TechSpan precast concrete arches are the ideal solution for the construction of precast segmental tunnels throughout mining sites. TechSpan has the capacity to withstand loads from the highest mineral stockpiles and the heaviest mine plant activity. Our TechSpan solution is commonly used to build:

• Reclaim conveyor tunnels
• Rail and vehicle tunnels
• Short-span bridges
• Shaft portals
• Rockfall sheds
• Utility vaults and pipeline cover

Our solutions for storing and reclaiming ore, minerals, coal, and other mined materials typically consist of inclined Reinforced Earth walls, built linear or octagonal in plan. Most of these structures are built inverted, below ground, although may be set above ground. These walls are built with facings set at a calculated incline for drawdown. These slope-faced walls are referred to as “V-slots” or bunkers. Reinforced Earth slots have now been constructed on four continents with storage capacities ranging from 2,000 tonnes to 150,000 tonnes each, with depths reaching above 25m.

Mining operations require liquids storage and sediment separation facilities. We provide highly-engineered solutions to build and protect:

• Reservoirs
• Settling basins
• Tailings dams and ponds
• Frothing tank pads
• Leaching pads
• Hydro-transport pipelines

Using Reinforced Earth walls, built watertight when necessary, in combination with geosynthetic clay liners and geocomposite drainage systems will mitigate and control leakage, seepage, and undermining from erosion and chemical assault.

Mine sites are often located in remote areas having variable soils. When necessary to build upon low bearing-capacity soils, intensive heavy truck and machinery trafficking will eventually cause deformation to superficial roadway layers if not reinforced. Such deformations may slow down operations and decrease on-site productivity, while increasing risks of accidents.

A simple and economical solution is to reinforce access roads using geogrids combined with aggregates to build a composite layer. Our soils experts will assist you in developing solutions using our high-performance geogrids to reduce the amount of aggregates required.

Our solutions result in significant savings in up-front costs, and mitigate the effects of rutting, which in turn reduces long-term maintenance costs.

Our specialists will address natural risk mitigation (such as rockfall and avalanche) with solutions to minimize interruptions to operations. We have expertise in assessing the capacity of existing structures to accept increased loads through upgrades, or to find solutions to make expansions, re-use, or repairs.