The challenges facing the mining industry with relation to lowering of emissions and compliance with regulations that have become stricter of late, and the related challenges of minimizing cost of idling and excessive expenditure, are compounded in the migodi ya chini ya ardhi where there is limited ventilation and greater emphasis on safety. However, most of the power options – including renewable diesel, hydrogen, batteries and fuel cells – can be put through their paces using the most tried and tested of underground mining equipment, the Underground Mining Loader.
Under the hood of 2026: Real Deployments, Trade-offs and Mine-Specific Technologies.
The Push for Cleaner Power in Underground Mining
Mines operate in harsh spots. Deep underground, air quality matters more than almost anywhere else. Traditional diesel loaders have powered the industry for decades. They deliver strong torque and run long shifts. Yet regulators in Europe, North America, and parts of Australia now limit diesel particulate matter. Some sites already face carbon taxes or emission caps.
So there is slow evolution to low emission vehicles and fuels. The use of renewable diesel is straight forward and typically just requires refueling rather than major modification to engines or vehicles. Hydrogen fueled vehicles or fuel cell electric vehicles offer the zero tailpipe emission option but present a number of challenges, such as storage, as do battery electric vehicles, weight for example.
Renewable Diesel: The Practical Bridge
Starting to use renewable diesel in a mine can be quite easy. Renewable diesel is produced from waste oil or from plant material and can be used in any diesel engine. A large copper mine in Chile changed 40% of its fleet last year to run on renewable diesel. The mechanics found very little difference in terms of running and performance, in some cases even the fuel filters stayed cleaner, and the operators could even hear the difference as it ran a bit quieter.
Availability in remote areas of the supply chain is limited. Price levels for this fuel type of 10-30% above diesel can vary depending on location. It could be worth while for a medium sized operation using Underground Mining Loaders for short hauls to give it a try while at the same time testing other alternatives.
Battery Electric Systems: Strong in Smaller Applications
In mines with narrow tunnels and short cycle times, battery-powered equipment is ideal. A Canadian nickel mine recently put into operation a number of electric-powered loaders in 2025. These are charged during the shift changes using an overhead pantograph or quick change of battery packs. A significant reduction in costs for ventilation has been detected due to the absence of diesel exhaust.
Underground equipment is getting cleaner and are quieter than ever before. Immediate torque and smooth controls make for excellent operating. However the weight of the battery does affect the amount of payload that can be hauled. In cold underground temperatures the range is further affected. Current models generally have a cycle life of 4-6 hours on a single charge. This makes them suitable for most forms of development but not suited to high-production type stopes operating 24 hours a day.
Hydrogen and Fuel Cells: The Long-Haul Promise
Hydrogen fuel cells can produce the electricity required on board a vehicle and they even only produce water as a byproduct. A few large iron ore mines in Australia are currently undertaking pilot tests with Underground Mining Loaders powered by fuel cells. The trucks are refueled in minutes whereas the hours of battery recharging that are required for typical trucks would not allow for such continuous usage, particularly in heavy and continuous work.
Establishing a hydrogen-based infrastructure for mines is expensive. For underground mines, production on site or a reliable supply by pipe to the surface is required. Storage of hydrogen also needs to be protected against misuse. Although first results seem to be promising, above all durability in dusty as well as in wet environments needs to be proven by more experience.
Finding the Right Balance for Different Mines
There is no one size fits all. Smart mine operators use a variety of technologies to suit the specific mine layout, to meet their production objectives and to take advantage of the specific resources they have at their disposal.
Factors that shape decisions:
- Depth and ventilation— Deeper mines benefit more from zero-emission options to cut fan power costs.
- Haul distances— Longer runs favor hydrogen or renewable diesel.
- Duty cycles— High-intensity loading suits fuel cells; shorter repetitive tasks work well with batteries.
- Capital vs operating costs— Batteries often have higher upfront prices but lower energy costs over time.
Here’s a quick comparison many fleet managers use:
| Technology | Refuel/Recharge Time | Emissions | Best For | Main Drawback |
| Renewable Diesel | Minutes | Low | Existing fleets, long hauls | Supply availability |
| Battery Electric | 1-4 hours | Zero | Short cycles, narrow tunnels | Weight and range limits |
| Hydrogen Fuel Cell | Minutes | Zero | Heavy continuous work | Infrastructure cost |
Real mines rarely go all-in on one. A typical mid-sized underground operation might run renewable diesel on main production loaders, battery units in development areas, and test a fuel-cell prototype on a trial basis.
The Role of Modern Underground Mining Loaders
Much of the new underground equipment is centered around the Underground Mining Loader. These Trackless LHD’s (Load-Haul-Dump) are going to have to perform well in the tough underground environment whether powered by diesel, battery or some future hybrid application.
ya ZDL614 is another example. With a 6m³ bucket capacity of 14 tons in 4.5m x 4.5m tunnels the machine is able to handle large quantities of ore and waste rock. Its central articulation and swing rear axle make it highly maneuverable in tight spots and the operators are pleased with the enclosed cab with air conditioning plus excellent visibility. When a mine is trialing new powertrains the proven mechanical chassis of these loaders is often modified to test the power unit.
There are now many loaders that are designed to be powered by a variety of different energy sources. For example, some of the loaders that are being operated using renewable diesel today will be capable of being converted to operate using hydrogen in the future. This means that the mines will be able to avoid having their capital investment ‘stranded’ as new technologies emerge.
What the Next Few Years Look Like
By 2030, most analysts expect a blended approach to dominate. Renewable diesel will likely remain the backbone for many fleets, especially in developing regions. Battery tech will improve fast for smaller and mid-sized loaders. Hydrogen will grow where mines can justify the infrastructure.
The key? Data. Mines that closely track fuel use, maintenance costs, and productivity for each power type make smarter decisions. Pilot programs with just a few Underground Mining Loaders often reveal what works before committing the whole fleet.
QINGDAO ZONGDA MACHINERY CO., LTD brings solid experience to this changing landscape. Established about ten years ago by mining veterans, the company focuses on trackless underground equipment that performs day after day in tough conditions. They build loaders, trucks, and utility vehicles with an eye toward real mine needs—strong frames, reliable hydraulics, and cabs that keep operators comfortable.
What stands out is their practical approach. ZONGDA works closely with customers during equipment upgrades and new project setups. Their team includes engineers who understand both mechanical systems and the push toward cleaner operations. Many of their Underground Mining Loaders feature designs that support different power configurations as mines evolve. With a focus on quality manufacturing in Qingdao and solid after-sales support, ZONGDA has earned repeat business from operations across multiple continents. They don’t just sell machines—they help mines think through how new equipment fits into broader sustainability goals.
Hitimisho
The mining industry is not picking winners and losers between renewable diesel, hydrogen, battery and fuel-cell technologies. Instead, the industry is learning how best to combine them all to create the most effective solution for their needs. By implementing a balanced approach, the industry can reduce emissions while maintaining productivity and safety. To test the various technologies, it is logical to start with the Underground Mining Loader, as it is used for the majority of material movement on a daily basis.
By continuing to stay agile and making data-driven decisions companies will come out on top as the industry transitions to a cleaner operation.
Maswali ya kawaida
How do Underground Mining Loaders fit into the shift toward battery and hydrogen power?
Modern Underground Mining Loaders like those from ZONGDA often use proven chassis that can accept different powertrains. This lets mines test battery or hydrogen versions without redesigning their entire workflow.
What challenges come with running battery-powered Underground Mining Loaders underground?
Battery units need careful charging schedules and good thermal management. In deeper mines, they reduce ventilation demands, but payload capacity and cycle times require planning compared to diesel models.
Can renewable diesel be used in current Underground Mining Loaders without modification?
Yes. The vast majority of current Underground Mining Loaders are designed to operate on renewable diesel as a “drop in” fuel replacement. It is a very attractive “first step” in reducing emissions in underground mines for the short term, and to allow time to fully evaluate the potential of alternative technologies such as fuel cells for longer term use.
How are mines deciding between hydrogen fuel cells and battery systems for their loaders?
It usually comes down to duty cycle and infrastructure. Hydrogen works better for long, heavy shifts with fast refueling. Batteries suit shorter, repetitive tasks where charging stations can be set up near work areas.
What should mine operators look for when upgrading their Underground Mining Loader fleet?
Focus on equipment designed for flexibility, strong local support, and proven durability in similar conditions. Manufacturers with real mining experience help match the right power solution to your specific mine layout and goals.
