Solutions - Rock Bolting
In South Africa it has been recognised that improved bond strength and consistent high installation standards lead to improvements in roof control and a reduction in falls of ground.
Minova RSA offers products of superior design, quality and strength capability to the mining and civil engineering industries.
Video on our Rock Bolting solutions
Resin capsules are specifically developed and formulated for immediate high strength support as an anchoring medium for rock bolts and long tendons used as primary roof support in both coal and hard rock mines and tunnels. They can be installed with hydraulic and pneumatic type bolters.
Resin capsules are available in different lengths and set times, making them suitable for a wide range of bolt sizes and temperature environments. Lokset® Resin capsules are used to control vertical and horizontal strata movement in order to maintain the integrity of the rock and provide safer working conditions. Lockset are also available in a high strength resin for stiffer support systems and in high density rock. Lokset® TooSpeedie spin to stall Capsules, a one capsule system containing both fast and slow resins, for pre-tensioning of long holes. Low Insertion Force (LIF) Capsules are used in hand- held installations where easier penetration at lower thrust is required.
Resin Bolting Accessories
The following accessories are available to make resin rock bolting more productive:
Tophats used to hold resin capsules in place in roofbolt holes and also prevent premature damage of the capsule before the spinning cycle commences.
Parachutes are placed on front end of each capsule. These act as a guide and protection when capsules are pneumatically loaded.
Resin Injectors are used to manually load resin capsules into roofbolt holes in high working places
Rotary Telltales are graphic indicators of strata movement, with amplification
Bobbin Telltales are direct indicators of strata movement
Telltale Installation Rods are used for the installation of Rotary Telltales
Cement Grouts for rockbolting
Where fast but not immediate anchoring is required , Minova RSA has developed four systems for grouting with cements. Capcem Small Diameter Capsules achive anchor strength within one hour. They are simple to use and ensure that the correct water to powder ratio is always obtained. The capsules are soaked in clean water and then inserted into the anchor hole using either a charging stick or injection gun. Capsules are available in a variety of diameters and setting times.
Capcem pumpable grouts are supplied in large capsules which are soaked in water. The grout is then injected into the holes with a low-pressure pump such as the Minova Spudnik pump.
The Capcem PLG long anchor grout family of grouts is supplied in bulk premixed powder form, for mixing and pumping on site. They give controlled expansion, strength and corrosion protection for long-life anchors.
Capram Large Diameter Capsules for grouting of long anchors. The capsules are soaked in water similar to the small diameter Capcem capsules but then require the special Capram Pump to inject the very stiff grout into the anchor hole.
