Key Takeaways

  • Autonomous drilling of blast holes is a commercial reality today, led by Epiroc Pit Viper and Sandvik AutoMine rigs.
  • Autonomous rigs hit planned collar locations within roughly ±5 cm, versus roughly ±30 cm for conventional manned drilling.
  • Reported utilization for autonomous rigs runs 85 to 90%, compared with 55 to 65% for manned rigs.
  • Onboard measurement-while-drilling (MWD) sensing overlaps with, and can feed into, probe-based systems like BLASTDOG.
  • The category is still Emerging: full-fleet autonomy is a recent, expanding capability rather than a decade-old standard.

TL;DR

Autonomous drilling works by buying autonomy-capable rigs and letting their onboard control system tram, position and drill each hole from the blast plan. You then use the rig’s navigation and MWD data to check hole quality and feed blast design. Start with a few rigs, a remote operations setup and a clean data pipeline before you scale to the fleet.

What Is Autonomous Drilling?

In an open pit, drill rigs bore a pattern of blast holes into each bench. Explosives go into those holes, and the blast breaks the rock for loading. The position, depth and angle of each hole control how well the blast works. Holes that stray from plan give poor fragmentation, uneven floors and more waste mixed into ore.

Autonomous drilling means the rig does this work without an operator in the cab. GPS navigation, onboard sensors and control software move the rig between holes, set it up and drill to the planned depth. A supervisor watches several rigs from a control room. The “advanced” part is consistency: every hole follows the plan, shift after shift.

How Do I Automate Advanced Drilling With AI?

The automation layer sits in the rig’s onboard control system. It is not a separate software product you bolt on.

Choosing autonomy-capable rigs

Epiroc’s Pit Viper line has run autonomous operations for roughly a decade. It started at a Pilbara iron ore operation and has since spread to dozens of sites across copper, gold, platinum and phosphate. Epiroc’s Rig Control System handles tramming, positioning and drilling. Sandvik extended its underground AutoMine platform to surface drill and blast with AutoMine Surface Fleet. In practice, you procure these rigs from the vendor. Autonomy is not usually a retrofit onto arbitrary existing equipment.

Building the business case for autonomous drilling

The reported numbers are worth knowing when you build the case. Autonomous rigs hit collar positions within about ±5 cm of plan, versus about ±30 cm manned. They also run at 85 to 90% utilization, versus 55 to 65% manned. Epiroc’s own ten-year review is more conservative on utilization. It reports 17% higher average utilization in autonomous mode and 60% better spatial hole accuracy. Use both sets of figures, and test them against your own pit.

Using MWD data from the rig

Every autonomous rig logs measurement-while-drilling data such as penetration rate, torque and pull-down pressure. That data is a direct proxy for rock hardness along each hole. It pairs well with a probe such as BLASTDOG, which logs rock properties after the hole is drilled. Together they give a far richer picture of the bench than either alone. MWD logs also support AI-driven blasthole logging, where drill parameters adjust automatically to the rock.

What to Expect From Autonomous Drilling in Practice

Treat autonomous drilling as a change-management project, not a plug-and-play upgrade. You need geofencing, a remote operations centre, reliable site networks and onboard data pipelines. You also need new roles and procedures for the people who used to drive the rigs. Full-fleet, site-wide autonomy is still expanding, so expect a staged rollout.

The payoff shows up downstream. Accurate holes let blast designers trust their patterns. As a result, AI-optimized blast design can push burden and spacing closer to the limit. Better holes also tend to give more even fragmentation analysis results after the blast.

FAQs

How accurate is autonomous drilling?

Autonomous rigs are reported to place holes within about ±5 cm of the planned collar, compared with about ±30 cm for manned rigs. Epiroc reports a 60% average improvement in spatial accuracy and 85% in depth accuracy. Actual accuracy depends on GPS coverage, bench conditions and how well the drill plan is maintained.

Does autonomous drilling replace drill operators?

It changes the job rather than removing people entirely. One controller can supervise several rigs from a remote operations centre. Maintenance crews, drill-and-blast engineers and field technicians are still needed on site.

Can I retrofit autonomy onto my existing drill rigs?

Usually not in a simple way. Autonomy relies on the rig’s onboard control system, sensors and navigation, so most sites buy autonomy-capable models from vendors like Epiroc or Sandvik. Some newer rigs are sold as automation-ready, so check with your vendor before you plan a fleet change.

What data does autonomous drilling produce?

Each hole comes with its as-drilled position, depth and angle, plus MWD data such as penetration rate and torque. That data shows where holes deviated from plan and how hard the rock was. It feeds blast design, grade control and geotechnical models.

Try It With Geocluster

Autonomous drill data is only as valuable as the modelling pipeline it feeds. Precise collar positions and MWD logs matter most when you reconcile them against your geological and geotechnical models. Geocluster is built to help connect these operational data streams into your broader geological research workflow. Take a look on GitHub, or read how the Geocluster Research Harness works.