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All Journal PROMINE Jurnal Chemurgy Jurnal Cahaya Mandalika JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Jurnal Sosial dan Teknologi Journal Transformation of Mandalika Journal of Comprehensive Science MINERAL Jurnal Sosial dan Sains Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Jurnal Penelitian Rumpun Ilmu Teknik Jurnal Sains dan Teknologi Jurnal Teknik Pertambangan (JTP) Jurnal Inovasi Global Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan JURNAL TEKNOLOGI MINERAL FT UNMUL Manufaktur: Publikasi Sub Rumpun Ilmu Keteknikan Industri Venus: Jurnal Publikasi Rumpun Ilmu Teknik Journal of Media, Sciences and Education
Henny Magdalena
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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ANALISIS METODE PENGGALIAN BATUAN MENGGUNAKAN METODE PEMBOBOTAN PADA TAMBANG BATUPASIR KECAMATAN LOA JANAN ILIR KOTA SAMARINDA PROVINSI KALIMANTAN TIMUR Febryantho Pasiakan; Tommy Trides; Henny Magdalena
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 9, No 1 (2021): Jurnal Teknologi Mineral FT UNMUL Juni 2021
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v9i1.5813

Abstract

Metode penggalian dipengaruhi oleh sifat material terutama kekuatan batuannya. Untuk menentukan tingkat kemampugalian suatu massa batuan, perlu studi atau investigasi lapangan seperti pengumpulan data struktur, tingkat pelapukan dan air tanah. Hal ini dilakukan guna mengklasifikasikan suatu massa batuan ke dalam kelas tertentu. Berdasarkan kelas diketahui tingkat kemampugalian massa batuan. Penentuan klasifikasi kemampugalian batuan menggunakan metode pembobotan berdasarkan Rock Mass Rating (RMR) sepuluh sampel batupasir. Penelitian dilakukan berdasarkan pengamatan bidang diskontinu dan kondisi air tanah di lokasi penelitian serta pengujian sampel di laboratorium menggunakan uji kuat tekan batuan (Uniaxial Compressive Strength) yang mengacu  pada SNI 2825-2008. Hasil uji RMR lereng A 56.79 dan lereng B 532.16. Metode penggalian yang disarankan untuk lereng A dan lereng B dengan penggaruan.
Analisis Kestabilan Longsoran Baji Pada Lereng Batupasir, Daerah Kecamatan Loa Janan Ulu, Kota Samarinda, Kalimantan Timur Muhammad Ilham; Tommy Trides; Koeshadi Sasmito; Revia Oktaviani; Sakdillah S; Henny Magdalena; Lucia Litha Respati
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 9, No 2 (2021): Jurnal Teknologi Mineral FT UNMUL Desember 2021
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v9i2.6962

Abstract

Pengaruh bidang kekar sangat mempengaruhi kestabilan pada suatu lereng batuan. Keberadaan bidang-bidang kekar tersebut dapat menjadi bidang gelincir pada suatu jenis longsoran sehingga lereng batuan dapat mengalami pergerakan. Pada penelitian ini analisis longsoran baji dilakukan pada lereng batupasir dengan tinggi 20,57 meter dengan sudut kemiringan lereng 66˚ dan terdapat 33 bidang kekar yang saling memotong.Metode yang digunakan pada penelitian ini yakni dengan melakukan pengukuran dilapangan dengan menggunakan metode scanline untuk mengukur bidang-bidang kekar pada sepanjang pita ukur. Analisis stereografis dilakukan pada penelitian ini untuk menentukan jumlah set orientasi bidang kekar dan analisis faktor keamanan dilakukan dengan menggunakan metode analitik.Hasil analisis yang dilakukan pada lokasi penelitian terdapat 33 bidang kekar dengan jumlah 3 set kekar. Analisis kinematika dengan metode stereografis menunjukkan bahwa potensi longsoran yang dapat terjadi adalah longsoran baji. Analisis kestabilan pada lereng batupasir menunjukkan bawah faktor keamanan longsoran baji sebesar 15,79 dalam hal ini lereng batupasir dapat dinyatakan dalam keadaan stabil.
Optimalisasi Waktu Hambatan Excavator Untuk Mencapai Target Produksi Batubara Pit C CV Kutai Kumala Energy Henny Magdalena; Fransiska Yuniari Saksono
MINERAL Vol 9 No 1 (2024): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i1.4677

Abstract

The barriers on the activity causes losstime. The losstime of excavator that so high cause coal production targets not to be achieved. Therefore efforts are made to improve the losstime. The analysis of multiple linear regression multivariate is used as a problem solving approach, namely finding the maximum limit of idle time and delay time and formulating the optimal losstime. Based on observations of the idle time and delay time of two excavator units operating in the morning shift, the regression equation is obtained Y = 1832.782 – 95.134X1. The equation of optimal losstime is X2 = -0.8729X1 + 10.71. The simulation is carried out based on the average actual data, the maximum idle time limit of 6.67 hours and a delay time of 4.89 hours. For an idle time of 4.45 hours, it is expected that the delay time will not exceed 6.83 hours in order to achieve the production target. The causes of unfulfilled of production were include rain, landslides, breakdown units, slippery, operator needs and et cetera.
Rencana Tahapan Penambangan Batubara Pada Tambang Terbuka Di Pit Selatan PT. RPP Contractor Indonesia Kecamatan Loa Janan Kabupaten Kutai Kartanegara Kalimantan Timur Fauzan Dwi Syahputra; Shalaho Dina Devy; Henny Magdalena
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 3 No. 3 (2024): Agustus : Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v3i3.4051

Abstract

In mining activities, especially in coal mining, of course there is a plan/design in mining activities that will be carried out such as production scheduling, fleet determination, to monthly/annual mining design stages. At PT.RPP Contractors Indonesia (RCI), precisely in the north pit, it has a production target that has been set, so it is necessary to phase out the mining plan to increase the planned production level and also to divide the entire volume in the pit limit into planning units that are smaller and easier to handle. To design a mining activity that will be carried out at PT.RPP Contractors Indonesia in making mining stages by making effective working hours or Standard Operational Parameters (SPO), determining the units to be used in mining activities, determining the fleet system and monthly design/ annual. The method used in making the mining phasing design is by making a block model for the bondary pit design and making schdulling stages in the software to facilitate the achievement of the production targets to be set. The results of the research resulted in mining stages in the Shorterm period (Quarterly) with estimated reserves of Overburden 713.000 BCM dan Coal 146.000 MT. Januari 203.917 BCM/44.500 MT, Februari 234.000 BCM/48.000 MT, Maret 265.000 BCM/54.000 MT with work units used 3 units of Excacvators and HD/dump trucks for OB removal and coal getting processes. With a 3 fleet system for stripping Overburden and Coal getting.
STUDI PENURUNAN KONSENTRASI AIR LIMBAH PENAMBANGAN BATUBARA PADA SUMP PIT A2 DI PT. INDOMINING, SANGA-SANGA KUTAI KARTANEGARA Magdalena, Henny; Sitepu, Anysa Ariel; Winarno, Agus
Jurnal Chemurgy Vol 8, No 1 (2024): Jurnal Chemurgy-Juni 2024
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v8i1.10675

Abstract

Salah satu dampak negatif dari kegiatan penambangan batubara adalah timbulnya air limbah. Air yang di pompa dari tambang dianggap sebagai air limbah hasil penambangan karena air tersebut masih bercampur dengan partikel lumpur yang sangat halus dan terkadang belum sesuai dengan baku mutu air limbah batubara berdasarkan Peraturan Daerah Provinsi Kalimantan Timur. Oleh sebab itu perlu dilakukan penurunan konsentrasi khususnya pada penurunan besi (Fe) dan mangan (Mn)  menggunakan koagulan Aluminium Sulfat Al2(SO4)3, Ferric Chloride (FeCl3) dan Polly Aluminium Chloride, (PAC) dalam skala laboratorium menggunakan jar test dengan variasi dosis 100 mg/L, 150 mg/L, 200 mg/L dan 250 mg/L untuk mengetahui dosis optimum koagulan yang digunakan dan berapa efisiensi removal koagulan terhadap Fe dan Mn pada air limbah serta pH yang dihasilkan setelah penambahan koagulan Hasil penelitian menunjukkan bahwa dosis optimum yang diperoleh adalah 250 mg/L untuk koagulan Al2(SO4)3 dan PAC, sedangkan dosis optimum untuk FeCl3 adalah 100 mg/L. Efisiensi removal yang diperoleh untuk koagulan Al2(SO4)3 adalah  Fe (99,89%), Mn (31,60%), koagulan FeCl3 Fe (60,65%), Mn (31,60%) dan koagulan PAC Fe ( 99,89%), Mn (27,88%). Berdasarkan hasil tersebut koagulan yang paling baik dalam penurunan konsentrasi Fe dan Mn pada air limbah batubara adalah Al2(SO4)3. serta pH yang dihasilkan adalah (6,84). Kata Kunci: limbah batubara, koagulan,  jar test, Fe, Mn
KAJIAN TEKNIS DESAIN DAN MANAJEMEN PENIMBUNAN BATUBARA DI ROM STOCKPILE PT. BARA MEGA QUANTUM KOTA BENGKULU PROVINSI BENGKULU: Technical Study And Management Design Of Coal Stock At Rom Stockpile PT. BaraMega Quantum, Bengkulu Central Regency, Bengkulu Province M Dandy Al Fansya; Agus Winarno; Henny Magdalena; Windhu Nugroho; Sakdillah
Journal Transformation of Mandalika, e-ISSN: 2745-5882, p-ISSN: 2962-2956 Vol. 3 No. 3 (2022): Maret
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jtm.v3i3.1082

Abstract

Stockpile is a temporary storage place for coal before it is sold to consumers. The stockpile must be properly regulated so that the quality of the coal is maintained, so that when it reaches the consumer it is still of the desired quality. The plan is that in November the coal that will be included in the ROM stockpile of PT. Bara Mega Quantum will experience changes, both in quality and quantity. This study aims to determine the readiness of the stockpile to face the planned increase in coal production. PT. Bara Mega Quantum has a ROM Stockpile which is located southwest of the mining site, precisely located in the coal processing area on Pulau Baai Terminal Coal PT. Pelindo Bengkulu, Kampung Melayu District, Bengkulu City, Bengkulu Province. Where the distance between the pit and ROM Stockpile is approximately 67 km. The processing area consists of ROM Stockpile, Hopper, and Jetty Loading. Based on calculations from rainfall data, the total water discharge entering the ROM Stockpile area is 4393,67 m3/day. To accommodate this amount water, sufficient dimensions of the settling pond are needed to prevent overflow. Based on the data processing carried out, the dimensions available sludge settling pond are 5960 m3. The height of the coal pile is taken based on the specifications of the Whell Loader with the Komatsu 350 type. The following is a picture of the dimensions of the Whell Loader with the Komatsu 350 type used in the ROM Stockpile activity by PT BMQ. In accordance with the design that has been made and the data that has been processed for the capacity of the coal stockpile on the ROM Stockpile, namely on ROM 1, ROM 2 and ROM 3, the volume obtained is 20214.58 m3 and for tonnage 26278,95 MT.
Estimasi Biaya Alat Muat Dan Angkut Penambangan Quarry Batu Andesit PT Putra Elan Balindo Pada Kota Palu Sulawesi Tengah Indri Tenri Datu; Henny Magdalena; Windhu Nugroho; Lucia Litha Respati; Harjuni Hasan
Jurnal Sains dan Teknologi Vol. 2 No. 2 (2023): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v2i2.253

Abstract

PT. Putra Elan Balindo is a company engaged in the mining sector specially the andesite minerals domiciled in Palu City. PT. Putra Elan Balindo located in Watusampu Village, Ulujadi District, Palu City, Central Sulawesi, which has an IUP (Mining Business Permit) with an area of 17.89 Ha. To achieve production targets set by the company using a combination of tools mechanics in the form of Excavator Komatsu PC 400 and Dump Truck Hino FM 260 JD, where there is currently only 1 Excavator while the Dump Truck is 2 are needed with a production target of 20,000 m3 per month and have 1 shift working hours. Based on the results of research carried out for one month, it shows that the productivity of the Komatsu PC 400 Excavator is 174.29 m3 / hour and the Hino FM 260 JD Dump Truck is 197.69 m3 / hour for 2 transport equipment. The cost of owning a Hino FM 260 JD Dump Truck is Rp. 476,190/hour and the cost of owning a Komatsu PC 400 Excavator is Rp. 267,857/hour while operational costs for the Hino FM 260 JD Dump Truck are Rp. 1,862,072/ hour and operational costs for a Komatsu PC 400 Excavator Rp. 2,135,421/hour.
Efektivitas Kapur Tohor Terhadap Peningkatan Ph Dan Penurunan Kadar Logam Fe Dan Mn Di Settling Pond 11 PT. Alam Jaya Pratama Site Bara Kumala Sakti Kecamatan Loa Kulu, Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur Jovanda Ego Prisitama; Henny Magdalena; Shalaho Dina Devy
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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

Abstract

The settling pond is the final location where water comes from the Pit, Sump, Disposal and run-off water around the mining location at PT. Alam Jaya Pratama site Bara Kumala Sakti. Water quality in settling pond that does not meet the Mining Activity Waste Water Quality Standards can be managed using chemicals, one of which is Calcium Oxide (CaO). The need for Calcium Oxide can be determined after knowing the most effective dose in the settling pond. Calcium Oxide functions to neutralize pH and reduce metal levels (Fe and Mn) in settling ponds. Based on facts in the field, the poor water quality for the surrounding environment is due to the management period being too long and the efficiency of using Calcium Oxide incorrectly. So that the quality of the water released can meet the standards, regular monitoring and testing of the water quality in the settling pond is required with the final aim of the water output being in accordance with the standards and the amount of Calcium Oxide needed in Settling Pond 11 can also be known. From the results of initial measurements on water samples at Inlet Settling Pond 11 was obtained an average pH of 3,25; levels of Fe 1,61 mg/L; levels of Mn 2,81 mg/L are below standard. By testing using the titration method, the average optimum dose for increasing pH and reducing metal levels was 1 mg/L. After each sample went through a titration test, the average was obtained, namely: pH 7,32; levels of Fe 0,46 mg/L; and levels of Mn 1,63 mg/L. From this average dose, the need for Calcium Oxide is 223,32 kg/month. The comparison of Calcium Oxide usage per month between actual and calculated is 500 kg : 223,32 kg. The recommendation from this comparison is that these results can be taken into consideration to optimize the use of Calcium Oxide in Settling Pond 11.
Evaluasi Unjuk Kerja Peralatan Pada Kegiatan Penambangan Pit-3 Timur, PT. Bukit Asam Tbk Dwi T. S. Fambudi; Harjuni Hasan; Henny Magdalena; Revia Oktaviani; Agus Winarno
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Bukit Asam Tbk is a company operating in the coal mining sector located in Lawang Kidul District, Muara Enim Regency, South Sumatra Province. Observations were carried out on mining activities at Pit-3 Timur and coal handling operational unit-5 to find out what obstacles existed during production activities such as machine breakdowns, queues for transportation equipment, and so on. Therefore, it is necessary to carry out routine maintenance and monitoring of equipment, so that existing obstacles can be minimized. The actual total production value on the mining front is 207,719.15 tons, with the effectiveness of the digging-loading tool being 63.52% and the effectiveness of the tool being 64.89%.
Perhitungan Kehilangan Batubara Pada Kegiatan Penimbangan Sampai Tongkang di PT Multi Harapan Utama Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Ilma Nurjanah; Agus Winarno; Henny Magdalena; Windhu Nugroho
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The research was conducted at the stockROM owned by PT Multi Harapan Utama (PT MHU) which is managed by PT Mitra Terminal Kaltim. In the process of receiving to shipping coal, factors that cannot be avoided. The amount of coal loss from weighing to barge in May was 1,955 tons with factors that caused the loss, namely in the process of weighing, transporting, stacking, and crushing coal and loading on barges, taking test samples and operator negligence. Referring to the reference coal price of the Ministry of Energy and Resources (ESDM) in May 2023 PT MHU has the potential to experience a loss of Rp. 5.251.062.510.
Co-Authors Abdul Malik Agus Winarno Agus Winarno Agus Winarno, Agus Agus Winarno Ainayah Al Fatihah Albertus Juvensius Pontus Albertus Juvensius Pontus Alfiyanda, Ahmad Ardhan Ismail Bandaso, Surya Bidang, Mayleni Bunga Bunga Deni Saldi Devi, Shalaho Dina Devy, Shalaho Dina Dina Devy, Shalaho Dwi T. S. Fambudi Evita Endar Apriliana Fajar Ramadhan Fauzan Dwi Syahputra Febryantho Pasiakan Ferry Potik Kurniawan Fransiska Yuniari Saksono Galih Handhika Galih Handhika Gideon Samari Suno Ginting, Emdananta Harjuni Hasan Harjuni Hasan Harjuni Hasan Hasan , Harjuni Hikmawati Ilma Nurjanah Indri Tenri Datu Indri Tenri Datu Joniardi , Jovanda Ego Prisitama Jovensius Pontus, Albertus Ketut Swarningsih Koeshadi Sasmito Lhita Respati, Lucia Liganic Saprudin Litha Respati, Lucia Lucia Litha Respati Lucia Litha Respati Lucia Litha Respati Lucia Litha Respati M Dandy Al Fansya Miranda, Virgita Muhammad Ashar Alias Suara MUHAMMAD ILHAM Mushawir Mushawir Mutiara Eli Nimasari Nimasari Nirwana Putri Nugroho, Windhu Nurfaysa Permadi, Singgih Prayoga, Yogi Bayu Respati, Lucia Litha Rety Winonazada Revia Oktaviani Revia Oktaviani Revia Oktaviani Revia Oktaviani Revia Oktaviani Rexy Maulana Rofi Taufiqurrahman Roland Fatar Fernados Sirait Ruslan Patur S. Depari, Raja Kami Saeppudin, Ahmad Sakdillah Sakdillah Sakdillah S Sakdillah Sakdillah Saksono, Fransiska Yuniari Saskiyah Saskiyah Satriana Aulia, Andi Sendana, Aprianto Aris Shalaho Dina Devi Shalaho Dina Devy Shalaho Dyna Devy Sitepu, Anysa Ariel Siti Fadlah Musarofah Tommy Trides Tommy Trides Tommy Trides Tommy Trides Tommy Trides Tommy Trides Trides, Tommy Upiani, Ihsan Vivi Widiawati windhu Nugroho Windhu Nugroho Windhu Nugroho Windhu Nugroho windhu Yeriko, Kamril Zwageri, Rizky