Epiroc Deploys Electric Drill Rig for Metro Construction

SmartROC T35 BE enables emission-free surface drilling with satellite-guided precision, supporting urban infrastructure projects with reduced noise and improved accuracy.  www.epiroc.com Construction, tunnelling, and urban infrastructure sectors are adopting electrified equipment to meet stricter environmental requirements, as Epiroc introduces the SmartROC T35 BE electric drill rig for use on the Fornebubanen metro project in Oslo. The project, one of the largest metro expansions in the city in decades, involves drilling in densely populated areas where emissions and noise are critical constraints. Unlike conventional diesel-powered rigs, the SmartROC T35 BE operates fully electrically, eliminating on-site emissions while maintaining the performance required for surface drilling applications. The rig is currently being used by contractor Grunn Solid to support drilling operations along the metro line. Electrification of Surface Drilling Operations While electric drilling is already established in underground environments, its application in surface drilling remains limited due to operational and infrastructure challenges. The SmartROC T35 BE addresses this by adapting proven drilling technologies to an electric platform, enabling its use in open, urban construction sites. The rig is based on an existing platform but has been re-engineered to integrate electric drive systems. This allows for lower operating costs compared to diesel alternatives, as well as improved energy efficiency during continuous drilling operations. Precision Drilling with Integrated Navigation A key feature of the system is the integration of satellite navigation, which enhances drilling accuracy by providing real-time positioning data. This enables operators to control hole placement, depth, and angle with a high degree of precision. Accurate drilling is particularly important in large infrastructure projects, where deviations can lead to increased material usage, rework, and energy consumption. The system also allows documentation of drilling activities, supporting traceability and project planning through generated drilling maps. Fornebubanen is an under construction rail line which will serve the Fornebu peninsula in Bærum, in greater Oslo. Thanks to the SmartROC T35 BE rig, contractor Grunn Solid can drill free from on-site emissons. Operational Challenges and System Adaptation Deploying an electric rig in surface conditions introduces new operational considerations, particularly in areas such as power supply and cable management. Managing electrical connections safely on active construction sites requires adjustments to workflows and equipment handling. Field deployment on the Fornebubanen project provides real-world data on system performance, maintenance needs, and operational constraints. These insights are being used to refine future designs of electric drilling equipment for both construction and mining applications. Environmental and Efficiency Benefits The primary advantage of the electric rig is the elimination of direct emissions during operation, which is especially relevant in urban environments with strict environmental regulations. Reduced noise levels also contribute to minimizing disruption in residential areas. In addition, electric motors offer higher efficiency and lower operating costs compared to diesel engines, supporting long-term project economics. The combination of precision, reduced environmental impact, and operational efficiency positions electric drilling as a viable option for future infrastructure developments. Edited by Natania Lyngdoh, Induportals Editor — Adapted by AI. www.epiroc.com Powered by Induportals Media Publishing