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All Journal Journal of Degraded and Mining Lands Management Forum Geografi Journal of Geoscience, Engineering, Environment, and Technology PROMINE Jurnal Chemurgy Specta Journal of Technology JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Jurnal Locus Penelitian dan Pengabdian Journal Transformation of Mandalika Jurnal Riset Teknik Pertambangan Journal of Comprehensive Science (JCS) MINERAL Nusantara Civil Engineering Journal Jurnal Sosial dan Sains Jurnal Manusia dan Lingkungan Jurnal Inovasi Global Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan JURNAL TEKNOLOGI MINERAL FT UNMUL ANDIL Mulawarman Journal of Community Engagement
Devy, Shalaho Dina
Fakultas Teknik, Universitas Mulawarman
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Hydrogeology of Karang Mumus Watershed in Samarinda, East Kalimantan Province, Indonesia Devy, Shalaho Dina
Forum Geografi Vol 32, No 1 (2018): July 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v32i1.5229

Abstract

Samarinda is part of an anticlinorium, which is marked by the existence of many anticlines. In addition, various types of rock and aquifer can be found in the city due to the uniqueness of geological structure of the area. Nevertheless, the literature are lacking attention of hydrogeological condition of this area. This research aims to determine the hydrogeology of the Karang Mumus watershed, particularly in relation to its geology and land use conditions. The research uses an inductive method, with an analytical approach consisting of a study of the land use, hydrological conditions, geology, geomorphology and hydrogeology. The Karang Mumus watershed can be divided into three hydrogeological layers: (1) an aquitard layer, the top layer, which has a hydraulic conductivity of 4.3 × 10-6 m/sec, and is dominated by siltstone; (2) an aquifer layer in the middle, with a hydraulic conductivity of 2.6 × 10-4 m/sec, dominated by sand and sandstone; and (3) an aquiclude layer occupying the lower layer, with a hydraulic conductivity of 1.6 × 10-11 m/sec, and which is dominated by claystone.
Pemodelan airtanah dan Neraca Airtanah Dampak Penambangan Batubara Open Pit pada Lipatan Sinklin di Daerah Muara Lawa, Kabupaten Kutai Barat, Provinsi Kalimantan Timur Devy, Shalaho Dina
SPECTA Journal of Technology Vol 2 No 2 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v2i2.108

Abstract

  Ch a n g e s in land use impacts on groundwater availability both in quality and quantity. Study of geological, hydrogeological conditions, hydrological, hydrogeological boundary conditions contribute to determine the presence of groundwater in the groundwater basin and determine the natural groundwater flow modeling patterns. Location of the study are in Muara Lawa, including the formation Pulaubalang, Pamaluan, and Balikpapan on Lampanan syncline structure. Exploration drilling results indicate, that the hydrogeological study area into the aquifer system of folded sedimentary rocks consisting of seven aquifer layers alternating between akuitar, aquifers, and the base layer in the form of akuiklud. The area bounded by the limits of the model study of surface water in two major rivers, the Lawa River (east) and the Perak River (west), as well as the groundwater divide with the highest head (north and south. The results of the analysis of the type of regional aquifers aquifer models including the category of semi depressed with aquitards dominance in the surface layer. The pattern of groundwater flow and head height can be predicted by modeling using Visual Modflow. There is an increase zone budget is almost five times higher than the natural condition to the active mining conditions, particularly in the green zone, that of the natural conditions of 1,502 m3 day-1 to 12,930 m3 day-1 in the active mining. This is due, in the mining area there is a change in land use and hidrostratigrafi, namely the formation of pits that reach depths of 70 meters.
Groundwater Effect on Slope Stability in Open Pit Mining: a Case of West Kutai Regency, East Kalimantan, Indonesia Shalaho Dina Devy; Pretty Permatasari Hutahayan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 6 No. 4 (2021): JGEET Vol 06 No 04 : December (2021)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2021.6.4.6226

Abstract

The stability of open pit slopes in Biangan district, West Kutai Regency, East Kalimantan Province, is greatly influenced by groundwater conditions. The existence of groundwater reduces the shear strength of the materials which causes a decrease in the stability value of pit slopes. The main objective of this study is to assess the impact of groundwater on the stability of the low wall and high wall pit mining. Groundwater modeling is used to determine the prediction of groundwater level on the pit slope which determines the value of the slope stability. Slope stability analysis in this study was performed using the Finite Element Method, producing output in the form of strain zones, deformation and displacement values. Therefore, the Strength Reduction Factor (SRF) approach was used, which is a gradual reduction of shear strength until the values of cohesion and friction angles reach minimums and the slopes are at a critical state. Groundwater modeling results indicate that groundwater flows to the Biangan river with hydraulic heads between 76 and 108 meters above sea level. Based on the analysis using the Finite Element Method, the stability values of the pit slopes, which are influenced by groundwater, are 0.65 on the low wall and 1.40 on the high wall. The total displacements are 0.019 meters on the low wall and 0.002 meters on the high wall. The impact of groundwater on the slope is an increase in the slope load. This increases the materials’ thrust and reduces the shear strength of the materials which reduces the rock mass that can function as a water seepage path. Thus, the recommendation for low wall pit construction is a safety factor of 7.79 with a total displacement of 0.020 meters.
Groundwater aquifer study on coal mining area: a case of North Samarinda, Indonesia Shalaho Dina Devy; Christian Sarungallo
Journal of Degraded and Mining Lands Management Vol 6, No 1 (2018)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1329.496 KB) | DOI: 10.15243/jdmlm.2018.061.1483

Abstract

One of the sectors supporting the economy of Indonesia is the mining industry. In East Kalimantan, coal mining activity has been done widely. Coal-mining open-pit activities play a significant role in the economic growth and the advancement of technology for Indonesia. Therefore, it is necessary to study every critical aspect including the hydrological and hydrogeological studies but especially aquifers, so that mining activities can be well managed and the impact on the environment can be overcome. The study of the aquifer from the study area was based on the resistivity value of the materials obtained through one of the geophysical methods that are the geoelectrical resistivity method, by using Wenner-Schlumberger configuration. In this study, geoelectrical resistivity method was performed in order to find out the condition of the subsurface by injecting two electrodes into the soil using direct current (DC) with certain distance so that potential difference can be known and resistivity information of subsurface layers can be obtained. The obtained resistivity value of the material was then interpreted so that the type of aquifer in the study area can be known. The interpretive results of the resistivity values of the materials in the study area showed that the distribution of aquifers based on measurement of a geoelectrical line of line number one, two and three, ware semi-confined aquifers. Meanwhile, the distribution of aquifers of line number four was confined aquifers. Based on the results of hydrological studies, the area of study has an annual rainfall of 3,053.704 mm/year with a watershed area of 16.586 km2. The evapotranspiration value of the study area is 1,784.21 mm/year, the surface run-off is 913.51 mm/year, and groundwater recharge is 355.98 mm/year.
Hydrogeology of Karang Mumus Watershed in Samarinda, East Kalimantan Province, Indonesia Shalaho Dina Devy
Forum Geografi Vol 32, No 1 (2018): July 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v32i1.5229

Abstract

Samarinda is part of an anticlinorium, which is marked by the existence of many anticlines. In addition, various types of rock and aquifer can be found in the city due to the uniqueness of geological structure of the area. Nevertheless, the literature are lacking attention of hydrogeological condition of this area. This research aims to determine the hydrogeology of the Karang Mumus watershed, particularly in relation to its geology and land use conditions. The research uses an inductive method, with an analytical approach consisting of a study of the land use, hydrological conditions, geology, geomorphology and hydrogeology. The Karang Mumus watershed can be divided into three hydrogeological layers: (1) an aquitard layer, the top layer, which has a hydraulic conductivity of 4.3 × 10-6 m/sec, and is dominated by siltstone; (2) an aquifer layer in the middle, with a hydraulic conductivity of 2.6 × 10-4 m/sec, dominated by sand and sandstone; and (3) an aquiclude layer occupying the lower layer, with a hydraulic conductivity of 1.6 × 10-11 m/sec, and which is dominated by claystone.
Investigasi kondisi airtanah dengan geolistrik: studi kasus endapan aluvial di Bengalon Kutai Timur, Provinsi Kalimantan Timur Indonesia Shalaho Dina Devy; Ibnu Hasyim
PROMINE Vol 9 No 1 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i1.2306

Abstract

Bengalon is located in East Kutai Regency, East Kalimantan Province. Bengalon is included in the Samarinda-Bontang groundwater basin. The development of agricultural and industrial areas, followed by an increase in residential areas, will cause an increase in the water demand. This study aims to determine the groundwater potential of alluvial areas using the resistivity geoelectric method. The resistivity survey resulted in subsurface lithology, shallow groundwater conditions in the form of depth, thickness, and location of the aquifer as well as the type of groundwater quality. There are 10 locations for geoelectric data collection using the 2D geoelectric method. The results showed that the majority of the aquifers were alluvial deposits consisting of sand and sandy clay. The resistance indicating groundwater is 1 - 4 Ω m, at a depth of 10 – 50 m with a thickness varying from 10 – 20 m which has been dominated by sand. The presence of sea water intrusion in aquifers causes the quality of groundwater to tend to be brackish because the research location is in a swamp area bordering the coast.
Analisis Kekuatan Massa Batugamping Menggunakan Kriteria Keruntuhan Hoek-Brown di Kota Samarinda, Provinsi Kalimantan Timur Mohammad Geraldo fahmi; Tommy Trides; Shalaho Dina Devy; Revia Oktaviani; Harjuni Hasan
Nusantara Civil Engineering Journal Vol 1 No 2 (2022): Nusantara Civil Engineering Journal
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (661.95 KB) | DOI: 10.32487/nuce.v1i2.398

Abstract

Daerah penelitian merupakan kawasan tambang batugamping yang terletak di daerah Air putih, Samarinda Ulu, Kalimantan Timur. Faktor keamanan pada aktifitas penambangan sangat ditentukan dengan kualitas massa batuan. Penelitian ini bertujuan untuk menganalisi massa batuan dengan menggunakan kriteria keruntuhan Hoek-Brown. Penelitian ini menggunakan metode kuantitatif. Untuk mendapatkan hasil analisis kekuatan massa batuan batugamping diperlukan beberapa parameter utama yaitu kuat tekan uniaksial batuan utuh, indeks kekuatan geologi (GSI), litologi, faktor gangguan, bobot isi batuan. Berdasarkan hasil penelitian diketahui bahwa kekuatan nilai massa batuan didapatkan dari hasil uji kuat tekan uniaxial dengan pembebanannya mengikuti standar ISRM 1981 sehingga dari hasil pengujian tersebut menghasilkan nilai 23 Mpa. Untuk hasil pengolahan data dengan kriteria keruntuhan Hoek-Brown didapatkan nilai GSI 78 dengan tingkat kualitas kondisi permukaan batuan sangat bagus. Untuk kualitas massa batuan ini memiliki struktur spesimen batuan utuh dengan sedikit ruang diskontinuitas. Berdasarkan pengamatan keadaan pada aktifitas penambangan pada daerah penelitian menggunakan metode penggalian secara mekanis maka ditentukan nilai faktor gangguan 0,7 dengan bobot isi batuan 0,59 gr/cm3. Berdasarkan kriteria keruntuhan Hoek-Brown. hasil akhir penelitian akan digunakan sebagai rekomendasi untuk desain penambangan batugamping dengan aman.
STUDI PENCAMPURAN BATUBARA KUALIATAS RENDAH DENGAN ARANG GERGAJI KAYU SENGON PADA PROSES PEMBUATAN BRIKET Donal Donal; Harjuni Hasan; Agus Winarno; Windhu Nugroho; Shalaho Dina Devy
JOURNAL TRANSFORMATION OF MANDALIKA (JTM) e-ISSN 2745-5882 p-ISSN 2962-2956 Vol. 3 No. 1 (2022): JOURNAL TRANSFORMATION OF MANDALIKA
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

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

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui hasil analisis proksimate, uji kuat tekan dan penyalaan api serta laju pembakaran pada briket. Hasil penelitian menunjukkan bahwa jenis perekat dan biomassa berpengaruh nyata terhadap kadar air, kadar abu, zat mudah menguap, karbo tertambat, penyalaan api serta laju pembakaran, sedangkan tidak berpengaruh terhadap kerapatan dan kuat tekan. Perlakuan terbaik yang sesuai dengan standar SNI dari penelitian ini didapatkan dari perlakuan dengan komposisi 60% batubara : 40% arang sengon dan 50% batubara : 50% arang sengon dengan kode sampel KH dan KP perekat tepung tapioka. Briket dengan komposisi 60%batubara : 40% arang sengon kode sampel KH (Pulaubalang) yang dihasilkan dari perlakuan ini memiliki nilai kadar air 5,99 % ; kadar abu 6,92 % ; zat terbang 11,42%; kadar karbon tertambat 75,65%; laju pembakaran 3,74 g/menit ; nyala api 6 : 36 menit ; kerapatan 0,23 g/cm3 ; kuat tekan 38,22 kg/cm2. Briket dengan komposisi 50%batubara : 50% arang sengon kode sampel KP (Balikpapan) yang dihasilkan dari perlakuan ini memiliki nilai kadar air 6,96 % ; kadar abu 4,73 % ; zat terbang 11,92%; kadar karbon tertambat 76,39%; laju pembakaran 2,61 g/menit ; nyala api 6 : 57 menit ; kerapatan 0,21 g/cm3 ; kuat tekan 24.70 kg/cm2.
ANALISIS UJI KUAT TEKAN UNIAKSIAL TERHADAP BATUPASIR BERLAMINASI PADA FORMASI BALIKPAPAN DAN FORMASI PULAUBALANG, KOTA SAMARINDA, PROVINSI KALIMANTAN TIMUR (Uniaxial Compressive Strength Test Analysis of Laminated Sandstone in the Balikpapan Formation and Sharon Tria Kurniawati Silaban; Revia Oktaviani; Agus Winarno; Tommy Trides; Shalaho Dina Devy
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)

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

Abstract

Sandstone is one of the rocks that are often found in sedimentary basins in the world. Sedimentary rock is a type of rock formed as a result of the deposition process. The deposition is caused by various transport forces such as water, wind and ice. The difference in energy and depositional environment causes the layering structure of sedimentary rocks to vary, one of which is lamination. Lamination is a sedimentary layer structure that shows parallel (horizontal) layers, which are formed due to variations in the rate of deposition of different materials. Therefore, this study was conducted to determine the strength of a rock if it has a laminated structure with varying angles. Uniaxial Compressive Strength Test is how the rock can maintain its elasticity before collapsing. The research was conducted in 2 different formations, namely the Balikpapan Formation and the Pulaubalang Formation. The test results show that the Balikpapan Formation has an average compressive strength value for each corner. At an angle of 00 = 2.31 Mpa, an angle of 300 = 1.82 Mpa, an angle of 450 = 2.13 Mpa, an angle of 600 = 2.47 Mpa and at an angle of 900 = 3.57 Mpa. In the Pulaubalang Formation, the average compressive strength value is obtained at an angle of 00 = 3.69 Mpa, an angle of 300 = 2.35 Mpa, an angle of 450 = 2.39 Mpa, an angle of 600 = 3 Mpa and at an angle of 900 = 3.95 Mpa. . So, from the results of research and data processing that has been carried out the minimum compressive strength value is at a lamination angle of 300 and has a maximum value of compressive strength at an angle of 900. And from the two research formations, the Pulaubalang Formation has a higher rock strength than the Balikpapan Formation.
Analisis Pengaruh Number of Cycles Terhadap Pengujian Durabilitas Batulanau di Sidomulyo Samarinda Eva Indriani Sanggalangi; Shalaho Dina Devy; Windhu Nugroho
Jurnal Riset Teknik Pertambangan Volume 2, No. 2, Desember 2022, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v2i2.1618

Abstract

Abstract. Durability is defined as a measure of the rock's resistance to weathering and disintegration, when the rock undergoes weathering in a short period of time. This time the slake durability test was carried out with the testing standard of SNI 3406 Year 2011. This test used siltstone in the Balang Island Formation, Samarinda area. The particle size of the silt is midway between that of clay and fine sand. From the results of testing 8 samples of siltstone with 10 cycles that have been carried out, it can be seen that the siltstone in the Balang Island Formation tends to be stronger and the durability index value decreases relatively small from one cycle to the next. The value of Slake durability index (Id2) from each sample sequentially, namely 91.3%, 96.4%, 95.3%, 93.7%, 93.7%, 95.4%. 97.2%, 96.7%. The durability index test obtained an average durability index value (Id2) of 95%, where the value of siltstone at the research site is included in the very high classification. Abstrak. Ketahanan (durability) didefinisikan sebagai ukuran resistensi batuan terhadap pelapukan dan disintegrasi, ketika batuan mengalami proses pelapukan dalam jangka waktu yang singkat. Pengujian slake durability kali ini dilakukan dengan standar pengujian SNI 3406 Tahun 2011. Pengujian ini menggunakan batulanau pada Formasi Pulau Balang daerah Samarinda. Ukuran partikel lanau berada di tengah-tengah antara lempung dan pasir halus. Dari hasil pengujian 8 sampel Batulanau dengan siklus sebanyak 10 kali yang telah dilakukan terlihat bahwa Batulanau pada Formasi Pulau Balang cenderung lebih kuat dan nilai indeks durability mengalami penurunan yang relatif kecil dari siklus satu ke siklus berikutnya. Nilai Slake durability index (Id2) dari masing-masing sampel secara berurutan, yaitu 91.3%, 96.4%, 95.3%, 93.7%, 93.7%, 95.4%. 97.2%, 96.7%. Pengujian durability index tersebut diperoleh rata-rata nilai indeks durability (Id2) sebesar 95% , dimana dengan nilai tersebut batulanau pada lokasi penelitian termasuk dalam klasifikasi sangat tinggi.
Co-Authors Agita Kendari Putri Agus Winarno Ahmad Saeppudin Ainayah Al Fatihah Albertus Juvensius Pontus Albertus Juvensius Pontus Albertus Juvensius Pontus Aline Thresa Christian Sarungallo Christian Sarungallo Dean Ryanda Putra Donal Donal Dony Prakasa Eka Putra Emdananta Ginting Eva Indriani Sanggalangi Fitri Nur Fadilah Gampang Toha Gayus Irwanto Andeina Grecensius Jevino Hamzah Umar Hamzah Umar Harjuni Hasan Harjuni Hasan Harjuni Hasan Harjuni Hasan Henny Magdalena Heny Magdalena Heru Hendrayana Ibnu Hasyim Ibnu Hasyim Ibnu Hasyim Ihsan Upiani Irfan Irfan Irvan Oktaviandi Lucia Litha Respati Lucia Litha Respati Mardan Ali Mohammad Geraldo fahmi Musodiq Musodiq Pretty Permatasari Hutahayan Revia Oktaviani Revia Oktaviani Revia Oktaviani Rinto Syahreza Pahlevi Rizky Zwageri Royan Nurhidayat Sakdillah Sakdillah Sandri Tandi Rapang Sharon Tria Kurniawati Silaban Suhaila Ridwan Tommy Trides Tommy Trides Tommy Trides Tommy Trides Virgita Miranda Virgita Miranda W. S. Gumilang W. S. Gumilang William William Windhu Nugroho Windhu Nugroho Windhu Nugroho windhu Yafet Jaba Yogi Budi Utama