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All Journal Journals Mining Engineering : Bina Tambang Science and Environmental Journals for Postgraduate Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya
Suhendrinal Suhendrinal
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Mathematics Physics Public Health Social Sciences Other

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Analisis dan Rancangan Pola Peledakan pada Lapisan Interburden K37 – K39untuk Mendapatkan Fragmentasi yang Sesuai dengan Alat Muat di PT. Asmin Koalindo Tuhup, Kalimantan Tengah Suhendrinal Suhendrinal; Raimon Kopa
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1842.245 KB) | DOI: 10.24036/bt.v3i4.102265

Abstract

Abstract.PT. Asmin Koalindo Tuhup is one of the industries engaged in coal mining, which is located in the Central Kalimantan region. Karaketeristik of cover rock in the area pit 7 and pit 8 interburden K37 and K39 with a thickness of 27 meters with different layers of mudstone material, siltstone and sandstone. The average thickness of the siltstone material is 3-5 meters and its position is in the upper layer which will be used as a stemming column during blasting. So that it is very influential on the results of blasting later, so it is necessary to do a blasting design to minimize the impact due to the condition of the layer. In the first actual blasting, >1 meter fragmentation value 31.69%, actual blasting of second fragmentation values ≥ 1 meter 26.8% and actual blasting of the third fragmentation value ≥ 1 meter 17.9%. Of the three results of the blasting it was not in accordance with the results of targeted fragmentation (≤ 15%). To minimize the results of the test, the geometry of the blasting is carried out. Based on the results of the study obtained the results of analysis and improvement on the proposed blasting pattern obtained mentasi 1 meter fragmentation using the calculation of wipfrag 0 software from the three proposals. The percentage of boulder ≤ 60 cm based on Kuzram has been below the target of 15% with a value of 6.57%, 6.45% and 6.16%. The digging time value has been below the company's target of 12 seconds, with a value of 10.21 seconds, 9.42 seconds and 10.45 seconds from the performance of the Liebherr R 9250 excavator excavator.Keywords:blasting, fragmentation, design, boulder, coal
The Relationship between Knowledge and Behavior of Local Communities in Maintaining Environmental Conservation: Literature Review Suhendrinal Suhendrinal; Abdul Razak; Nurhasan Syah; Skunda Diliarosta
Science and Environmental Journal for Postgraduate Vol 6 No 1 (2023): Science and Environmental Journals for Postgraduate (SENJOp)
Publisher : Postgraduate School, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/senjop.v6i1.221

Abstract

This study aims to determine the relationship between knowledge and behavior of local communities in preserving the environment. This type of research is research that uses the literature review method. Literature review research is a method in research to identify, evaluate, and interpret research results that are relevant to a particular research topic, or phenomena that are the focus of research conducted by reviewing scientific articles in a structured and planned manner. In this study, it is known that knowledge has a relationship with people's behavior in maintaining, managing, and utilizing the environment properly without damaging the environment. This is based on the knowledge gained that makes people aware of the importance of protecting the environment so that it can be used by the next generation.
Evaluation of Noise Levels on the Health of Mine Workers in the Drilling Machine Area Suhendrinal Suhendrinal; Nurhasan Syah; Heri Prabowo; Widya Prarikeslan; Muhamad Sholichin; Nabila Azzahra
Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Vol. 6 No. 3 (2026): Lambda
Publisher : Lembaga Bale Literasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/lambda.v6i3.5218

Abstract

This study aimed to describe noise levels in the drilling machine area, characterize noise dispersion patterns, identify workers' self-reported health complaints, and recommend appropriate noise control measures at PT. Dempo Bangun Mitra. A descriptive-analytic study with a cross-sectional design was employed. Data were obtained from direct noise measurements using a Sound Level Meter at 11 observation points located 0–100 meters from the noise source and questionnaires administered to 20 workers. Questionnaire responses were summarized descriptively to determine the frequency and percentage of reported health complaints and hearing protection use. The results showed that 9 of the 11 measurement points (81.82%) exceeded the 85 dB(A) reference limit. The highest noise level was 105.43 dB(A) at 0 meters, while the lowest was 71.63 dB(A) at 100 meters. An iso-dB(A) map showed that the highest noise concentrations occurred in the western to northwestern sections of the study area, with measured noise levels falling below 85 dB(A) at distances of approximately 90 meters and beyond. This distance represents an observation specific to the study site and should not be interpreted as a universal safety threshold. All respondents reported occasional ear discomfort, ringing in the ears, and sleep disturbances; 75% reported headaches, 60% reported difficulty concentrating, and 80% reported being disturbed by noise. Consistent use of hearing protection equipment was reported in only 55% of cases. These descriptive findings indicate the coexistence of elevated noise levels and self-reported health complaints but do not establish a causal relationship between noise exposure and these complaints. The findings support a tiered noise control strategy incorporating engineering controls, exposure duration management, worker rotation, appropriate hearing protection, regular noise monitoring, and periodic audiometric testing, formalized through a Standard Operating Procedure (SOP). The cross-sectional design limits causal interpretation, and defining an appropriate safe working zone requires further assessment of exposure duration, operational variability, and noise levels measured at representative times.
Co-Authors Abdul Razak Heri Prabowo Muhamad Sholichin Nabila Azzahra Nurhasan Syah Raimon Kopa Skunda Diliarosta Widya Prarikeslan