https://e-journal.upr.ac.id/index.php/JT <p><img src="https://e-journal.upr.ac.id/public/site/images/journal/journalThumbnail_en_US2.jpg" /></p> <p>Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan adalah jurnal ilmiah yang diterbitkan 2 kali setahun pada Bulan April dan Oktober oleh Fakultas Teknik Universitas Palangka Raya, Nomor ISSN 2620 8334.</p> Fakultas Teknik Universitas Palangka Raya en-US Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan 2620-8334 https://e-journal.upr.ac.id/index.php/JT/article/view/11160 <p><em>Open-pit mining can lead to the degradation of environmental quality in the areas where mining activities occur, one of which is the presence of mining wastewater that can disrupt ecosystems. The purpose of this study is to understand the liming process on mining wastewater samples and to determine the effect of quicklime on the quality of mining wastewater. The methods used in this research include qualitative and descriptive approaches. The research location is at CV. BK in Lemo I Village, Teweh Tengah District, and Bintang Ninggi I and II Villages in Teweh Selatan District. The study was conducted in early 2023. The data for this research consists of primary data, including mining wastewater samples, the quality of mining water, and doses of quicklime; as well as secondary data, including environmental management maps, regional geological maps, and location maps.</em></p> Aron Purba Fahrul Indrajaya Noveriady Noveriady Syarifah Aulia Copyright (c) 2024 Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan 2024-10-31 2024-10-31 8 1 1 6 https://e-journal.upr.ac.id/index.php/JT/article/view/11114 <p>This study aims to analyze the level of fatigue risk in dump truck (DT) operators at PT. BP located in Tumbang Olong I Village, Uut Murung District, Murung Raya Regency, Central Kalimantan Province. DT operators at PT. BP are involved in hauling work with a distance of approximately 140 km from stockpile to port. The hauling which takes approximately 6 hours is carried out with a certain trip system and speed limit. Using a qualitative approach and descriptive analysis, this study identified fatigue risk factors including work duration, work shift, rest time, workload, work environment, physical condition, sleep time, stress, and food/drink consumption patterns. Primary data (age, length of service, education, and questionnaire) were combined with secondary data (location map and delivery area, regional geological map, local geological map of IUP research area). Fatigue risk was measured through the SNI ISO 31000 standard, with risk mapping using a 5x5 risk matrix. The results of the study showed that fatigue factors consist of work and non-work factors, with four categories of risk levels: low (workload), medium (sleep time, physical condition), high (rest time, work shift, work environment, stress), and very high (work duration, food/drink). Based on these findings, company intervention is needed to control risks that are in the high and very high categories</p> Lilik Gunawan Neny Sukmawatie Ferra Murati Arum Chofifah Nuranisa Copyright (c) 2024 Jurnal Teknika: Jurnal Teoritis dan Terapan Bidang Keteknikan 2024-10-31 2024-10-31 8 1 7 14