TZ5E Electric Dump Truck Underground: Copperbelt Ventilation Savings

Why the TZ5E Wins Underground Copperbelt Mines

The TZ5E heavy electric dump truck is an EV truck built for the confined, ventilation-limited tunnels of the Copperbelt. With a 424 kWh CATL LFP battery and a 424 kW LvKong motor, the TZ5E hauls 40 tonne payloads on 2-5 km underground loops while producing zero diesel exhaust at the face. The single biggest saving is ventilation: a diesel equivalent must push huge volumes of air to clear NOx and particulates, whereas the electric truck cuts the mine's ventilation load by up to 40 percent, directly lowering fan power and the diesel generator burn at the surface that feeds the underground air system.

TZ5E Core Specifications for Underground Duty

The figures below are the ones a mine planning engineer should use for the duty calculation.

The 40 Percent Ventilation Saving Explained

Underground mines size their primary fans for the worst-case diesel fleet. A diesel dump of this class emits roughly 8-12 kg of NOx and 0.3-0.5 kg of particulate per operating hour, forcing air changes of 0.05-0.08 m3/s per kW of installed diesel. Removing the diesel from the loop lets the Ventilation Officer cut primary fan speed by 30-45 percent, which matters because fans are often the single largest electrical load at the shaft. At a Copperbelt mine paying USD 0.10-0.20 per kWh, a 40 percent fan reduction on a 2 MW fan system saves USD 700,000-1.4 million per year, far more than the truck's own charging cost, and it also reduces the surface diesel generator set that backs up the air supply during grid dips.

Heat Load and Battery Swap Underground

Because the TZ5E adds almost no combustion heat at the face, the mine's cooling load drops alongside the ventilation load, a double win in deep hot workplaces. For continuous 20-hour production the truck supports a 5-6 minute battery swap at a mid-level swap bay, so a single chassis runs two shifts without a charger queue. Where swap is not installed, a 360 kW DC charger at the workshop fills the 424 kWh pack from 10 to 80 percent in about 60-75 minutes during the blast and re-entry window, which is idle time anyway.

Energy Cost Versus Diesel Mine Trucks

Mine-site electricity costs about USD 0.08-0.20 per kWh, while diesel at the remote site runs USD 0.90-1.30 per litre after delivery. The TZ5E uses roughly 1.6 kWh/km loaded, costing USD 0.13-0.32 per km. A diesel equivalent burns 0.45-0.55 L/km, costing USD 0.40-0.72 per km, and that diesel also carries the ventilation and cooling penalty above. Across a 15 truck underground fleet running 20 hours per day at 60 km of loop per day, the direct energy gap is worth USD 2.0-4.4 million annually, before the ventilation saving and the 35-40 percent maintenance reduction on the truck itself.

Productivity and Cycle Times

The 424 kW motor holds torque on the 1-in-8 and 1-in-10 ramps common in Copperbelt declines, so loaded climb speed stays 8-12 percent higher than a diesel that loses 3 percent of power per 300 m of depth. On a 3 km loop the TZ5E completes 16-22 cycles per shift at 40 tonnes, moving 640-880 tonnes per truck per day. With regen recovering 10-20 percent of the descent energy, the effective energy per cycle drops further on the downhill return, and there is no diesel warm-up or exhaust purge delay at the start of each blast cycle.

How the TZ5E Compares With Other Dump Models

For underground and surface mine duty the TZ5E sits in the mid-battery class. The comparison helps match pack size to ramp length and shift length.

For a 3-5 km underground loop the 424 kWh TZ5E is the sweet spot; the 600 kWh TZ3V only pays back where single-charge range above 300 km is needed on long surface rail-siding hauls.

Market Outlook and Procurement

The Southern Africa electric truck market is adopting battery-electric haulage fastest in Zambia and the DRC Copperbelt, where ventilation cost and diesel delivery risk dominate mine economics. FOB pricing for the TZ5E lands at USD 95,000-125,000 with containerized shipment from Xi'an to Durban and road transfer in 38 to 46 days. Mines should budget USD 50,000-90,000 per level for swap or fast-charge infrastructure, recoverable inside 12-20 months on ventilation and energy savings alone.

Operator Training, Safety and Ventilation Gains

Underground crews face the hardest environment for any haul truck. The TZ5E's electric drivetrain needs no glow plug, no cold crank and no warm-up idle, so it delivers full 424 kW on the first metre out of the workshop even at depth where the air is thin and hot. Drivers complete a two-day course covering one-pedal control, regen tuning for the ramp descent and safe high-voltage isolation during pack service. Dongfeng certifies each operator and issues a digital card that the truck reads before shifting, protecting both the battery warranty and the mine's ventilation audit that now governs how many diesel units may run on a single level.

Safety and support points the mine should plan for:

• High-voltage isolation training is mandatory before any operator takes a shift underground.
• Zero diesel exhaust at the face cuts the primary fan load by up to 40 percent.
• No combustion heat means the cooling load and chilled-water demand also fall.
• Two-year recommended spares kit ships with every TZ5E to protect production uptime.
• Over-the-air diagnostics flag cell imbalance before it costs range or power.
• Battery swap in 5-6 minutes keeps a chassis on two shifts without a charger queue.

Because the TZ5E adds almost no heat or fumes at the working face, crews report better visibility and lower fatigue on 20-hour production cycles, which directly lifts the tonnes moved per shift that the whole ore-tonnage bonus is built on. The mine also gains scheduling freedom: where diesel units once had to be rationed to stay under the ventilation cap, the electric fleet lets planners add a third truck to a level without rebuilding the fan system, a capital saving measured in millions of dollars against the alternative of a new primary ventilation installation.

For the finance team the story is equally clear. The 40 percent fan reduction on a 2 MW system saves USD 700,000-1.4 million per year in electricity and diesel-generator fuel, and that recurring saving alone repays the charging and swap infrastructure inside 12-20 months before a single tonne of haulage saving is counted, making the TZ5E one of the rare mine electrification cases where the payback does not depend on a high carbon price to close and survive a downturn in the copper price.

Mines planning a phased rollout should start with the deepest, most ventilation-constrained level where the 40 percent fan saving is largest, then expand as swap or charge bays are commissioned. With energy at USD 0.13-0.32 per km and maintenance 35-40 percent below diesel, most Copperbelt operations reach positive cash flow inside 18 months once the ventilation rebate is counted, a timeline that fits the typical two-year mine improvement budget and leaves headroom against copper price dips.

Ready to electrify your fleet? Contact Shaanxi Fenghan Trading — authorized Dongfeng EV truck exporter. WhatsApp: +86 153 1943 1311 | Email: sales@fenghan-trade.com | dongfengevtrucks.com

🌐 Our Network: Fenghan Trade (SAGMOTO/SHACMAN Truck Export) · heavy duty mining dump truck 6x4 8x4

← Back to Blog | Home