Epiroc has introduced a fully autonomous version of its SmartROC T35 down-the-hole (DTH) drill rig, designed specifically for unstable high-walls and hazardous mining environments. In open-pit mining, drilling near the crest of a bench is dangerous due to the risk of wall collapse, forcing operators to work in high-stress conditions or leave valuable ore unmined. Epiroc's new platform removes the operator from the cab entirely, allowing the machine to navigate and drill complex patterns via remote control.
The autonomy kit relies on a suite of automotive-grade LiDAR scanners and high-frequency radar units mounted around the rig's chassis. These sensors build a real-time 3D map of the bench, identifying the precise edge of the drop-off and detecting loose rocks or debris. The machine uses this map to plan its own path between drill hole locations, avoiding obstacles without human intervention.
A major engineering breakthrough in the system is the automated "collaring" process. Starting a drill hole on uneven, fractured rock is difficult, often leading to the drill bit skidding or "walking" off target. The autonomous system uses the drill string's sensors to detect the angle of the ground upon contact. It then automatically adjusts the feed pressure and rotation speed to gently "rattle" the bit into the rock face, stabilizing the hole start before ramping up to full percussion power.
Once the hole is drilled to the designated depth, the rig's automated rod handling system disassembles the drill string and blows out the hole with high-pressure air. The entire cycle-from moving to the next hole to drilling-is monitored by a single remote supervisor who can manage up to three rigs simultaneously. By automating the most dangerous aspect of bench drilling, Epiroc is significantly reducing accident rates while increasing productive drilling hours in difficult mining sectors.
