STUDY OF CARBON MONOXYDE GAS DIFFUSION POST BLASTING AT CIGUHA PT ANTAM UBPE PONGKOR UNDERGROUND MINE

• Main Author: Hanif Agson Gani, Putra
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/54553
• Institution: Institut Teknologi Bandung

Blasting is one of the most important thing to do in an underground mine, whether for development phase or production. Blasting which takes place inside a mine will trapped poisonous and dangerous gas in that area. So, a good mine ventilation is needed to overcome this problem. A comprehensive study is needed to know the effective re-entry time. This study takes place at Ciguha UBPE Pongkor underground mine. The analysis consists of the study of mine ventilation generally, reduction of CO gas concentration and diffusion coefficient. At the end of the study, the re-entry time formula will be determined. The re-entry time of formula could become a standard to determine how long the smoke clears at the certain location. Diffusion coefficient will be found by comparing diffusion coefficient analytic (Taylor, 1954) and diffusion coefficient by the result of the survey. The dispersion of CO gas is a site specific, so the formula can only be applied at the location which the study takes place. The diffusion coefficient value for each place are : X-Cut 477 is 0.37 m2/s, X-Cut 475 is 6.57 m2/s, and Footwall RD CGS is 4.91 m2/s. The result of the reentry time is found by comparing L/D with the time dispersion of CO gas.