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block caving |
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block caving [′bläk ‚kāv·iŋ]
(mining engineering) A method of caving where a block, 150-250 feet (46-77 meters) on a side and several hundred feet high, is induced to cave in after it is undercut; the broken ore is drawn off at a bell-shaped draw point. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | Several Australian mines also rely on the inexpensive block caving method of mining where large blocks of ore are undercut, causing the ore to cave in under its own weight and be easily scooped up. The original production site in Cangalli was chosen in 2002 for two reasons: first, a relatively good gold grade in that portion of the large, low-grade ore deposit; and second, and perhaps more importantly, a sizeable, available impoundment area needed for the disposal of a large volume of tailings generated by the original block caving mining method. TPS, which targets high-grade gold bearing paystreaks, if as successful as currently projected, could result in the company's current 3,500 tpd plant recovering the same volume of gold previously projected from three 11,000 tpd recovery plants using block caving conal subsidence. |
block caving |
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