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Revia Oktaviani
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Pengaruh Kadar Air terhadap Nilai Kuat Geser Batulempung pada Cekungan Kutai Menggunakan Metode Direct Shear di Provinsi Kalimantan Timur Muhammad Rahul Shidiq; Tommy Trides; Albertus Juvensius Pontus; Revia Oktaviani; Ardhan Ismail; Rety Winonazada
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 3 No. 3 (2025): 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.v3i3.956

Abstract

In the Kutai Basin area, seasonal changes such as high rainfall can significantly increase groundwater content, so that the effect of water content on the shear strength of claystone, increasing water content in rocks tends to decrease shear strength. Water in the pores or fractures can increase pore water pressure and reduce effective normal stress. Shear strength is one of the most important mechanical parameters used to assess soil and rock stability, this parameter is very important in slope stability analysis, foundation planning, and various civil engineering and mining applications. Therefore, this study was conducted to determine whether the water content in rocks can affect the strength of rocks in receiving shear forces. The method used in this study is more quantitative and specific to the effect of water content on the shear strength of claystone in this area. Increasing water content in rocks tends to reduce shear strength. This study was conducted by taking claystone samples from several locations in the Kutai Basin. Data collection in the form of primary data and secondary data for testing physical properties and testing mechanical properties, in testing physical properties, the water content value will be taken as supporting data which is one of the factors that affect rock strength, in testing mechanical properties, claystone shear strength data will be taken. From the results of the physical properties test calculations, the air content in each Formation is obtained, namely, in the Kampungbaru Formation the minimum air content value is 15.54% and the maximum is 20.17%, in the Balikpapan Formation the minimum air content value is 10.21% and the maximum is 12,88%, in the Palaubalang Formation the minimum air content value is 10.49% and the maximum is 22.87%. The results of the strength of the claystone in receiving shear forces in the Kutai Basin are the Muara Jawa location 0.486MPa, Tanah Datar location 0.500 MPa, Sanga-sanga location 0.333 MPa, Muara Badak location 0.269, Air Putih location 0.711MPa, Mugirejo location 0.021 MPa and Lempake location 0.092 MPa.
Analisis Pengaruh Number of Cycles terhadap Pengujian Durability Slake Batulempung pada Formasi Balikpapan dan Formasi Kampung Baru Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Muhammad Ashar Alias Suara; Tommy Trides; Rety Winonazada; Revia Oktaviani; Windhu Nugroho; Lucia Litha Respati; Henny Magdalena
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 3 No. 3 (2025): 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.v3i3.957

Abstract

Durability is defined as a measure of a rock's resistance to weathering and disintegration when the rock undergoes weathering processes over a short period of time. The susceptibility of rocks to disintegration is related to their low durability. Rock durability is often measured using the slake durability test. The slake durability test is widely used to assess physical changes resulting from wetting-drying processes (Franklin and Chandra, 1972). Therefore, slake durability testing is conducted to understand the weathering of rocks caused by heat and water, particularly clay stones which are one of the constituent rocks on a slope. The sampling location is around Sanga-sanga and Muara Badak. Sampling was conducted with coordinate points and the Balikpapan and Kampungbaru formations. The claystone samples taken were then brought to the Mineral and Coal Technology Laboratory of the Engineering Faculty of Mulawarman University for Slake Durability tests. In this study, the lowest index value obtained was 45.7% and the highest value was 93%, indicating high to very high durability. The difference in the durability index values of claystone at the research locations indicates the presence of variables that can affect the slake durability index values of the claystone in the Balikpapan and Kampungbaru formations, including grain size and mineral content as well as geological conditions at the research site. Based on the results of the claystone durability tests, the durability index value (Id2) was obtained, indicating that the sandstone at the research location falls into the classification of high to low.
Analisis Konsumsi Bahan Bakar Alat Gali Muat-Angkut pada Kegiatan Pengupasan Overburden PIT Seloklai: PT. Mitra Indah Lestari Kota Samarinda Roland Fatar Fernados Sirait; Albertus Juvensius Pontus; Agus Winarno; Harjuni Hasan; Henny Magdalena; Revia Oktaviani
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 3 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i3.844

Abstract

Fuel consumption is a necessity in moving mechanical equipment, where fuel consumption is influenced by road conditions, horsepower, and load factors. PT. Mitra Indah Lestari uses Hyundai 480 and Sany750-H excavators. The transport equipment used is Wechai WT90, Tonly TLD90, and Quester CWE 330. This study uses a quantitative method and obtains fuel consumption results, where the fuel consumption of the Hyundai 480 and Sany 750-H excavators is 37.89 liters/hour and 59.91 liters/hour, respectively. The fuel consumption of the Wechai WT90, Tonly TLD90, and Quester CWE 330 transport equipment is 25.19 liters/hour; 27.53 liters/hour; and 10.66 liters/hour, respectively.
Analisis Nilai California Bearing Ratio (CBR) Terhadap Tebal Lapisan Jalan Tambang pada Pit Selatan PT. Bina Sarana Sukses Site PT. Baramulti Suksessarana Sahrul Ramadhana; Revia Oktaviani; Lucia Litha Respati; Agus Winarno; Windhu Nugroho
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 3 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i3.933

Abstract

Mining roads play an important role in supporting the smooth running of mining activities, especially in the process of transporting materials. The bearing capacity of the soil as a road subgrade greatly affects the stability and resistance of the road to heavy equipment loads. This study aims to analyze the effect of the plasticity index and compaction parameters on the California Bearing Ratio (CBR) value, as well as to determine the thickness of the road layer based on the laboratory CBR value. Testing was carried out at the South Pit of PT. Bina Sarana Sukses site PT. Baramulti Suksessarana with a field test method using the Dynamic Cone Penetrometer (DCP) and laboratory tests such as proctor tests, Atterberg limit tests, and CBR tests on various variations of clay and sand soil mixtures. The results showed that increasing the plasticity index decreased the CBR value, while increasing the maximum dry density and decreasing the optimum water content increased the CBR value. Based on the laboratory CBR value, recommendations were obtained for the appropriate road layer thickness to ensure optimal bearing capacity for heavy equipment passing through the research area.
Analisis Jarak Lemparan Flyrock Terhadap Radius Aman Alat 150 Meter Di Pit 40 Sentuk PT Multi Harapan Utama, Kecamatan Loa Kulu, Kabupaten Kutai Kartanegara, Kalimantan Timur: Analisis Jarak Lemparan Flyrock Desi Permatasari; Tommy Trides; Shalaho Dina Devy; Revia Oktaviani
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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

Abstract

Flyrock adalah fragmentasi batuan yang terlempar ke segala arah akibat dari kegiatan peledakan. Ukuran flyrock yang cukup besar dan melewati batas aman yang ditentukan akan menimbulkan kerusakan bagi alat, bangunan sekitar, maupun cidera pada manusia. Oleh karena itu, penelitian ini dilakukan untuk mengetahui jarak flyrock maksimum, parameter yang paling berpengaruh serta evaluasi dari parameter terbesar penyebab flyrock. Untuk memprediksi lemparan flyrock teoritis menggunakan teori Richard & Moore dan Ebrahim Ghasemi. Hasil penelitian didapatkan jarak flyrock maksimum berdasarkan perhitungan aktual yaitu 119,42 meter, berdasarkan perhitungan teoritis menurut Richard & Moore mekanisme face burst yaitu 241,42 meter, mekanisme cratering yaitu 105,51 meter dan teori Ebrahim Ghasemi yaitu 83,03 meter. Teori Ebrahim Ghasemi memiliki keakuratan paling tinggi di antara metode lainnya dengan nilai RMSE sebesar 23,58 meter dan MAPE sebesar 36,53%. Faktor terbesar penyebab jauhnya lemparan flyrock yaitu powder factor, sehingga dilakukan analisis untuk mendapatkan jarak lemparan flyrock maksimum 75 meter agar radius aman alat 150 meter, maka penggunaan powder factor maksimum yang digunakan yaitu 0,24 kg/m3.
Analisis Pengaruh Arah Lemparan Batuan Berdasarkan Initiation Point Terhadap Ground Vibration Pada Aktivitas Peledakan Di Pit Blok Osor Timur PT. Katika Selabumi Mining Kabupaten Kutai Kartanegara: Analisis Ground Vibration Suhari, Josh Immanuel Stevano; Revia Oktaviani; Albertus Juvensius Pontus
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Ground vibrations are waves that occur in the ground caused by an energy source. Ground vibrations due to blasting activity can affect buildings around the blasting area, including residential areas. Large peak particle velocity (PPV) can cause damage to people's homes. Data collection was carried out by dividing the data population into two, the direction of rock throwing based on the initiation point away from the measurement point and the direction of rock throwing based on the initiation point approaching the measurement point. During the research, values ​​were obtained PPV maximum is 3.03 mm/s with the initiation point close to the measurement point and there is a free face and walls at the blasting location, the PPV minimum of 0.4 mm/s with the initiation point away from the measurement point and there is a free face at the blasting location. Based on the results of calculating the predicted PPV value, an error percentage of 15.74% was obtained with the actual PPV value at the research location. From the results of the analysis and calculations, it was found that the direction of the rock throw with the initiation point closer to the measurement point had a greater value.
Analisis Kemampugaruan Batuan Berdasarkan Metode Seismic Pada Penambangan Batupasir Provinsi Kalimantan Timur : Analisis Kemampugaruan Batuan Bayu Indra Dermawan; Agus Winarno; Shalaho Dina Devy; Tommy Trides; Revia Oktaviani
Retii 2024: Prosiding Seminar Nasional ReTII ke-19 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

In mining activities, high risk is one of the main aspects that must be anticipated, especially regarding the geomechanical complexity of the rocks being excavated. Selecting the right excavation method can greatly impact operational efficiency and safety. In this context, direct digging, ripping, and blasting are the three main options, tailored to the characteristics of the rock.To determine the most suitable method, a rock rippability study is essential. This study can be conducted using direct or indirect methods. In this research, the seismic method was used to assess rock strength based on the seismic wave velocity, which was recorded at 1437.80 m/s. This value serves as a reference for selecting appropriate equipment for ripping activities.Given these characteristics, the recommended equipment for ripping is the D8T/D8R dozer from Caterpillar or the D275A/D275AX dozer from Komatsu. This equipment choice is based on its capability to handle rocks with strength levels reflected by the measured seismic wave velocity.
Studi Pengaruh Geometri Peledakan terhadap Biaya Pemboran dan Biaya Peledakan pada PT Unggul Dinamika Utama Kabupaten Kutai Timur Provinsi Kalimantan Timur Berliani Wahyu Ningrum; Tommy Trides; Rety Winonazada; Revia Oktaviani; Lucia Litha Respati
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 5 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i5.1158

Abstract

This study aims to analyze the effect of blasting geometry on drilling and blasting costs in mining operations at PT Unggul Dinamika Utama, Kutai Timur Regency, East Kalimantan Province. The research focuses on comparing two operational areas, namely PIT Tempudo 6 and PIT East, which apply different blasting geometries: a burden of 7 m and spacing of 8 m at PIT Tempudo 6, and a burden of 8 m and spacing of 9 m at PIT East. The research method involved collecting primary data from actual field drilling and blasting activities, as well as secondary data from the company. The parameters analyzed included blasting geometry, explosive consumption, and operational costs of drilling and blasting. The results show that the total drilling cost at PIT Tempudo 6 was Rp. 215,689,696, while at PIT East it was Rp. 162,177,899. The total blasting cost at PIT Tempudo 6 reached Rp. 3,023,066,977.60, while at PIT East it was Rp. 1,780,839,602.80. Thus, the total operational cost of blasting activities at PIT Tempudo 6 amounted to Rp. 3,238,756,673.60, and at PIT East amounted to Rp. 1,943,017,501.80. It can be concluded that differences in blasting geometry significantly affect operational cost efficiency. Larger burden and spacing values lead to more efficient costs by reducing the number of drill holes and explosive consumption per blasted rock volume.
Analisis Perbandingan Metode Peledakan Normal Dengan Peledakan Top Air Deck Pada Kolom Stemming Berdasarkan Fragmentasi dan Digging Time Di Pit Sentuk PT Multi Harapan Utama Sitti Nur Amila; Lucia Litha Respati; Revia Oktaviani
Jurnal Pertambangan dan Lingkungan Vol 5, No 1 (2024): Juni 2024
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpl.v5i1.24402

Abstract

PT Multi Harapan Utama merupakan perusahaan pertambangan yang menerapkan teknik peledakan untuk membongkar lapisan batuan penutup (overburden). Pada pelaksanaannya di pit Sentuk terdapat dua metode peledakan yaitu peledakan normal dan peledakan top air deck. Perbedaan metode tersebut adalah secara geometrinya peledakan top air deck sebagian kolom stemming diganti dengan rongga udara dengan menggunakan media balldeck, yang berada diantara kolom isian dan stemming, yang bertujuan untuk mempercepat proses kegiatan peledakan tanpa menunggu waktu gassing dengan tetap menghasilkan fragmentasi batuan hasil peledakan yang baik dan mengurangi digging time Cat 6030 sesuai target perusahaan. Penelitian ini dilakukan masing-masing sebanyak 7 kali peledakan dengan membandingkan peledakan normal dan peledakan top air deck berdasarkan data aktual fragmentasi dan digging time. Pada peledakan normal didapatkan rata-rata fragmentasi yang lolos < 50 cm adalah 89.29 % yang berarti peledakan normal tidak mencapai target perusahaan yaitu fragmentasi lolos < 50 cm sebesar 90 %. Sedangkan rata-rata fragmentasi peledakan top air deck adalah 98.77 %. Fragmentasi peledakan top air deck dapat dikatakan lebih efektif dan mampu mencapai target perusahaan. Selain itu, juga dapat mengurangi digging time dimana peledakan normal adalah 11.56 detik dan peledakan top air deck adalah 10.88 detik.
Studi Pengaruh Lama Penumpukan Batubara terhadap Kualitas Proximate Batubara di ROM Coal Stockpile pada PT Multi Harapan Utama Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Ronal Ronal; Windhu Nugroho; Revia Oktaviani; Agus Winarno; Ardhan Ismail
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 6 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i6.1218

Abstract

During the coal stockpiling process, the quality of coal may increase or decrease due to direct exposure to open environmental conditions, which can lead to changes in its characteristics. The longer the coal is stored in an open area, the more it undergoes changes caused by rainfall, heat, and air exposure, resulting in an increase in moisture content and ash content, while the calorific value decreases. Therefore, this research was conducted to determine the optimal coal stockpiling duration at the ROM coal stockpile to ensure that the calorific value does not significantly decrease. Coal sampling was carried out every two days from the initial time of stockpiling. After a two-month stockpiling period, the final coal quality results showed a total moisture of 13.89% (ar), inherent moisture of 15.95% (ad), ash content of 4.59% (ad), volatile matter of 40.3% (ad), and fixed carbon of 39.16% (ad). Based on these results, it can be concluded that the recommended storage duration for MCV-HS type coal at the ROM coal stockpile is 154 days. The laboratory analysis results obtained during the research indicate that the longer the coal is stored, the higher the moisture content and ash content become, while the calorific value continues to decrease. This occurs due to water absorption and oxidation reactions that take place during the coal storage period in the ROM coal stockpile.
Co-Authors Adin anugrah Agus Winarno Albert Juvensius Pontus Albertus Juvensius Albertus Juvensius Pontus Albertus Pontus Aldicho Alfiandy Suhendik Amarullah Amarullah Anandyta Suci Ramdani Andreas Marojahan Gurning Anggi Permatasari Ardhan Ismail Arya Mu’min Wally Bayu Indra Dermawan Berliani Wahyu Ningrum Desi Permatasari Dwi T. S. Fambudi Harjuni Hasan Henny Magdalena Juan, Juan Kasbillah Kasdi Kasdi Ketut Swarningsih Koeshadi Sasmito Lucia Litha Lucia Litha Respati Lucia Litha Respati M. Dwi Triosusanto Melki Marten Muhammad Aji Satria Mandiri Muhammad Ashar Alias Suara Muhammad Hafidz Muhammad Hamzah Muhammad Iksan Hamsyah MUHAMMAD ILHAM Muhammad Rahul Shidiq Muhlisin Efendi Nurfitri Kasran Nurul Idar Ilahi Bakti Rety Winonazada Roland Fatar Fernados Sirait ronal ronal Sahrul Ramadhana Sakdillah S Shalaho Dina Devy Sitti Nur Amila Sri Wahyuni Suhari, Josh Immanuel Stevano Tommy Aria Pradana Tommy Trides windhu Nugroho Yuana Saputra