JENNMAR
ROCBOLT Technologies and ROCBOLT Resins
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Super Twist Torque Tension Rebar

  1. A hole of 1" diameter (or appropriate diameter for size of bar) is drilled into the mine roof strata approximately 1" longer than the torque tension rebar or j-bar used by the mine. Measure from where the plate touches the roof to the top of the bolt. Adjustment to be made to accommodate header boards, crossbars, plank, etc.

  2. Insert resin cartridge into hole. Length and type of resin as specified in the roof control plan.

  3. With the bolt in the bolt wrench, insert the torque/tension bolt into the hole to a point where the roof plate is just slightly off the roof line and no excessive boom pressure is applied. Now rapidly rotate the bolt counter-clockwise for 5-10 seconds (or as per resin manufacturers recommendations for type of resin being used) to insure proper mixing of the resin. Always keep hands away from rotating parts.

  4. Now hold the bolt assembly in place (do not apply any up-thrust) for a minimum of 10-30 seconds (depending what resin is used) to allow the resin to set up properly.

  5. After the resin has set up properly, rotate the bolt assembly clockwise with minimum up thrust and apply a torque to the bolt as per the mine roof control plan. this completes the installation.


 

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