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All Journal JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Action Research Literate (ARL) Journal Transformation of Mandalika MINERAL JURNAL TEKNOLOGI MINERAL FT UNMUL
Respati, Lucia Litha
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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PENGGUNAAN KALSIUM HIDROKSIDA (Ca(OH)2) DAN ALUMINIUM SULFAT ((Al2SO4)3) DALAM PENGOLAHAN AIR LIMBAH SETTLING POND PADA PT. INTERNASIONAL PRIMA COAL Kusnanto, Fransiska Angelina; Devy, Shalaho Dina; Winarno, Agus; Hasan, Harjuni; Respati, Lucia Litha
JOURNAL SCIENTIFIC OF MANDALIKA (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 4 No. 11 (2023): November
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol4iss11pp263-270

Abstract

Acid mine drainage (AAT) is water formed at mining sites with a low pH (pH<6) as a result of opening up a potential for rock acidity, causing problems for water quality, rocks containing sulfide minerals. The purpose of this study was to determine the effect of using calcium hydroxide (Ca(OH)2) and aluminum sulphate ((Al2SO4)3) at optimum doses on neutralixing pH and reducing metal content in AAT. This study used a variation of the dose of calcium hydroxide (Ca(OH)2) of 0,5; 0,75; 1; and 1,25 grams and the variation of the dose of aluminum sulphate ((Al2SO4)3) of 1; 1,75; 2,5; and 3,25 grams with a contact time of 20 minutes. The initial concentration of TSS acid mine drainage was 430 mg/L, Fe was 26,92 mg/L, Mn was 7,69 mg/L, and pH was 3,8. The results showed that the doses of calcium hydroxide (Ca(OH)2) and aluminum sulphate ((Al2SO4)3) had an effect on Ph, TSS, Fe, and Mn. TSS removal efficiency was 96,89%, Fe was 99,74%, and Mn was 95,19%.
Identifikasi Tindakan Tidak Aman Sebagai Upaya Pencegahan Kecelakaan Tambang Pada Area Crushing Plant PT. X Riskianto, Achmad; Respati, Lucia Litha; Pontus, Albertus Juvensius; Winarno, Agus; Nugroho, Windhu
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 11, No 1 (2023): Jurnal Teknologi Mineral FT UNMUL Juni 2023
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v11i1.12870

Abstract

Keselamatan Pertambangan (KP) adalah suatu upaya atau tindakan yang bertujuan untuk melindungi para pekerja dan operasional pertambangan, tindakan ini meliputi Keselamatan dan Kesehatan Kerja (K3P) dan Keselamatan Operasional Pertambangan (KOP). Bekerja di area pertambangan merupakan pekerjaan yang memiliki resiko kecelakaan cukup tinggi. Berbagai resiko kecelakaan kerja di pertambangan kerap mengintai dan bisa sampai menyebabkan nyawa melayang. Berdasarkan data kementrian Energi dan Sumber Daya. Berdasarkan hal tersebut, peneliti mengangkat judul ini. Peneliti menggunakan metode penelitian deskriptif. Sumber datanya primer dan sekunder. Sumber data berasal dari hardcopy atau data lain dan 21 responden area coal crushing plant dengan wawancara, dan dengan observasi dilapangan. Berdasarkan survei tentang Tindakan Tidak Aman (TTA), penanggulangan kecelakaan kerja dan penanggulangan Penyakit Akibat Kerja (PAK) di PT. X dapat di simpulkan bahwa hasilnya baik.
EVALUASI COAL RECOVERY PADA KEGIATAN PENAMBANGAN DARI PIT A MENUJU STOCKPILE DI PT. X (EVALUATION OF COAL RECOVERY IN MINING ACTIVITIES FROM PIT A TO STOCKPILE AT PT. X) Azzahra, Siti Maghfirah; Hasan, Harjuni; Oktaviani, Revia; Winarno, Agus; Respati, Lucia Litha
Journal Transformation of Mandalika, e-ISSN: 2745-5882, p-ISSN: 2962-2956 Vol. 3 No. 4 (2022): April
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jtm.v3i4.1138

Abstract

Several coal companies apply a minimum target of coal recovery. Coal recovery is a comparison between the actual tonnage of coal production based on the data from the weighbridge and the coal tonnage as a result of survey measurements expressed as a percentage. The greater the coal recovery more effective the coal was mined. Loss of coal during the mining process was unavoidable. However, if the cause is known in detail, the amount of loss can be minimized by making efforts to repair the existing causes and can increase the value of coal recovery and the utilization of coal reserves owned by the company. There are 30 coal mining data. 19 of them still had a coal recovery below 96% with a total tonnage loss of 1.485,97 tonnes. There are 6 activity criteria that cause coal recovery, including the coal getting less than optimal and still leaves coal on front which accounts for 47,45% of the total loss, coal used as road coating accounts for 5,67%, survey measurement data is less representative the appearance of coal shapes accounted for 2,48%, errors naming on coal haulage coupons accounted for 9,77%, waterlogged fronts accounted for 29,64%, and recleaning accounted for 5,01% of the total tonnage loss.
STUDI ADSORBSI LOGAM BESI (Fe) DAN MANGAN (Mn) PADA AIR ASAM TAMBANG OLEH KOMPOSIT: CLAYSTONE – ZEOLIT - KARBON AKTIF TERAKTIVASI ADSORPTION STUDY OF LOGAM BESI (Fe) AND MANGANESE (Mn) ON ACID MINE WATER BY CLAYSTONE COMPOSITE - ZEOLITE - ACTIVATED CARBO Ginting, Emdananta; Devy, Shalaho Dina; Henny Magdalena; Oktaviani, Revia; Respati, Lucia Litha
Journal Transformation of Mandalika, e-ISSN: 2745-5882, p-ISSN: 2962-2956 Vol. 3 No. 5 (2022): Mei
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jtm.v3i5.1184

Abstract

Composites are a combination of two or more different materials and their properties to form new materials that have better characteristics. The composite was previously composed of activated claystone, activated zeolite, and coconut shell activated charcoal with 3 ratios, namely: (claystone [C] : zeolite [Z] : activated charcoal [A] = 60:20:20; 20:20:60; and 20:60:20. This composite acts as an adsorbent in the adsorption process of acid mine water samples. Based on the results of the adsorption test, it was concluded that the composite cannot neutralize the pH of acid mine water. Of the three types of composites, Composite A (claystone [C] : zeolite [Z] : activated charcoal [A] = 60:20:20) showed a significant influence with a decrease in the concentration of heavy metals Iron and Manganese within 30 min of contact time. Fe adsorption capacity is 20,7 mg/g and Mn is 24,3 mg/g.
Analisis Kestabilan Lereng dengan Metode Finite Element Dan Monitoring Real Time Lereng Low Wall pada Pit X Pt. Indomico Mandiri, Kabupaten Kutai Timur, Provinsi Kalimantan Timur Nur, Al Maida; Pontus, Albertus Juvensius; Respati, Lucia Litha; Oktaviani, Revia; Trides, Tommy
Action Research Literate Vol. 9 No. 6 (2025): Action Research Literate
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/arl.v9i6.2977

Abstract

Penelitian ini bertujuan untuk menganalisis kestabilan lereng low wall di Pit X yang dioperasikan oleh PT Indomico Mandiri di Kabupaten Kutai Timur, Kalimantan Timur. Metode yang digunakan meliputi pemodelan numerik dengan Metode Elemen Hingga (FEM) dan pemantauan lereng secara real-time menggunakan Slope Stability Radar (SSR). Data sifat mekanik batuan diperoleh dari pengujian laboratorium dan observasi lapangan, sementara nilai Geological Strength Index (GSI) ditentukan menggunakan grafik Hoek-Marinos. Pemodelan dilakukan pada enam penampang lereng dengan kondisi kering dan jenuh. Hasil analisis menunjukkan bahwa seluruh nilai faktor keamanan (FK) melebihi ambang batas stabilitas (FK > 1,2), dengan nilai tertinggi 1,35. Displacement hasil pemodelan numerik terkonsentrasi di dasar lereng, dengan nilai maksimum 515 mm pada kondisi kering. Pemantauan real-time menggunakan SSR dari 23 November hingga 23 Desember mencatat pergerakan terbesar sebesar 2000 mm di Area A.1S, yang disebabkan oleh limpasan air permukaan dan aliran dari luar lereng. Perbandingan antara hasil FEM dan data SSR menunjukkan perbedaan signifikan dalam nilai displacement, yang kemungkinan disebabkan oleh asumsi ideal dalam pemodelan. Meskipun demikian, pola pergerakan yang dihasilkan kedua metode menunjukkan kesesuaian, sehingga FEM tetap dapat digunakan untuk prediksi awal ketidakstabilan lereng dan mendukung pengambilan keputusan teknis dalam pertambangan terbuka.
Pengukuran Volume Overburden Menggunakan UAV di Pit 3HWE PT Indominco Mandiri: Measuring Overburden Volume Using UAV at Pit 3HWE PT Indominco Mandiri Sendana, Aprianto Aris; Magdalena, Henny; Devy, Shalaho Dina; Trides, Tommy; Respati, Lucia Litha
MINERAL Vol 10 No 1 (2025): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/vjs1rh30

Abstract

This study aims to measure the overburden volume at Pit 3HWE, PT. Indominco Mandiri using Unmanned Aerial Vehicle (UAV) technology. The use of UAV for volume measurement offers a more efficient and accurate alternative compared to conventional methods. In this research, aerial images were captured using a UAV and processed with photogrammetry software to generate a digital surface model (DSM) and 3D maps. The overburden volume calculations were analyzed and compared with manual measurement data as a reference. The results indicate that UAV usage provides accurate results with higher time efficiency, making it a viable method for mining operations. Factors affecting the measurement results, such as weather conditions and image resolution, were also analyzed in this study.
Co-Authors Agus Winarno, Agus Albertus Juvensius Pontus Azzahra, Siti Maghfirah Ginting, Emdananta Harjuni Hasan Henny Magdalena Kusnanto, Fransiska Angelina Nugroho, Windhu Nur, Al Maida Revia Oktaviani Riskianto, Achmad Sendana, Aprianto Aris Shalaho Dina Devy Trides, Tommy