Komatsu has introduced its first-ever electric underground drilling and bolting rigs, marking a significant advancement in the Japanese construction giant’s hard rock mining portfolio.
The launch is part of a broader update to the second generation of Komatsu’s Z2 line of small-class development drill and bolting equipment. This updated line includes an innovative resin-pumping system, optimized operator cabin ergonomics, and advanced telematics. The all-electric versions of the Komatsu ZJ21 jumbo drill and ZB21 bolter are built on a common platform, featuring a modular battery driveline specifically designed to endure the demanding cycles and challenges of hard rock mining.
“As underground mining operations increasingly shift toward electrification of their fleets, our innovative, battery-powered Z2 jumbo drills and bolters will support that pivotal transition. By integrating into existing infrastructure, we can help enhance productivity while helping to reduce operating costs,” said Johan Kempe, product director for underground drilling at Komatsu. “The rollout of our second generation Z2-class marks a milestone in our commitment to advancing mining technologies and building upon the proven success of our products to empower the future of mine operators.”
ZB21 Bolter
The new Komatsu ZB21 bolter is a small-class machine with a fully enclosed, ROPS/FOPS-certified operator cabin featuring updated controls, integrated screen handling, and industry-leading drifters manufactured by Montabert. This second-generation bolter also offers an optional pumpable resin system using J-LOK P, developed by Jennmar. This unique system allows resin to be pumped into drilled holes before bolt installation, enabling the use of more economical bolts and reducing overall project costs.
ZJ21 Electric Drill
The Komatsu ZJ21 jumbo drill, which shares many modular components with the ZB21, includes a similar operator cabin, innovative drilling feeds, advanced pilot hydraulics, and new Montabert drifters. Both vehicles are equipped with an 83 kWh lithium-ion battery pack, likely developed in collaboration with American Battery Solutions (ABS), which Komatsu acquired last year. This acquisition aligns with Komatsu’s ESG goals of achieving a 50% reduction in CO2 emissions from its products by 2030 (compared to 2010 levels) and achieving company-wide carbon neutrality by 2050.
Komatsu asserts that its battery electric vehicles (BEVs) are designed to boost productivity compared to diesel-powered alternatives, thanks to onboard charging, smart opportunistic charging capabilities, and full compatibility with existing infrastructure. These new electric vehicles represent a strategic move by Komatsu to mine lithium using lithium-powered machinery, demonstrating a smart, forward-thinking approach.
Looking ahead, there is anticipation for more electric vehicle innovations from Komatsu as they continue to push the boundaries of mining technology.