Select a System
Forepoling Ring Bit System (Tube Umbrella)
Casing size 76–219 mm
Forepoling ring bit system and casing tubes are designed to be drilled with top hammer or DTH in an umbrella shape as secondary support in the tunnel roof. Weak ground and overburden must be strengthened by grouting through the casing and grouting valves into the ground.
Use with tunneling projects
Forepoling is used to strengthen tunnel roofs in soft or caving ground before excavation. Forepoling casings are drilled nearly horizontally into an arc formation and filled with grout that also spreads into the ground through the casing’s grouting valves. These supporting bars then hold the tunnel roof in place, making further excavation safe.
Main applications
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Forepoling or tube umbrella
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Anchoring
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Micro piling
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PVC drainage
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Fibre glass face stabilization (GFRP system)
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Ground consolidation in front of TBM (GFRP system)
The system is available from 76 to 219 mm casings and for all major DTH shanks and top hammer threads.
Download the pdf data sheet for detailed information and measurements.
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Steel Casings
Steel casings are the most used casing option. Their main features are:
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Ring bit is welded to starter casing in our factory
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Heavy duty ring bit protects the pilot gauge buttons
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Optional one way valves for grouting can be installed in our factory (3–10 bar)
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Rods and other accessories are available
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GFRP casings
Glass fiber reinforced polymer casings are a special type of casings that are used in face stabilization. Their main features are:
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Can be delivered with threaded extension casings
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Ring bits come with GFRP adapters
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Optional one way valves for grouting can be installed in our factory (3–10 bar)
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Rods and other accessories are available
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Mining
Mincon has been supporting mines for over 45 years. Thanks to a global footprint of manufacturing facilities and network of customer support centres, we can supply and service Mincon products in even the most remote and inaccessible parts of the world.
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Construction & Geotechnical
Mincon provides robust drilling solutions for construction and geotechnical projects that ensure structural integrity and safety. Our equipment is optimized for urban development, infrastructure, and foundation work, enabling precise and reliable drilling
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Renewable Energy
Supporting the transition to sustainable energy, Mincon's drilling tools play a critical role in developing renewable energy sites, including wind farms and solar fields. Our solutions facilitate efficient installation processes, contributing to the global green energy initiative.
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Geothermal & Water Well Drilling
Encountering large volumes of groundwater during water-well drilling projects can have a compounding negative impact on productivity. With low energy consumption and high rates of productivity, Mincon products have become The Driller’s Choice for water-well drilling operations.
