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Combination Bolt

Combination Bolt System
Combination Bolt SystemJbarSpecs
Combination Bolt SystemRebarSpecs
Combination Bolt SystemSmoothBarDimentions
Combination Bolt SystemSmoothBarSpecs
ForgedHeadCombination Bolt System
Combo Bolt
Combo Bolt
Combo Bolt Video
Combination Bolt System
Combination Bolt SystemJbarSpecs
Combination Bolt SystemRebarSpecs
Combination Bolt SystemSmoothBarDimentions
Combination Bolt SystemSmoothBarSpecs
ForgedHeadCombination Bolt System
Combo Bolt
Combo Bolt
Combo Bolt Video

Combination Bolt System

JENNMAR offers the industry’s most proven combination bolt system in the mining industry. The Combination Bolt is a two-piece bolt. The upper piece, available in additional combinations, consists of JENNMAR’s exclusive J-BAR® for better mixing, stronger threads, and greater anchorage capacity. The lower piece (a headed smooth bar) is connected to the top bolt by a coupler. The Combination Bolt provides ultimate tension in weak strata. The top portion (J-BAR) is encapsulated with resin, while the lower anchor is tensioned to the roof with our bearing plate.


Advantages

• The ultimate tension resin system for all seam heights
• No need to bend for insertion
• Proven Shear Pin system with coupler
• Proven usage in longwall headgate and tailgate entries as supplemental or primary support
• Prevent roof sag and lateral roof movement

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