Chapter 74 Mining and Quarrying MINING: AN OVERVIEW. Norman S. Jennings. Minerals and mineral products are the backbone of most industries. Some form of mining .
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Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. Barren — Said of rock ...
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THE BASIC PROCESSES OF GOLD RECOVERY INTRODUCTION. Man has held a fascination with recovering and acquiring gold almost since the beginning of time.
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