The mine roof is effectively suspended by anchoring the different layers of strata together. The mine or tunnel roof is effectively suspended by anchoring the different layers of strata together.
Anchorage is accomplished with the assistance of an expansion shell. The Mechanical Bolt is tensioned during installation, which sets the expansion shell against the borehole wall. Mechanical Bolts are offered with a standard expansion shell or bail style expansion shell.
Matched Bearing Plate systems and Minova resin capsules are available for all Minova Rebar Bolts.
Minova Reinforcing Steel Bar (Rebar) is manufactured to critical tolerances and standards to meet the day-to-day needs of our mining customers. Our comprehensive quality control program ensures that each Rebar Bolt order arrives at your site just as you have specified. And, because Minova is a world leader in manufacturing, you can be assured that we will be able to fill your orders quickly and efficiently, regardless of the size of the delivery requirement.
Minova Rebar Bolts are made from grade 40, 60 and 75 steel and can be manufactured as bendable products for low seam applications.
Where better beam building is needed, the Tension Rebar Bolt System has strength characteristics to meet your needs.
They boast the dual benefit of providing more control at a lower cost.
The Double Lok Bolt does not require any special tools or installation techniques. Instead, when used with the proper Minova resin, the Double Lok Bolt expansion shell sets the initial anchorage and allows the resin to cure while the roof is in a state of compression.
Additional anchorage for this system takes place along the interface of the bolt shaft, resin, and borehole wall. The “combination anchorage” of the expansion shell and resin has proven very successful for adverse ground conditions.