IM 2021 September 21 | Page 53

MECHANISED COAL
operation . It is 60 m long , and its four-piece compound cutter disc has a diameter of 4.5 m .
NHI claims to be the only heavy machinery manufacturing enterprise in the world that currently applies TBMs on a major scale to the construction of coal mine rock roadways .
“ The system of machines can be customised and designed according to the user ’ s requirements , such as mesh , arch frame , anchor rod , advance drilling , synchronous spray mixing ( shotcreting ), etc and a complete set of solutions can be provided for the special requirements of the project , such as well ( shaft ) transportation , site assembly , initial operation , disassembly , site transfer , etc ,” the company said .
Still on roadway development , Sandvik Mining and Rock Solutions recently completed the world ’ s first upgrade of a MB670 bolter miner to the latest MB670-1 design specifications for the Urgalugol company , part of one of the largest coal mining enterprises in Russia , SUEK JSC .
Since 2013 , the Sandvik MB670 has been in operation at the Severnaya mine in the Khabarovsk Territory . The mine management decided to modernise the equipment , which personnel of the Sandvik Mining and Rock Solutions service centre in Kemerovo carried out in parallel with an overhaul .
The modernisation of the bolter miner was carried out in the shortest possible time : in four months , it was possible to completely replace the entire hydraulic and electrical system with the corresponding MB670-1 setup , as well as replace all high-pressure hoses with new ones made locally at the service centre as well as fittings , wear-resistant sheets and cylinders . All gearboxes were redesigned , and the geometry of the supporting structures was restored to factory dimensions .
The upgrade of the MB670 miner for Urgalugol is notable for the fact it is the first Sandvik example of such a bolter miner refurbishment with simultaneous upgrade in the world . The parties , at the time of this first delivery , were negotiating the timing of the modernisation of a second miner .
Sandvik Mining and Rock Solutions recently completed the world ’ s first upgrade of a MB670 bolter miner to the latest MB670-1 design specifications for the Urgalugol company , part of one of the largest coal mining enterprises in Russia , SUEK JSC
Vitaly Pogudin , Head of the Kemerovo service centre of Sandvik Mining and Rock Solutions in Kemerovo , said : “ A reconditioned and modernised combine is almost indistinguishable from a new one . The project was
completed in the shortest possible time due to the high professionalism of the team of the service centre in Kemerovo . Having saved the customer ’ s
time and resources , we not only gave the machine a second life , but also improved its performance , which now corresponds to the level of the latest equipment in our line .”
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