Call To Action
With the commitment of providing you greater flexibility and convenience,
if you have a suggestion for improvement, a complaint or compliment,
we are providing you ways to contact Geomine.
Who We Are
About
GEOMINE Consultant is a mining and geotechnical consulting firm with primary focuses of providing good technical services in all phases of the mining cycles and assisting professional development of client's technical personnel.
Works
GEOMINE work is in open pit and underground mining with a broad range of commodities (gold, silver, copper, iron, nickel, coal). This covers various ranges of services for our clients.
Team
GEOMINE is currently staffed by engineers who have extensive experiences in mining industry, nationally and internationally. These experiences will help to give our client not only realistic and achievable solution but also world standard products. Additional staff will be recruited over time with focus on technical excellence and the effective transfer of knowledge to the mines. We recognize the important role of mine site personnel in achieving our objectives of empowering the mines to improve productivity and safety.
Mission
GEOMINE mission is to provide satisfactory and profitable services of mining, by applying professionalism, good mining practices and appropriate environmental management.
Our Services

Mining Project Evaluation
- Feasibility Studies and Project Management - Conceptual and Bankable Studies.
- Feasibility Studies Compiling and Assistance.

Geology, Resources and Exploration Services
- Resource Modelling and Estimation (KCMI/JORC).

Mining Services
- Open Pit Mine Planning, Design, and Scheduling.
- Underground Mine Planning, Design, and Scheduling.
- Reserve Estimation (KCMI/JORC).
- Foundation Evaluation for Mine Facilities/Infrastructures.
- Selection and Design of Mining Strategies/Layouts.

Geotechnical Services
- Open Pit Slope Stability Evaluation.
- Waste Dump / Tailing Dam Stability Evaluation.
- Underground Mining Method Evaluation.
- Underground Stability Evaluation and Improvement.
- Site Investigation and Geotechnical Characterisation.
- Geotechnical Design and Instrumentation.
- Geotechnical Training.

Water Management Services
- Surface Water Engineering
- Groundwater Management and Hydrogeological Evaluation

Mining Related Environmental Services
- Environmental Program and Monitoring

Mine Plan and Geotechnical Training
- Mining Reserves Estimation
- Mine Planning for Open Pit
- Mine Planning for Underground
- Geotechnical Training for Open Pit
- Geotechnical Training for Underground
Our Experiences

PT. Freeport Indonesia, Gold & Copper (Papua, Indonesia)
- Geotechnical Study (2008-2020)
- Underground inspections to conveyor level, recommending ground control monitoring and secondary support installation.
- Wetmuck audits and studies including performing as technical expert for studies done by University of British Columbia.
- Environmental Audit (2012-2020)

PT. Nusa Halmahera Minerals, Gold (Maluku, Indonesia)
- Tailing Mining Study (2020)
- Geotechnical Study (2016-2018)
- Hydrological Study (2016)
- Technical Training (2017-2018)

PT. Bumi Suksesindo, Gold & Copper (Jawa Timur, Indonesia)
- Geotechnical Study (2019-2020)
- Geotechnical Data Collection.
- Geotechnical core logging secondment, training and supervision.
- Geotechnical core logging procedure manual.
- Geotechnical sampling.
- Geological and Geotechnical Structures Identification including Fault interpretations.
- Geotechnical Data Collection.
- Technical / Mining Study on various issues related with Porphyry Project (2019-2020)

PT. Kapuas Prima Coal, Tbk, Galena (Kalimantan Tengah, Indonesia)
- Geotechnical Study (2017)
- Geotechnical management and reviews.
- Data collection and database management.
- Site inspection for the quarterly geotechnical inspections.
- Hydrology and Hydrogeological Study (2017 and 2020) including
- Numerical modelling.
- Open cut groundwater control, dewatering, depressurisation and drainage.
- Seepage analysis and management.
- Assessment of groundwater components in slope stability.
- Groundwater modelling for open cut and underground situations.
- Hydrogeological installations and testing including pumping test and hydraulic test analysis.
- Water balance assessment.
- KCMI Reserve Statement Report (2018, 2020)
- JORC Resource and Reserve Statement Report (2018, 2020)

PT. Cikondang Kancana Prima, Gold (Jawa, Indonesia)
- Geotechnical Study (2019)

PT. Antam Tbk, Gold & Copper (Jakarta dan Site, Indonesia)
- Peer Review Resource and Reserve Statement 2019 (Cibaliung, Pongkor, Arinem/Papandayan) (2020)
- Training (2008-2009, 2012, 2020)
- Mining Study (2010-2012)

PT. Natarang Mining, Gold (Lampung, Indonesia)
- Geotechnical Study (2015-2016)
- Feasibility Study (2014)

PT. Sumber Energi Jaya, Gold (Sulawesi Utara, Indonesia)
- KCMI Reserve Statement Report (2017-2018)
- Feasibilty Study (2017-2018)
- Geotechnical Study (2017)

PT. Indo Muro Kencana, Gold (Kalimantan Tengah, Indonesia)
- Review Underground Mining Study (2019-2020)

BHP Nickel West - Cliffs Mine/Mount Keith, Nickel (Australia)
- Contract Geotechnical Engineer for Stability Inspection and Monitoring (2017)

St Barbara – Deep Gwalia Mine, Gold (Australia)
- Contract Geotechnical Engineer for Stability Inspection and Monitoring (2018)

PT. Multi Harapan Utama, Coal (Kalimantan Timur, Indonesia)
- Geotechnical Study (2015-2016)
- Geotechnical work for pre-feasibility study (4 mines).
- Geotechnical investigations including geotechnical logging, sampling, and testing.
- Excavatability/digability assessment.
- Slope stability assessment.

PT. Gag Nikel, Nickel (Maluku, Indonesia)
- Geotechnical Study (2012)
- Geotechnical site investigation, drill rig supervision, program planning, geotechnical data analysis.
- Geotechnical investigations including geotechnical logging, sampling, and testing.
- Stability assessments, modelling and analysis for pit and waste dumps.

PT. Antam Tbk, Bauxite Mempawah (Kalimantan Barat, Indonesia)
In collaboration with PT Ernst & Young Indonesia
- Cost and Mine Optimization Review for Bauxite Mines supporting Smelter Grade Alumina (2020)

PT. Kalimantan Surya Kencana, Copper (Kalimantan Tengah, Indonesia)
- KCMI Reserve Statement Report (2017)
- Due diligence geotechnical review and Optimizing Pit Study (2017-2018)
- Feasibility Study (2017-2018)

PT G-Resources Martabe, Gold (Sumatera Utara, Indonesia)
- Feasibilty Study (2014)

PT. Kenda Resources International, Gold (Sulawesi Utara, Indonesia)
- Due Diligence for Mine KYL (2018-2019)

PT. Toba Bara Sejahtera, Coal (Kalimantan Timur, Indonesia)
- Production Planning Review (2017)
- Cost and Financial Model Review (2017)

PT. Kaltim Prima Coal, Coal (Kalimantan Timur, Indonesia)
- Geotechnical Training (2014)

PT. Arutmin Indonesia, Coal (Kalimantan Selatan, Indonesia)
- Geotechnical Training (2018)

Bank Mandiri Tbk (Jakarta, Indonesia)
- Training Mining for Non Miner (2017)
- Due Diligence for Mine ABC, Indonesia (2017)
- Due Diligence for Mine DEF, Indonesia (2018)
- Due Diligence for Mine GHI, Australia (2018)

PT. J-Resources, Gold (Sulawesi Utara, Indonesia)
- Geotechnical Study (2010-2012)
- Geotechnical work for Lanut mine, Bakan mine, and Seruyung mine.
- Feasibility Study (2010-2012)
- Feasibility Study for Lanut mine, Bakan mine, and Seruyung mine.

KJPP Ruky, Safrudin & Rekan (Jakarta, Indonesia)
- Due Diligence for Mine XYZ Indonesia (2016)
- Due Diligence for Mine STU Indonesia (2017)
- Valuation for Mine KLM Indonesia (2019)

PT Bina Insan Sukses Mandiri (Jakarta, Indonesia)
- Review dan Operation Excellence (2017)

PT. Kasongan Bumi Kencana, Gold (Kalimantan Tengah, Indonesia)
- Geotechnical Study (2016)
- Training (2016)
- Feasibility Study (2012-2014)

PT. Emas Mineral Murni, Gold and Copper (Aceh, Indonesia)
- Reserve Statement Report (KCMI) (2017)
- Feasibility Study (2016-2017)

PT. Alexis Perdana Mineral – Rajawali Group, Gold (Jawa Timur, Indonesia)
- Reserve Statement Report (KCMI) (2015-2016)
- Feasibility Study (2015-2016)

PT. Batutua Way Kanan Mineral, Gold (Lampung, Indonesia)
- KCMI Reserve Statement Report (2018 and 2020)
- Feasibilty Study (2018-2019)
- Geotechnical Infrastructure Study (2018-2019)

PT. Jelai Cahaya Mineral, Gold (Kalimantan Timur, Indonesia)
- KCMI Reserve Statement Report (2019)
- Feasibility Study (2018-2019)

PT. Tambang Mas Sangihe, Gold (Sulawesi Utara, Indonesia)
- Feasibility Study (2017-2018)

PT. Batutua Kharisma Permai, Copper (Lampung, Indonesia)
- Geotechnical dan Hydrological Study (2019)
- Waste Dump dan Embankment Study (2020)

PT. Bara Anugrah Sejahtera, Coal (Sumatera Selatan, Indonesia)
- Geotechnical and Highwall Slope Failure Study (2016)
- Investigation of slope failures.
- Slope stability / sensitivity analysis using Limit equilibrium modelling.
- Highwall and spoil pile stability analysis and redesign.
- Regular geotechnical reviews.
- Geotechnical and Disposal Slope Failure Study (2019)

PT. Banjar Sari Pribumi, Coal (Sumatera Selatan, Indonesia)
- Geotechnical Study and Disposal Slope Failure Study (2019)
- Geotechnical investigation of a spoil dump failure, highlighting operational practices that contributed to the failure which assisted the mine in preventing re-occurrence.
- Slope stability / sensitivity analysis using Limit equilibrium modelling.
- Regular geotechnical reviews.
Our Team
Take a closer look into our amazing team.

Lufi I. Rachmad
Principal GEOMINEMaster of Engineering (Mining), Colorado School of Mines, USA, 1997
Sarjana Teknik Pertambangan, Cum Laude, Institut Teknologi Bandung, Indonesia, 1996
Lufi has 23-year experiences in geotechnical, mine design, mine operation and mine management. He was graduated from Institut Teknologi Bandung majoring in Mining Engineering in 1996 and earned his master degree from Colorado School of Mines (CSM) in 1997.
Starting his career in PT Freeport Indonesia as Senior Geotechnical Engineer, Lufi had been successfully expanding his responsibilities to be Superintendent Geotechnical in 2000. In this position Lufi was responsible for all geotechnical aspects, ground control, and geotechnical section management for three active mines with total production around 50,000 tonnes per day, for studies of two future mines and for Common Infrastructures.
In 2003, Lufi was promoted to be Project Manager Strategic Planning at Freeport McMoran Copper and Gold (FCX) Head Office in New Orleans, USA. In this capacity, Lufi was responsible for Freeport’s strategic planning that managed long term studies and special projects of the FCX mines and reported to the Director. He was the Project Manager for DOZ 50k and 80k Expansion Studies, MLZ and Deep MLZ Pre-Feasibility Studies. He was also part of International Caving Study team consisting world-wide known experts in block caving with the goal of publishing the Caving HandBook.
In 2007 Lufi decided to change his professional career, returned to Indonesia and established a consultant company named GEOMINE Mining and Geotechnical Consultant. In the middle of managing his consulting company, in 2013, Lufi served as Operational Director for Baramulti Group, a public national coal mining company. He held this position until year 2015 when he decided to continue pursuing his full career in consulting. He earned KCMI Competent Person for gold dmp commodity in 2016, base metal in 2017, and JORC Competent Person in 2018. He has been actively involved in PERHAPI (Perhimpunan Ahli Pertambangan Indonesia) as well as KCMI (Komite Cadangan Mineral Indonesia). Recently, he was appointed to be the Indonesian representative for CRIRSCO (Committee for Mineral Reserves International Reporting Standards). He has published more than tens of papers that were posted in International publications.

Fourmarch Sinaga
Senior Mining and Geotech Engineer GEOMINEMagister Manajemen, Universitas Mercu Buana, 2022 (expected)
Sarjana Teknik Pertambangan, Universitas Pembangunan Nasional, Indonesia, 1999
Fourmarch Sinaga is a Mining Engineer with 21-year experiences in the mining industry both technical and operational including mining management. During his career, he has been involved in the mid-tier to large mining project and operations mostly in underground mines (copper, coal, nickel) with specialization in geotechnical, and he also spent over 7 years on surface coal mines operations.
Fourmarch started his professional career with PT Freeport Indonesia in Papua from year 2000 to year 2008 in various areas such as underground geotechnical, tunneling, project control and mine ventilation. His roles during his services with PT Freeport Indonesia as Chief Geotechnical Engineer, Chief Tunnel Engineer and Superintendent Project Ventilation. Previously, he worked with PT Dialia Setyamukti (mining contractor) from year 1999 to year 2000 as Production Engineer.
In early 2008, Fourmarch moved to Norilsk Nickel in Western Australia and later on to Cadia Mine, Newcrest Mining Limited in Orange, NSW, Australia. He worked with Newcrest from Jun 2008 to Jan 2012 as Senior Geotechnical Engineer for Cadia East Block Caving Project.
In early 2012, Fourmarch accepted a new role as a Senior Geotechnical Engineer for Xstrata Ulan Underground Coal Mine, based in NSW, Australia, a longwall mine with production of 4 Mtpa. One of his key responsibilities is to review and update Strata Failure Management Plan that must align with Australia Coal Mine Health and Safety Regulation.
In May 2013, Fourmarch returned to Indonesia and joined with PT Sumber Kurnia Buana (a subsidiary of Baramulti Group, one of national coal mining company). He looked after the feasibility study of underground coal as Project Manager Study. Starting April 2015, Fourmarch served as Operations Director for the company where his role is to direct and oversee all operational aspects of surface mining operations. In Dec 2020, he ceased the company.

Yusuf Iskandar
Senior Mining Engineer GEOMINESarjana Teknik Pertambangan, Universitas Pembangunan Nasional, Indonesia
Yusuf has over 30 years extensive experience in mining industry especially in various aspects of underground mining operation.
Started in 1988, Yusuf worked in PT Lusang Mining (under Billiton Group and then accused by Shell Company), an underground gold mining located in Bengkulu province. During seven years, Yusuf involved in mine operation, mine plan, and safety & quality, and was in-charge for chief of underground Mine Rescue Team and Deputy Mine Manager (Wakil Kepala Teknik).
In 1995, Yusuf started work in PT Freeport Indonesia in Papua. In almost 10 years Yusuf was responsible for surface and underground technical services, including temporary assignment for underground strategic long-term plan in New Orleans office, USA.
In 2005, Yusuf decided to work as an independent consultant for mining and geology, and during this period, he developed his owned business as an entrepreneur.
In 2012, Yusuf was appointed to be Operational Director of PT Lintas Multi Benua, an investment and mining services company until 2015.
He joined GEOMINE in 2015. He has played an important role in preparing government feasibility study document for Alexis Prima Mineral, Emas Mineral Murni, Kalimantan Surya Kencana, Kapuas Prima Coal, and Sumber Energi Jaya.

Dadang Aryanda
Mining and Geotech Engineer GEOMINEMagister Teknik Pertambangan (Geoteknik), Cum Laude, Institut Teknologi Bandung, Indonesia
Sarjana Teknik Pertambangan, Universitas Hasanuddin, Indonesia
Dadang has over 8-year experiences in the mining industry. His past working experiences was with PT Jayakhisma Globe Indonesia, a coal mining in Kutai Timur, and with PT Aneka Tambang Tbk – nickel mining in Pomalaa, both are as Mining Engineer. He obtained a Bachelor degree in Mining Engineering Department at Universitas Hasanuddin and Master degree in Geotechnical Engineering Department at Institut Teknologi Bandung (Cum Laude). His thesis title is “Prediction of Geomechanical Parameter using Adaptive Neuro Fuzzy Inference Systems (ANFIS) and Multiple Regression Analysis (MRA) method”.
In his current capacity, he has involved in data collection, analysis, and report preparation for several feasibility study reports, KCMI reserve reports, and geotechnical studies reports (Arutmin, Bara Anugerah Sejahtera, Banjarsari Pribumi, Batutua Waykanan Minerals, Batutua Kharisma Permai, Bumi Suksesindo, Cikondang Kencana Prima, Citra Palu Minerals, Indo Muro Kencana, Jelai Cahaya Minerals, Kapuas Prima Coal, Kalimantan Surya Kencana, Nusa Halmahera Minerals, Sumber Energi Jaya). He is an advanced user of Mining and Geotechnical software such as Surpac, MineSched, Micromine, Slide, Phase2.
Our Clients
Our Contact
With the commitment of providing you greater flexibility and convenience,
if you have a suggestion for improvement, a complaint or compliment,
we are providing you ways to contact Geomine.
Location:
Jl. Kapatihan No. 21 Lantai 2
Bandung - 40251, Indonesia
eMail:
admin@geomine-indonesia.com
L_rachmad@geomine-indonesia.com
Phone:
+62 813 207 89773