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All Journal Jurnal RISET Geologi dan Pertambangan Journal of Aceh Physics Society Jurnal Ilmiah Mahasiswa Teknik Kebumian Jurnal Sains dan Teknologi Reaksi Jurnal Natural International Journal of Disaster Management Aceh International Journal of Science and Technology Jurnal Teknik Sipil Acta Geoscience, Energy, and Mining

Ibnu Rusydy

Program Studi Teknik Geologi, Jurusan Teknik Kebumian, Fakultas Teknik, Universitas Syiah Kuala

Author-ID : 472711

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Neuroscience Physics Social Sciences Transportation

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ANALISIS KESTABILAN LERENG BATU DI JALAN RAYA LHOKNGA KM 17,8 KABUPATEN ACEH BESAR Ibnu Rusydy; Nafisah Al-Huda; Khaizal Jamaluddin; Devi Sundary; Gartika Setiya Nugraha
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 27, No 2 (2017)
Publisher : Indonesian Institute of Sciences

Penelitian kestabilan lereng batuan menggunakan metode analisis kinematik lereng dan klasifikasi massa batuan dilakukan di lereng pinggir jalan Banda Aceh – Calang di Km 17,8 di Kecamatan Lhoknga Kabupaten Aceh Besar. Penelitian ini bertujuan untuk mengetahui jenis longsoran yang akan terjadi di masa yang akan datang, menilai kualitas massa batuan pembentuk lereng, dan tingkat kestabilannya berdasarkan klasifikasi SMR. Akuisisi data struktur massa batuan dilakukan di sepanjang lereng menggunakan metode scanline. Data yang diambil berupa arah kemiringan bidang diskontinuitas, arah bidang, dan kondisi bidang diskontinuitas bidang berupa kemenerusan, kekasaran, bukaan, isian, luahan air dan tingkat perlapukan. Analisis kinematik lereng didapatkan berdasarkan hasil proyeksi stereografi dan analisis kualitas serta kestabilan lereng batuan berdasarkan parameter RMR dan SMR. Hasil analisis kinematik lereng menunjukkan jenis longsoran yang akan terjadi di lereng 1 berupa longsoran baji dan planar. Di lereng 2 dimungkinkan terjadinya longsoran gulingan/toppling karena bidang joint set yang berlawanan dengan arah lereng. Nilai RMR di lereng 1 sebesar 63 dengan kategori batuan Bagus dan RMR lereng 2 sebesar 57 kategori batuan sedang. Nilai SMR terendah di lereng 1 sebesar 29 (kategori Buruk) untuk longsoran planar dan 53 (kategori Sedang) di lereng 2 longsoran gulingan. Lereng 1 memiliki probabilitas kejadian longsor planar sebesar 60%.Rock slope stability was assessed using the slope kinematic analysis method and rock mass classification on the roadside slope of Banda Aceh - Calang at 17.8 Km in Lhoknga Sub-district, Aceh Besar District. This study aims to determine the types of landslides that will occur in the future by determining the Rock Mass Rating (RMR) and analyzing stability based on the Slope Mass Rating (SMR). The data acquisition of rock mass structures performed the scan line method along the slope. The data taken are the dip and the strike of the discontinuity plane, and the conditions of discontinuity in the form of persistence, aperture, roughness, infilling, weathering and Groundwater conditions. Slope kinematic analysis was conducted based on stereographic projection and analyses of both rock slope quality and stability were based on RMR and SMR parameters. The result of the slope kinematic analysis shows that landslides that occur in slope 1 will be in wedge and planar forms. On slope 2, possible failure is in the form of toppling due to the joint set positioned opposite to the slope direction. The RMR value in slope 1 is 63, categorized as Good rock and the RMR in slope 2 is 57, which is in the medium rock category. The lowest SMR value in slope 1 was 29 as a Bad class for planar failure, and 53 as a Normal category in slope 2 is toppling failure. Slope 1 has a 60 % probability of a planar failure event.

ANALISIS MODULUS DEFORMASI MASSA BATUAN PADA SEGMEN JALAN USAID KM 27 HINGGA KM 30 BERDASARKAN KLASIFIKASI MASSA BATUAN Ibnu Rusydy; Nafisah Al-Huda; M Fahmi; Naufal Effendi; Abrar Muslim; Mirna Lubis
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 1 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1073

Penelitian modulus deformasi dan klasifikasi massa batuan mengunakan sistem RMR (rock mass rating) dan GSI (geological strength index) telah dilakukan di Jalan Raya USAID km 27 hingga km 30. Lintasan jalan di daerah ini berada pada batuan yang mengalami deformasi akibat aktivitas tektonik sehingga pada bagian lereng badan jalan ditemukan rekahan-rekahan yang berpotensi longsor, maka diperlukan rekayasa lereng dengan menganalisis dan menilai klasifikasi massa batuan. Penelitian ini bertujuan untuk mengidentifikasi klasifikasi massa batuan dengan RMR (rock mass rating), GSI (geological strength index), dan besaran nilai modulus deformasi massa batuan yang terdapat pada batugamping lempungan. Metode penelitian yaitu dengan melakukan scanline untuk mengambil data orientasi struktur geologi untuk analisis kinematik lereng dan kondisi bidang diskontinuitas (kemenerusan, bukaan, kekasaran, isian, tingkat pelapukan dan kondisi keairan), termasuk kekuatan batuan utuh yang diambil dari lereng batuan untuk menghitung nilai RMR dan GSI. Pendekatan empiris dilakukan untuk mengestimasi nilai modulus deformasi berdasarkan nilai GSI. Hasil penelitian menunjukkan bahwa longsor batuan yang akan terjadi berdasarkan analisis kinematik adalah longsoran jenis planar, gulingan, dan baji. Nilai RMR masing-masing lereng 1, 2, 3 dan 4 adalah sebesar 60, 64, 60, dan 61, sementara nilai GSI sebesar 50, 51, 52 dan 54 secara berurutan. Nilai modulus deformasi massa batuan untuk batugamping lempungan sebesar 50 GPa untuk semua lereng. ABSTRACTS - Rock mass modulus deformation analysis in USAID highways segment km 27th to km 30th based on rock mass classifications. Rock mass modulus deformation and rock mass classifications utilizing RMR (rock mass rating) and GSI (geological strength index) have been conducted in USAID Highways segment from km 27th to km 30th where is built on the rocks which are highly influenced by tectonic force and deformed by tectonic activity; hence, the rock on the slopes are fractured, folded and potentially to failure. These circumstances need a rock engineering approach by applying rock mass classification methods. This research aims to identify the rock mass classifications based on RMR, GSI, and to estimate the rock mass modulus deformation working on rock slope of argillaceous limestone. Scanline approach was utilized in structural geology data acquisition for rock slope kinematic analysis and joints condition (persistence, aperture, roughness, infilling, weathering, and watering) included the strength of intact rock is obtained from rock slope in calculating the RMR and GSI ratings. The empirical approach was deployed in estimating the rock mass modulus deformation based on GSI value. Rock slope kinematic analysis reveals the possibility of rock failure that will be occurred on the slopes are plane, toppling, and wedge failures. The total RMR ratings are 60, 64, 60, and 61 for slope 1, 2, 3, and 4, while the total GSI values are 50, 51, 52, and 54 respectively. Rock mass modulus deformation for argillaceous limestone in this study area is 50 GPa for every slope.

Delineation of Gold Prospecting Area Based on Total Magnetic Field Anomalies Reduction to The Pole Alvin Caesar Lesmana Ikramsyah; Nazli Ismail; Ibnu Rusydy; Agus Pajrin Jaman
Journal of Aceh Physics Society Volume 7, Number 3, September 2018
Publisher : PSI-Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (751.352 KB)

Telah dilakukan reduksi ke kutub data anomali medan magnetik total untuk mendelineasikan area prospek emas. Intensitas medan magnetik total dikoreksi dengan nilai diurnal dan IGRF untuk mendapatkan anomali medan magnetik total. Reduksi ke kutub anomali medan magnetik total dilakukan untuk menyederhanakan pola kontur anomali di ekuator. Anomali medan magnetik total reduksi ke kutub telah difilter untuk mendapatkan anomali residual yang merefleksikan target benda anomali pada kedalaman yang dangkal. Hasil yang didapat menunjukkan kontur anomali medan magnetik total reduksi ke kutub terlihat lebih sederhana dan mudah untuk diinterpretasi. Aplikasi kedua metode tersebut pada daerah “C” di Jawa Barat telah berhasil diterapkan. Pada low pass filter anomali yang muncul menunjukkan pola smooth yang merupakan efek dari benda anomali regional. Pada anomali residual menunjukkan pola efek dari benda anomali yang dangkal. Nilai anomali medan magnetik total residual yang rendah pada lokasi penelitian diprediksi sebagai tempat terdepositnya emas yang berasosiasi dengan patahan dan zona alterasi yang berada di bagian selatan dan barat lokasi penelitian.Delineation of gold prospecting area based on the total magnetic field anomalies reduction to the pole have been done. The total magnetic field intensity data were corrected by diurnal and IGRF to obtain the total magnetic field anomalies. The total magnetic field values were reduced to the pole to simplify contour shceme in equator and filtered to obtain the residual anomalies which are reflected as shallow depth anomalies. The results showed that the reduction to the pole contour were more simple and easily to be interpreted. Application of both methods in area "C" at West Java Province has been successfully delineating gold deposit in the area. In low pass filter the anomalies showed smooth pattern which are representated as regional effects. The residual anomalies appear as near surface effects. The low magnetic values in the residual data be expected as gold deposit which associated with fault and alteration zones where located in south and west section of the research field. Keywords: magnetic method, the total magnetic field anomalies, reduce to the pole, low pass filter, gold potential

Studi Kestabilan Lereng Menggunakan Metode Rock Mass Rating (RMR) pada Lereng Bekas Penambangan di Kecamatan Lhoong, Aceh Besar Rijal Askari; Ibnu Rusydy; Febi Mutia
Journal of Geoscience, Mining Engineering, and Technology Vol 1, No 1 (2017): Jurnal Ilmiah Mahasiswa Teknik Kebumian
Publisher : Journal of Geoscience, Mining Engineering, and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1832.393 KB)

Lereng merupakan bagian yang membentuk sudut kemiringan tertentu terhadap bidang horizontal dari permukaan bumi. Kondisi lereng bekas penambangan yang terdapat di Desa Jantang, Kecamatan Lhoong, Aceh Besar ditemukan adanya bekas longsoran yang diakibatkan kurangnya monitoring yang dilakukan secara berkala. Tujuan penelitian ini untuk mengetahui nilai bobot dari klasifikasi massa batuan Rock Mass Rating (RMR) yang terdapat pada lokasi penelitian. Penelitian ini menggunakan metode Scanline dengan panjang 50 meter dan metode Rock Mass Rating (RMR). Pengumpulan data berupa data struktur kekar yang terdapat pada lokasi penelitian. Hasil Rock Mass Rating (RMR) yang ada pada lokasi penelitian diperoleh nilai bobot total sebesar 73,10. Simpulan dari penelitian ini bahwa nilai klasifikasi massa batuan Rock Mass Rating (RMR) yang terdapat pada lokasi penelitian dapat diklasifikasikan ke dalam kelas II (baik).

Studi Likuifaksi Menggunakan Nilai Poisson’s Ratio di Kecamatan Meurah Dua, Pidie Jaya Sinta Mandasari; Asrillah Asrillah; Ibnu Rusydy
Journal of Geoscience, Mining Engineering, and Technology Vol 1, No 1 (2017): Jurnal Ilmiah Mahasiswa Teknik Kebumian
Publisher : Journal of Geoscience, Mining Engineering, and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (959.348 KB)

Penentuan potensi likuifaksi berdasarkan Poisson’s ratio telah dilakukan di Kecamatan Meurah Dua Kabupaten Pidie Jaya. Pengukuran dilakukan pada lokasi yang mengalami kerusakan infrastruktur akibat gempa bumi pada tanggal 7 Desember 2016 di Kabupaten Pidie Jaya. Tujuan dari penelitian ini yaitu mengetahui potensi likuifaksi berdasarkan nilai Poisson’s ratio dan jenis lapisan tanahnya. Nilai Poisson’s ratio dapat dihitung berdasarkan nilai kecepatan gelombang kompresi (Vp) dan nilai kecepatan gelombang geser (Vs). Nilai Vp dan Vs didapatkan berdasarkan metode seismik refraksi dan MASW (Multhichannel Analysis of Surface Wave). Pengukuran dilakukan sebanyak tiga lintasan dengan menggunakan Seismograf PASI 16S-24P untuk setiap metode. Panjang lintasan untuk metode seismik refraksi 92 meter dan metode MASW 56 meter. Kemudian data Vp diproses dengan menggunakan Software ZondST2D dan data Vs diproses dengan menggunakan Software SeisImager. Nilai Poisson’s ratio yang didapatkan menunjukkan adanya lapisan pasir dan lempung jenuh. Lapisan pasir memiliki porositas yang lebih besar dari pada lapisan lempung jenuh. Porositas yang besar dapat menyebabkan potensi likuifaksi. Sehingga diindikasikan bahwa setiap lintasan pengukuran memiliki potensi likuifaksi. Potensi likuifaksi terbesar di desa Pante Beureune sementara potensi likuifaksi terkecil di desa Meunasah Raya.

Application of Magnetics Method to Mapping the Geothermal Source at Seulawah Agam Area Asrillah Asrillah; Marwan Marwan; Ibnu Rusydy; Gartika Setiya Nugraha
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.016 KB)

Magnetic method had been employed at Seulawah Agam area in term of unveiling the potentially geothermal source. This method was carried out locally in both the geothermal filed of Heutsz’s Crater and Cempaga’s Crater where the locations are in Seulawah Agam slope which is included in Aceh Besar District. Geologically, the area is mainly controlled by volcanic mudflow and Lam Teuba’s rocks consisting of breccia, pumice and tuff and their age are from Tersier to Resen Period. The deployed equipment consisted of Magnetometer GSM-19T, Proton Sensors, Aluminum Stick, Connection Cable, GPS Antenna, Compass, and Watch. Portable GPS (Global Positioning System), Navigation type (map of the survey area), and complemented by the other technical equipment, such as handy talky, umbrella, pens and notes of observed data. This study was done by following two steps. At first, the base station was established as a reference point for all magnetic data of measurements. Furthermore, recording magnetic data at each point by repeating three times until the last point by following the looping pattern as pathway of measurement both in Heutsz’s crater whose nine point recordings and in Cempaga’s crater whose seventeen points was consecutively done. The data were simply processed by using Microsoft excel that can just plot the magnetic anomaly and interpreted qualitatively being preliminary research. The result showed that at the north pathway had high magnetic anomaly of rocks located at B6 point and it was assumed as the area having the economically mineral in fracture zones. The rocks with low a anomaly value were obtained at –F125 BR is suggested as the thermal sources while at the South pathway from observing station till the Cempaga’s crater was obtained the geological structure as the Sumatran Fault of Aceh’s segment at CK4 point and this finding showed similar correlation with the result of gravity survey at same pathway published in another paper. In conclusion, this method effectively showed that the Seulawah Agam has potency as thermal source.

IDENTIFICATION OF SUBSURFACE STRUCTURE USING SEISMIC REFRACTION METHOD AT JANTHO ACEH BESAR Muhammad Zikrilah; Didik Sugiyanto; Ibnu Rusydy
Jurnal Natural Volume 16, Number 2, September 2016
Publisher : Universitas Syiah Kuala

An identification of subsurface structure in the surrounding area of Aceh Besar regent’s office was conducted by using seismic refraction method. The aims of this study are to determine the velocity value between layers in order to describe thesubsurface layer model, to identify the types of rocks on each layer, and to analyze the depth of bedrock layer located in the subsurface. There are 4 tracks with spaces in between each geophone, and on each track, with the width of 3 m. The total spread on the track is 72 m and the farthest shoot point is 36 m from the farthest geophone point.

KAJIAN STATISTIK SEISMISITAS KAWASAN SUMATERA Warni Asnita; Didik Sugiyanto; Ibnu Rusydy
Jurnal Natural Volume 16, Number 2, September 2016
Publisher : Universitas Syiah Kuala

The research was conducted in order to identify the distribution of seismicity, repeated periods of earthquakes and the probability of earthquake in Sumatra using Likelihood Maximum methods. Earthquake data from the ISC and USGS catalogue were used. Earthquake data from 1914-2014 (100 year span) with magnitude of (M)≥5 SR and depth (h)≤100 km that is located at 60LS – 100LU and 920BT – 1080BT. The latitude and longitude coordinates were divided into 21 regions. The results showed distribution of seismicity in Sumatran as much as 3634 events of earthquake during the 100 last years. The distribution of seismicity in Sumatra is quite high. From data shown, there was value a, which is between 4.81 - 9.94 and value b which is between 0.54 - 1.32. This condition indicated an index value of M≥5 SR, which is between 0.006 - 0.076 and repeated periods between 13 - 175 years with the probability of earthquake M≥5 SR between 5.6% - 99.9% for T (time) = 10, 50 and 100 years.

A PRELIMINARY STUDY ON AQUIFER IDENTIFICATION BASED ON GEO-ELECTRICAL DATA IN BANDA ACEH, INDONESIA Didik Sugiyanto; Ibnu Rusydy; Marwan Marwan; Dian Mutia Hidayati; Asrillah Asrillah
Jurnal Natural Volume 18, Number 3, October 2018
Publisher : Universitas Syiah Kuala

The aquifers exploration has been conducted at the western part of Banda Aceh, Indonesia. This research aims to explore the aquifer layer beneath the surface and to obtain the cross-section model of the aquifer. The Vertical Electrical Sounding (VES) method was applied to investigate the aquifer layer. The VES method worked as the current penetrated into the ground using of two electrodes and the potential response due to its current being measured by another two electrodes. Ten grid points of VES has performed in western part of Krueng Aceh of Banda Aceh using the ARES (Automatic Resistivity Meter). The Res1Dinv and curve matching computer software used in VES data processing and analysis. The result shows the resistivity value of aquifer in Banda Aceh city at the range of 1 – 12 Ωm for freshwater, and 0.1 – 0.6 for brackish water layer. The first aquifer (water table) found at a depth of 0.5 to 2 meters beneath the surface. The 2-meters water table mostly located near the coastal zone or downstream zone of Krueng Aceh basin and shallow depth of 0.5 meters on the upstream. More than one aquifer layers were found beneath the surface, they were separated by aquitard layer consisting of silt to clay layers.

Study of Seulawah Agam’s Geothermal Source Using Gravity Method Marwan Marwan; Ibnu Rusydy; Gartika Setiya Nugraha; Asrillah Asrillah
Jurnal Natural Volume 14, Number 2, September 2014
Publisher : Universitas Syiah Kuala

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

Gravity method was carried out at Seulawah Agam Area to delineate the existence of geothermal source, which is specifically existed in both the geothermal filed of Heutsz’s Crater and.Cempaga’s Crater. The Seulawah Agam is located in Aceh Besar district. Geologically, the area is dominated by volcanic mudflow and Lam Teuba’s rocks having age from Tersier to Resen Period. The equipment used includes Gravimeter CG-5 Autograv, Portable GPS (Global Positioning System), Navigation type (map of the survey area), computer and the other technical supports, such as handy talky, umbrella, watch, pens and observed data notes. This research was conducted by doing two stages. Firstly, establishing the base station which is a reference point for all gravity data measurements at each point. Secondly, measuring gravity data at each point by repeating three times following looping pattern as pathway of measurement either in Heutsz’s crater whose nine points recording or in Cempaga’s crater whose seventeen points. The data was simply processed using Microsoft Excel that can just plot the Bouguer anomaly and interpreted qualitatively due to preliminary research. The resultof this research has shown that both areas have two kinds of Bougeur anomalies which slightly attract attention who’s high and low anomaly. At Heutsz’s Crater has high and low density existed at F125 FR and B6 point. The Point whose high density means that it was formed mineralization by hydrothermal process through fracture materials, meanwhile the point whose low density indicates that there is existed the fault which is quite related to Seulimum’s Fault based on Aceh map. This result is also same as obtained at Cempaga’s Crater which means also same interpretation. In addition, it can be sum up that fault zones are essentially important in geothermal system that plays vital role in term of fluid circulation. Employing the gravity method in this research effectively can be said

Co-Authors . Zulfahriza Abrar Muslim Adrian*, Fahri Adrian, Fahri Agus Pajrin Jaman Agustina, Yolandari Akbar, Yaumil Akmal Muhni Al-Huda, Nafisah Alvin Caesar Lesmana Ikramsyah Arfan, Rahmanul Asrillah Asrillah Asrillah Asrillah Asrillah Asrillah Asrillah Asrillah Bambang Setiawan Banta Chairullah Desyandri Desyandri Devi Sundary Dian Mutia Hidayati Didik Sugiyanto Didik Sugiyanto Didik Sugiyanto Eldina Fatimah Fahira, Jihan Farzian Iqbal Fauzi Andika Febi Mutia Gartika Setiya Nugraha Halida Yunita Hulwani, Zati Huzaibi, Imam Imam Munandar Khaizal Jamaluddin Khaizal Jamaluddin Lono Satrio M Fahmi MARIA BINTANG Marwan Abu Bakar Marwan Marwan Mirna Rahmah Lubis Muchlis Muchlis Muhammad Syukri Muhammad Zikrilah Mutia*, Intan Nafisah Al Huda Naufal Effendi Nazli Ismail Nugraha*, Gartika Setiya Nurul Aflah Pocut Nurul Alam Rafsan, Teuku Muhammad Noefran El Raudhatul Jannah Rifqan*, Rifqan Rijal Askari Rizki Maulana, Rizki Rozalli, Muhammad Sari*, Novita Sartika*, Dewi Setiawan*, Bambang Sinta Mandasari Surbakti, Muhammad Syukri Syafrizal Idris Syafrizal Syafrizal Syafrizal Syafrizal Warni Asnita Yoshinori Furumoto

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