Certificate in Mining Studies
ELECTRIFYING THE MINING PROCESS advantage and convenience of extra space for taking mining or tool equipment. All wheel drive, extreme stable axles and more stability through oil-immersed multiple disc brakes reflect the care about safety-in-mining.”
Safety, innovation and effectiveness are typical Paus issues. One example was the previously mentioned electric dump truck MKU 10E operated on a trolley line. In this case the great advantage was its flexibility. A cable reel was designed to fit on the roof including a 35 m long cable which was connected to the trolley line. Paus says it was the first truck which had the ability to drive away from the overhead line into crosscuts.
Dip. Ing. Mortimer Glinz, Managing Director of GHH Fahrzeuge says his company“ sees a great future for electric-driven underground vehicles due to rising health and security standards and strict environmental requirements for underground equipment. Just recently the legal workplace exposure limits to CO and NOx for underground mining in Germany have been reduced drastically. New levels will require an average emission reduction to Tier 4 of all operated equipment. This will become effective during the next couple of years forcing mines to invest in new equipment and to compensate for old machinery with electric machines. In terms of total cost this development will further improve the business case for electric machines.
“ For production applications battery driven vehicles face the challenge that energy requirements are still above current battery performance. As a solution GHH has been offering a range of tethered / cable powered electric LHDs with loading capacities from 10 up to 21 t.”
Recently GHH has added a battery to the newest design of its tethered 19 t LHD, the LF- 19EB. Its drive train includes a water-cooled electric motor and new electronics to reduce power and space consumption. The cable drum has a maximum capacity of 280 m allowing for a working radius above 550 m. It collects the cable in a predefined pattern and thus maximises the life of the cable“ resulting in best in class operating cost,” GHH claims.
“ Overall GHH Fahrzeuge is a big believer in electric LHDs and we see a lot of future potential. This entire development will make our business safer; it will help the health of the miners and mine operators will save other costs,” says Mortimer Glinz, Managing Director
The battery not only enables the LHD to relocate independently, almost more importantly it can be used as an overboost. With the added power the LHD offers superior loading and acceleration performance and optimised cycle times. Furthermore it substantially reduces the requirements for the electric mine infrastructure, which can be a constraint for more electric equipment. GHH will be offering this option for all its tethered LHDs in the future.
TOMCAR says its recently-released electric vehicle is“ one of the only advanced, highperformance 100 % electrical all-terrain vehicles offered worldwide. Mining professionals are loving the fact that our electrical vehicle emits no diesel particulate matter, which the Mine Safety and Health Administration( MSHA) has deemed dangerous to workers’ health,” said Ram Zarchi, CEO of TOMCAR.“ Low maintenance costs, no emissions, and less noise make this an easy sell for anyone who wants to take their work environment to the next level of safety and performance.”
TOMCAR’ s mining vehicles have been in service in underground mining for over 10 years. Over the past decade, mining has become TOMCAR’ s second largest market sector( after military) and the company has developed a customisable mining vehicle- incorporating feedback from dozens of operators. TOMCAR has also developed a mine-specific preventative maintenance program which is implemented by its team on-site.
Its rugged construction and fully-welded highgrade steel frame make it ideal for operating under the extreme conditions and tough demands of mining industries, while providing operators with great safety designed to last decades with quick on-site repair.
“ The TOMCAR has not disappointed,” said Johannes Sondergaard, Mine Engineer at Esterhazy’ s K1 potash mine in Canada.“ The TOMCAR has an incredibly low centre of gravity. This, in combination with the high ground clearance, independent suspension, and rollover protection has left me feeling safe and comfortable in all of the operating conditions that the mine has to offer. It has no trouble powering four adults through the hills and valleys of the mine. It is a pleasure to find a machine that I actually enjoy driving throughout the mine for a twelve-hour shift.”
Saminco has designed a‘ Pure Electric’ propulsion system for underground mining vehicles that will last an entire eight-hour shift before needing a recharge, the company reports, continuing that“ current technology requires recharging batteries every four hours. Mining production requires an independently powered vehicle. Existing battery-powered LHDs simply replace the diesel engine with a battery-powered inverter driving a large electric motor coupled to
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FEBRUARY 2017 | International Mining 75