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All Journal Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Jurnal Talenta Sipil Jurnal Rivet: Riset dan Invensi Teknologi Innovative: Journal Of Social Science Research Global Education Journal
Rahmawati, Devit
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Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Social Sciences Other

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KAJIAN TEKNIS POLA PENIMBUNAN BATUBARA DI STOCKPILE SEBAGAI UPAYA PENCEGAHAN SELF HEATING DAN PERHITUNGAN RENCANA DIMENSI SALURAN AIR DI PT. BARATAMA REZEKI ANUGERAH SENTOSA UTAMA KABUPATEN BUNGO Hasan, Pahrul; Rianto, Doli Jumat; Rahmawati, Devit
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 3, No 1 (2021)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/p.semitan.2021.2018

Abstract

PT. Baratama Rezeki Anugerah Sentosa Utama (PT. BRASU) merupakan salah satu perusahaan yang bergerak pada Industri Pertambangan Batubara, yang secara administratif terletak di Kabupaten Bungo, Provinsi Jambi. Metode penambangan yang diterapkan oleh perusahaan adalah metode tambang terbuka. Metode penelitian ini menggunakan metode kuantitatif. Tujuan yang akan dicapai pada penelitian ini adalah menghitung volume batubara di stockpile,menghitung perkiraan kapan terjadinya swabakar terhadap pola penimbunan di stockpile, membuat rencana dimensi saluran air di stockpile. Berdasarkan hasil penelitian stockpile batubara di PT. BRASU. Timbunan pada penelitian d stockpile terdiri dari 3 (tiga) yaitu Timbunan I, Timbunan II, dan Timbunan III. Pada timbunan I diperoleh volume batubara sebesar 4090,08 ton dengan tinggi timbunan 8 m dan sudut timbunan sebesar 34o. Timbunan II diperoleh volume batubara sebesar 5142,74 ton dengan tinggi timbunan 9 m dan sudut timbunan sebesar 39o. Timbunan III diperoleh volume batubara sebesar 3929,45 ton dengan tinggi timbunan 8,5 m dan sudut timbunan sebesar 43o.Perkiraan terjadinya swabakar pada masing-masing timbunan diperoleh pada Timbunan I dengan suhu permukaan rata-rata diperoleh sebesar 47,4oC dan suhu kedalaman timbunan batubara (1 meter) diperoleh suhu rata-rata sebesar 49,2oC, sehingga diperoleh perkiraan terjadinya swabakar tersebut terjadi pada 7 minggu setelah batubara ditimbun pada stockpile. Pada timbunan II suhu permukaan rata-rata diperoleh sebesar 48,5oC dan suhu kedalaman timbunan batubara (1 meter) diperoleh suhu rata-rata sebesar 50,7oC, sehingga diperoleh perkiraan terjadinya swabakar tersebut terjadi pada 5 minggu setelah batubara ditimbun pada stockpile. Pada timbunan III suhu permukaan rata-rata diperoleh sebesar 49,2oC dan suhu kedalaman timbunan batubara (1 meter) diperoleh suhu rata-rata sebesar 51,1oC, sehingga diperoleh perkiraan terjadinya swabakar tersebut terjadi pada 6 minggu setelah timbunan batubara ditimbun pada stockpile.Rekomendasi dimensi saluran dari penelitian tugas akhir ini adalah kedalaman saluran ( h ) sebesar 0,60 m,  lebar dasar saluran ( b ) sebesar 0,76 m, lebar permukaan saluran (B) 1,45 m sebesar 145 cm, panjang sisi saluran ( a ) sebesar 0,69 m, luas penampang saluran (A) Sebesar 0,62 m2, tinggi jagaan sebesar 0,09 m
Simulasi Jaringan Drainase Kawasan Desa Lubuk Suli Kec. Depati VII Kabupaten Kerinci Menggunakan Program EPA SWMM Versi 5.1 Putri, Ade Kurnia; Rahmawati, Devit; Nasution, Ari Endra
Jurnal Talenta Sipil Vol 7, No 2 (2024): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v7i2.661

Abstract

One of the areas in Kerinci Regency that is often hit by floods is Lubuk Suli Village.  Flooding was caused by overflowing water from the Batang Marao river. The main objective of this research is to provide information to the relevant government about good drainage for the Lubuk Suli Village Area using existing data and planning data by simulating the capability of the Drainage Network for the Lubuk Suli Village Area using the EPA SWMM 5.1 program. The data used in this research are land use maps to determine the percentage of impervious area, rainfall data and drainage channel dimension data in the area. The rain data series used is hourly rain data. Due to the absence of hourly rainfall data at the rain station at the research location, hourly rainfall distribution was determined by changing the Intensity-Duration-Frequency (IDF) curve for a 5 year return period into a planned rainfall hyetograph using the Alternating Block Method (ABM). After all parameters have been input into EPA SWMM 5.1. Simulation can be done. The simulation quality is quite good if the continuity error for surface runoff and flow tracing is > 10%. The simulation carried out in this research is divided into 2 scenarios, namely with existing data and additional storage. From the simulation results, it was found that in the 2 scenarios, the number of flood points in the simulation for scenario 1 was 6 points and in scenario 2 there were 5 points. This shows that the drainage planning design for the Lubuk Suli Village area has not been able to overcome the existing drainage load in the area.
Tinjauan Ulang Dimensi Saluran Drainase Menggunakan Software Storm Water Management Model (Studi kasus : Desa Lubuk Suli Kecamatan Depati VII Kabupaten Kerinci) Honesti, Anisa; Putri, Ade Kurnia; Rahmawati, Devit
JURNAL RIVET Vol 4 No 02 (2024): Desember 2024
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/rivet.v4i02.1791

Abstract

This journal contains a review of drainage channels using SWMM software modeling
Analisis Perubahan Luas Void Bekas Tambang Batubara Menggunakan Metode NDWI Di PT. Tebo Prima Kabupaten Tebo Oktavia, Marisa; Rahmawati, Devit; desmawita, Desmawita; Marliantoni, Marliantoni; Muslim, Muslim
Innovative: Journal Of Social Science Research Vol. 5 No. 1 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i1.17689

Abstract

P.T Tebo Prima is a company engaged in coal mining which is located in the village of Sungai Bengkal Village. The mining method used is open pit mining using this method will cause an impact in the form of former mining holes which are commonly called voids. The aims of this research are to; Analyzing Existing Void Water Bodies Using the NDWI Method, and Analyzing Changes in Boundary Areas of Water Bodies. This study uses remote sensing-based data in the form of aerial photo data and Landsat 8 OLI/TIRS imagery. The method used in this study is the NDWI (Normalized Difference Water Index) method to compare the level of wetness in satellite images. This research uses Google Earth Pro, Global Mapper, and Surfer software. Based on the results of image data processing on the Global Mapper software, the area of ex-coal mining voids in May 2019 was 1.77 Ha, June was 1.33 Ha, July was 2.25 Ha, October was 2 ,77 Ha. Factors that  affect  changes  in the area of  water bodies  in the  voids are; Changes  in soil sedimentation in water bodies due to erosion by water There is water intrusion that enters through small rivers around the void, high rainfall in how many months so that it increases the water discharge in the void.   Keywords: Void; Change in Existing Void Area; NDWI
Penjadwalan Produksi Batubara Berdasarkan Net Present Value (NPV) Optimal Desmawita, Desmawita; Aprianto, Asrul; Rahmawati, Devit; Marliantoni, Marliantoni; Oktavia, Marisa
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.19697

Abstract

PT Tebo Prima akan melakukan penambangannya di sebelah barat, tepatnya di blok D1 site rantau api dengan target produksi 240.000 ton/bulan. Adanya ketidak tercapaian produksi pada bulan sebelumya sehingga perlunya suatu perhitungan yang logis dalam upaya memenuhi pencapaian target produki dengan tujuan mendapatkan keuntungan optimal. Skenario penambangan dirancang sebanyak 3 (tiga) yaitu skenario A, B, dan C dengan masing-masing skenario memiliki 3 (tiga) Sequence, rancangan Sequence berdasarkan target produksi pertahun sebesar 2.880.000 ton. Perhitungan cash flow dihitung pada masing-masing skenario, dimana masing-masing cash flow skenario penambangan A, B dan C sebesar $ 39.319.458,07. Sehingga diperoleh perhitungan NPV skenario penambangan A sebesar $ 24. 291.678,44, NPV skenario penambangan B sebesar $24.553.849,99 dan NPV skenario penambangan C sebesar $ 24.684.109,49. Berdasarkan hasil perhitungan yang dilakukan, nilai NPV optimal berada pada skenario penambangan C dengan nilai NPV sebesar $24.684.109,49 nilai NPV skenario penambangan C positif (+) hal ini menunjukan proyek layak secara ekonomis.
Comparative Analysis of Time and Cost Efficiency in Project Acceleration Strategies: A Case Study of the Construction of a Police Service Building Afrida, Widia Dini; Renjani, Muhammad Sodri; Rahmawati, Devit; Radinal, Radinal
Global Education Journal Vol. 3 No. 1 (2025): Global Education Journal (GEJ)
Publisher : Civiliza Publishing, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59525/gej.v3i1.288

Abstract

Optimal time and cost management are fundamental factors in ensuring the success of construction projects. One effective approach to address the risk of delays and cost overruns is the Time Cost Trade-Off (TCTO) method, which allows for project duration compression through resource adjustment and cost control. This study aims to analyze and compare two acceleration scenarios for the construction of the Police Service Building in Bungo Regency: additional working hours (overtime) and additional labor. This study uses a descriptive quantitative approach through a case study. The Critical Path Method (CPM) is applied to identify the critical path as the basis for implementing the TCTO strategy. The results of this study indicate that both scenarios can accelerate the project duration from 214 days to 130 days, with a time efficiency of 39.25%. The overtime scenario provides a cost efficiency of 0.38%, while additional labor results in an efficiency of 0.16%. Although overtime is more economical in nominal terms, the additional labor strategy is considered more stable and feasible to implement in public projects with sufficient work space. The results of this study contribute to strategic decision-making in data-driven construction project management.
Co-Authors Afrida, Widia Dini Aprianto, Asrul Desmawita, Desmawita Hasan, Pahrul Honesti, Anisa Marliantoni, Marliantoni Muslim Muslim Nasution, Ari Endra Oktavia, Marisa Putri, Ade Kurnia Radinal, Radinal Renjani, Muhammad Sodri Rianto, Doli Jumat