ROCK REINFORCEMENT grouting ), offering excellent mechanical properties . Benefits for the anchoring of rockbolts or cable bolts include full column grouting despite borehole condition ; significant reduction of installation time ; penetration of the resin in even the most minor cracks ; plus adjustable setting time and thixotropy . It is also non foaming and can adhere to damp surfaces ; and it offers quick curing to full strength and does not intermix with water . It is designed for Epiroc ’ s Boltec and Cabletec or SKID units .
Additionally , Weber designed the Thixo Skid- Pod , a modular unit that delivers ‘ plug and play ’ injection capability for the Potentia Thixo resin . This autonomous unit is equipped with 2 x 200 l tanks for components A & B , offering an efficient and practical solution for various applications , combining autonomy and performance . This selfcontained pumping and resin injection unit can be installed onto or next to any bolter rig , jumbo , boom lift , or utility truck .
DSI ’ s Mineral Bolt seeing increased use in mining
As stated , resin injection type bolting is an excellent new technology that can significantly increase safety and speed up development . In many instances , it can greatly improve rock support in in all sorts of ground conditions . DSI ’ s offering in silicate resin is called ‘ Mineral Bolt .’ The thixotropic silicate resin can be used with a wide variety of the bolts , such as DSI ’ s bolts , standard and FRP rebar , both solid and hollow core , dynamic hollow core , cable bolts , VersaBolt etc .
DSI says the resin chemistry is one of the most advanced in the market , and bond strength testing has been done with a wide range of bolts and installation parameters . DSI adds it can assist mines in choosing the optimum combination of bolt and hole diameters , as well as the fastest set times to maximise productivity . The use of Mineral Bolt injection resin is becoming increasingly used due to several advantages . Set times can be configured to the individual applications plus the fast curing process speeds up rock support and therefore development . Both component A and B are both low viscosity , making it easy pumped , including long distances . The resin is thixotropic , and once pumping stops , viscosity increases and will stay in place . It is easily mixed , and can be used in difficult works in the presence of water and all types of ground conditions - it is especially useful in loose and fractured rock , but also when drill holes become oversized and conventional bolting proves difficult . It is versatile for systems logistics , supplied in everything from small drums to higher volume containers , plus no dust issue that is associated with mixing cement and reduced physical handling in comparison with cement . DSI says consistent quality control is assured with every bolt install , when pumped in the proper ratio of 1:1 and it can be used with automated bolters or with manual installations .
DSI ’ s Underground Chemicals General Manager , Robert Penczek told IM : “ Resin injection products have developed to such a degree that they can now be adapted to the latest automated bolter designs and further equipment development is ongoing . DSI is developing many pumping platforms at the necessary pumping accessories to inject the resins . Mineral Bolt resin is a perfect grout for hollow core bars and dynamic hollow core bars , especially automated installed bolts . Mineral Bolt resin set times can be manufactured to minimise wait times for all bolt types and installation equipment and methods .” He added that Mineral Bolt is in use at a wide range of mines with customers including JSW and Bogdanka in the Polish coal mines ; Boliden ’ s metallic mines in Sweden ; ICL ’ s potash operations plus other mines operated by Rio Tinto , Glencore and K + S .
With the advent of Mineral Bolt resin , DSI says acceptance of resin injection bolting is increasing quickly for the following reasons - one hole , one
DSI says its Mineral Bolt resin chemistry is one of the most advanced in the market , and bond strength testing has been done with a wide range of bolts and installation parameters
bolt with immediate support can easily be done , reducing the risk of ground falls , operator safety is improved since the operator is always be under supported ground , and the immediate support reduces falls that can damage drilling equipment .
The lengths of bolts and the large annular gap very often associated with many bolts systems are no longer a critical issue , plus high speed and one man bolting operation ensures lower costs .
“ The combination of a well-formulated Mineral Bolt resin with a modern automatic bolting machine is the prospect of technical and financial success in underground mining , increases safety of bolting operations .”
Normet ’ s Tampur RBG
Moving to Normet , its TamPur RBG A ( Rock Bolt Grout ) is an injectable , two-component solventfree , polyurea-silicate grout . TamPur RBG A has been formulated for securing and sealing rock bolts in mining and tunnelling applications . It is designed to instantly thicken after injection retaining a thixotropic nature within the rock bolt
Normet ' s TamPur RBG A has been formulated for securing and sealing rock bolts in mining and tunnelling applications
AUGUST 2024 | International Mining