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| COMMERCIAL TESTS FOR RECOVERY OF ORE PILLARS IN A BRECCIA-TYPE DEPOSIT BY MINING METHOD WITH MEDIUM-LENGTH HOLES |
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Revised:April 05, 2004
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| DOI： |
| KeyWord:Gold ore mining,Breccia deposit,Medium-length hole blasting,Ore pillar recovery |
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| Abstract: |
| In order to tackle the problems of recovering ore pillars in a large breccia deposit, commercial tests for mining method with medium-length holes were carried out in breccia deposit No 2. Two blasts were successful and ore volume of 28600 tons was broken. The testing results show that mining efficiency is greatly improved and mining period is markedly shortened, thus reducing the overstocked funds and gaining obvious economic benefit. The mining method with medium-length holes is a high-effective method for mining of large breccia deposits with low-grade ore. |
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