ROCK REINFORCEMENT
hole to avoid reflux and allow sufficient time for installing solid rock bolts . It is especially effective in vertical bolting applications and can also be injected through SDA ’ s ( Self-Drilling Anchors ). It has a low in peak exotherm reaction and heat development compared to polyurethane .
There are three versions of TamPur RBG available , Slow , Standard and Fast set , in order to meet the requirement for different application conditions and processes .
The system allows for easy installation and fixation of rock bolts ensuring full encapsulation of rock bolts even in broken , fractured ground , also enabling excellent corrosion protection . It is non-foaming even in contact with water and will not absorb water . Its thixotropic properties provides easy , secure and precise injection plus it has good adhesion to wet and damp substrates and can penetrate small rock fractures and voids . Other attributes include fast reaction even underwater plus it is fire resistant , has low odour , is environmentally friendly plus is user friendly – it may be injected either manually or automatically . Typical applications in mining are in rock bolting , cable bolt grouting , sealing of large rock fissures and consolidation of broken ground .
Normet adds on different variants : “ Our economical range of silicate modified polyurea injection resins are highly stable , very strong , and chemically resistant . TamPur RBG is available in varying grades for securing all types of rock bolts where early tensioning or loading is required , TamPur 116 is designed for injecting into high convergence zones in deep mining or tunnelling , while TamPur 117 is ideal for void and cavity filling in mining and tunnelling applications .”
Minova – new global HQ and focus
Minova recently celebrated the opening of its new global headquarters in Denver , Colorado , USA . It states : “ Our new office in the Denver Tech Center , a fast growing technology hub , provides an inspiring environment for colleagues and customers across the globe to collaborate . For customers and colleagues everywhere , our Denver HQ is a facility that will bring our mining and infrastructure experts together from five continents to support delivery of solutions to the challenges our customers are facing today .”
At the recent Mining Transformed 2024 event in May , the world ’ s first technical exhibition in an underground operating mine held at NORCAT Underground Centre in Sudbury , Ontario , Minova experts showcased its robust and simple-to-use SK90 Injection System and its fast-setting Carbothix resin .
The SK90 is a pneumatically driven gear pump - the modular structure allows the installation of
Typical applications of Minova CarboThix™ include grouting of cable bolts , solid steel or GFRP bolts , self-drilling anchors and one-step bolting operations in automated mode
gear pump stages for the processing of polyurethane , silicate and phenolic resin . The volumetric conveyor ratio can be changed from 1:1 to 4:1 with little effort . Plastic collection tanks provide clean charging - the collection tank of the A components is additionally equipped with a static mechanism for use with phenolic resin .
Minova ’ s CarboThix™ brand refers to instantly thickening ( thixotropic ) fast curing twocomponent ( 2C ) silicate resins developed for installation of rock-bolts into strata and for
consolidation injection works in disrupted strata . This product was designed to improve the productivity of ground support installation in underground mining and tunnelling applications . Using the pumpable resin enables the load to be taken up in minutes rather than the typical 24 hours from cementitious grouted systems . Typical applications of CarboThix™ include grouting of cable bolts , solid steel or GFRP bolts , self-drilling anchors and one-step bolting operations in automated mode or for consolidation injection works in direct overburden .
CarboThix™ Fast is an immediate partially stiffening and very fast curing dual component silicate resin for bonding injection drilling anchors , also for rock stabilisation and water sealing . CarboThix Fast was developed to improve the productivity of ground support installation in underground mining and tunnelling applications . Using the pumpable resin enables loads to be taken up in minutes rather than the typical 24 hours from cementitious grouted systems .
During application , the two components are intimately mixed and achieve a grease-like viscosity ( the Thix effect ), so that the grout stops flowing and cures to form a tough elastic and non-porous resin that will not mix with water or
be diluted in wet holes . Together they form an interpenetrating network , as a tough elastic nonporous silicate resin . The resulting viscous emulsion will not take up any additional water ( from the rock ), will not mix with water and is resistant to dilute acids and alkalis as well as fats .
As the system is under pump pressure , some grout is pushed into minor cracks and fissures around the anchor hole , ensuring full encapsulation of the anchor . As the two resin components are mixed at a set volume , consistent mixing of the grout is guaranteed , an advantage over cementitious grouts . This delivers a reliable quality of grout and anchoring performance .
Operator safety and handling issues are also improved over cementitious grouting systems . As a pumpable resin system , CarboThix Fast can be handled over long distances ( up to 500 m ) improving operational flexibility .
Minova ’ s comprehensive UniPass bolting system combines its static , yielding and dynamic hollow bolts and CarboThix bulk resins to provide an all-in-one bolting system that has been engineered to suit the most demanding requirements of underground mining and tunnelling . It has been designed with semi- or full- automation of ground support installation in mind .
The UniPass system can be installed in a one step operation by using our self-drilling bolts . The system can also be installed in pre-drilled holes ( two step process ). UniPass is adaptable to varying ambient temperatures , humidity and ground conditions .
UTT Mapei ’ s top tier technologies
Top-tier products and technologies have been developed by the UTT group to solve common challenges in mining . The UTT Group through UTT Mapei designs solutions that completely satisfy all the technical requirements of our clients who serve the mining industry in North America ( and on a global scale ).
The company states : “ Research and product innovation have become a normal part of the everyday culture of Mapei and the UTT Group . A considerable portion of Mapei ’ s annual revenue is reinvested in important R & D projects , allowing us to maintain our leadership position around the globe . Mapei people make the difference . We focus on the needs of the mining industry with the combined experience of the UTT Group and its dedication to solving common and uncommon
challenges underground . We support our mining customers where they work underground , in the mines , laboring side by side until the project is completed or the application meets our clients ’ satisfaction .”
International Mining | AUGUST 2024