RAINFALL DATA ANALYSIS FOR MINE WATER MANAGEMENT
Problems related to excessive water quantity mainly arise due to analysis of water management at the mine site that has not been done well at the mine planning stage. Therefore it is necessary to analyze the management of water in the mine that specifically adjusts needs, including the need for open...
Saved in:
| Main Author: | |
|---|---|
| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/46188 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Problems related to excessive water quantity mainly arise due to analysis of water management at the mine site that has not been done well at the mine planning stage. Therefore it is necessary to analyze the management of water in the mine that specifically adjusts needs, including the need for open drainage facilities, the need for pit sumps for operation and the speed of filling pit lakes during post-mining.
Frequency analysis is done with the daily rainfall-design approach for the need for open drainage facilities and weekly rainfall-design for pit sump needs. There are four methods used to calculate the rainfall-design TR return period, namely the Normal, Normal Log, Gumbel and Pearson III Log methods. Meanwhile the Monte Carlo simulation was carried out to predict the rainfall used in the analysis of water management related to the speed of filling water in the pit lake during post-mining.
Based on the results of distribution analysis, it is found that the Gumbel method is the best method in calculating daily rainfall-design for the analysis of the need for open drainage facilities in the mining area. Meanwhile, for the analysis of pit sump needs for operations on the mining front with a return period of <10 years the Log Normal and Log Pearson III methods are the best method, while for the return period> 10 years the Gumbel method is the best method in calculating weekly rainfall-design. Meanwhile, based on the Monte Carlo simulation for the analysis of pit lake filling speed in the post mining period, it was found that the lowest rainfall occurred in September 2018 of 78.2 mm, while the highest rainfall was predicted to occur in December 2018 of 268.35 mm . Meanwhile, the total accumulation of rainfall that occurred during the 2015-2018 period is predicted to reach 8093,8 mm. |
|---|