PERFORMANCE STUDY OF LOADING AND HAULING AT THE ANDESITE QUARRY OF PT ABC, BOGOR REGENCY, WEST JAVA
PT ABC is an andesite mining company located in Bogor Regency, West Java with a production target of 121,577 tons in October 2020. During October and several months in 2020, the production target was not achieved. The study carried out on bench 9 found that there was a long waiting time for the a...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/57584 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | PT ABC is an andesite mining company located in Bogor Regency, West
Java with a production target of 121,577 tons in October 2020. During October
and several months in 2020, the production target was not achieved. The study
carried out on bench 9 found that there was a long waiting time for the arrival of
the hauling units when broken rock was hauled to plant A. Therefore, in this
research, a study which produces alternative improvements to production activities
in order to reach the company’s targets will be conducted.
The data taken by direct observation in the field are cycle time, the number
of loading and hauling units used and the hauling distance. Meanwhile, data of
haul road conditions, available working hours, production targets, and units
specifications are obtained from PT ABC and literatures.
After calculating the actual condition, the production activities of loading
unit, hauling units and match factors are 358.73 tons/hour (119% target), 227.03
tons/hour (75% target), and 0.63 respectively. It can be seen that the hauling
activity is the cause of the problem. Therefore, 3 evaluations that will be carried
out in this study, namely they are decreasing the road grade only, decreasing the
road rolling resistance only, and decreasing the grade and rolling resistance of the
road. This evaluation is aimed to reduce the hauling time of both loaded and empty.
Based on the evaluation results, the estimated production and match factor are as
follows: 230.67 tons/hour (76% target) and 0.64 respectively, if decreasing the
road grade only; 293.58 tons/hour (97% target) and 0.82 respectively, if decreasing
road rolling resistance only; 268.61 tons/hour (89% target) and 0.75 respectively,
if decreasing the grade and rolling resistance. |
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