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All Journal Jurnal Sains dan Pendidikan Fisika Media Komunikasi Geografi Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences Jurnal Teknologi Pertambangan Techno LPPM JOURNAL ONLINE OF PHYSICS Jurnal Teknologi Mineral dan Batubara Jurnal Geomine RACIC : Rab Construction Research Indonesian Mining Journal Justek : Jurnal Sains Dan Teknologi Jurnal Mineral, Energi dan Lingkungan Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal GEOSAPTA Jurnal Basicedu Jurnal Tekno Insentif Media Ilmiah Teknik Lingkungan Jurnal Teknik ComTech: Computer, Mathematics and Engineering Applications KURVATEK INDONESIAN MINING PROFESSIONALS JOURNAL Jurnal Himasapta Jurnal Mineral, Energi dan Lingkungan Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT) Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Jurnal Sosial dan Teknologi Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer (JURITEK) Jurnal Inovasi Pertambangan dan Lingkungan Jurnal Basicedu INTAN Jurnal Penelitian Tambang Indonesian Mining and Energy Journal Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal Indonesia Sosial Teknologi Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Prosiding Seminar Nasional Teknik Lingkungan Kebumian SATUBUMI Jurnal Anestesi: Jurnal Ilmu Kesehatan dan Kedokteran Jurnal Teknologi Mineral dan Batubara Indonesian Mining Journal
Cahyadi, Tedy Agung
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Kesiapsiagaan Bencana Gempa Bumi di Sekolah: Model, Praktik, dan Tantangan dalam Membangun Sistem Pendidikan yang Tangguh Siregar, Imerilda Parlina; Prasetya, Johan Danu; Cahyadi, Tedy Agung; maharani, Yohana Noradika
Jurnal Basicedu Vol. 9 No. 5 (2025): In Progress
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/basicedu.v9i5.10394

Abstract

Kesiapsiagaan gempa bumi di sekolah merupakan aspek krusial dalam upaya pengurangan risiko bencana, khususnya di negara rawan gempa seperti Indonesia. Tujuan penelitian ini adalah untuk mengkaji pendekatan pendidikan kesiapsiagaan di sekolah dan merumuskan kerangka konseptual berbasis praktik terbaik. Kurangnya sintesis literatur yang menyeluruh mengenai model kesiapsiagaan adaptif dan partisipatif menunjukkan adanya kebutuhan untuk merumuskan pendekatan yang lebih komprehensif dan kontekstual. Metode yang digunakan adalah Systematic Literature Review terhadap 35 dokumen ilmiah terakreditasi, dengan analisis isi secara naratif dan tematik. Temuan dari penelitian ini adalah bahwa simulasi, pembelajaran berbasis pengalaman, dan media digital seperti DigiQuake secara signifikan meningkatkan kesiapsiagaan siswa. Namun, pelatihan guru belum merata, keterlibatan komunitas terbatas, dan integrasi kurikulum kebencanaan belum optimal. Kebijakan SPAB juga dinilai belum berkelanjutan akibat lemahnya mekanisme evaluasi. Kontribusi utama kajian ini adalah penyusunan kerangka kesiapsiagaan sekolah yang mengintegrasikan prinsip LIPI–UNESCO/ISDR dan Four Pillars of Preparedness, sebagai model yang adaptif dan kontekstual. Temuan ini dapat menjadi
Drain Hole Installation Design in an Open Coal Mine Cahyadi, Tedy Agung; Fadlil, Doni Firdaus; Titisariwati, Indun; Hartono, Hartono; Nursanto, Edy; Ansori, Muhammad Iqbal; Anggoro, Hengky
Journal TECHNO Vol. 7 No. 2 (2021): November
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/journal techno.v7i2.5441

Abstract

The presence of groundwater on the mine slopes can disturb the stability of the slope. High groundwater can increase pore pressure which affects the amount of load on the mine slope. In order to lower the groundwater level, it is necessary to have drainage holes to drain water naturally. This study aims to design a horizontal drain installation so that it can lower the groundwater table. The results of this study indicate the existence of an aquifer in the form of sandstones. In this aquifer horizontal drains will be installed. The results of this study are in the form of horizontal drains installation design, namely, the location of the installation of the horizontal drain, the diameter of the boreholes, the distance between the boreholes, the length of the horizontal drains installation pipe, and the angle of inclination of the installation of the horizontal drains.
MULTI CRITERION PRIORITY ON KRIGING OF GOLD RESOURCES PREDICTION Amri, Nur Ali; Bargawa, Waterman Sulistyana; Cahyadi, Tedy Agung
Journal TECHNO Vol. 7 No. 2 (2021): November
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/journal techno.v7i2.6343

Abstract

This paper describes of three things. First, the Kriging estimation on gold grade which is distributed in the vein. The empirical variogram method based on Matheron classical and robust of Cressie-Hawkins. The two empirical fitting on variogram theory of spherical and exponential equations of weighted least squares and ordinary least squares used. The predictions of six sizes block-Kriging respectively, 15×15, 25×25, 35×35, 50×50, 75×75 and 100×100 based on four variographic models. Second, determine the priority of 24 prediction combinations based on TOPSIS method. Finally, the multiple criterion decision making method namely, 15×15 block Kriging based on a robust empirical variogram of exponential weighted least squares model represents as the best result.
Turning DIN 19682-7 Procedure of Infiltration Rate of Soils Test into the Mobile App for Cloud Storage Sulistyo, Totok; Kiptiah, Mariatul; Kusumayudha, Sari Bahagiarti; Cahyadi, Tedy Agung; Fajar, Reza Adhi
ComTech: Computer, Mathematics and Engineering Applications Vol. 16 No. 2 (2025): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v16i2.13000

Abstract

The in-situ soil infiltration test using A Double Ring Infiltrometer (DRI) apparatus can be conducted in the field according to DIN 19682-7 standards and procedures. As required by these standards, the traditional paper-based measurement form can be replaced with a new application developed to meet standard requirements. The DRI apparatus consists of two concentric rings placed in the soil, filled with water, while the outer ring maintains a constant water level. The water level drop in the inner ring is observed and recorded at regular intervals. The infiltration rate can be calculated for each interval by measuring the change in water height over time. This new application facilitates the automatic calculation of both the actual soil infiltration rate and the Horton soil infiltration model. Comparison tests between the application results and Excel calculations have yielded similar outcomes. The goal of this research is to develop a mobile web-based application for recording data and calculating soil infiltration measurements using the DRI method. The research methodology involves transforming the measurement procedure into a concept, designing the application, and then implementing that design. By replacing the paper-based process, this application will enhance the efficiency, accuracy, and flexibility of soil infiltration measurement projects in various locations. Furthermore, the data will be stored in the cloud, allowing for crowdsourced infiltration data collection and monitoring from any location, including the office.
RANCANGAN MINE SEQUENCE PADA PENAMBANGAN BATUBARA UNTUK MEMENUHI TARGET PRODUKSI PIT J NORTH PT MULTI HARAPAN UTAMA, KABUPATEN KUTAI KARTANEGARA, PROVINSI KALIMANTAN TIMUR Alfianto, Danny; Ardian, Aldin; Inmarlinianto, Inmarlinianto; Soekamto, Untung; R.Horman, Juanita; Cahyadi, Tedy Agung
Jurnal Teknologi Pertambangan Vol. 9 No. 2 (2024): Januari 2024
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jtp.v9i2.11874

Abstract

PT Multi Harapan Utama (PT MHU) adalah perusahaan pemilik Izin Usaha Pertambangan (IUP) yang bergerak di bidang pertambangan batubara. PT MHU berlokasi di Kabupaten Kutai Kartanegara, Provinsi Kalimantan Timur. Salah satu area kerja PT MHU adalah pit J North, di mana sistem penambangan yang digunakan adalah sistem tambang terbuka dengan metode open pit coal mining. Penelitian ini bertujuan untuk membuat rancangan teknis penambangan batubara dari bulan Februari hingga April 2023. Berdasarkan desain bulan Februari 2023, didapatkan volume overburden sebesar 2.188.953 Bcm dan batubara sebesar 121.899 ton dengan SR 17,38 : 1; pada bulan Maret 2023, didapatkan volume overburden sebesar 2.206.138 Bcm dan batubara sebesar 117.476 dengan SR 18,78 : 1; pada bulan April 2023, didapatkan volume overburden sebesar 1.965.037 Bcm dan batubara sebesar 107.229 ton dengan SR 18,33 : 1. Rancangan disposalterletak di sebelah timur dari pit. Luas dari disposal adalah 52,7 Ha dengan kapasitas sebesar 8.640.258 Lcm. Berdasarkan desain, disposal yang diterapkan adalah teracce dump karena topografi di daerah penelitian relatif landai (author).
ANALISIS PERBANDINGAN REKOMENDASI KEBUTUHAN POMPA DENGAN PENAMBAHAN UNIT POMPA DAN PENINGKATAN RPM POMPA, STUDI KASUS DI PIT 01 PT. BANJAR BUMI PERSADA, KABUPATEN BANJAR, KALIMANTAN SELATAN Yulantoro, Marchell Yulfanzah; Cahyadi, Tedy Agung; Gunawan, Ketut; Rosadi, Peter Eka; Syafrianto, M. Khalid
Jurnal Teknologi Pertambangan Vol. 9 No. 2 (2024): Januari 2024
Publisher : Universitas Pembangunan Nasional Veteran Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jtp.v9i2.11878

Abstract

PT Tata Bara Utama merupakan kontraktor dari PT Pada Idi yang bergerak di bidang pertambangan batubara. PT Tata Bara Utama menetapkan terget produktivitas pengupasan lapisan tanah penutup sebesar 200 BCM/Jam dengan 2 fleet penambangan pada bulan Maret 2023. Produktivitas pada saat dilakukannya penelitian belum memenuhi target produktivitas yang sudah ditetapkan sehingga berdampak pada terlambatnya pengambilan batubara.Penelitian ini bertujuan untuk menganalisis faktor-faktor penyebab target produksi belum tercapai dan menentukan upaya-upaya yang dapat dilakukan untuk meningkatkan produktivitas di PT Tata Bara Utama. Berdasarkan perhitungan, produktivitas alat gali muat saat ini sudah mencapai target produktivitas yang mana nilainya untuk fleet 1 sebesar 269 BCM/Jam dan fleet 2 sebesar 252 BCM/Jam. Untuk  produktivitas alat angkut kedua fleet belum mencapai target yang mana nilainya untuk untuk fleet 1 sebesar 165 BCM/Jam dan fleet 2 sebesar 147 BCM/Jam.Berdasarkan hasil penelitian penyebab tidak tercapainya target produktivitas adalah lebar front area penambangan dan kecepatan alat angkut yang belum efisien sehingga menyebabkan cycle time  alat angkut menjadi tinggi.Upaya-upaya yang dilakukan untuk mencapai target produksi yaitu pelebaran area front penambangan dan simulasi rimpull  untuk meningkatkan kecepatan alat angkut yang nantinyaakan mengoptimalkan cycle time alat angkut. Setelah perbaikan didapatkan produktivitas alat angkut menjadi 229 BCM/Jam untuk fleet 1 dan 201 BCM/Jam untuk fleet 2.
Implementasi Sistem Manajemen Hot Work ke dalam Sistem Manajemen Keselamatan dan Kesehatan Kerja Wenny Kartika; Yohana Noradika Maharani; Johan Danu Prasetya; Tedy Agung Cahyadi; Widyawanto Prastistho
JURNAL RISET RUMPUN ILMU TEKNIK Vol. 3 No. 1 (2024): 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.v3i1.2715

Abstract

The Occupational Safety and Health Management System (SMK3) is part of the company's management system in general which aims to control risks associated with work activities in order to create a safe, efficient and productive work environment. PP RI Number 50 of 2012 issued regulations regarding the Implementation of the Occupational Safety and Health Regulatory System, and Article 5 of the Law requires every company to implement SPK3 in their company, especially for companies that employ a minimum of 100 (one hundred) workers/laborers or have a high level of potential hazard. Hot work Permit System is a system of written permission to do work that generates heat sources. This study aims to determine the implementation of SMK3 with hot work system management as fire and explosion prevention at PT. XYZ, Indramayu. It is recommended for companies to strengthen the application of safety culture by implementing a hot work permit system, organizing training for welding workers, and conducting socialization regarding standard operating procedures (SOP) in work behavior for all workers.
Sensitivity analysis of coal mine project investment using fuzzy model utami, Hasrin citra; Cahyadi, Tedy Agung; Ernawati, Rika
Jurnal Mineral, Energi dan Lingkungan Vol 8 No 1 (2024): Jurnal Mineral Energi dan Lingkungan, Volume 8, No 1 Tahun 2024
Publisher : Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v8i1.12396

Abstract

Investment analysis needs to be done to determine the feasibility of a project from an economic perspective. In this research, an investment analysis were applied in a coal mine project. The analysis were considering the results of NPV and IRR. NPV is the result of subtracting discounted costs [8]. IRR is an interest rate that shows the net present value is equal to the total amount of business investment [9]. The methods used in the analysis are the conventional method and the Fuzzy method. Conventional method is done by using NPV and IRR formula in Ms.Excel while Matlab for Fuzzy. The Fuzzy method apply a membership functions, namely triangular fuzzy number. The results of the analysis using conventional methods show an NPV value of $ 14,900,691 or IDR 223 Million with an IRR value of 69.8%. The results of the analysis using the fuzzy method with triangular membership functions showed the NPV values of IDR 232 Million and IRR 40.1 %. From the analysis, it can be seen that the fuzzy method is able to produce a larger NPV but a smaller IRR value whose value is close to conventional methods with the same input variables. So it can be concluded that the fuzzy method is quite well applied in investment analysis and it can help for the final decision of a project
Knowledge, Attitude, and Supervision Correlation Analysis in Improving Work Safety Using The Pearson Method at A Tin Ore Refining Company in The Jelitik Industrial Area of Bangka Regency Larasati, Ivana Ardhia; Ernawati, Rika; Haq, Shofa Rijalul; Nurkhamim, Nurkhamim; Cahyadi, Tedy Agung
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 12 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i12.8818

Abstract

Occupational safety is a crucial aspect, especially in the mining sector, which has a high risk of accidents due to various factors. These factors include knowledge, attitude, and supervision. Although PT Pemurnian Oreh Timah in the Jelitik Industrial Estate recorded a few incidents of work accidents that occurred in the last 1 year, the risk of work accidents still exists. This study aims to analyze the level of close relationship between independent variables, namely knowledge and attitude, knowledge and supervision, and attitude with supervision in the Engineering Department of PT Pemurnian Oreh Timah in the Jelitik Industrial Estate, Bangka Regency. Pearson's correlation test method was used to analyze questionnaire data from 68 workers in the company's engineering department. The results showed that there was a weak relationship (r = 0.311) between knowledge and attitude, as well as a moderate relationship (r = 0.502) between knowledge and supervision. A moderate relationship (r = 0.484) was also found between attitude and supervision. These findings show that these factors are interrelated, where it is hoped that effective supervision can increase workers' knowledge and attitudes towards occupational safety.
Sensitivity analysis of coal mine project investment using fuzzy model utami, Hasrin citra; Cahyadi, Tedy Agung; Ernawati, Rika
Jurnal Mineral, Energi dan Lingkungan Vol 8 No 1 (2024): Jurnal Mineral Energi dan Lingkungan, Volume 8, No 1 Tahun 2024
Publisher : Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v8i1.12396

Abstract

Investment analysis needs to be done to determine the feasibility of a project from an economic perspective. In this research, an investment analysis were applied in a coal mine project. The analysis were considering the results of NPV and IRR. NPV is the result of subtracting discounted costs [8]. IRR is an interest rate that shows the net present value is equal to the total amount of business investment [9]. The methods used in the analysis are the conventional method and the Fuzzy method. Conventional method is done by using NPV and IRR formula in Ms.Excel while Matlab for Fuzzy. The Fuzzy method apply a membership functions, namely triangular fuzzy number. The results of the analysis using conventional methods show an NPV value of $ 14,900,691 or IDR 223 Million with an IRR value of 69.8%. The results of the analysis using the fuzzy method with triangular membership functions showed the NPV values of IDR 232 Million and IRR 40.1 %. From the analysis, it can be seen that the fuzzy method is able to produce a larger NPV but a smaller IRR value whose value is close to conventional methods with the same input variables. So it can be concluded that the fuzzy method is quite well applied in investment analysis and it can help for the final decision of a project
Co-Authors A. Belo, Delia Ximenes Abdul Halim Pelu Achmad Sadikin Agung Yulianto Nugroho Agustian, Yusrian Aisyah Salma Aji Lambang Hidayah aldin ardian, aldin Alfianto, Danny Algifari, Arif Aminuyati Amrin, Dedy Andrawina Wina Angggian R., Shahensah Anand Anggoro, Hengky Ansori, Muhammad Iqbal Anton Sudiyanto Anton Sudiyanto Ardinanta, Desta Nugraha Arif Munandar Arrina Khanifa Astika Putri Roshinta Bagus Wiyono Bagus Wiyono Bambang Dwijo Pranowo Barlian Dwinagara Bimantoro, Adyaksa Bagas Butungan, Jeragustivia Dahono Haryanto Dedy Amrin Deka Citra Dinata Delia Ximenes A. Belo Divina Maria Marques Doni Firdaus Fadlil Dwi Januar Ariyanto Dwi Mayanti Mega Lesmana Dwi Poetranto Waloeyo Adji Dwi Yolanda Sumbung Dyah Nunki Yalesrie Eddy Winarno Eddy Winarno Eddy Winarno, Eddy Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Edy Nursanto Eman Widijanto Erwedi Erwedi Erwedi, Erwedi Fadlil, Doni Firdaus Faizal Agung Riyadi Ficky Adi Kurniawan Firmansyah, Ilham Fitri Nauli Fitriani Fitriani Gabriel Ranteallo Gandar Mahojwala Genadi Toar Nainggolan Gunawan Nusanto Gunawan Nusanto, Gunawan Gunawan, Risal Habibah, Annisa Ummu Hadi Purwanto Halimah Tusak Diah Hana Trijayanti Haq, Shofa Rijalul Hartono Hartono Hartono Hartono Hartono Hartono Hartono Sihir Hasywir Thaib Siri Hasywir Thaib Siri Hasywir Thaib Siri hasywir thaib siri, hasywir thaib Hendriono, Hendriono Hengky Anggoro Herlina Jayadianti Herniti, Dwi Heru Suharyadi Ifa Aulia Chusna Ilham Firmansyah Imawati, Rika Indah Setyowati Indah Setyowati Indun Titisariwati Indun Titisariwati Indun Titisariwati Indun Titisariwati, Indun Inmarlinianto Inmarlinianto, Inmarlinianto Jeragustivia Butungan Jeremia Christopher Herbert Siregar kadek nando setiawan nando Karel Lutan Warda Ketut Gunawan Ketut Gunawan Khanifa, Arrina Kresno Kresno Kresno Kresno Kurniawan, Fitra Kusumayudha, Sari Bahagiarti Larasati, Ivana Ardhia Leka, Emil Salim Kahmi Lesmana, Dwi Mayanti Mega Lilik Eko Widodo Linggasari, Shenny M. Rahman Yulianto Marganiswati, Yudha Tintana Mariatul Kiptiah Marques, Divina Maria Masjon Parhusip Mendrofa, Yudha Chrisman Moh Ardiansyah Monica Warih Widi Krisanti Muhammad Arifin Nur Muhammad Fathurrahman Pitayandanu Muhammad Iqbal Ansori Muhammad Tri Aditya Muhammad Wildan Ilyasa Nainggolan, Genadi Toar Notosiswoyo, Sudarto Nugroho, Arif Rianto Budi Nur Ali Amri Nur Ali Amri Nur Ali Amri Nur Ali Amri, Nur Ali Nurkhamim Nurkhamim Nurkhamim Nurkhamim, Nurkhamim Pambayu, Aldio Kresna Pasa, Titis Ilham Permadi, Fajar Peter Eka Rosadi Peter Eka Rosadi, Peter Eka Pramono, Sidik Prasetya, Johan Danu Prastistho, Widyawanto Prawira, Hadi Putranto, Fery Izzan R.Horman, Juanita Rahmat Aditya Ramadhana Adi Rusyada Rendy Fahlevi Resa Risal Pradita Reza Adhi Fajar Rika Ampuh Hadiguna Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Ernawati Rika Imawati Risaldi Hidayat Riyadi, Achmad Riyadi, Faizal Agung Rusdi Darmawan S. Koesnaryo Sabrina Umi Khabibah Sari Bahagiarti Kusumayudha Sari Bahagiarti Kusumayudha satria fitrio SB, Waterman Septianto, Erwin Setiyawa, Meindra Shahensah Anand Angggian R. Shofa Rijalul Haq Sigit Bagus Prabowo Singgih Saptono, Singgih Siregar, Imerilda Parlina Soekamto, Untung Stephanus Maria Eduat Sudarto Notosiswoyo Sudaryanto Suharsono Suharsono Suyono Suyono Suyono Suyono Suyono Syafrianto, Syafrianto Syamsul Arifin Syari Rahma Yanti Syihab, Zuher Tasidjawa, Gabriela Elisabeth Totok Sulistyo Tri Aditya, Muhammad Ulfa Nindya Kesuma Warsito utami, Hasrin citra Vega Vergiagara Vinansius Jimmy Jati Waterman SB Waterman SB Waterman SB Waterman SB Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa Waterman Sulistyana Bargawa, Waterman Sulistyana Wawong Dwi Ratminah Wawong Dwi Ratminah, Wawong Dwi Wenny Kartika Widijanto, Eman Widodo, Lilik Eko Widyawanto Prastistho Winda Winda Yohana Nodarika Maharani Yohana Noradika Maharani Yohanes Ary Prayoga Yulantoro, Marchell Yulfanzah Zuher Syihab