Collapsible cushion
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United States of America Patent
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Apr 23, 2013
Grant Date -
Nov 25, 2010
app pub date -
Nov 12, 2009
filing date -
May 20, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A method of mining a valuable metal or material in an ore body is described. The method comprises the steps of: a) placing a cushion in a stope whereby the cushion creates a void into which fragmented rock can expand during subsequent blasting operations for a second or subsequent panel; and, b) maintaining the void until blasting operations occur whereupon the void is caused to collapse to accommodate fragmented ore generated during blasting operations.
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