vrm vertical crater retreat – Grinding Mill China Vertical Crater Retreat: an Important New Mining … Document Summary for "Vertical Crater Retreat: an Important New Mining Method" » Learn More vertical rotary grinder A SIMPLIFIED ECONOMIC - USGS A SIMPLIFIED ECONOMIC " . from mining method to mining method and, . For vertical crater retreat the capital expenditure = 42,200 C 0.747 (6) vertikal craser - newyorkpublicschool.in Vertical crater retreat QueensMineDesignWiki. Vertical crater retreat (VCR), also known as Vertical retreat mining, is an open stoping, bottomup mining method that involves vertically drilling largediameter holes into the orebody from the top, and then blasting horizontal slices of the orebody into an undercut. Service Online
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Design and Application of Sublevel Stoping Methods - Edumine
Introduction. This course refers to the generic mining method of sublevel stoping. The most commonly used sublevel stoping mining methods are sublevel open stoping, long-hole open stoping or blasthole stoping, and vertical crater retreat (VCR).