The application of the strip mine method at PT Dizamatra Powerindo altered the topography into a massive basin that functions as a catchment area, causing rainwater to flow directly and accumulate in the mine opening area. The DP pit 3 area is currently a void (mine lake) filled with water and mud, which is planned to be re-mined. The research method uses a quantitative approach through direct …
Limestone blasting activities at PT Semen Padang generally produced fragmentation that tended to fall within the fine to medium size category. The dominance of excessively fine fragments may increase dust generation and fine material loss, while also indicating inefficient utilization of blasting energy. This condition was influenced by the actual blasting geometry and rock mass conditions in t…
Limestone hauling activities at PT Semen Padang are affected by the haul road geometry from Front B to Limestone Crusher VI. This study aims to analyze haul road geometry, calculate cycle time and hauling equipment productivity, and provide improvement recommendations to increase the production achievement of Front B toward the estimated monthly target. The parameters analyzed using ArcMap 10.8…
South Sumatra coal has great potential as a fuel for coal-fired power plants (PLTU), but its quality variations require quality control efforts to meet operational specifications, one of which is through the coal blending process. This study aims to analyze the effect of variations in coal blending ratios on proximate parameters and to evaluate their suitability with the characteristics of MT-4…
This study aimed to analyze the relationship between vegetation canopy density and water management as indicators of reclamation success in a 26.09-ha post-mining area. Vegetation density was analyzed using the Normalized Difference Vegetation Index (NDVI), while water management conditions were assessed through infiltration rate, runoff coefficient, runoff discharge, and actual erosion rate. T…
PT Bukit Asam (Persero) Tbk implements a market brand system to maintain coal quality consistency in accordance with customer specifications. One of its products is BA-48 blended coal, which is produced through a coal blending process involving the mixing of different coal types to achieve the desired quality targets. In the blending process, product quality homogeneity is a critical factor as …
PT Priamanaya Energi is a coal mining company in South Sumatra Province that operates a disposal area spanning approximately 105 hectares. Most of this area consists of active disposal sites that lack adequate vegetation cover, making them vulnerable to erosion. High sedimentation levels in the North Settling Pond (KPL) and soil material carried by surface runoff out of the disposal area indica…
This study examines the effect of weather factors on inland tin production and offshore tin production at PT Timah Tbk across several quarterly periods. The data used in this study are secondary data consisting of rainfall, air humidity, air temperature, and wind speed variables observed periodically. The objectives of this study are to analyze the effect of weather factors on inland and offsho…
PT Bukit Asam (Persero) Tbk., manages a Mining Business License (IUP) covering an area of 40,347 hectares through the Tanjung Enim Mining Unit (UPTE), which encompasses four operational blocks: Banko Barat, Banko Tengah, Muara Tiga Besar, and Tambang Air Laya. This study was conducted at Pit 2, Banko Barat, at the Livestock Dump Hopper 4 (LSDH 4) unit, using an open-pit mining system that invol…
This research was conducted at the Pit Quarry of PT Bukit Asam (Persero) Tbk, specifically in the andesite mining area of Bukit Tapuan, with the objective of analyzing the influence of discontinuity plane orientation on the throw direction and fragmentation size distribution resulting from blasting activities. The research method included field observations using scanline mapping to obtain disc…
Tin mining is a major economic sector in Bangka Belitung and has shifted from land-based to offshore operations due to the declining availability of terrestrial reserves. Offshore mining activities using Kapal Keruk (KK), Kapal Isap Produksi (KIP), and Ponton Isap Produksi (PIP) have led to increased sedimentation and changes in water quality, necessitating an evaluation of marine environmental…
The hygroscopicity of biodiesel (B40) is a challenge in the processing of natural resources. This hygroscopicity significantly impacts quality degradation and combustion efficiency. Hygroscopicity is the property of a material to absorb or attract water vapor (humidity) from the surrounding air. Biodiesel contains ester groups (–COO–) that tend to form hydrogen bonds with water. These group…
A disposal area is an area where soil and overburden material are accumulated or piled up in an open-pit mining area. The more material removed, the larger the disposal area. PT Bukit Asam (PTBA) is one of the largest and oldest coal mines in South Sumatra. PTBA's disposal area at the Air Laya (TAL) mine is one of the largest dumps, extending up to 80 meters above the original ground. In 2017, …
Statistics on mining accidents resulting in serious injuries and fatalities in Indonesia show an upward trend every year, with a significant increase in 2022. In response, the Director General of Mineral and Coal Mining tightened safety regulations, stipulating that operational activities in a mining area must be suspended following a fatality until improvements are implemented. PT Semesta Alam…
The air table is a tool that utilizes gravity (gravity concentration) in the process of separating valuable minerals from it’s tailing based on differences in specific gravity, shape, and size with wind as a separating medium. This tool is in the form of a table that is mechanically driven by a driving machine and uses air / wind media generated by an air blower in the separation process. The…
Slope stability is an important factor in the sustainability of the mining process, a stable slope will reduce the potential for losses due to landslides. Analysis of the stability of backfilling slopes is considered very necessary, because landslides on backfilling slopes can cause quite large losses, both equipment loss and loss of life as well as lost opportunities. It is known that changes …
The loss of coal reserves in mining concession boundaries is commonly caused by conventional pit designs based on administrative limits, which create boundary pillars and result in stranded coal. This study aims to evaluate the technical and economic feasibility of implementing a sharing wall mining concept as a coal resource conservation strategy in the boundary area of PT Merapi Energy Coalâ€â€¦
Banyak faktor yang memengaruhi proses pengangkatan minyak ke permukaan, salah satu faktornya yaitu pemilihan ukuran tubing yang tepat untuk laju produksi optimal. Sumur X-097 dan X-017 di PT Pertamina Hulu Rokan Zona 4, Prabumulih Field menggunakan ukuran tubing 2,5 in(ID) di mana dengan menggunakan ukuran tubing tersebut laju produksi sumur X-097 sebesar 410 BFPD atau 34,83% dari laju produksi…
Penelitian ini bertujuan untuk simulasi dan eksperimentasi skala laboratorium terhadap proses pengecilan ukuran batuan kapur yang dilakukan pabrik semen untuk memenuhi target yang direncanakan dengan penggunaan energi yang efisien. Studi kasus dalam penelitian ini adalah batu kapur asal PT Semen Baturaja (Persero) dan pengambilan sampel dilakukan di area Blok 48 dan 55 secara grab sampling deng…
Ideal haul road geometry can support the smooth running of coal hauling activities. Coal hauling activities use hauling equipment in the form of dump trucks which increase the cost of mining activities from the fuel consumption used. PT Bara Selaras Resources uses PX105AT for the East Pit and Mercedes-Benz Axor 2528C for the West Pit. The actual fuel consumption used is greater than what has be…
PT Bara Energi Lestari adalah perusahaan pemilik konsesi lahan pertambangan batubara seluas 1.495 ha di Gampong Seumambek, Kabupaten Nagan Raya, Provinsi Aceh. Kegiatan pengupasan lapisan overburden (OB Removal) saat ini dikerjakan di Pit Utara seluas 13,77 ha dengan jenis material berupa claystone dengan berat jenis 2,3 ton/m3. Pekerjaan pencatatan loss time pada kegiatan OB Removal di PT Bara…
Buku ini membahas mengenai hukum pertambangan yang mencakup kebijakan pemerintah, kegiatan usaha minyak dan gas, tinjauan terhadap UU No. 4 tahun 2009, tinjauan kontrak hingga pajak dan royalti pada sektor minyak dan gas.
PT Baturona Adimulya merupakan perusahaan jasa industri pertambangan yang termasuk dalam anggota grup perusahaan PT Ucoal Sumberdaya. PT Baturona sedang mengerjakan salah satu proyek di Kecamatan Keluang, Babat Supat, Kabupaten Musi Banyuasin, Provinsi Sumatera Selatan. Aktivitas penambangan memerlukan sistem penyaliran agar tidak menganggu aktivitas produksi. Pada Pit 5 tumpang tindih antara s…
The ease of accessing information on the internet has led to the emergence of many online shopping platforms, resulting in an increasing number of online courier companies providing safe package delivery services to consumers. This poses a risk to couriers who spend their working hours on the highways. Therefore, good safety riding practices are necessary to minimize traffic accidents. The purp…
Oil is one of the most important energy sources for human life. One of the common causes of the decline in oil production is the decrease in pressure in reservoirs, because the primary energy used to lift oil to the surface will be reduced over time. TheHall Plot method is most often used to analyze the performance of an injection well bymaking a curve, between pressures multiplied by a certain…