Epiroc drilling rig reduces fuel use and downtime

The mining and cement production sector, particularly quarry drilling in fractured rock formations, requires equipment capable of maintaining consistent penetration rates while minimizing fuel consumption and unplanned downtime. In this context, Epiroc introduced an upgraded surface drill rig deployed by Yen Binh Cement at its limestone quarry in Lao Cai, Vietnam, to address operational inefficiencies linked to variable geology.

Operating in highly fractured limestone, the site faced frequent drill string failures, inconsistent drilling performance, and elevated fuel consumption—factors directly impacting production continuity and cost control.

Drilling challenges in fractured limestone formations
The quarry environment is characterized by variable rock resistance, which increases mechanical stress on drilling components. This led to frequent rod breakages, disrupting blasting schedules and causing delays in downstream cement production.

In addition, rigs often operated at higher engine speeds than required, increasing diesel consumption. Maintenance operations were also constrained by limited accessibility to key components and the remote location of the site, extending service times and costs.

Improved energy efficiency and drilling performance
The upgraded drill rig introduces an engine control system that adjusts engine speed based on real-time drilling demand. This reduces unnecessary fuel consumption while maintaining optimal drilling performance.

At the same time, improvements in impact energy transfer and drilling stability enable more consistent penetration rates, even in fractured ground conditions. This contributes to shorter drilling cycles and improved predictability in blasting operations.

Field results indicate a reduction in fuel consumption of approximately 30% per meter drilled, translating into measurable operational cost savings under typical production volumes.

Reduced rod breakage and maintenance requirements
Mechanical improvements in the drilling system help reduce stress on the drill string, lowering the frequency of rod failures. This directly reduces unplanned downtime and the need for tool replacement.

The rig also features a redesigned hydraulic layout and improved accessibility to key components such as the engine, cooling system, and control valves. Combined with a central automatic lubrication system, these changes simplify maintenance tasks and reduce service intervals.

Operator interface and automation
The system incorporates an updated operator cabin with enhanced visibility and a touchscreen interface for machine control. Automation features, including assisted drilling and advanced rod handling, reduce operator workload and improve consistency in operation.

These features are particularly relevant in remote quarry environments, where operator availability and retention can be challenging. Simplified controls and reduced physical strain contribute to safer and more efficient operation.

Deployment and operational results
Following commissioning and on-site training, the rig reached full operational capacity within a short timeframe. Improvements were observed within the first week, including reduced fuel usage, fewer drilling interruptions, and more stable production planning.

More consistent penetration rates and fewer rod failures contributed to improved scheduling of blasting activities, reducing delays across the production chain.

Applications in quarry and mining operations
The drilling solution is suited to:

By combining adaptive engine control, improved mechanical design, and operator-focused features, the system enables more predictable and cost-efficient drilling in challenging geological conditions.

Edited by Natania Lyngdoh, Induportals Editor — Adapted by AI.

www.epiroc.com