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All Journal Jurnal Pendidikan IPA Indonesia JURNAL PERTAMBANGAN
Saputra, R.
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The Influence of Rare Plants Exploration in Taman Eden 100 Lumban Julu on Students' Science Process Skills Manurung, N.; Tarigan, M. R. M.; Saputra, R.
Jurnal Pendidikan IPA Indonesia Vol 12, No 3 (2023): September 2023
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v12i3.42696

Abstract

This study aims to determine the significant effect of rare plant exploration activities in Taman Eden 100 Lumban Julu on students’ Science Process Skills (SPS) levels for deepening Biology learning material. The research method used was quasi-experimental with a significance level of α = 0.05. The data analysis technique used the group average effect test. The results showed that the result of the normality test on the pretest Lo Ltable was 0.1826 0.190 and on the posttest Lo Ltable was 0.1707 0.190, and the homogeneity test results obtained Fcount Ftable = 1.83 2.12. Hypothesis testing calculations obtained tcount ttable = 25.50 1.72. This study concludes that the level of students’ SPS by doing exploration has a significant influence. This can also be seen from the results of calculating the final increase (gain) score, where the gain value for each indicator is classified as medium and high. This shows that the science process skills possessed by students have increased.
ANALYSIS OF SIDEWALL SLOPE STABILITY USING THE BISHOP METHOD AT PT BATU HITAM JAYA, JAMBI PROVINCE Saputra, R.; Asof, M.; Purbasari, D.
Jurnal Pertambangan Vol. 9 No. 4 (2025): November 2025
Publisher : Fakultas Teknik Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jp.v9i4.3216

Abstract

A slope failure occurred at the lowest bench of the open-pit coal mine operated by PT Batu Hitam Jaya in Jambi, Indonesia, in early February 2025. The failure, measuring 16 meters wide, 5 meters high, and sloped at 38°, critically impacted an access road to the disposal area, disrupting operations and escalating safety risks. This failure disrupted mining operations and increased safety risks, highlighting the need for slope stability analysis to evaluate the safety of the existing slope design and to prevent recurrent failures. This study aims to identify the geotechnical parameters of the sidewall material, analyze the stability of the existing slope, and propose a safer slope redesign. Slope stability analysis was conducted using Rocscience Slide software based on the Mohr–Coulomb failure criterion and the Bishop Simplified method, which was selected due to its effectiveness in evaluating slopes with circular potential failure surfaces in open-pit mining conditions. The critical failure surface was determined using the Grid Search method. Initial analysis revealed Factor of Safety (FoS) values of 0.927 and 0.942, confirming the slope's unstable condition. Following a geometry redesign, the FoS values successfully increased to 1.302 and 1.244. These enhanced values classify the slope as significantly more stable and safe, ensuring reliable support for ongoing mining operations.
Co-Authors Asof, M. Manurung, N. Purbasari, D. Tarigan, M. R. M.