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All Journal APLIKA Jurnal Ilmu Pengetahuan dan Teknologi Journal of Degraded and Mining Lands Management Jurnal Chemurgy JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Baselang: Jurnal Ilmu Pertanian, Peternakan, Perikanan dan Lingkungan Dinamika Lingkungan Indonesia Journal Transformation of Mandalika MINERAL Nusantara Civil Engineering Journal Jurnal Inovasi Global JURNAL TEKNOLOGI MINERAL FT UNMUL Journal of Media, Sciences and Education
Harjuni Hasan
Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Mulawarman
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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PENGGUNAAN RIPPER DALAM MEMBANTU EXCAVATOR BACK HOE PADA PENGUPASAN OVERBURDEN TANPA PELEDAKAN (Blasting) PADA TAMBANG BATUBARA SKALA KECIL Hasan, Harjuni
APLIKA Jurnal Ilmu Pengetahuan dan Teknologi Vol 8, No 1 (2008): Februari 2008
Publisher : APLIKA Jurnal Ilmu Pengetahuan dan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1319.343 KB)

Abstract

Ripper merupakan alat bantu Bulldozer yang berfungsi menggaru batuan keras. Dan dengan menggunakan ripper pada pengupasan overdurden dapat meningkatkan produksi, meminimalkan biaya operasional khususnya penggunaan bahan bakar minyak dan biaya perawatan peralatan alat gali muat
Tingkat keberhasilan reklamasi lahan bekas tambang batubara pada PT Bukit Baiduri Energi Kabupaten Kutai Kartanegara kota Samarinda Kalimantan Timur Aipassa, Marlon Ivanhoe; Zainuddin, Zainuddin; Hasan, Harjuni
Dinamika Lingkungan Indonesia Vol 7, No 2 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.213 KB) | DOI: 10.31258/dli.7.2.p.102-110

Abstract

Kartanegara Regency and Samarinda City East Kalimantan. From the results of the research and evaluation of the reclamation plan documents and RKTTL, as well as the reclamation implementation report, the Backfilling plan for 2017 is 35.80 Ha and is realized at 22.36 Ha, so that the percentage of success rates reaches 62,46%. The land management and land revegetation plan for 2017 is 62.12 Ha and is realized at 10.26 Ha, so that the percentage of success rate is 16.52%. Revegetation of PT BBE land for the last 3 (three) years from 2015-2017 with a plan of 165.17 Ha and realized as much as 129.05 Ha, resulting in a percentage of success rate of 78.13%, but when compared with the total realization of reclamation (land arrangement ) amounting to 109.06 Ha, realization of revegetation 129.05 Ha, then the success rate of revegetation of reclaimed land is 118.33%. This shows that PT BBE's commitment to environmental management is quite good. Based on the results of laboratory analysis, water quality at all outlet points of PT BBE compliance still meets environmental quality standards of pH 6-7 (BML 6-9). While the soil quality of top soil does not meet environmental quality standards (soil pH 3.68). Based on the overall evaluation results, the percentage of successful reclamation implementation at PT BBE is 78.43% (categorized as moderate).
Disposal slope design based on low-plasticity rock’s shear strength in coal mining activities Harjuni Hasan; Revia Oktaviani; Tommy Trides; Dionisyus Fransiskus Sinaga
Journal of Degraded and Mining Lands Management Vol 10, No 1 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.101.3821

Abstract

Slope stability is the primary factor in designing a stable slope. The strength of the disposal slope relies on the characteristic of the dump materials. The rock shear strength denotes rock ability to withstand the burden, both constant and dynamic load. The weakest material used as a reference in designing the disposal slope is siltstone in Pulaubalang formation (location-04). The safety value in Location 04 and 02 tend to drop quickly as the inclination increase, while the safety in location 01 and 03 tend to fall slowly. This indicates that rocks with a lower plasticity index tend to be stronger in steeper slope conditions. The slope geometry was designed to be 10, 15, 20, and 25 meters high with a slope angle of 10o, 15o, 20o, 25o, 30o, 35o, 40o, 45o, 50o, 55o, and 60o. The slope geometry is considered stable and safe. However, this study suggests that the most effective slope design is the slope with 25 meters high, overall slope of 25,3o; the single slope of 35o; berm width 4,66 meters, bench height of 5 meters, with the safety factor value of 4.30 (SF= 4.30).
Optimasi Konsumsi Fuel Dump Truck Terhadap Pengaruh Grade Jalan Pada Aktivitas Penambangan Pada PT. Pamapersada Nusantara Kecamatan Sangatta Utara Kabupaten Kutai Timur Mushawir Mushawir; Harjuni Hasan; Henny Magdalena
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3338

Abstract

The grade or slope of the road in a mining activity is certainly unavoidable. In addition to naturally following topographical contours, the shape of the mining pit is carried out from a high elevation leading to the lowest elevation following the slope level and the continuity of the excavation material makes the road should be made sloping. The high or low value of the road grade in addition to affecting the speed and travel time required by the unit, of course, also affects the level of fuel consumption. PT. Pamapersada Nusantara uses a conveyance unit with the HD Komatsu 785-7 type to move overburden material. Based on the results of the analysis, in the loaded condition, grade 2% uses 0.45 liters of fuel, 5% grades 0.77 liters, 6% grades 0.89 liters, 8% grades 1.09 liters and grades . While in the unloaded condition, grade 2% uses 0.19 liters of fuel, 5% grades 0.35 liters, 6% grades 0.4 liters, 8% grades 0.47 liters and 9% grades 0. 52 liters.
Studi Efek Skala pada Uji Kuat Tekan Uniaksial Terhadap Batupasir Pada Formasi Balikpapan Daerah Samarinda Utara, Provinsi Kalimantan Timur Milda Milda; Tommy Trides; Harjuni Hasan; Revia Oktaviani; Agus Winarno
MINERAL Vol 7 No 2 (2022): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v7i2.3352

Abstract

Scale effect testing on rocks is carried out with the aim of knowing the strength of a rock based on different dimensions. This test was carried out using a uniaxial compressive strength test and also testing the physical properties of rocks. In the rock compressive strength test used 5 dimensions of rock samples with a H/W ratio of which are 4.5/3, 6/3, 7.5/3 for dimensions of 3 cm, 5.25/3.5, 7 /3.5, 8.75/3.5 for dimensions 3.5 cm, 6/4, 8/4, 10/4, for dimensions 4 cm, 6.75/4.5, 9/4.5, 11.25/4,5 cm for the 4.5 cm dimension and for the 5 cm dimension, namely 7.5/5, 10/5 and 12.5/5. Physical properties testing is carried out to determine the porosity value in the test rock samples, which will then be compared between the porosity values ​​and the results of the compressive strength test of rock samples. Physical properties testing carried out obtained the average value of rock porosity, namely 22.562%, 22.122%, 20.454%, 21.227%, and 22.413%. In the scale effect test, it is known that the higher the rock sample, the smaller the value of the rock strength can be seen based on the R2 value obtained in the Balikpapan Formation, which is 0.0548.
DECREASE LEVELS OF IRON (Fe) AND MANGANESE (Mn) IN ACID MINING WATER USING ACTIVE CARBON OF EGG SHELL Sandri Tandi Rapang; Shalaho Dina Devy; Windhu Nugroho; Harjuni Hasan; Revia Oktaviani; Tommy Trides
Jurnal Chemurgy Vol 6, No 2 (2022): Jurnal Chemurgy-Desember 2022
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v6i2.9290

Abstract

Acid mine drainage is acidic water that arises as a result of mining activities. Acidic water has a high acidity, which is often characterized by a low pH and contains high levels of heavy metals Fe and Mn. The purpose of this study was to determine the effect of activated carbon on the adsorption process and the effect of mass of activated carbon on eggshells. The method used in this research is the adsorption method using activated carbon of eggshell which is physically and chemically activated. This study used a mass variation of 5, 10, 15 and 20 grams with a contact time of 30 minutes and an adsorbent size of 200 mesh. The parameters studied were heavy metals iron (Fe) and manganese (Mn). The initial concentration of Fe acid mine waste was 29.179 mg/L, and Mn was 7.9692 mg/L. The results showed that the mass of activated carbon had an effect on decreasing the levels of Fe and Mn metals. On physical activation the average decrease in Fe metal was 99.50% and Mn metal was 53.21%, while on chemical activation the average decrease in Fe metal was 97.72% and Mn metal was 97.97%.Keywords: Acid mine water, Fe, Mn, Activated carbon, egg shell
Studi Studi Pengaruh Tingkat Getaran Tanah (Ground Vibration) Akibat Peledakan Terhadap Bangunan sekitar Pit 13 HW Vandrianus Felix Feto Nuwa; Revia Oktaviani; Harjuni Hasan; Tommy Trides; Albertus Juvensius Pontus
MINERAL Vol 8 No 1 (2023): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v8i1.4085

Abstract

PT. PAMA is a company engaged in mining and is a contractor of PT. Indominco Mandiri which has been running since 1996. The work contract given is blasting, from blasting activities many impacts arise, one of which is ground vibration, therefore it is necessary to measure the level of ground vibration in the west block area where there are several critical areas in the form of buildings such as offices , solar (fuel oil) storage, and PT. Indominco Mandiri, where there have been complaints regarding large vibrations and the potential for diesel spills from fuel oil. In the study the peak vector sum (pvs) value produced in December 2022 was 1.57 mm/s with the closest distance of 785 meters and in January 2023 4.21 mm/s with a distance of 500 meters. The maximum use of explosives item for explosive holes in December 2022 and January 2023 is 2,513 kg. This pvs value is still safe, because it is still below 5.0 mm/s and according to SNI 7572: 2010.
Efektivitas Adsorpsi Karbon Aktif Tempurung Kelapa Terhadap Kandungan Besi (Fe) dan Mangan (Mn) Serta Ph Pada Pengelolaan Air Asam Tambang Batubara Virgita Miranda; Windhu Nugroho; Henny Magdalena; Shalaho Dina Devy; Harjuni Hasan
Jurnal Inovasi Global Vol. 2 No. 2 (2024): Jurnal Inovasi Global
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jig.v2i2.55

Abstract

AAT (air asam tambang) merupakan salah satu permasalahan dalam aktivitas penambangan batubara, Air tersebut terbentuk sebagai hasil oksidasi dari mineral sulfida yang bereaksi dengan oksigen di udara pada lingkungan berair. Pengambilan sampel AAT dilakukan di PT. Internasional Prima Coal dengan kondisi awal nilai pH 3,52, kadar logam besi (Fe) 23,18 mg/L dan kadar logam mangan 8,60 mg/L. berdasarkan kondisi awal sampel menunjukkan bahwa sampel tidak layak dikarenakan tidak memenuhi standar baku mutu air limbah pertambangan menurut PerMen LHK No.05 Tahun 2022. Karbon aktif tempurung kelapa merupakan salah satu media adsorpsi yang dapat digunakan dalam pengolahan air asam. Pada penelitian ini menggunakan karbon aktif tempurung kelapa dengan variasi dosis/ massa adsorben 2 gram, 4 gram, 6 gram dan 8 gram serta variasi waktu kontak selama 30 menit, 60 menit 90 menit dan 120 menit. Hasil penelitian yang diperoleh menunjukkan bahwa penggunaan karbon aktif tempurung kelapa sebagai media adsorpsi sangat efektif. Pada saat penggunaan dosis adsorbat sebanyak 8 gram dan waktu kontak 120 menit menghasilkan peningkatan pH menjadi 9,70 dan penurunan kadar Fe menjadi 0,21 mg/L serta kadar Mn menjadi 0,26 mg/L.
ANALISIS KEMAMPUGARUAN MASSA BATUAN BERDASARKAN METODE ROCK MASS RATING PIT S22GSB1 PT KITADIN EMBALUT SITE TENGGARONG SEBERANG KUTAI KARTANEGARA KALIMANTAN TIMUR Gerry Tri Virgin; Harjuni Hasan
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 4, No 1 (2016): Jurnal Teknologi Mineral FT UNMUL Desember 2016
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v4i1.1422

Abstract

Pada tambang terbuka kegiatan pembongkaran massa batuan sangat sering kita jumpai. Kegiatan tersebut dapat dilakukan dengan tiga metode, yaitu penggalian langsung, penggaruan dan peledakan. Apabila pemilihan pembongkaran massa batuan tidak tepat maka akan berpengaruh terhadap produktivitas tambang. Penentuan metode pembongkaran massa batuan dapat dilakukan dengan menggunakan metode grading. Pada metode grading, penentuan metode pembongkaran dengan menggunakan pembobotan parameter dari sebuah massa batuan yang disebut Rock Mass Rating. Parameter – parameter massa batuan akan dilakukan pembobotan nilai untuk mengetahui nilai dari massa batuan. Bobot nilai dari massa batuan tersebut dapat dihubungkan dengan metode pembongkaran massa batuan yaitu free digging, ripping dan blasting. Hasil dari penelitan ini menunjukan metode pembongkaran massa batuan untuk setiap penurunan elevasi 10 meter. Dari luas pit sebesar 56,5 ha prosentase penyebaran metode pembongkaran setiap penurunan elevasi 10 meter bervariasi yaitu elevasi 10 hingga 0 msl direct digging 21% dan ripping 51%. Elevasi 0 hingga -10 msl ripping 54% dan blasting 15%, elevasi -10 hingga -20 msl ripping 59% dan blasting 11%, elevasi -20 hingga -30 msl ripping 43% dan blasting 25%, elevasi -30 hingga -40 msl ripping 73%.
OPTIMALISASI ALAT GALI MUAT UNTUK MENCAPAI TARGET PRODUKSI BATUBARA PT. KALTIM DIAMOND COAL, KABUPATEN KUTAI KARTANEGARA, PROVINSI KALIMANTAN TIMUR Narius ,; Harjuni Hasan
JURNAL TEKNOLOGI MINERAL FT UNMUL Vol 6, No 2 (2018): Jurnal Teknologi Mineral FT UNMUL Desember 2018
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtm.v6i2.1756

Abstract

Optimalisasi waktu kerja alat gali muat pada penggalian batubara (coal getting) ini dilakukan adalah dengan menghitung produksi alat gali muat. Setelah mendapatkan hasil produksi dari alat mekanis, dalam penelitian ini dilakukan evaluasi karena tidak tercapainya target produksi batubara. Pada penelitian ini ditemukan bahwa efisiensi kerja alat gali muat kurang maksimal, akibat mengalami kerusakan pada alat gali muat serta hambatan-hambatan kerja. Efisiensi kerja Hitachi ZX870 adalah 45 % dengan produksi sebesar 59625.30 MT/bulan alat mengalami kerusakan kemudian di back up alat gali muat Sany SY465 produksi sebesar 10217.53 MT dan  di back up Caterpillar 340D2L produksi sebesar 3482.43 MT sehingga total produksi sebesar 73370.10 MT, sedangkan target produksi sebesar 85000 MT/bulan. Setelah dilakukan optimalisasi waktu kerja, efisiensi kerja meningkat sebesar 60 % produksi Hitachi ZX870 sebesar 89527.40 MT/bulan
Co-Authors Agus Winarno Agus Winarno Agus Winarno Agus Winarno, Agus Aipassa, Marlon Ivanhoe Albertus Juvensius Pontus Andini Dwi Wahyu Garini Azzahra, Siti Maghfirah Bidang, Mayleni Devy, Shalaho Dina Dina Devy, Shalaho Dionisyus Fransiskus Sinaga Donal Donal Donal, Donal Edhi Sarwono Gerry Tri Virgin Gina Saptiani Graciella Jacob Hamzah Umar Henny Magdalena Hikmawati Ibrahim Ibrahim Ilham, Akbar Jawatir Pardosi Jumsar A Kusnanto, Fransiska Angelina Lucia Litha Respati Lumban Tobing Bill Rexy Megawati AP Milda Milda Mushawir Mushawir Narius , Nugroho, Windhu Nurfaysa Pontus, Albertus Juvensius Respati, Lucia Litha Revia Oktaviani Rinto Syahreza Pahlevi Sakdillah Sakdillah A Sandri Tandi Rapang Sitepu, Joe Vandame Tommy Trides Tommy Trides Tommy Trides Toni, Toni Trides, Tommy Vandrianus Felix Feto Nuwa Virgita Miranda Warman, Neni Windhu Nugroho Windhu Nugroho windhu Wiradhana, Ni Made Ayu Dwi Kartika Yauri Imanuel Tobak Zainuddin, Zainuddin