IMARC preview: Epiroc’s Matilda ready to waltz in
- 15 October 2025
The star attraction on the floor of this year’s International Mining and Resources Conference + Expo at ICC Sydney? Well, it’s hard to go past Matilda.
Making her maiden public appearance in Australia, Epiroc’s Minetruck MT66 S eDrive is described by the manufacturer as a breakthrough in underground mine haulage, delivering maximum payload in a package designed to transport the industry from a diesel-mechanical-drivetrain dominated present into a heavy-duty electric future.
“The introduction of diesel-electric technology to underground mining marks a step-change for the industry,” says an Epiroc spokesperson.
“While the concept itself is proven above ground underground haulage presents challenges such as restricted ventilation, heat management and limited working envelopes.
“Re-engineering the drivetrain to suit these conditions has created a solution that is both original and transformative.”
The Minetruck MT66 S eDrive, nicknamed ‘Matilda’, made an appearance at MINExpo in Las Vegas last year before “exceeding expectations” on verification and trial runs when the truck carted 66 tonnes on a 14% incline grade at up to 10km per hour.
Post-IMARC, Matilda heads to Western Australia and Gold Fields’ Granny Smith mine near Laverton.
Epiroc says adaptation of diesel-electric systems for high-payload trucking underground is a breakthrough that creates a pathway to future zero-emission technologies.
The highest-capacity underground haul truck on the market, the Minetruck MT66 S eDrive has a redesigned lightweight frame, powerful John Deere 18-litre Stage V engine, and advanced drivetrain said to enable up to 11% higher ramp speeds, increased acceleration and improved fuel efficiency compared with Epiroc’s Minetruck MT65 S.
Despite its increased payload capacity the truck fits in the same excavation envelope as existing 60t trucks, which means no additional mine development or rework.
The Stage V emission-rated engine has the most stringent standard currently available, promising significant reductions in diesel particulate matter, nitrogen oxides and carbon monoxide compared with older tier-two engines still common in underground fleets. With the more efficient electric drivetrain, the combination means lower overall fuel use and emissions per tonne hauled.
“The removal of a conventional mechanical driveline simplifies operation and reduces maintenance requirements, further lowering operating costs while enhancing reliability and availability,” the manufacturer says.
Beyond productivity, says Epiroc, the innovation supports environmental and social goals.
“By reducing harmful exhaust emissions and optimising fuel use the Minetruck MT66 S eDrive improves underground air quality and contributes to safer working conditions.
“Although ventilation and cooling remain essential in underground environments, the reduction in pollutants represents a meaningful step towards improved occupational health outcomes.
“Crucially, the electric drivetrain has been designed to future-proof the truck, enabling seamless integration with emerging power solutions such as battery, trolley assist or hybrid systems.
“This positions the Minetruck MT66 S eDrive not only as a high-performing diesel-electric truck today but also as a critical platform in the mining industry’s long-term transition towards sustainable, zero-emission operations.”
Full commercial release of the MT66 S eDrive is targeted for 2027.
