what are the key features of open cast mining?
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open pit ,open cast or open cut mining is a surface mining technique of extracting rock or minerals
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Opencast mining operations involve huge quantities of overburden removal, dumping and backfilling in excavated areas. A substantial increase in the rate of accumulation of waste dumps in recent years has resulted in greater height of the dump for minimum ground cover area and also given rise to danger of dump failures.
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