ANALYSIS OF HEAT DISTRIBUTION ON VENTILATION NETWORK IN RAMP DOWN 450 KUBANG CICAU MINE UBPE ANTAM PONGKOR

• Main Author: YULIANTI (NIM : 22115016), RIRIN
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30526
• Institution: Institut Teknologi Bandung

One of the mine sites in UBPE Antam Pongkor is ramp down 450 mines Kubang <br /> <br /> Cicau, complained by workers with the atmosphere of a hot working environment. <br /> <br /> The result of identification of the heat source located at that location consists of a <br /> <br /> permanent and non-permanent heat source. Permanent heat sources include <br /> <br /> autocompression and illumination. While non-permanent heat sources include <br /> <br /> electrical equipment, diesel equipment, explosives, human metabolism, and fan <br /> <br /> compressibility. The percentage of heat generated from autocompression is 10% in <br /> <br /> 24 hours duration, 1% light in 24 hours duration, 37 kW 19% auxiliary fan 19% in <br /> <br /> 18 hours duration, 75 kW 5% booster fan in 18 hours duration, 16% LHD in <br /> <br /> duration 9 hours, 10% wheel loader in duration of 9 hours, 21% light vehicle in <br /> <br /> duration of 3 hours, blasting heat with 1% blasting smoke in 2 hours duration, <br /> <br /> blasting heat trapped in rocks by% in 24 hours duration, human metabolism 6% in <br /> <br /> 18 hours duration and 10% fan compressibility within 18 hours. <br /> <br /> Increased heat at the study site was due to the occurrence of air recirculation in <br /> <br /> the ventilation tissue. Air temperature will increase when the heat source is not <br /> <br /> permanently operating. The increase in temperature is ± 2 ° C (32.6 ° C to 34.5 ° <br /> <br /> C) in just 1.5 hours. The air temperature will come back down when the nonpermanent <br /> <br /> heat source stops operating. The rate of decline is only about 0.1 ° C / <br /> <br /> hour. The length of the rate of decline caused the heat to be trapped long enough <br /> <br /> so that the temperature was difficult to decrease to achieve the permissible working <br /> <br /> environment condition of 30oC (Regulation of the Minister of Health of the <br /> <br /> Republic of Indonesia No. 70 of 2016). <br /> <br /> An effective heat control strategy is applied at the research site by elimination and <br /> <br /> technique control. The heat control with elimination will incur lower cost which is <br /> <br /> only the initial investment cost but the work productivity only reaches 2 - 4 <br /> <br /> hours/shift while the technique control will cost higher but will create work <br /> <br /> productivity optimally 4 - 6 hours/shift. However, for current development <br /> <br /> conditions better heat control is accomplished by elimination. <br />