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Revia Oktaviani
Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Mulawarman
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PROSES PENGISIAN STOPE DENGAN MATERIAL TAILING DI PERTAMBANGAN EMAS PONGKOR Oktaviani, Revia
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 (2526.727 KB)

Abstract

Underground mine system applied in mining of gold Pongkor is cut and fill in overhand stoping. Every advances from mining activity must be followed with recharging stope at district ex-production. This impregnation meant as buffer and base treads on the workers when continuing activity of other production. To cost effective supply of material and exploits material is around in mine. Hence applied tailing result of processing as the filler material. Problems arising is if target of produce of 500 ton/day, hence tailing material insufficient hole plug to ex the production. Result of analysis happened transformation of density ore out of 265 ton/m3 becomes 1952 ton/m3 so that acquired percent become 73.3%. Because percentage tailing required is 94%, then happened lacking of filler material 108.48 m3/day. To overcome it need to be strived acquired percent langer ones by minimizing leakances happened at stone and can apply trass material which many there is around location
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).
Analisis Porositas Dan Konduktivitas Hidraulik Batupasir Formasi Kampung Baru, Balikpapan Dan Pulau Balang, Daerah Samarinda, Kalimantan Timur Ainayah Al Fatihah; Shalaho Dina Devy; Henny Magdalena; Tommy Trides; Revia Oktaviani
Journal of Comprehensive Science (JCS) Vol. 1 No. 3 (2022): Journal of Comprehensive Science (JCS)
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/jcs.v1i3.70

Abstract

penelitian ini memiliki tujuan dan masalah untuk mengetahui nilai porositas, nilai Konduktivitas hidrolika dan hubungan antara nilai Porositas dan Konduktivitas Hidrolik batupasir formasi kampungbaru, Balikpapan dan pulau balang dengan. Pada penelitian ini menggunakan penelitian ini menggunakan analisis inti fisik batuan untuk mengetahui nilai porositas dan Konduktivitas hidrolik. Nilai porositas yang telah diuji pada Formasi kampungbaru, untuk batupasir didapatkan rata-rata nilai 14,37% (sedang). Formasi Balikpapan 23.85% (sangat baik). Dan Formasi Pulau Balang 25,35 % (sangat baik). Uji Nilai Konduktivitas hidrolik mendapatkan nilai rata-rata pada Formasi Kampungbaru 3,56E-03 cm/s (Pasir Halus), Formasi Balikpapan 3,27E-03 cm/s (Pasir Halus dan lanau) Dan Pulau Balang 1.00E-03 cm/s (Pasir Halus dan lanau). Berdasarkan Analisis hubungan porositas dan Konduktivitas Hidrolik yang dibuat pada formasi dimana apabila nilai porositas baik maka nilai Konduktivitas hidrolik pun ikut meningkat. Dalam hal ini pun dapat dilihat dari nilai r2 masing-masing formasi yaitu Kapungbaru adalah (r2 = 0,911), Balikpapan (r2 = 0,913) dan Pulau Balang (r2 = 0,940).
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.
ANALISIS FAKTOR KEAMANAN LERENG TERHADAP LONGSORAN JALAN TRIKORA DENGAN PENANGANAN DINDING PENAHAN TANAH Anakta Hartanta sebayang; Revia Oktaviani; Agus Winarno; Tommy Trides; Albertus Juvensius Pontus; Masayu Widiastuti
Educational Building: Jurnal Pendidikan Teknik Bangunan dan Sipil Vol 8, No 2 DES (2022): EDUCATIONAL BUILDING
Publisher : Jurusan Pendidikan Teknik Bangunan Fakultas Teknik Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ebjptbs.v8i2 DES.41798

Abstract

Wilayah Kalimantan Timur yang memiliki iklim tropis dengan curah hujan yang tinggi ditiap akhir tahun menyebabkan kemungkinan longsoran terjadi begitu besar. Berdasarkan dari data longsoran dari Badan Nasional Penanggulangan Bencana (BNPB) tahun 2020 Hingga tahun 2022 Tercatat ± 3000 bencana longsor yang terjadi di Indonesia Kejadian ini menyebabkan  banyak tempat tinggal dan fasilitas umum yang rusak dan memakan korban jiwa yang cukup banyak. Pada kasus longsor di ruas jalan trikora, Kecamatan Samarinda Seberang, Kalimantan Timur terjadi Sebanyak ± 3 kali. Longsor ini terjadi karena dipengaruhi oleh curah hujan ± 200 mm dan termasuk curah hujan sedang. Longsor menyebabkan seluruh jalan terputus. Dengan cara ini, pemerintah akan melakukan tindakan korektif, salah satunya adalah pembangunan dinding penahan tanah/pipa dengan tujuan untuk mencegah terjadinya longsor susulan. Penelitian ini bertujuan untuk mengetahui faktor keamanan lereng, dan untuk menguji kekuatan tanah itu sendiri dan dinding penahan tanah. Metode yang digunakan dalam menentukan keamanan lereng itu sendiri menggunakan metode Mohr-Coloumb dengan bantuan software Plaxis atau Slide. Pengujian kali ini dilakukan pada skala laboratorium dengan menggunakan alat Direct Shear Test. Hasil analisis yang didapatkan nilai faktor keamanan lereng yaitu 1.393 dan jika diberi beban 100 Kpa nilai faktor keamanan lereng yaitu 0.819. Untuk kestabilan dinding penahan tanah didapatkan yaitu stabilitas terhadap guling 1.79, stabilitas terhadap geser 0.91, dan stabilitas terhdap daya dukung tanah yaitu 3.44. Faktor Keamanan lereng dengan pile bor 3 meter yaitu 2.459 dan faktor keamanan lereng dengan pile bor 6 meter yaitu 2.630. Hasil perhitungan yang didapatkan nilai faktor keamanan dinding aman terhadap lereng. Kata Kunci: Dinding Penahan Tanah, Faktor Keamanan,Tanah Longsor ABSTRACT The area of East Kalimantan which has a tropical climate with high rainfall at the end of each year causes the possibility of landslides to occur so large. Based on landslide data from the National Disaster Management Agency (BNPB) in 2020 Until 2022, ± 3000 landslides have been recorded in Indonesia. In the case of landslides on the Trikora road, Samarinda Seberang District, East Kalimantan, it occurred ± 3 times. This landslide occurred because it was influenced by ± 200 mm rainfall and included moderate rainfall. The landslide caused all roads to be cut off. In this way, the government will take corrective actions, one of which is the construction of retaining walls/pipes with the aim of preventing further landslides. This study aims to determine the safety factor of the slope, and to test the strength of the soil itself and the retaining wall. The method used in determining the safety of the slope itself uses the Mohr-Coloumb method with the help of Plaxis or Slide software. The test this time was carried out on a laboratory scale using the Direct Shear Test tool. The results of the analysis that the slope safety factor value is 1.393 and if given a load of 100 KPa the slope safety factor value is 0.819. For the stability of the retaining wall, it is obtained that the stability against overturning is 1.79, the stability to shear is 0.91, and the stability to the bearing capacity of the soil is 3.44. The safety factor of the slope with a 3 meter pile drill is 2.459 and the safety factor of the slope with a 6 meter pile drill is 2.630. The calculation results obtained the value of the safety factor of the wall is safe against the slope.Keywords: Safety Factor, RetainingWall, Landslide
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
Kajian Ukuran Butir Agregat Batuaspal Buton (Asbuton) Terhadap Lapisan Aspal Beton Suhaila Ridwan; Revia Oktaviani; Agus Winarno; Windhu Nugroho; Shalaho Dina Devy
Jurnal sosial dan sains Vol. 3 No. 1 (2023): Jurnal Sosial dan Sains
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2015.063 KB) | DOI: 10.59188/jurnalsosains.v3i1.657

Abstract

Latar Belakang : Asbuton (Batuaspal Buton) merupakan campuran antara bitumen dengan bahan mineral lainnya dalam bentuk batuan, karena asbuton merupakan material yang ditemukan begitu saja di alam, maka kadar bitumen yang dikandungnya sangat bervariasi dari rendah sampai tinggi. Maka oleh karena itu untuk mengetahui pemanfaatan dan pemeliharaan jalan maka dilakukan pengujian terhadap Asbuton. Tujuan : Penelitian ini bertujuan untuk menemukan komposisi campuran yang baik dalam penggunaan Asbuton non ekstraksi dengan memanfaatkan kadar bitumen dan mineral yang masih menyatu dalam batuan tersebut terhadap kualitas perkerasan jalan lapisan aspal beton AC-WC (Asphalt Concrete-Wearing Course). Metode : Adapun tahapan analisis data hasil pengujian penelitian adalah analisis data berat jenis dan penyerapan agregat, analisis keausan agregat, analisis rancangan campuran agregat (Job Mix Design), analisis data pengujian Karakteristik Marshall. Untuk proses pengolahan datanya maka dilakukan analisis data menggunakan aplikasi software Microsoft Excel. Berdasarkan hasil pengujian karakteristik Marshall terhadap campuran Batuaspal Buton sebagai agregat halus dan Sirtu Kukar sebagai agregat kasar dan medium. Hasil : Adapun hasil perhitungan dari nilai stabilitas marshall adalah 972,77 kg-1477,22 kg, nilai Flow (pelelehan) adalah 2,6 mm – 10 mm, nilai perolehan VMA adalah 11,585% - 16,813%, nilai perolehan VIM adalah 3,238% - 5,461%, nilai perolehan VFA adalah 63,717% - 78,848%, nilai perolehan marshall Q adalah 127,290 kg-516,864 kg, kadar Aspal Optimum (KAO) adalah 3,4% untuk kualitas jalan lapisan aspal beton AC-WC (Asphalt Concrete-Wearing Course). Kesimpulan: Maka dapat disimpulkan hasil penelitian pengujian marshall dengan 23% campuran agregat halus Asbuton, hubungan antara kandungan kadar aspal pertamina penetrasi 60/70 dan seluruh parameter Marshall dan volumetrik menggunakan agregat Asbuton dan sirtu kukar kandungan kadar aspal optimum berada pada kadar 3,4% untuk kualitas jalan lapisan aspal beton AC-WC (Asphalt Concrete-Wearing Course).
Studi Pengaruh Powder Factor Terhadap Fragmentasi Peledakan Dan Produktivitas Alat Gali Muat Di PT. Ansaf Inti Resources Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Fernando Lawangan; 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.v7i2.3346

Abstract

One of the successes of a blasting is if the results of fragmentation are obtained with good size and relatively uniform so that the production target can be met. The size of the fragmentation was analyzed using Split Desktop 2.0 which resulted in a curve of the size of the fragmentation and the percentage of sieve pass (screening), at Pit 2 the optimal powder factor was between 0.20 kg/m³-0.26 kg/m³, while at Pit 7 it was between 0.22 kg/m³-0.24 kg/m³ which results in top size fragmentation in March 25.02 cm-43.2 cm, April April 35.37 cm-50.59 cm, May 19.79 cm-32.28 cm, June 26.45 cm-63.69 cm, which affect the digging time generated from the Komatsu PC 400 Excavator with an average top size fragmentation size of 38.33 cm with an average digging time of 7.95 seconds, while the Hyundai R 850 LC-9 Excavator with a fragmentation top size the average top size is 33.97 cm with an digging time of 8.44 seconds, with the average productivity of the Komatsu PC 400 Komatsu of 198.49 BCM/Hour from a plan productivity of 200 BCM/Hour while the Hyundai R 850 LC-9 average productivity a of 364.41 BCM/Hour from the plan productivity of 350 BCM/Hour
Analisis Uji Kuat Tekan Uniaksial Batupasir Pada Formasi Pamaluan, Kecamatan Longikis, Kabupaten Paser, Provinsi Kalimantan Timur Musodiq Musodiq; Tommy Trides; Shalaho Dina Devy; Revia Oktaviani; 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.v8i1.3921

Abstract

The uniaxial compressive strength test was carried out to determine the value of rock strength. This research was conducted on sandstones in the Pamaluan Formation. The tests carried out in this study were physical properties tests, compressive strength tests and grain size tests on sandstones with a total of 30 samples on the physical properties test, 10 samples on the mechanical test and 500 gram grain size test at each point, the purpose of which is to determine the effect of porosity on the compressive strength of rock. In testing the physical properties carried out, the lowest and highest porosity values ​​were 17.27 and 22.91%. The results of the compressive strength test with the lowest and highest values ​​were 3.05 and 7.63 MPa. The grain size test results at points 1 and 2 are the same, namely fine sandstones with a percentage of 45 and 44%. From the results of research that has been done the value of porosity and grain size is very influential on the compressive strength test.
Akurasi Titik Bor melalui Digitalisasi Hanwha as a Total Solution (Hats) Project PT. Hanwha Mining Services Indonesia Mardan Ali; Shalaho Dina Devy; Revia Oktaviani; Agus Winarno; Lucia Litha Respati
Jurnal sosial dan sains Vol. 3 No. 9 (2023): Jurnal Sosial dan Sains
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsosains.v3i9.1007

Abstract

Latar Belakang: Program “Hanwha As a Total Solution (HATS)” di PT. Hanwha Mining Services Indonesia (HMSI) site PT. Kideco Jaya Agung (KJA) merupakan salah satu metode (project) yang dikembangkan Hanwha Corporation dibidang pertambangan seperti digitalisasi pengeboran untuk dapat meningkatkan akurasi dan memudahkan pemantauan jarak jauh (remote monitoring) melalui suatu perangkat saling terkoneksi satu sama lain. Deviasi yang dicari dihitung berdasarkan pemodelan dan interpretasi koordinat plan dan aktual setelah dilakukan pengeboran, baik dengan fitur DrillPacemaker ataupun pengeboran dengan acuan pemasangan titik manual. Tujuan: Untuk mengetahui akurasi titik bor melalui digitalisasi “Hanwha As a Total Solution (HATS)” di PT. Hanwha Mining Services Indonesia (HMSI) site PT. Kideco Jaya Agung (KJA). Metode: Penelitian ini bersifat kuantitatif di mana menguji teori-teori yang telah ada dan pengaplikasiannya dalam sebuah statistik. Hasil: Hasil pengeboran fitur DrillPacrmaker Area 300323_EX167 (E) dengan nilai rata-rata deviasi yaitu 0,13 m dan Area 140423_EX163 (B) menghasilkan nilai deviasi rat-rata yaitu 0,07 m. Adapun pengeboran dengan acuan marking point manual area 290323_EX178 (B) menghasilkan nilai rata-rata deviasi yaitu 1,13 m dan area 300323_TOL (B) menghasilkan nilai rata-rata deviasi yaitu 0,95 m. Sehingga pengeboran dengan metode digital HATS DrillPacemaker masuk kategori Achieved pada nilai KPI ≤ 0,15 m lebih akurat dari hasil pengeboran marking point manual. Kesimpulan: Berdasarkan perhitungan dan analisis yang dilakukan, ketercapaian (achievement) akurasi titik bor aktual terhadap titik bor rencana dengan metode pengeboran digital HATS masuk dalam kategori nilai KPI Collaring yaitu ≤ 0,15 m dibanding metode pengeboran acuan marking point manual.
Co-Authors Achmad Faisal Agus Winarno Agus Winarno Agus Winarno, Agus Ainayah Al Fatihah Albertus J Pontus Albertus Juvensius Pontus Albertus Juvensius Pontus Amila, Sitti Nur Anakta Hartanta sebayang Ashabul Kahfi, Ashabul Azzahra, Siti Maghfirah Benny Christian BB Bryan Andreas Turnip Budi Utama, Yogi D. Devy, Shalaho Devy, Shalaho Dina Dina Devi, Shalaho Dina Devy, Shalaho Dionisyus Fransiskus Sinaga Fernando Lawangan Ginting, Emdananta Gunawan Manullang, Ronal Edi Harjuni Harjuni Hasan Harjuni Hasan Henny Magdalena Ilham, Akbar Irvantoni Simbolon, Desron Jaba, Yafet Juvensius Pontus , Albertus Juvensius Pontus, Albert Juvensius Pontus, Albertus Juvensius Pontusi, Albertus Kasbillah, Kasbillah Kevin Elzar Rosera A Kresna Phadiakara Krisanto Yardin Panggeso L. Tobing, Ciko Gratio Parkletos Lifia Kemala Dewi Litha Respati, Lucia Lucia Litha Respati Lucia Litha Respati M. Rijal, M. Mardan Ali Masayu Widiastuti Milda Milda Muhammad Rayhan Fhadillah Musodiq Musodiq Nimsi, Yekeskiel Nugroho, Windhu Nur Qorima Azis Nur, Al Maida Nurhidayat, Royan Pontus, Albertus Juvensius Rafael Bonardy Gultom Respati, Lucia Litha Ronald Alvin Ifnie, Jones S. Depari, Raja Kami Sandri Tandi Rapang Satria Bekti, Nanda sebayang, Anakta Hartanta Sembiring, Irianta Ibo Shalaho Dina Devy Shalizam, Shalizam Sharon Tria Kurniawati Silaban Silalahi, Abdi Brema Sitepu, Joe Vandame Situmorang, Ardo P Sokisha, Sokkia Suhaila Ridwan Suharni Suharni Tommy Trides Tommy Trides Tommy Trides Tommy Trides Trides, Tommy Vandrianus Felix Feto Nuwa W. S. Gumilang, W. S. Gumilang Wahyu Garini, Andini Dwi Widiastuti, Masayu Windhu Nugroho Windhu Nugroho windhu Nugroho Windhu Nugroho Windhu Nugroho windhu Yekeskiel Nimsi Yufita, Zaenul