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Revia Oktaviani
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Analisis Rebound Number dan Sifat Fisik Batuan Sandstone di Samarinda Ulu Kalimantan Timur Muhammad Hamzah; Tommy Trides; Revia Oktaviani; Lucia Litha Respati; Albertus Juvensius
Dewantara Journal of Technology Vol. 5 No. 1 (2024)
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v5i1.302

Abstract

Karakterisasi sifat mekanik batuan merupakan aspek penting dalam kegiatan pertambangan, terutama untuk mendukung perencanaan geoteknik dan evaluasi kestabilan massa batuan. Pengujian kuat tekan uniaksial (Uniaxial Compressive Strength/UCS) umumnya digunakan untuk menilai kekuatan batuan, namun metode ini memerlukan waktu dan biaya yang relatif besar. Oleh karena itu, uji non-destruktif menggunakan Schmidt Hammer dengan parameter rebound number banyak diterapkan sebagai alternatif yang lebih praktis. Penelitian ini bertujuan untuk menganalisis pengaruh sifat fisik batuan, yaitu kadar air, porositas, dan derajat kejenuhan, terhadap nilai rebound number. Metode penelitian meliputi pengujian Schmidt Hammer dan pengujian sifat fisik batuan di laboratorium, yang selanjutnya dianalisis secara deskriptif dan korelasional. Hasil penelitian menunjukkan bahwa peningkatan kadar air, porositas, dan derajat kejenuhan cenderung menurunkan nilai rebound number. Temuan ini mengindikasikan bahwa kondisi fisik batuan memiliki peran penting dalam interpretasi nilai rebound number. Dengan demikian, penggunaan Schmidt Hammer sebagai alat estimasi sifat mekanik batuan perlu mempertimbangkan pengaruh sifat fisik batuan agar hasil yang diperoleh lebih akurat dan representatif.
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 (2022): Educational Building: Jurnal Pendidikan Teknik Bangunan dan Sipil
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
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

Abstract

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).
Analisis Upper Bound dan Lower Bound pada Kuat Tekan Batupasir Formasi Balikpapan dan Pulau Balang dengan Metode Uniaxial Compressive Strength, Point Load Index dan Schmidt Hammer Aisyatur Ridho; Tommy Trides; Rety Winonazada; Albertus Juvensius Pontus; Revia Oktaviani
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 3 (2026): Juni: 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.v4i3.1425

Abstract

Sandstone is one of the sedimentary rock types widely utilized in mining activities; therefore, its mechanical characteristics, particularly uniaxial compressive strength, need to be determined. This study aims to analyze the compressive strength of sandstone from the Balikpapan and Pulau Balang Formations using the Uniaxial Compressive Strength (UCS), Point Load Index (PLI), and Schmidt Hammer methods. Sampling and Schmidt Hammer testing were conducted in the field, while physical property tests, UCS tests, and PLI tests were carried out in the laboratory. The results indicate that the compressive strength of sandstone from the Pulau Balang Formation is higher than that of the Balikpapan Formation, with values ranging from 18.30–44.11 MPa and 10.05–39.51 MPa, respectively. The relationship between PLI and UCS for the Balikpapan Formation is expressed by the regression equation UCS = 16.569(Is50) with R² = 0.78, whereas for the Pulau Balang Formation the equation is UCS = 8.2664(Is50) with R² = 0.76. The regression equations were further complemented with upper and lower bounds based on the margin of error. In addition, the Rebound Number (Rn) exhibited a positive linear correlation with UCS, with coefficients of determination (R²) of 0.89 for the Balikpapan Formation and 0.98 for the Pulau Balang Formation. These findings indicate that higher UCS values correspond to higher Rebound Number values.            
Evaluasi Powder Factor terhadap Jarak Lemparan Flyrock dengan Teori Ebrahim Ghasemi pada Hasil Peledakan di PT Bukit Baiduri Energi Provinsi Kalimantan Timur Perdi Perdi; Lucia Litha Respati; Albertus Juvensius Pontus; Revia Oktaviani; Tommy Trides
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 4 (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.v4i4.1493

Abstract

Blasting activities in coal mining are carried out to fragment overburden material and improve excavation efficiency. However, blasting operations may generate environmental impacts, one of which is flyrock, which can endanger equipment, facilities, and personnel. This study aims to evaluate the influence of blasting geometry and powder factor on flyrock distance and to compare actual flyrock distances with predictions using the Ebrahim Ghasemi method at PT Bukit Baiduri Energi, East Kalimantan. The research was conducted through direct field measurements of blasting geometry parameters, including burden, spacing, stemming, free-face burden, and hole depth from 30 blasting events. The results showed that the actual flyrock distance had an average value of 25.37 m with a maximum distance of 47.01 m, while the Ebrahim Ghasemi prediction method produced an average distance of 24.70 m with a maximum distance of 40.80 m. Correlation analysis indicated that powder factor was the most influential parameter affecting flyrock distance, with a correlation coefficient (r) of 0.93 and a coefficient of determination (R²) of 0.8664, indicating a very strong relationship. An increase in powder factor tends to increase the flyrock distance. Therefore, proper control of blasting geometry and powder factor is essential to minimize flyrock risk and improve blasting safety.
Co-Authors Abdul Malik Abdul Rijal Mukmin Achmad Faisal Achmad Jefry Yandus Afdal Jamil Tanjung Agus Winarno Agus Winarno Agus Winarno, Agus Ainayah Al Fatihah Aisyatur Ridho Akbar Ilham Albertus J Pontus Albertus Juvensius Albertus Juvensius Pontus Anakta Hartanta sebayang Ardhan Ismail Arif Setiawan Ashabul Kahfi, Ashabul Azzahra, Siti Maghfirah Benny Christian BB Bryan Andreas Turnip Budi Utama, Yogi D. Devy, Shalaho Dea Mierela Ananda Deni Saldi Dina Devi, Shalaho Dina Devy, Shalaho Dionisyus Fransiskus Sinaga Fernando Lawangan Ginting, Emdananta Gunawan Manullang, Ronal Edi Harjuni Harjuni Hasan Harjuni Hasan Haviluddin Haviluddin Henny Magdalena Irianta Ibo Sembiring Irvan Erika Pangestu Irvantoni Simbolon, Desron Jaba, Yafet Joe Vandame Juvensius Pontus, Albert Juvensius Pontusi, Albertus Kasbillah, Kasbillah Ketut Swarningsih 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 Lucia Litha Respati Lucia Litha Respati M. Rijal, M. Mardan Ali Masayu Widiastuti Milda Milda Muhammad Hamzah Muhammad Rayhan Fhadillah Musodiq Musodiq Natasya Amanda Putri Nimsi, Yekeskiel Nugroho, Windhu Nur Aqsa Syahban Irwan Nur Qorima Azis Nur, Al Maida Nurhidayat, Royan Perdi Perdi Putri Lufian Tika Rabin Daruis Rafael Bonardy Gultom Respati, Lucia Litha Rety Winonazada Ronald Alvin Ifnie, Jones S. Depari, Raja Kami Sandri Tandi Rapang Satria Bekti, Nanda Shalaho Dina Devy Shalizam, Shalizam Sharon Tria Kurniawati Silaban Silalahi, Abdi Brema Sitepu, Joe Vandame Situmorang, Ardo P Sokisha, Sokkia Suhaila Ridwan Suharni Suharni Supriyanto Supriyanto Tommy Trides Tommy Trides Tommy Trides Tommy Trides Tommy Trides Tommy Trides Tommy Trides Trides, Tommy Vandrianus Felix Feto Nuwa W. S. Gumilang, W. S. Gumilang Wahyu Garini, Andini Dwi Windhu Nugrho Windhu Nugroho windhu Nugroho Windhu Nugroho windhu Yekeskiel Nimsi Yufita, Zaenul