STUDY OF LEAKAGE CHARACTERISTICS AT THE WORKING FACE DUE TO RUPTURE VARIATIONS IN LOCAL VENTILATION DUCT USING COMPUTATIONAL FLUID DYNAMICS

• Main Author: Yahya Ayyasy, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85390
• Institution: Institut Teknologi Bandung

A good mine ventilation system must meet the air requirements necessary for equipment and workers to operate optimally. However, the air introduced into the mine does not all reach the work front, so air demand is not met. One of the factors causing this problem is the rupture of the air duct pipe. This study aims to determine the effect of rupture in the air duct pipe on air leakage characteristics by using the Computational Fluid Dynamics (CFD) method in numerical simulations. The simulation is carried out using Ansys Fluent 2024 software with a model that has been validated based on Ivana's research (2021). The model used is a beam-shaped mine tunnel with a geometry of 4 m high and 5 m wide and an air duct pipe diameter of 0.85 m. The simulation was conducted using a near-forward ventilation system. Tests were conducted using a near-forcing-far-exhausting (NFFE) ventilation system. A wide variety of rupture locations and sizes were tested to assess the leakage rate in the duct. The results show that air leakage has a relationship directly proportional to rupture size and inversely proportional to rupture location. The equation for calculating rupture leakage based on rupture size and location is: Air leakage (%) = (67.613-0.4495d - 0.0091d2)A. To meet the minimum air demand of the underground mine with duct sheath area 154,88 m2, the maximum allowable rupture size is 0.193 m2.