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Steel Sets and Tunnel/Shaft Rings

Steel Sets and Tunnel Shaft
Steel Sets and Tunnel Shaft
Steel Sets and Tunnel Shaft
Steel Sets and Tunnel Shaft
Steel Sets and Tunnel Shaft
Steel Sets and Tunnel Shaft

Steel Sets and Tunnel/Shaft Rings

JENNMAR Specialty Products, in conjunction with our sister affiliate engineering company, Keystone Mining Services (KMS®) can custom design arch and square set support systems as well as tunnel and shaft rings. We use 3-D modeling and finite element analysis to determine beam sizing and spacing as well as orientation and configuration of fasteners and butt plates.
 

Advantages

• Sound structural design
• Advanced steel design according to American Institute of Steel Construction (AISC) national standards
• Reliable moment connection, bolt and welding design
• Computerized steel manufacture equipment to ensure quality cutting, drilling and welding
• Complete accessories including V-decking lagging panel, tie rod, beam extension, leg extension, belt hanger, etc.
• Optimal design according to actual engineering requirements
• JENNMAR and KMS can quickly turn conceptual designs into actual products within a designated time period
• Full technical support by KMS including design customization
• Field installation training services

Square Sets

• Square Sets consist of a straight cross member and two legs, manufactured from a W-section beam selected to meet load
requirements. Square sets are shipped complete with gussets, bolts, nuts and tension rods. Our steel V-Deck lagging panels
and C-Channel runners are optional.

Impact-Resistant Arch Sets

• Impact Resistant Arch Sets are used for immediate roof support. We also manufacture JENNMAR’s RIP® 50- and
100-ton steel props that can be used with JENNMAR’s lightweight high-strength beam.

Mobile Recovery Arches

• Mobile Recovery Arches are used as a mobile canopy recovery unit in the event of a mine roof fall. The recovery units are assembled outby the fall area and are pushed forward under the unsupported top to provide a pathway for workers in the unsupported area.

Long-Radius Arch Sets

• Long-Radius Arches consist of a slightly bent cross member on two straight legs. Long-radius arches are shipped
complete with gussets, bolts, nuts and tension rods. Steel paneled V-Deck lagging and C-Channel runners are optional.

Shaft and Tunnel Rings

• Shaft and tunnel rings are used to shore large, deep vertical and horizontal excavations. The steel liner is a series of
flanged plates bolted together to form a ring that provides structural support necessary to stabilize the excavation.
Lagging can then be placed between the rings to hold the surround soil in place

 

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