mining of thick orebodies in a series of stopes from top to bottom, the roof being caved with its timbers as each stope is exhausted.
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British Dictionary definitions for top slicing
the act or process of using a specific part of a sum of money for a special purpose, such as assessing a taxable gain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012