capabilities and experience

  • Detailed gathering of Geotechnical data
  • Definition of Geotechnical Environments
  • Field and Laboratory Testing of rock samples
  • Definition of Design Parameters and criteria.
  • Definition of Design Guidelines
  • Design of Pit Slopes
  • Design of Underground layouts and sequences.
  • Liase with Professional project teams
  • Scoping and Desktop studies
  • Pre-feasibility and Bankable feasibility studies
  • Reviews of specific designs
  • Expert opinions regarding designs
  • Second opinions on designs
  • Failure and back analysis
  • Investigate System and Design failures
  • Risk Assessment
  • Geotechnical monitoring programs and instrumentation.
  • Deal with Government inquiries and inquests.
  • Advise Management regarding the up-liftment of mine stoppage instructions.
  • Seismological analysis for mines (data processing, analysis, risk assessment, early warnings, back analysis, routine reporting)
  • Developement of analysis software for numerical modelling, seismological data analysis and reporting.
  • Installation, maintainance and monitoring of geotechnical instrumentation and seismic systems.
  • Routine modelling (on- and off-reef)
  • Life-of-mine/Business plan analysis based on site specifically established design criteria
  • Research in new and/or hybrid mining methods and re-enforcement
  • Backfill design
  • Loading system stiffness and ground reaction curves.
  • Secondary extraction
  • Stress around excavations
  • Shaft pillar design and anticipated pillar behaviour
  • Longwall stability and Scattered Mining simulations
  • Massive mining related analysis
  • Rock reinforcement
  • Mine waste rock dumps and mine tailings stability
  • Embankment, portal and decline design.
  • Geotechnical drilling programme and borehole layout
  • Geotechnical design on all levels of accuracy in project studies.
  • Slope stability and design
  • Rigid Body Fall analysis (on open pit slopes and embankments)
  • Kinematic analysis of failure modes associated with discontinuities in open pit slopes.
  • Joint behaviour
  • Water migration and the influence of water on slope stability
  • Cavability studies
  • Subsidence studies
  • Multi-seam mining
  • Tunnel stability and squeezing
  • Business Plan Risk assessment using Probabilistic Methods
  • Remnant Modelling
  • Geological Structure stability and seismic potency simulation.
  • Seismic back analysis and hazard assessment
  • Quantification of probability of failure through Monte-Carlo analysis
  • Point Estimate method and the Area of overlap method
  • Support design incorporating probabilistic keyblock methods.
  • Geological services (field exploration, core logging, ore body modelling and resource delineation)