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Suhardiman Gumanti, Suhardiman
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Astronomy Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences

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Analysis of Quicklime and Organic Chemical Coagulant Doses in Acid Mine Water Management at PT Lematang Coal Lestari (LCL), Gunung Raja, Muara Enim, South Sumatra Gumanti, Suhardiman; Nursani, Rodiyah
Jurnal Indonesia Sosial Teknologi Vol. 6 No. 3 (2025): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v6i3.8922

Abstract

Mine acid water (AAT) is one of the liquid wastes produced by coal mining activities. The existence of this liquid waste can hurt the environment, so it needs to be managed. This management aims to minimize the negative impact that will be caused. This study aims to determine the stages of AAT management and analyze the need for lime and chemical organic coagulants for coal mining at PT Lematang Coal Lestari (LCL). The method used in this study is by field observation, interview methods, and documentation as supporting data. The result of this study is that the stages of AAT management carried out by PT LCL are known, starting from AAT pumping, mixing chemical organic coagulant, measuring the pH of the inlet channel, liming the inlet channel, checking the color and pH of the outlet line water, mixing the chemical organic coagulant and liming the outlet channel if necessary, as well as settling. The lime dosage required by PT LCL is 0.32 gr/l, and the chemical organic coagulant requirement is 0.11 ml/l in one AAT water management.
Analisis Penggunaan Kapur Tohor (CAO) Untuk Pengelolaan Air Asam Tambang di Pt Lematang Coal Lestari (LCL) Gunung Raja Muara Enim Sari, Maresta; Gumanti, Suhardiman; Susilo, Aris
Blantika: Multidisciplinary Journal Vol. 3 No. 10 (2025): Special Issue
Publisher : PT. Publikasiku Academic Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57096/blantika.v3i10.428

Abstract

The occurrence of mine acid water cannot be left unchecked because it has a negative impact on the surrounding community and the environment, both directly and indirectly. Therefore, the prevention and management of mine acid water is carried out by settling and neutralizing mine acid water using Lime and Chemical Cationic Coagulant. The purpose of this study is to find out the process of mining acid water management using the active method used at PT LCL. The result of this study is to determine the stages of mining acid water management starting from AAT pumping, chemical cationic coagulant, inlet channel pH measurement, inlet channel liming, checking the color and pH of outlet channel water if needed, as well as sedimentation, and then if the pH is in accordance with the environmental quality standards, mine acid water can be flowed to the receiving water body of the Penimir River. The dosage of lime and Chemical Cationic Coagulant used varies, according to the condition of the water in the KPL. If the pH of the water decreases, it will be sprinkled with lime, if the water is cloudy, chemical cationic coagulant will be sprinkled for precipitation. The pH of the water discharged into the river is already pH 6.
Analisis Manajemen Keselamatan dan Kesehatan Kerja pada Jalan Angkut (Hauling Road) dari Front Penambangan ke Crusher dengan Metode Hirarc di PT Lematang Coal Lestari Muara Enim Ramanda, Rahmat; Gumanti, Suhardiman; Susilo, Aris
Jurnal Inovasi Global Vol. 3 No. 9 (2025): Jurnal Inovasi Global
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jig.v3i9.412

Abstract

manajemen keselamatan dan kesehatan kerja (K3) merupakan upaya sistematis agar dapat memastikan lingkungan kerja yang aman, tertib, dan sehat. Penelitian ini bertujuan untuk mengidentifikasi dan menilai risiko K3 pada aktivitas hauling batubara dari front penambangan ke crusher di PT Lematang Coal Lestari, serta mengevaluasi implementasi elemen SMKP di area tersebut. Dalam pelaksanaannya, metode HIRARC (Hazard Identification, Risk Assessment, and Risk Control) digunakan untuk mengidentifikasi potensi bahaya, menilai risiko bahayanya, serta untuk menentukan langkah pengendalian yang tepat. Metode ini menjadi bagian penting dalam penerapan elemen SMKP. Berdasarkan hasil pengamatan di area kerja pengangkutan batubara di PT Lematang Coal Lestari (LCL) dengan 13 aktivitas, diketahui bahwa risikonya di klasifikasikan menjadi tiga. High risk (23,07%), medium risk (61,53%), dan low risk (15,38%). Penerapan SMKP implementasi juga terlihat dari pelaksanaan pengelolaan operasional seperti pembuatan SOP, penggunaan APD, rambu peringatan, dan kegiatan reklamasi. Namun, masih terdapat kekurangan pada aspek pengelolaan kesehatan kerja, seperti belum tersedianya tenaga P3K, dan dokumentasi pemeriksa kesehatan. Temuan ini menunjukkan bahwa meskipun perusahaan telah menerapkan kontrol operasional yang memadai, aspek kesehatan kerja memerlukan perhatian khusus untuk mencapai standar SMKP yang komprehensif. Hal ini berarti bahwa penerapannya belum sepenuhnya optimal dan masih perlu perbaikan berkelanjutan.oleh karena itu,dibutuhkan evaluasi dan perbaikan berkelanjutan untuk meningkatkan efektivitas penerapan (K3) di area hauling
Analisis Produktivitas Pengupasan (Overburden) Pada Penambangan Batubara di PIT Tal Utara Barat PT Bukit Asam, Tbk. Tanjung Enim, Sumatera Selatan Al Fahri, Imam; Gumanti, Suhardiman; Husni , Ahmad
Jurnal Inovasi Global Vol. 3 No. 9 (2025): Jurnal Inovasi Global
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jig.v3i9.421

Abstract

This study aims to analyze work efficiency, productivity of loading and unloading equipment, productivity of hauling equipment, and Match Factor in overburden stripping activities at the North West Pit Tal, Air Laya Mine of PT Bukit Asam, Tbk. Overburden stripping activities are an important part of mining operations that require good coordination between loading and unloading equipment to achieve optimal efficiency and productivity. This study was conducted by directly observing mining operations and analyzing operational data from PT Bukit Asam, Tbk in collaboration with PT Antareja Mahada Makmur (AMM), as its mining contractor. The results showed that the productivity of the Caterpillar 395 excavator was 504.43 tons/hour, while the productivity of the Heavy Duty 785 was 49.46 tons/hour. The match factor value of 0.68 indicates an imbalance in the work synchronization between the loading and unloading equipment. To achieve optimal work harmony (match factor approaching 1), repair slippery and uneven roads to increase the match factor of the loading and transporting equipment used at the research location so that the working time of the loading and transporting equipment is more optimal.
Perencanaan Biaya Tahun 2025 pada Kegiatan Reklamasi di Banko Barat PT Bukit Asam Tbk Tanjung Enim Sumatera Selatan Gumanti, Suhardiman; Aisyah Ramadhani, Sisil; Firmansyah, Denny
Journal of Comprehensive Science Vol. 3 No. 10 (2024): Journal of Comprehensive Science (JCS)
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v3i10.2382

Abstract

Based on Law no. 3 of 2020 article 140 concerning Mineral and Coal Mining which states that "Every holder of a Mining Business Permit (IUP) and Special Mining Business Permit (IUPK) is required to submit a reclamation plan and post-mining plan when applying for a Production Operation IUP or Production Operation IUPK as basis for placing reclamation guarantees. The aim of this research is to calculate the direct and indirect costs required for PT Bukit Asam's reclamation plan. The research method used in this research is using activities in the form of visits and direct observations in the field and also collecting articles as support. Direct costs include recountouring costs, revegetation costs and maintenance costs, which are planned at Rp. 12,889,010,229. Meanwhile for indirect costs, the amount is determined from the indirect cost graph, the plan is Rp. 3,054,695,424, so the total cost of the reclamation plan for the West Banko Pit is Rp. 15,943. ,705,653 with an escalation calculation of 5.51%, it becomes IDR 19,758,945,354.
Analisis Biaya Pengurasan Sedimentasi pada Kolam Pengendap Lumpur di PT Bukit Asam Tbk Unit Pertambangan Tanjung Enim Sumatera Selatan Gumanti, Suhardiman; Julisti, Rena; Yovanda, Ridho
Journal of Comprehensive Science Vol. 3 No. 10 (2024): Journal of Comprehensive Science (JCS)
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v3i10.2383

Abstract

PT Bukit Asam is one of the companies engaged in the coal mining sector which is located in Tanjung Enim, South Sematra. The mining system applied in exploiting coal is open pit mining which produces water called acid mine water (AAT), one of the components of the AAT problem. namely total suspended solid (TSS). At PT Bukit Asam, Bangko Barat, there are several KPLs that are still in use. KPLs that are continuously supplied with mining water certainly produce a negative impact, namely silting. The aim of this research is to analyze the cost of dewatering sedimentation in mud settling ponds. The method used in this research is to use field visits and direct observations. The shallowing itself is caused by rain factors and the long deposition time. To prevent silting, draining is carried out using an excavator and loading of the material using a dump truck. Draining activities in February amounted to IDR 185,634,400.00 handling the mud settling ponds also using chemicals or control methods which are useful for settling mud particles so that the draining process at the KPL runs quickly.
Penerapan Kesehatan Dan Keselamatan Kerja Pada Pengangkutan Batubara Di PT Lematang Coal Lestari Muara Enim Sumatera Selatan Nursani, Rodiyah; Yovanda, Ridho; Gumanti, Suhardiman
Jurnal Ners Vol. 8 No. 1 (2024): APRIL 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jn.v8i1.22115

Abstract

The occupational safety and health (K3) conditions of companies in Indonesia are estimated to be quite low, this can be seen from the high risk of accidents that can occur in a company. Work accidents occur due to workers, work tools and the work environment, so it is necessary to implement occupational safety and health (K3) in carrying out mining activities. Safety and health factors are very important because they have a big influence on employees, society and also company assets. The aim of this research is to look at the implementation of Occupational Health and Safety in coal transportation at PT Lematang Coal Lestari. The method used in this research was field observation in the form of visits and direct field observations as well as data collection in the form of interviews or surveys. The research results showed that from the 8 questionnaire questions given to 5 respondents, PT Lematang Coal Lestari (LCL) employees received very good responses. Keywords: Occupational Health and Safety, Transportation, Coal.
Co-Authors Aisyah Ramadhani, Sisil Al Fahri, Imam Aris Susilo Firmansyah, Denny Husni , Ahmad Julisti, Rena Nursani, Rodiyah Ramanda, Rahmat Sari, Maresta Yovanda, Ridho