Frequently Asked Questions

Burrell Mining's FAQs

A1. Horizontal displacement is right up The CAN”s® alley. The CAN® has been thoroughly tested in both the laboratory and in application to handle horizontal movement. No other standing support is able to withstand horizontal and vertical displacement as well as The CAN®.  We test The CAN® more rigorously than a mine uses them so you are assured to get the finest product available. Please view a time lapsed video of a testing session here.

A2. Generally speaking, CANS® are installed mechanically, using a “CAN Clamp” which attaches to a regular mine scoop or similar piece of mobile underground equipment.  A CAN Clamp eliminates worker exposure to the hazards of lifting and placing a CAN into the correct pattern as prescribed in the mine roof control plan. There are several iterations of CAN Clamps available.  

Contact Burrell’s team to schedule a visit to your mine to assess your needs.  We will recommend a CAN Clamp to best suit your mines situation and productivity objectives. Once a CAN is in place, the void between the top of the CAN and the roof is filled in with wooden crib blocks, cap pieces and wedges. The cribs or cap pieces may be placed between the roof and the top of a CAN® or between the floor and the bottom of the CAN®.  It makes no difference to The CAN® where convergence occurs---either from roof or floor.

A3. An Omega Block® stopping has a minimum requirement to have an approved mine sealant applied on the pressure side of the stopping about the contact areas with the roof and rib line as well as a 6” wide swath at the vertical and horizontal seams.  Additional coating of sealant may be applied per individual mine preference,  either along roof, rib, seams or other applications. Please contact the Burrell team to make an on-site underground visit to help answer your application specific questions.

A4. When considering the installation of a Super Stopping, utilizing Omega 443 Blocks, stability and durability issues must be addressed. At a minimum, an adhesive foam should be used to “glue” the blocks to each other. Voids between the rib line and the beginning or ending block of each course will need to be filled in with a more hearty material such as BBond or Shotcrete. This is a great reason to contact Burrell Mining to get a no-cost on-site visit to make application specific suggestions.

A5. Fibercrib® is a superior product in every aspect when compared to wooden cribs. The list of advantages is fairly significant:

  • Fibercrib® are manufactured from noncombustible materials and will not burn.
  • A Fibercrib® will not dry out and shrink in size. You never have to go back and retighten a Fibercrib® stack.
  • Rotting wooden cribs depletes oxygen content in the mine environment.
  • A 4-point wooden crib has at best 144 ft² of surface area contact with the roof and rib. A standard 6” Fibercrib stack has 77% more surface area of contact.
  • The same 4-point wooden crib is rated at 40-tons of support (after a long drying out period and after much convergence has occurred). 6” Fibercrib are delivered to your mine rated over 4 times stronger and taking less convergence to reach that maximum rated capacity.
  • Fibercrib® have a long shelf life and can be stored underground closer to the action for easy accessibility.
  • Our 2 sizes of Fibercrib® offer versatile stacking combinations to provide larger areas and more tons of support.
Contact Burrell Mining to get a no-cost, on-site visit to see which size Fibercrib® suits your operation the best.