Journal of Mining Insight

Analisis Perbandingan Kadar Nikel (Ni) dan Besi (Fe) pada Lokasi Pengeboran dan Lokasi Penambangan PT. Almharig Mineral Provinsi Sulawesi Tenggara

2025-03-19T12:41:00+00:00

One of the obstacles in nickel mining is the change in nickel (Ni) and iron (Fe) content from drilling data that does not match the content at the mining location. The study aims to determine the percentage change in nickel (Ni) and iron (Fe) content from drilling data with the mining location. The research method includes processing samples from drilling results and results at the mining location in the laboratory to determine the comparison of content. The next stage is processing and analyzing content data to determine the average nickel and iron content. The results of the identification of drill point data produced an average content of Ni = 1.90% and Fe = 22.86%. While the average content at the mining location is Ni = 1.86% and Fe = 20.55%. Furthermore, the difference in content at the drilling location and at the mining location can be seen, namely Ni = 0.04% and Fe = 2.31%. From the research results, it can be concluded that the levels of identification results at the drilling location have different levels compared to those at the mining location, where the percentage comparison of nickel levels is 0.04% while iron is 2.31%.

Evaluasi Jalan Angkut untuk Produksi Penambangan Area Pit 6 B Pada PT Jhonlin Baratama Kalimantan

2025-03-14T02:14:07+00:00

Road access is an important factor in the achievement of coal and OB transport targets. Therefore, transport activities must be accompanied by road conditions that are suitable to be used as production routes in accordance with the standards adopted by Bina marga and AASTHO. The purpose of this study is to determine the geometry of mining road and the supporting factor of smoothness and safety at PT. Jhonlin Baratama. The data used in this study are data of road haul road, radius and superelevation, cross slope and road slope. After this data is obtained then processed using software Minescape 5.7 to obtain the count of road length, road width, and elevation. MS Software. Excel to know the evaluation data of high difference, road grade, cross slope, radius and superelevation. Processed data were analyzed based on standards of Bina marga and international AASTHO to determine the feasibility of road geometry. From the results of study that has been done, it is known that the existing haul road already meets the minimum width requirement for a straight road that is 9 m for Hino 320 and 19 m for HD465-7. On the two-lane haul road and on the bend, for Hino 320 already meets the minimum width standard whereas for HD 465-7 it is necessary to add the width of the bend in segment C, F, G, H and I the width addition is intended to prevent dump truck waiting when passed. There are also some road segments whose slope exceeds the standard, which is 8% and does not have a cross slope that has the potential to cause puddles.

Perancangan Sequence Triwulan Ketiga Penambangan Batubara pada PT Garda Tujuh Buana Tbk Provinsi Kalimantan Utara

2025-03-19T01:11:13+00:00

Mine design facilitates the achievement of the desired production target and provides an overview of the mining progress plan for a period of time. The purpose of this study is to determine the mining sequence design and production scheduling obtained by using data processing software and mine planning software, namely minescape software used for pit design design. The pit design is based on the results of geometric analysis, assuming that the mine is theoretically free from landslides with a slope height of 10 m, a slope width of 5 m, and a slope inclination of 45°. The area of the pit design in the third quarter is 26.76 hectares and the total coal amounted to 866,887.38 tons. For the third quarter production scheduling, for coal loading, 4 digging tools will be operated serving 43 loading tools with a total production of 284,939.12 tons with total working hours of 305.65 hours. So the estimated plan for 4 digging tools and 43 loading tools can meet the production target of the sequence design that has been made.

Analisis Karakterisitik Geokimia Batugamping Menggunakan Metode X-Ray Difraction dan X-Ray Fluorescence di Kabupaten Buton Selatan Sulawesi Tenggara

2025-03-13T03:15:12+00:00

Limestone is a sedimentary rock formed from calcium carbonate deposits and has a high content of calcium carbonate. It is used in the cement, fertilizer, glass, and construction industries. Research was conducted in the South Buton Regency, Southeast Sulawesi, using the geochimical methods of X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF). The aim of this study was to identify the minerals in limestone and analyze their geochemical characteristics. The research results showed the dominance of calcite minerals in the limestone of the area, with a high content of pure calcium carbonate (CaCO₃). The study also observed the presence of other elements in the limestone. The analysis indicated low levels of elements such as Mg, CaF₂, Ru₂O, Fe₂O₃, Ag₂O, and SrO. The XRD method was useful for mineral identification in limestone, while XRF analyzed the elemental content quantitatively. This research provides a deeper understanding of the mineral characteristics and composition of limestone in the South Buton Regency. This information is valuable for the development of the cement, fertilizer, glass, and construction industries. Additionally, the study also revealed the potential for other minerals in the limestone of the research area.

Analisa Pengaruh Batuan Asal Terhadap Profil Nikel Laterit Menggunakan Analisis XRF Dan Petrografi Di Daearah Kolaka Utara

2025-02-26T09:17:12+00:00

Nickel is one of the metals needed by humans. In general, nickel can be formed primarily or secondarily, known as nickel laterite. Nickel deposits in Indonesia are only found in the form of nickel laterite. The parent rock of nickel laterite deposits is ultrabasic rock, especially from the types of harzburgite, dunite, and other peridotites. The data collection technique used is to take data related to the research, both primary and secondary data. Primary data includes outcrop data (megascopic description) at the research location, exploration drill data to determine the thickness of the nickel laterite layer and the content of its elements and rock sample data for petrographic thin section analysis. Sampling was carried out in block A. While secondary data includes data on the general condition of the company, and a map of the research location. 1. The original rock analyzed petrographically is serpentinezed harzburgite. The minerals contained are orthopyroxene, olivine, clinopyroxene, and opaque minerals. The weathering level of the nickel laterite profile in the limonite zone is higher than the saprolite zone because in the saprolite zone most of the rocks are small in size and the original rocks affect the nickel laterite profile that is formed, but are still supported by other factors, namely topography, climate, geological structure, vegetation and time.