Laura Puspita Sari, Faturrahmat Widodo

Optimalisasi Fragmentasi dengan Metode KUZ-RAM pada Penambangan Batu Andesit

Introduction

Optimalisasi fragmentasi dengan metode kuz-ram pada penambangan batu andesit. Optimalisasi fragmentasi batuan andesit di penambangan Batujajar 1 menggunakan metode KUZ-RAM. Kurangi boulder hingga 0.18% dengan geometri peledakan presisi, hemat biaya produksi.

Abstract

The main activities at a mining site consist of stripping the overburden, unloading by blasting and surface mining, loading and transporting from the mining location to the crushing location. Blasting is an activity in mining that is carried out with the aim of dismantling the rock from its source rock into a predetermined size to facilitate further processes such as loading and crushing and a set production target. The less boulder, the better the resulting fragmentation because it will reduce the production costs for crushing the boulder to be smaller. This research focuses on blasting geometry planning as a parameter that is considered important in changing the size of the blasting rock fragmentation. The andesite blasting activity at the Batujajar 1 mine still found a fairly large percentage of rock blocks. Based on field observations, rock blocks resulting from blasting activities in the Batujajar 1 quarry are as follows: burden (B) 2.4 m, space (S) 3.1 m, stemming (T) 1.8 m, subdrilling (J ) 0 m, height (L) 6 m, into the blast hole (H) 6 m, column of explosives (Pc) 4.2 m, explosive material as much as 11.07 kg / hole. The drilling pattern applied is a staggered pattern and corner cut blasting pattern which is blasted in a row for each line with a delay time of 25 ms. The proposed geometry is calculated by calculating RL Ash 1963. With the theoretically proposed blasting geometry the results of rock chunks measuring> 80 cm according to RL Ash 1963 are 0.18%, then selected with the 1963 RL Ash theory, the results of rock fragmentation sizes are> 80 cm is 0.18%, this amount is better than the actual rock fragmentation which is still 9.11%, with the reduced number of boulders it is expected that production activities will run better.

Review

The paper titled "Optimalisasi Fragmentasi dengan Metode KUZ-RAM pada Penambangan Batu Andesit" addresses a pertinent issue in mining operations: the optimization of rock fragmentation to enhance efficiency and reduce costs. The authors identify a common problem at the Batujajar 1 andesite mine where current blasting practices result in a high percentage of oversized rock blocks, leading to increased expenses during the crushing phase. The core objective is to improve fragmentation by optimizing blasting geometry, a critical parameter in blast design, through theoretical calculations based on the RL Ash 1963 method. A key strength of this research lies in its direct practical applicability and the quantifiable nature of its findings. The study clearly outlines the current blasting parameters and the resulting inefficiency, with 9.11% of rock fragments exceeding 80 cm. By proposing an optimized blasting geometry using the RL Ash 1963 theory, the authors project a substantial reduction in oversized material to a mere 0.18%. This dramatic theoretical improvement highlights a significant potential for cost savings in subsequent crushing operations and increased overall productivity, making the research highly relevant for mining engineers and operators. However, the abstract presents some areas for clarification and potential enhancement. A notable discrepancy exists between the title, which references the "KUZ-RAM method," and the abstract's body, which exclusively details calculations based on "RL Ash 1963." Clarifying the relationship or integration of these two methodologies is essential. Furthermore, while the theoretical projections are compelling, the abstract does not indicate whether the proposed optimal geometry has undergone any field trials or experimental validation. Implementing and testing the new geometry in real-world conditions would significantly strengthen the conclusions. Lastly, a more explicit economic analysis detailing the expected cost reductions from the improved fragmentation would further underscore the practical value and impact of this research.

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