Jakarta, November 20, 2025 — PT Sumbawa Timur Mining (STM) shared insights on the digitalization of mineral mining exploration for the Hu’u Project at the 34th Annual Professional Gathering (TPT) of the Indonesian Mining Professionals Association (PERHAPI). The event took place on November 10–12, 2025, in Palembang City, South Sumatra. This year, TPT PERHAPI carried the theme: “Digitalization and Transformation of Indonesian Mining Towards a Sustainable Green Economy.”
As a national forum for the mining sector, TPT PERHAPI brings together industry players, government, and academics to promote the development of mining that is more efficient, environmentally friendly, and sustainable. This year’s event featured 13 discussion subthemes covering mining technology, resource management, and mining policies. STM had the opportunity to present under the subtheme of digitalization in the mining industry.
STM’s Manager of Mineral & Geothermal Exploration, Galih Perdana, represented STM with a presentation titled “Utilization of Geological Data in the Hu’u Project: Digital-Based Exploration Transformation.” Other speakers in this session included Kenneze Santic (PT Arnoc Indonesia Energi), Ardhi Ishak K. (PT Pamapersada Nusantara), and the session was moderated by Rizal Kasli (PERHAPI Chairman for the 2018–2024 period).
In the discussion, Galih Perdana presented a case study on the application of digitalization in directional/branching drilling during the mineral exploration stage, using Continuous Wedging Tools (CWT). The implementation of this digital technology strengthens real-time drilling monitoring and improves accuracy and efficiency in the exploration process.
Directional/branching drilling is a technique where drilling is directed along a specific path, straight or curved, to reach mineralized zones. With this technique, a single main hole can branch out to several mineralization points simultaneously. Throughout the process, directional sensors are used to ensure the borehole follows the planned trajectory.
All drilling data is acquired and processed digitally to improve directional accuracy and optimize cost and time efficiency in exploration. “By implementing directional/branching drilling, STM achieved an average efficiency in 2022 that saved up to 25% of drilling time and 40% of drilling costs and related aspects,” said Galih.
Furthermore, Galih explained that digitalization in the Hu’u Project provides significant benefits, including centralized data integration for consistency and easy access, as well as more accurate 3D geological modeling through real-time integration of drilling and logging data. This approach enhances resource estimation quality and accelerates decision-making processes.
In addition to the benefits, Galih emphasized challenges that need to be anticipated. For instance, during the digital transition phase, changes in work culture and workforce training are required to ensure effective adoption of digital systems. Moreover, significant initial investment is needed for equipment such as servers, licenses, and system maintenance costs.
STM’s participation in TPT PERHAPI 2025 reflects the company’s active role in collaboration and innovation within the national mining sector. Through the use of digital technology, STM continues to promote effective and efficient exploration practices that contribute to the sustainable development of Indonesia’s mining industry.
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About PT Sumbawa Timur Mining
PT Sumbawa Timur Mining (STM) is a joint venture company between PT Aneka Tambang Tbk (20%) and Eastern Star Resources Pty Ltd (80%). STM manages the Hu’u Project, a copper exploration project operating under a 7th Generation Contract of Work (CoW) located in Hu’u Subdistrict, Dompu Regency, West Nusa Tenggara Province, Indonesia.
The CoW area also contains geothermal resources. To explore this potential, STM established its affiliate company, PT Sumbawa Timur Geothermal, which has received a Geothermal License (IPB) from the government. STM continues its journey toward realizing its vision of becoming a world-class copper mining operation powered by renewable energy.
For more information, please contact the STM Communications Team.
