UNDERGROUND MINING & TUNNELLING SERVICES

A strong understanding of the site conditions is considered fundamental to all our underground projects. BGC is used to working on multi-disciplinary projects and designing site investigation programs that maximize acquisition of resources as well as geomechanical and hydrogeological data. Our expertise includes planning and design of comprehensive field investigation programs including geotechnical and oriented core logging, borehole televiewer surveys and core orientation, hydrogeological testing, core sample selection, coordination of laboratory testing and interpretation of results. These data are used to develop geomechanical, structural and hydrogeological models that form the basis for design. On ground monitoring and instrumentation, BGC’s team has extensive experience with planning, design and installation of piezometers, monitoring wells, inclinometers, extensometers, TDR cables, shape array accelerometers and Smart Markers®. BGC also has experience with evaluation of in‐situ stresses by back‐analysis of underground observations.

BGC’s geotechnical and hydrogeological models are used to develop advanced 2D and 3D models to assess the stability and prepare fit-for-purpose underground opening and ground support designs involving tunnels, shafts, stopes, ramps and declines. We specialize in the design of pillars, crown pillars, portals and have experience with the design of bulkheads and plugs. Our team also provides expert advice on excavation, mining sequence, and mining method evaluations.

BGC’s underground mine operations experience includes review of ground monitoring data, instability assessments and development of mitigation measures, as well as development, implementation and audit of ground control management plans, evaluation of excavations interaction and influence on design, evaluation of surface subsidence due to historic or active mining and tunnelling, design and installation of ground monitoring and instrumentation systems, geotechnical audits and risk assessments. We also provide backfill and closure designs for portals, shafts, and audits, and we offer Engineer of Record services and provide construction monitoring and records.