ANALISIS GROUND VIBRATION PADA PELEDAKAN DI PIT EDELWEIS PT. RIUNG MITRA LESTARI JOBSITE MULTI TAMBANGJAYA UTAMA

Abstract

1. Riung Mitra Lestari is a mining contractor operating at Jobsite Multi Tambangjaya Utama, located in Gunung Bintang Awai District, South Barito Regency, Central Kalimantan Province. The overburden removal process is carried out using the drill and blast method. Blasting activities not only aim to fragment rocks but also need to consider environmental impacts, particularly ground vibration, which is measured using the Peak Particle Velocity (PPV) parameter. This study aims to analyze the correlation between predicted and actual PPV values and to determine an optimal and safe blasting design according to the Indonesian National Standard (SNI 7571:2010) with a maximum limit of ≤ 2 mm/s. Field data were obtained using a Micromate Instantel during May–June 2025 and analyzed quantitatively using the power regression method to model the relationship between scaled distance (SD) and PPV. The analysis produced the equation PPV = 90.183,95 )^–2.643 with a determination coefficient (R²) of 0,8596, indicating a prediction accuracy of 85,96%. The measured PPV values ranged from 1,221 to 3,404 mm/s, with several results exceeding the safety limit. Based on the evaluation, the Echelon blasting pattern with a 17 ms delay interval is recommended, as it effectively reduces PPV below the standard and provides more stable vibration control compared to the Box Cut pattern.