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EVALUASI TEKNIS DAN DIMENSI PENIMBUNAN PADA PRODUCT COAL STOCKPILE DI PT. PESONA KHATULISTIWA NUSANTARA PROVINSI KALIMANTAN TIMUR (TECHNICAL EVALUATION AND DIMENSIONS OF DEPOSIT FOR PRODUCT COAL STOCKPILE AT PT. PESONA KHATULISTIWA NUSANTARA, NORTH KALIMA Rexy Maulana; Windhu Nugroho; Henny Magdalena; Agus Winarno; Albertus Juvensius Pontus
JOURNAL TRANSFORMATION OF MANDALIKA (JTM) e-ISSN 2745-5882 p-ISSN 2962-2956 Vol. 3 No. 4 (2022): JOURNAL TRANSFORMATION OF MANDALIKA
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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As of 2022 PT PKN has set a production target that has increased from the previous year, namely 1.5 million MT in 2021 to 6 million MT. From the plan to increase coal production in 2022, it is necessary to increase coal processing capacity which consists of a temporary storage facility for coal before crushing (ROM Stockpile), a coal size reduction machine (crushing machine), a place for temporarily storing coal after crushing (temporary product). coal stockpile) and coal loading docks to barges. Especially in the location of the temporary stockpile of coal which must be properly studied to support the production plan towards 6 million MT.

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

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

The Analysis of Slope Stability using The Simplified Bishop Method and Geometry of Retaining Walls in Palaran District, Samarinda City, East Kalimantan Province Akbar Ilham; Tommy Trides; Harjuni Hasan; Revia Oktaviani; Albertus Juvensius Pontus
Nusantara Civil Engineering Journal Vol 2 No 1 (2023): Nusantara Civil Engineering Journal
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v2i1.450

Landslide is one of the natural disasters that often occurs on natural and artificial slopes. This landslide occurs due to an imbalance of forces acting on the slope or the actuator in the slope area is greater than the resisting force on the slope. Handling needs to be done to avoid landslides, one of which is making a retaining wall. Based on the data obtained from the results of the tests and calculations that have been carried out, the value of the slope safety factor at the research location is 0.397. This value is the value of the unsafe factor of safety (Avalanche). So it is necessary to design a retaining wall with dimensions in between, namely for H = 7 m, H1 = 0.7 m, H2 = 6.3 m, H3 = 1.6 m, H4 = 0.7 m, H5 = 4.9 m, H6 = 2.6 m, H7 = 0.5 m, H8 = 2.5 m, H9 = 3.8 m, and D = 2.5 m. And the results of calculating the stability of the retaining wall that has been designed are obtained for Stability Against Overturning, namely 4.37 > 1.5 (Safe), Stability Against Shifting, namely 2.21 > 2 (Safe), and Stability Against Soil Bearing Capacity, namely 4.14 > 3 (Safe).

Evaluasi Mine Dewatering Terhadap SUMP4 Mengunakan Pompa MF420 EXHV & MF210 MV PT. Indomining Sangasanga Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur William William; Shalaho Dina Devy; Sakdillah Sakdillah; Agus Winarno; Albertus Juvensius Pontus
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 2 No. 2 (2024): May : Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v2i2.244

The combination of a fully dedicated and comprehensive infrastructure, close proximity to ports, an integrated supply chain and strategic synergies with other subsidiaries within the Group, has driven rapid and cost-effective growth.

IDENTIFIKASI TINDAKAN TIDAK AMAN SEBAGAI UPAYA PENCEGAHAN KECELAKAAN TAMBANG PADA AREA CRUSHING PLANT PT. X achmad riskianto; Lucia Litha Respati; Albertus Juvensius Pontus; Agus Winarno; Windhu Nugroho
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

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

Studi Pemanfaatan Batubara Menggunakan Asam Fospat Tunggal menjadi Karbon Aktif di Formasi Pulau Balang dan Formasi Balikpapan di Kota Samarinda Agita Kendari Putri; Agus Winarno; Albertus Juvensius Pontus; Shalaho Dina Devy; Windhu Nugroho
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.v11i1.12959

Batubara merupakan salah satu komoditas bahan tambang yang jumlahnya melimpah di Indonesia, tetapi untuk pemanfaatan batubara sebagai karbon aktif relatif tinggi dalam dunia industri Indonesia. Batubara Bituminus sangat berpotensi jika dimanfaatkan sebagai karbon aktif karena mempunyai kandungan Fixed Carbon cukup tinggi, yaitu sekitar 54%-80%. Proses pembuatan karbon aktif dilakukan dengan cara karbonisasi menggunakan bahan aktifasi kimia (H3PO4) dan akuades. Perbandingan yang digunakan adalah 50 g batubara, dengan konsentrasi molaritas yang berbeda yaitu 1M; 1,5M dan 2M dengan masing-masing 100 ml larutan asam fospat.Karbon aktif yang dihasilkan dari proses karbonisasi akan diuji kandungan air, kadar abu, kadar zat terbang, dan karbon aktif murni pada sampel setiap formasi. Hasil analisis uji karbon aktif pada batubara diperoleh yaitu pada uji kadar air sampel FPB1 23,0347%, FPB2 21,6975, FPB3 22,7728%, FB1 22,9148, FB2 25,5351, FB3 28,5954, FKB1 25,2824%, FKB2 26,2235% dan FKB3 17,2911% .Pada uji kadar abu sampel FPB1 7,5725, FPB2 6,8703, FPB3 5,1709, FB1 16,8405, FB2 7,1604, FB3 3,9695%, FKB1 6,9336%,FKB2 9,3561 dan FKB3 11,6932%. Pada uji zat terbang sampel FPB1 23,7277%, FPB2 20,0113%, FPB3 267661%, FB1 23,7610%, FB2 18,6258%, FB317,7130%, FKB1 22,1996%, FKB2 19,5844% dan FKB3 25,9126. Pada uji karbon aktif murni sampel FPB1 45,6651%, FPB2 51,4209%, FPB3 45,2909%, FB1 36,4837%, FB2 48,6787%, FB3 49,7221%, FKB1 45,5842%, FKB2 44,8270%, dan FKB3 32,3417%. Kata Kunci: Asam Fospat, Batubara, Formasi, Karbonisasi dan Karbon Aktif

STUDI KLASIFIKASI SIFAT TAHAN LEKANG BATUSERPIH FORMASI BALIKPAPAN DAN FORMASI PULAUBALANG DI SAMARINDA Joe Vandame Sitepu; Revia Oktaviani; Harjuni Hasan; Tommy Trides; Albertus Juvensius Pontus
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.v11i1.11427

AbstrakBatuserpih merupakan batuan sedimen yang sangat banyak di lapisan kulit bumi. Penelitian tentang batuserpih akhir – akhir ini semakin banyak dilakukan, karena banyaknya infrastruktur yang berada di atas batuserpih dengan komposisi yang rumit, bertekstur sangat halus dan sulit diamati. Batuserpih umumnya memliki daya tahan rendah, namun beberapa batuserpih memiliki daya tahan yang tinggi. Oleh sebab itu sangat diperlukan pengujian terhadap daya tahan batuserpih, salah satu metode untuk menguji ketahanan batuan adalah uji sifat tahan lekang (Id2). Pada pengujian sifat tahan lekang (Id2) batuserpih Formasi Balikpapan didapatkan 19,36% sampai 53,48%. Berdasarkan nilai tersebut maka batuserpih formasi Balikpapan memiliki ketahan sangat rendah hingga rendah. Sedangkan nilai Id² pada formasi Pulaubalang 29,15% sampai 62,48%, sehingga klasifikasi ketahanannya rendah hingga menengah.Kata Kunci : batuserpih, sifat tahan lekang

Analisis Penurunan Muka Tanah (Subsidens) Menggunakan Metode Empirik Di Terowongan Penstock Sta 10+150 PLTA Kerinci Merangin, Kabupaten Kerinci, Provinsi Jambi. Anshar Abdullah Jawil; Albertus Juvensius Pontus
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.v11i1.11455

Subsidence analysis in this study was carried out in the Kerinci Merangin hydropower pentstock tunnel construction sta 10+150. The depth of the tunnel at the study site ranges from ± 35 m so that it is included in the shallow tunnel category with the rock at the face of tunnel, namely slate (foliated metamorphic rock) with rock mass conditions is jointed rock with an RMR value of around 23. Predicting subsidence in this study was conducted to assess and determine recommendation due to land subsidence risk based on SNI 8460:2017. Calculation of subsidence values uses the empirical Peck method (Peck, 1969) using primary data in the form of coordinates based on sta location, identification of rock masses and tunnel geometry while secondary data in the form of contour maps is intended to determine the depth of the tunnel. Calculation of subsidence using the peck method requires an inclination point (i) based on the recommendation of Mair (1993), and the land subsidence ratio VL is obtained from the table of the results of Goldsapand's research (1993). Based on the research results, it is known that the maximum subsidence value is 0.97 mm and is right at the center of the tunnel. Furthermore, the value of i or the inflection point is 17.5 m from the tunnel axis with a subsidence value of 0.11 mm and the maximum influence area is at a distance of 20.6 m from the tunnel axis. Based on the SNI 8460: 2017 table, the subsidence in the study area is included in category 1 with recommendations

Evaluasi Mine Dewatering Terhadap SUMP4 Mengunakan Pompa MF420 EXHV & MF210 MV PT. Indomining Sangasanga Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur William William; Shalaho Dina Devy; Sakdillah Sakdillah; Agus Winarno; Albertus Juvensius Pontus
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 2 No. 2 (2024): May : Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v2i2.244

The combination of a fully dedicated and comprehensive infrastructure, close proximity to ports, an integrated supply chain and strategic synergies with other subsidiaries within the Group, has driven rapid and cost-effective growth.

Pengaruh Sifat Fisik Terhadap Nilai Uniaxial Compressive Strength Batuan Dengan Kondisi Natural, Jenuh dan Kering Pada Formasi Balikpapan dan Pulaubalang Provinsi Kalimantan Timur Firman Firman; Albertus Juvensius Pontus; Lucia Litha Respati
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 2 No. 3 (2024): Agustus : Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/globe.v2i3.404

The uniaxial compressive strength value is one of the important parameters that is widely used in rock engineering projects in determining rock mass. The strength of rocks is greatly influenced by the water content and degree of saturation in the rock. Reduction of strength in rock is associated with an increase in water content, a slight increase in water content will cause a significant deviation in the compressive strength test value.This research is quantitative research, so to obtain accurate calculation data, testing methods are used in the form of compressive strength tests on rocks and physical properties tests in the treatment of samples of original rock, saturated rock and dry rock before testing. In this research, 2 types of rock were used, including limestone and sandstone in 2 rock formations, namely the Balikpapan formation and the Pulaubalang formation, so that the accuracy of the test result values could be obtained well. Based on the results of observations and calculations that have been carried out, the water content values of limestone in natural, saturated and dry conditions in the Balikpapan formation are obtained with average values of 1.709%, 2.262% and 0.961% respectively. The water content of sandstone in natural, saturated and dry conditions is the Pulaubalang formation with average values of 2.491%, 9.425% and 0.463% respectively. The UCS value of limestone in natural, saturated and dry conditions in the Balikpapan formation has an average value of 25.29 Mpa, 37.57 Mpa and 40.70 Mpa respectively. The UCS value of sandstone in natural, saturated and dry conditions in the Pulaubalang formation has an average value of 9,565 Mpa, 6,537 Mpa and 12,730 Mpa. It can be concluded that the correlation between uniaxial compressive strength values and water content values in limestone and sandstone shows a positive linear correlation, which means they have a strong relationship. The higher the compressive strength value of limestone and sandstone, the lower the water content value.

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