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The DD2710 operates on pneumatic rubber tyres—a design choice that enables faster tramming speeds than crawler tracks and the compact turning radius needed in KGHM's 5×4 meter copper mine headings. But pneumatic tyres in Polish underground copper mining face a wear environment that surface mining tyres don't: the mine roadway surface is compacted backfill and fragmented ore in the production areas, with occasional sharp rock fragments from blasting that puncture tyre sidewalls before the tread surface reaches its wear limit. At KGHM's Lubin mine, where the average DD2710 trams 4–5 km per shift over a mixed surface of smooth concrete ramps and rough ore-pass areas, tyre sidewall punctures account for 60% of tyre replacements—not tread wear.
The wear-resistant specification for the DD2710 tyre assembly addresses both failure modes. The tread compound is rated for the compressive and abrasive wear from concrete ramp and ore-surface tramming. The sidewall construction uses reinforced cord layers that resist penetration by angular rock fragments in the 10–25 mm size range—the typical size of blasting debris that remains on ore-pass floors after the main muck has been removed.
Tyre Failure Analysis and Selection for Polish Underground Mining
|
Failure Mode |
Frequency at KGHM Lubin |
Root Cause |
Wear-Resistant Spec Response |
|
Sidewall puncture |
60% of replacements |
Angular blast debris on ore-pass floors |
Reinforced sidewall cord layers |
|
Tread wear (normal) |
25% of replacements |
Concrete ramp abrasion over tramming life |
High-durability tread compound |
|
Bead damage |
10% of replacements |
Rim impact on roadway edge obstacles |
Reinforced bead wire |
|
Inflation failure |
5% of replacements |
Valve damage from rock impact |
Protected valve position; valve caps mandatory |
KGHM Lubin conducts a pre-shift tyre visual inspection as a mandatory item on the DD2710 daily checklist—an experienced operator can identify a compromised sidewall (surface cutting, bulge from internal cord damage) in 2 minutes before the rig enters service. Sending a rig with a damaged sidewall into a 2.5 km tram cycle risks a blowout in a heading where tyre change access is limited. HOVOO supplies DD2710 wear-resistant tyre assemblies and valve components for Polish underground copper mining operations. References at hovooseal.com.
