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Revia Oktaviani
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Studi Kestabilan Lereng Sandstone dengan Metode Bishop Simplified di Samarinda Ulu, Kalimantan Timur Muhammad Hamzah; Tommy Trides; Revia Oktaviani; Lucia Litha; Albertus Juvensius
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.v3i6.1226

Abstract

A research about study of sandstone slope stability using the Bishop Simplified method in Uu Samarinda has been conducted. This study was conducted to analyze the rebound number values of sandstone slopes, evaluate their stability level, and calculate the safety factor using the Bishop method. The results showed that the rebound number values were 22.34 at point 1, 19.83 at point 2, and 18.07 at point 3. The Uniaxial Compressive Strength (UCS) values at the observation points were 1.90 MPa, 1.62 MPa, and 2.21 MPa, respectively. Geological Strength Index (GSI) evaluation indicated a rating of 80–85, demonstrating intact/massive rock structure, fresh and unweathered rock surfaces, and very good rock quality. Based on the Bishop method analysis, the slope factor of safety in 6.525 with a probability of failure is 0.000%, indicating that the sandstone slope in Ulu Samarinda is highly stable even under external pressures such as heavy rainfall or minor earthquakes. This study provides crucial information on the mechanical characteristics and stability of sandstone slopes in ulu Samarinda, which can serve as a reference for technical planning, geotechnical risk mitigation, and the sustainable development of safe areas.
Analisis Risiko dengan Pendekatan Semi-Kuantitatif untuk Stabilitas Lereng Highwall pada PIT B1 PT. Pancaran Surya Abadi Kabupaten Kutai Kartenegara Melki Marten; Revia Oktaviani; Windhu Nugroho; Tommy Trides; Albertus Juvensius Pontus
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 1 (2026): April: Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i1.7628

Abstract

Guaranteeing the geotechnical stability of slopes is an absolute prerequisite for the sustainability of open pit mining operations, considering the potential for multidimensional losses due to slope failure. The specific geological conditions at PIT B1 PT. Pancaran Surya Abadi, which is composed of sedimentary rocks (coal, sandstone, and claystone), are susceptible to degradation and softening, especially due to high rainfall that causes an increase in pore water pressure and a decrease in rock shear strength. This study aims to analyze the stability of highwall slopes using the Morgenstern-Price Method to determine the Safety Factor (SFF) value according to Ministerial Decree number 1827 K/30/MEM/2018, and continued with a semi-quantitative risk analysis. The analysis results show that the initial slope has a static SFF of 0.77 (Not Safe). After redesign, the recommended optimal single slope geometry is: sandstone (Height 5 m, Angle 20°, Berm 5 m) and claystone (Height 10 m, Angle 60°, Berm 5 m). This redesign resulted in a FK of 1.34 (Safe). Sensitivity analysis to groundwater level rise (GTL) showed that the GTL value remained safe (GTL ≥1.30) up to a 30% increase in GTL. However, a 40% to 80% increase in GTL caused the GTL to decrease (1.28–1.21), classified as Medium Risk. A 100% increase in GTL drastically reduced the GTL to 1.05, classified as High Risk. This study emphasizes the need for close monitoring and additional drainage to maintain the long-term stability of slopes under the influence of rainfall.
Studi Kehilangan Volume Batugamping pada Kegiatan Peledakan dan Crushing di PT. Yusrina Borneo Quantum Kecamatan Loakulu Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur Muhammad Aji Satria Mandiri; Revia Oktaviani; Agus Winarno; Tommy Trides; Windhu Nugroho
Bilangan : Jurnal Ilmiah Matematika, Kebumian dan Angkasa Vol. 3 No. 6 (2025): Desember : Bilangan : Jurnal Ilmiah Matematika, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/bilangan.v3i6.867

Abstract

Blasting and crushing are essential stages in the limestone mining process; however, both stages may contribute to material volume loss due to technical factors and geological conditions. This study aims to analyze the blasted volume, crushed volume, and the amount of volume loss occurring throughout these processes. The research utilizes primary data including blasting geometry, blasting patterns, crushing production, and secondary data such as regional geology and equipment specifications. Based on 15 blasting activities conducted from October to December 2024, the total blasted volume reached 71,691 tons with an average powder factor of 0.23 kg/m³. Meanwhile, the total volume produced from secondary crushing was 71,575 tons. The comparison indicates volume loss influenced by suboptimal fragmentation, rock characteristics, work efficiency of the crushing unit, and operational constraints in the field. The results of this study are expected to serve as a reference for optimizing blasting design and crushing operations to minimize volume loss and improve overall mining productivity.
Perencanaan Counterweight untuk Meningkatkan Kestabilan Lereng dan Kapasitas Disposal pada Area Disposal T4 PT Unggul Dinamika Utama Provinsi Kalimantan Timur Nurfitri Kasran; Revia Oktaviani; Ardhan Ismail; Tommy Trides; Albert Juvensius Pontus
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 1 (2026): Februari: 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.v4i1.1318

Abstract

The stability of disposal slopes is a critical aspect of open-pit mining operations because it directly affects operational safety and the continuity of overburden dumping activities. Disposal areas composed of overburden materials generally exhibit heterogeneous characteristics, particularly when soft materials such as mud are present, which can significantly reduce slope stability. Therefore, a comprehensive slope stability evaluation is required prior to further disposal development. This study aims to assess the stability condition of a disposal slope under initial conditions, evaluate the influence of material conditions, and analyze the effectiveness of counterweight application in improving both the safety factor and disposal capacity. The research methodology involved the collection of primary and secondary data, including slope geometry, lithological conditions, and the physical and mechanical properties of disposal materials obtained from laboratory testing and company technical data. Slope stability analysis was performed using the limit equilibrium method with the assistance of geotechnical software, taking into account groundwater conditions and operational loading. The analysis results indicate that the initial disposal condition yielded a safety factor of 0.718, indicating an unstable slope condition. After simulating the removal of mud material, the safety factor increased to 0.907 but remained below acceptable stability criteria. The application of a counterweight significantly improved slope stability, resulting in a safety factor of 1.498. Further optimization through slope geometry redesign produced a final safety factor of 1.101, which satisfies the requirements stipulated in KEPMEN ESDM No. 1827 K/30/MEM/2018. Additionally, the redesign increased the disposal capacity from 119,507,864.23 LCM to 119,682,378.22 LCM, representing an increase of 174,513.99 LCM. These results demonstrate that counterweight application combined with geometric optimization is effective in enhancing both slope stability and disposal capacity.
Analisis Pergerakan Lereng Tambang Menggunakan Alat CHCNAV PS 2000 di PT Insani Bara Perkasa Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Muhammad Iksan Hamsyah; Revia Oktaviani; Lucia Litha Respati; Tommy Trides; Agus Winarno
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 1 (2026): 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.v4i1.1301

Abstract

Mine slopes play a crucial role in ensuring the safety and sustainability of mining activities. Continuous mining operations can alter slope conditions, thereby increasing the potential for instability and slope failures. Slope stability is influenced by the balance between resisting forces and driving forces acting on the rock mass. When the resisting forces are smaller than the driving forces, the slope becomes unstable and failure may occur. Therefore, slope stability analysis is essential to prevent landslide hazards, as it directly affects occupational safety, equipment security, other assets, and overall production continuity. These conditions have encouraged PT Insani Bara Perkasa to develop a more accurate and real-time slope monitoring system. The application of radar-based monitoring was initiated using the CHCNAV PS-2000 system. This study aims to analyze the deformation behavior of mine slopes using radar technology. Data acquisition was conducted at Pit K1 Mahakam, PT Insani Bara Perkasa, covering Area 1 South, AR 2 South, AR 3 South, AR 5 South, AR 6 South, AR 7 West, AR 8 West, AR 9 South, AR 13 South, as well as TA-2, TA-3, and TA-6 areas. The study was carried out from November 2025 to December 2026. The analysis results indicate that most monitoring points are in stable conditions, with indications of a progressive phase observed in the AR 6 South area.
Analisis Karakteristik Tanah Berdasarkan Uji Lapangan Sondir (Cone Penetration Test) & Uji Laboratorium pada PIT North PT Karya Putra Borneo Yuana Saputra; Revia Oktaviani; Rety Winonazada; Tommy Trides; Albertus Juvensius Pontus
Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Vol. 4 No. 1 (2026): Februari: 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.v4i1.1329

Abstract

This study aims to analyze the characteristics of the soil at PIT North with two highwall and lowwall locations at PT Karya Putra Borneo, Kutai Kartanegara Regency, East Kalimantan Province. The research method was carried out by collecting primary data from the results of field tests using the sondir method with the Cone Penetration Test(CPT) tool and laboratory tests using physical properties, specific gravity, grain size, soil consistency, and consolidation tests, as well as secondary data from the results of literature studies. The parameters analyzed for soil characteristics include the sondir cone resistance (qc) value, grain size fraction distribution, soil plasticity index, and the rate of land subsidence through consolidation. The results showed that at PIT North the highwall area had a qc value of 5.6 Mpa, Fr 0.2%, IP 8.06%, Cc 1, a large rate of land subsidence of 3.3 mm with a settlement period of 4 years. In the lowwall area with a qc value of 10.31 Mpa, Fr 0.16%, IP 6.39%, Cc 0.535, the rate of settlement was 4.4 mm with a settlement period of 3 years. From these results, it is concluded that the soil at the highwall and lowwall locations has different compressibility, seeing the different soil Cc values and the soil plasticity index that affect the compressibility level of the soil and the value of the land settlement rate.
Studi Pengaruh Derajat Kejenuhan Terhadap Kuat Geser Tanah Anandyta Suci Ramdani; Revia Oktaviani; Ardhan Ismail; Tommy Trides; Albertus Juvensius Pontus
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 1 (2026): 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.v4i1.1341

Abstract

Soil strength characteristics are strongly influenced by its physical and mechanical properties, one of which is shear strength. Soil shear strength is affected by cohesion (c), internal friction angle (ϕ), and soil moisture conditions. In open-pit mining conditions, soil moisture content is greatly influenced by rainfall and water seepage, which can increase the degree of saturation within the soil mass. An increase in the degree of saturation generally leads to a rise in pore water pressure, thereby reducing the effective normal stress and resulting in a decrease in soil shear strength. This study aims to determine the effect of the degree of saturation on soil shear strength. This research employs a quantitative method to analyze the influence of the degree of saturation under three conditions (natural, dry, and saturated) on soil shear strength through laboratory testing using the direct shear test. The tests conducted include soil physical properties testing in accordance with SNI 1965-2008, specific gravity testing based on SNI 1964-2008, and soil shear strength testing following SNI 3420-2016. The results indicate that the average degree of saturation under natural conditions is 64.63% with a cohesion value of 7.4 kN/m², under dry conditions is 33.18% with a cohesion value of 8.2 kN/m², and under saturated conditions is 83.08% with a cohesion value of 3 kN/m². It can be concluded that a higher degree of saturation or more saturated soil samples result in lower cohesion values, whereas a lower degree of saturation or drier soil samples lead to higher cohesion values.
PENGGUNAAN FOTO UDARA UNTUK MONITORING LERENG TIMBUNAN IPD PIT 1 LAHAN PASCATAMBANG PT MEGAPRIMA PERSADA Sumarlin Sumarlin; Ibrahim Ibrahim; Yunianto Setiawan; Revia Oktaviani; Pangea Ghiyats Sabrian
JURNAL TEKNIK GEOLOGI : Jurnal Ilmu Pengetahuan dan Teknologi Vol 8, No 2 (2025): Jurnal Teknik Geologi : Ilmu Pengetahuan dan Teknologi
Publisher : Teknik Geologi Fakultas Teknik Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jtgeo.v8i2.25604

Abstract

Salah satu tantangan utama dalam pascatambang adalah pemantauan stabilitas lereng timbunan. Penelitian ini bertujuan untuk menganalisis tingkat ketelitian penggunaan foto udara dari Unmanned Aerial Vehicles (UAV) dalam mengidentifikasi lereng timbunan lahan pascatambang, dengan pendekatan kuantitatif berbasis parameter spasial. Dari hasil penelitian penggunan drone/UAV dalam kegiatan identfikasi lereng lahan pascatambang IPD (In pit dump) Pit 1 lahan pascatambang PT Megaprima berdasarkan ketentuan (standart) yang berlaku didapat nilai  CE90 yang dihasilkan nilai horisontal adalah 0,64 meter dan nilai LE90 ketetlitian secara vertikal adalah 2,02 meter secara ketentuan masih masuk dalam Kelas 1 pada ketelitian horizontal dan masuk kedalam kelas 3 ketetlitian secara vertikal. Dari data spasial yang dihasilkan dari pemetaan menggunakan drone atau UAV pada daerah peneltian IPD Pit 1 berdasarkan analisis ulang (back analysis) geoteknik nilai Faktor Keamanan (FK) adalah 0,77 dalam kondisi FK Dinamis pada salah titik lereng timbunan yang diteltiti, sehingga jika mengacu kepada ketentuan Kepmen ESDM nomor : 1827.K/30/MEM/2018 masuk kedalam kataegori keparahan konsekuensi tinggi. Secara lingkungan daerah peneltian masih terdapat void, kurangnya vegetasi yang menutupi, banyak terbentuk gulir erosi dan dekat dengan pemukiman Masyarakat serta daerah penelitian merupakan lereng timbunan yang terbentuk pada lubang bekas tambang seluas 70 Ha.
Permodelan hidrogeologi kondisi natural pada daerah luyo kabupaten polewali mandar provinsi sulawesi barat Nur Aqsa Syahban Irwan; Shalaho Dina Devy; Albertus Juvensius Pontus; Revia Oktaviani; Agus Winarno
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 7 No. 5 (2026)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol7iss5pp741-752

Abstract

The Luyo area, Polewali Mandar Regency, West Sulawesi Province, has a high dependence on groundwater as the main source of water for domestic and community activities. Increasing groundwater utilization may potentially disturb the natural hydrogeological balance if it is not properly managed. Therefore, a comprehensive understanding of natural hydrogeological conditions is essential as a basis for sustainable groundwater management. This study aims to determine the hydrogeological conditions of the study area, the natural groundwater balance, and the groundwater flow pattern and hydraulic head distribution through natural-condition hydrogeological modeling. The research methods include hydrological analysis, groundwater level measurements, electrical resistivity surveys using the Schlumberger configuration, pumping tests, and steady-state numerical groundwater modeling based on conceptual and mathematical approaches. The results indicate that the hydrogeological system in the study area consists of unconfined and semi-confined aquifers controlled by local lithological and geomorphological conditions. The natural groundwater balance shows that the study area remains in a relatively balanced condition, with groundwater recharge primarily derived from rainfall infiltration. Groundwater flow generally follows the topography, moving from recharge areas toward discharge zones such as rivers and springs. Model calibration results show good agreement between simulated and observed hydraulic heads. The developed natural-condition hydrogeological model is expected to serve as a baseline reference for evaluating future changes in the groundwater system due to human activities and environmental changes
Analisis Pengaruh Penggunaan Air Deck Terhadap Ground Vibration pada Aktivitas Peledakan di Pit Sentuk PT Multi Harapan Utama Provinsi Kalimantan Timur Dimas Daffa Erlangga; Revia Oktaviani; Lucia Litha Respati; Tommy Trides; Windhu Nugroho
Jurnal Kendali Teknik dan Sains Vol. 3 No. 1 (2025): Januari: Jurnal Kendali Teknik dan Sains
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/jkts-widyakarya.v3i1.4665

Abstract

Blasting is an activity that breaks rocks from their parent rock using explosives to create smaller fragments, making the loading and transportation processes easier. One of the environmental impacts of blasting activities is ground vibration. Ground vibration is one of the outcomes of blasting activities, and it is measured using the PPV (Peak Particle Velocity) value. Ground vibration can become a problem for companies if it exceeds the safe vibration quality standard (SNI 7571: 2010), as it can pose a danger to humans and nearby buildings. The Air Deck is an air column in the blast hole that aims to reduce energy vertically, this method can reduce the use of explosives. This research was conducted at the Sentuk Pit of PT. Multi Harapan Utama in East Kalimantan. Observations were made during 42 blast events to determine the impact of the air deck method on the resulting vibration. During the study, the maximum PPV value was 13.87 mm/s, while the minimum PPV value was 1.13 mm/s. The average ground vibration measurement value for non-air deck blasting was 4.40 mm/s, while the average ground vibration measurement value for air deck blasting was 3.95 mm/s. The use of this method also reduced the powder factor value. For non-air deck blasting, the average powder factor value was 0.26 kg/m³, and for air deck blasting, the powder factor value was 0.20 kg/m³, resulting in a 23.08% reduction in explosive usage. To calculate the predicted PPV, scaled distance calculations were used. Based on the predicted PPV calculation results, the deviation from the actual PPV was 1.59 mm/s.
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 Dimas Daffa Erlangga Dwi T. S. Fambudi Elsa Amanda Putri Harjuni Hasan Henny Magdalena Ibrahim Ibrahim 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 Nur Aqsa Syahban Irwan Nurfitri Kasran Nurul Idar Ilahi Bakti Pangea Ghiyats Sabrian Rety Winonazada Roland Fatar Fernados Sirait ronal ronal Sahrul Ramadhana Sakdillah S Shalaho Dina Devy Sitti Nur Amila Sri Wahyuni Suhari, Josh Immanuel Stevano Sumarlin Sumarlin Tommy Aria Pradana Tommy Trides windhu Nugroho Yuana Saputra Yunianto Setiawan, Yunianto