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Geochemical Characteristics of Rocks in Coal Mines (Case Study of Coal Mining PT. ABC): Karakteristik Geokimia Batuan Pada Tambang Batubara (Studi Kasus Penambangan Batubara PT. ABC) Pratama, Gindang Rain; Pradani, Diana Irmawati; Jayaputra, Harsalim Aimunandar; Gautama, Gregorius Aryoko; Aditya, Muhammad Tri; Naibaho, Armin
Media Ilmiah Teknik Lingkungan (MITL) Vol. 10 No. 2 (2025): Media Ilmiah Teknik Lingkungan (MITL)
Publisher : Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mitl.v10i2.10460

At the end of mining, an open pit coal mine will form a mine sump, also known as a “pit lake”. At PT ABC, the pit wall rock lithology consists of 30% potentially acidic rock and 70% non-acidic rock, with low pH sump water quality. The static test is intended to calculate the balance of acid-forming and acid-consuming components. The static test does not consider the rate of acid formation and neutralization. The objective is to determine the potential for acid formation to occur in the rock. The kinetic test aims to understand the kinetics of acid formation reactions in samples through a simulation of oxidation reactions in rocks. This test can predict long-term weathering characteristics as a function of time. Of the 4 rock samples tested statically, all samples showed PAF (Potencial Acid Forming) screening criteria. The results of the kinetic test showed that sample S1 experienced an increase in pH to 4,43, sample S2 experienced a decrease in pH to 8,03, sample S3 experienced an increase in pH to 2,44, and sample S4 experienced an increase to 7,24.

Assessing the Impact of Mesh Density on Safety Factor in 2D and 3D Finite Element Modeling: A Case Study of Landslide Mitigation with Corrugated Concrete Sheet Pile (CCSP) Rahmawati Cupasindy, Dyah Ayu; Sholeh, Moch.; Asema, Fuji; Anggraini, Novita; Susilo, Helik; Aditya, Muhammad Tri
West Science Nature and Technology Vol. 3 No. 03 (2025): West Science Nature and Technology
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsnt.v3i03.2284

The problem of landslides in irrigation canal embankments often occurs in areas with soft and expansive soils that have low bearing capacity and are easily changed in volume due to fluctuations in water content. One of the main triggers is the rapid drawdown phenomenon that causes a sudden decrease in slope stability. In this study, slope stability analysis was conducted using the finite element method with PLAXIS 2D and PLAXIS 3D software. The main objective of the study was to evaluate the effect of mesh variation and soil model selection between Mohr-Coulomb Undrained A and Hardening Soil on Safety Factor (SF) value and slope settlement pattern. The reinforcement treatment analyzed was the use of Corrugated Concrete Sheet Pile (CCSP) installed on the side of the slope to improve stability. The results showed that the mesh variation affected the SF results and stress distribution patterns, especially in the 3D model. The Hardening Soil model produced more realistic deformation and SF predictions than the Mohr-Coulomb model. Thus, choosing the right soil model and mesh configuration is very influential in producing accurate analysis and can be used as a reference in the design of irrigation canal slope treatment.

Technical Guidance On Groundwater Identification To Overcome Drought In Tanamerah Village, Saronggi, Sumenep, East Java. Gautama, Gregorius Aryoko; Jayaputra, Harsalim Aimunandar; Aditya, Muhammad Tri; Novianto, Dandung; Rahardjo, Bobby Asukmajaya; Pungarto, Irwanda Yuni
West Science Interdisciplinary Studies Vol. 3 No. 10 (2025): West Science Interdisciplinary Studies
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsis.v3i10.2286

Tanamerah Village is one of fourteen villages in Saronggi District, Sumenep Regency, East Java. Villagers experience water difficulties during both the rainy season and the dry season. Technical guidance will be carried out for groundwater identification to find out where the groundwater points are located that are able to meet the community's water needs. The method used for identification makes six tracks with varying distances between tracks. The length of each passage is twelve meters, and the depth of each passage is three hundred meters. Identification was carried out on village treasury land with an area of 500 m2. Six tracks in this service, the distance between tracks is 5-8 m, and the length of each track is 12 m. Track 1 was obtained from groundwater at a depth of 80m, and track 2 was obtained from groundwater at a depth of 80 m. Track 3 was obtained from groundwater at a depth of 70 m, and track 4 was obtained from groundwater at a depth of 20 m. Passage 5 is obtained from groundwater at a depth of 20 m, and passage 6 is obtained from groundwater at a depth of 70 m. Recommended drilling point is located on the TM1 line at point 8 with a depth of 80 m.

Technical Guidance On Groundwater Identification To Overcome Drought In Tanamerah Village, Saronggi, Sumenep, East Java. Gautama, Gregorius Aryoko; Jayaputra, Harsalim Aimunandar; Aditya, Muhammad Tri; Novianto, Dandung; Rahardjo, Bobby Asukmajaya; Pungarto, Irwanda Yuni
West Science Interdisciplinary Studies Vol. 3 No. 10 (2025): West Science Interdisciplinary Studies
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsis.v3i10.2286

Tanamerah Village is one of fourteen villages in Saronggi District, Sumenep Regency, East Java. Villagers experience water difficulties during both the rainy season and the dry season. Technical guidance will be carried out for groundwater identification to find out where the groundwater points are located that are able to meet the community's water needs. The method used for identification makes six tracks with varying distances between tracks. The length of each passage is twelve meters, and the depth of each passage is three hundred meters. Identification was carried out on village treasury land with an area of 500 m2. Six tracks in this service, the distance between tracks is 5-8 m, and the length of each track is 12 m. Track 1 was obtained from groundwater at a depth of 80m, and track 2 was obtained from groundwater at a depth of 80 m. Track 3 was obtained from groundwater at a depth of 70 m, and track 4 was obtained from groundwater at a depth of 20 m. Passage 5 is obtained from groundwater at a depth of 20 m, and passage 6 is obtained from groundwater at a depth of 70 m. Recommended drilling point is located on the TM1 line at point 8 with a depth of 80 m.

Analysis of Decreased Limestone Production on the Effect of Rainfall with the Linear Regression Method Aditya, Muhammad Tri; Susilo, Helik; Fanani, Yazid
West Science Interdisciplinary Studies Vol. 1 No. 10 (2023): West Science Interdisciplinary Studies
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsis.v1i10.334

Limestone mining is a quarry system mining . Its production is influenced by weather factors, especially rainfall. This study aimed at determining the mathematical model wich is able to correlate the influence of rainfall on production of limestone. In addition, it analyzed the correlation between rainfall and limestone production using linear regression method. There are four important steps in this research. The first step is to collect data production and production factors. The second step is to process the data into a mathematical model using linear regression. The third step is to test the result of the mathematical model with the statistical test method. Then the fourth step is to analyze the mathematical model that has met the statistical test results. The results showed that the best mathematical model was: Log P = 0.502 x LOG((JO X Pr) 1.99 x (CH)-0.001) + 0.0002. In conclusion, the effect of rainfall toward the production derivation was very low. Besides, operation hours and productivity also affected production derivation.

Evaluation of Production Capability of Transportation Equipment and Loading Equipment in Limestone Mining at PT X, South Sulawesi Aditya, Muhammad Tri; Arystianto, Deni Putra; Jayaputra, Harsalim Aimunandar; Susilo, Helik; Pratama, Gindang Rain
West Science Interdisciplinary Studies Vol. 2 No. 12 (2024): West Science Interdisciplinary Studies
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsis.v2i12.1505

This study focuses on the evaluation of the production capacity of loading and hauling equipment in limestone mining operations at PT. X, South Sulawesi Province. The selection of this topic is based on the importance of operational efficiency in limestone mining which has a direct impact on the productivity and sustainability of the cement industry. The main objectives of this study are to determine the actual production of loading and hauling equipment, determine the number of equipment needed to meet production targets and identify compatibility factors between mechanical equipment at the mining site. The methods used include field data collection involving measurement of cycle time and production capacity of loading and hauling equipment. The data obtained are then processed using statistical methods to ensure the accuracy of the results. Data analysis is carried out by considering variables such as work efficiency, cycle time, and equipment capacity. The results show that Kobelco SK 480 LC has the highest production capacity (509.34 tons/hour), followed by Komatsu PC 400 (448.25 tons/hour) and PC 300 (417.05 tons/hour). To achieve the Crusher production target of 1450 tons/hour, a combination of loading equipment and dump trucks with a compatibility factor between 0.87 and 0.92 is required, indicating potential for increased efficiency. It is recommended to improve maintenance of equipment and mining roads to optimize productivity.

Analysis of Decreased Limestone Production on the Effect of Rainfall with the Linear Regression Method Aditya, Muhammad Tri; Susilo, Helik; Fanani, Yazid
West Science Interdisciplinary Studies Vol. 1 No. 10 (2023): West Science Interdisciplinary Studies
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsis.v1i10.334

Limestone mining is a quarry system mining . Its production is influenced by weather factors, especially rainfall. This study aimed at determining the mathematical model wich is able to correlate the influence of rainfall on production of limestone. In addition, it analyzed the correlation between rainfall and limestone production using linear regression method. There are four important steps in this research. The first step is to collect data production and production factors. The second step is to process the data into a mathematical model using linear regression. The third step is to test the result of the mathematical model with the statistical test method. Then the fourth step is to analyze the mathematical model that has met the statistical test results. The results showed that the best mathematical model was: Log P = 0.502 x LOG((JO X Pr) 1.99 x (CH)-0.001) + 0.0002. In conclusion, the effect of rainfall toward the production derivation was very low. Besides, operation hours and productivity also affected production derivation.

Evaluation of Production Capability of Transportation Equipment and Loading Equipment in Limestone Mining at PT X, South Sulawesi Aditya, Muhammad Tri; Arystianto, Deni Putra; Jayaputra, Harsalim Aimunandar; Susilo, Helik; Pratama, Gindang Rain
West Science Interdisciplinary Studies Vol. 2 No. 12 (2024): West Science Interdisciplinary Studies
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/wsis.v2i12.1505

This study focuses on the evaluation of the production capacity of loading and hauling equipment in limestone mining operations at PT. X, South Sulawesi Province. The selection of this topic is based on the importance of operational efficiency in limestone mining which has a direct impact on the productivity and sustainability of the cement industry. The main objectives of this study are to determine the actual production of loading and hauling equipment, determine the number of equipment needed to meet production targets and identify compatibility factors between mechanical equipment at the mining site. The methods used include field data collection involving measurement of cycle time and production capacity of loading and hauling equipment. The data obtained are then processed using statistical methods to ensure the accuracy of the results. Data analysis is carried out by considering variables such as work efficiency, cycle time, and equipment capacity. The results show that Kobelco SK 480 LC has the highest production capacity (509.34 tons/hour), followed by Komatsu PC 400 (448.25 tons/hour) and PC 300 (417.05 tons/hour). To achieve the Crusher production target of 1450 tons/hour, a combination of loading equipment and dump trucks with a compatibility factor between 0.87 and 0.92 is required, indicating potential for increased efficiency. It is recommended to improve maintenance of equipment and mining roads to optimize productivity.

Pengujian Kualitas Air Bor sebagai Upaya Meningkatkan Kualitas Hidup Masyarakat di Kelurahan Sidorahayu, Malang: Groundwater Quality Testing to Enhance the Quality of Life of Communities in Sidorahayu Subdistrict, Malang Regency Jayaputra, Harsalim Aimunandar; Pratama , Gindang Rain; Pradani, Diana Irmawati; Aditya, Muhammad Tri; Arystianto, Deni Putra; Susilo, Helik
Jurnal Pengabdian pada Masyarakat Ilmu Pengetahuan dan Teknologi Terintegrasi Vol. 10 No. 1 (2025): December
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jindeks.v10i1.9130

Kualitas air bersih merupakan faktor penting dalam mendukung kesehatan masyarakat, terutama di kawasan perumahan padat penduduk. Penelitian dan program ini bertujuan untuk menguji serta meningkatkan kualitas air bor di Kelurahan Sidorahayu, Kecamatan Wagir, Kabupaten Malang, guna memastikan kesesuaiannya dengan standar baku mutu air untuk keperluan higiene dan sanitasi. Kegiatan dilakukan melalui tiga tahapan utama, yaitu persiapan, pelaksanaan, dan evaluasi. Pengujian air dilakukan pada beberapa titik sumur bor yang dipilih secara representatif dengan parameter meliputi pH, Total Dissolved Solids (TDS), konduktivitas, Oxidation Reduction Potential (ORP), dan suhu, kemudian dibandingkan dengan ketentuan Permenkes No. 2 Tahun 2023. Hasil menunjukkan nilai pH 8,19–8,25 masih dalam batas aman meskipun cenderung basa, TDS 119–137 ppm, dan konduktivitas 114–131 µS/cm yang menandakan kualitas air relatif baik untuk keperluan nonkonsumsi. Namun, nilai ORP negatif menunjukkan kondisi reduktif yang berpotensi memengaruhi aspek mikrobiologis, sehingga diperlukan uji lanjutan terhadap Escherichia coli dan Total Coliform. Berdasarkan hasil tersebut, direkomendasikan langkah teknis seperti pemasangan filter sederhana, perebusan air, serta peningkatan kesadaran masyarakat terhadap kebersihan lingkungan dan pengelolaan limbah. Program ini menunjukkan bahwa kolaborasi antara masyarakat, perguruan tinggi, dan pemerintah daerah mampu mendukung pengelolaan air bersih yang berkelanjutan.

Technological Advancements and Implementation Barriers in Clean Coal Utilization: A Systematic Review with Indonesian Case Insights Muhammad Tri Aditya; Gunawan, Fajar Bagus
Journal of Collaborative Industrial Management (JCIM) Vol. 1 No. 4 (2025): Journal of Collaborative Industrial Management
Publisher : Publika Bersama Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar

Coal still plays a major role in Indonesia's energy mix, accounting for approximately 40% of the national primary energy mix in 2024., while low-emission technologies are becoming dominant in the world. In this study, a Systematic Literature Review (SLR) was performed to conduct an evaluation of technological developments and implementation challenges on the clean coal utilization which include gasification, clean combustion systems, activated carbon production and valorization of coal residues (fly ash and bottom ash) from both international view as well as Indonesian perspective. All international and national peer-reviewed articles (published between 2014–2024) were reviewed to analyze trends, gaps, and technical readiness. It is found that coal gasification technology provides the highest energy conversion efficiency of up to nearly 75%, and can cut carbon emissions by 40–60% in comparison to traditional combustion. On the other hand, fly ash and bottom ash utilization of for example 20 million tonnes per year could save up to around Indonesia’s coal power waste generation as well as support circular economy goals. There are still barriers to the adoption of this technology such as high investment costs ($1.2–1.5 million/MW), medium moisture in low rank coal (>30%) and small-scale pilot projects at industrial level. Lessons learnt This article reiterates that R&D needs the backing of fiscal incentives, demo plants and regulatory frameworks to hasten the sustainable deployment of CCTs in Indonesia

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