open stope

open stope

[′ō·pən ′stōp]
(mining engineering)
Underground working place that is unsupported, or supported by timbers or pillars of rock.
References in periodicals archive ?
The company is also employing a new mining method to boost production levels by transitioning from large open stope blast hole mining to sub-level shrinkage (SLS), a variation of sub-level cave mining where waste fill will be introduced to the top of the cave.
3 900 3710-3880 2010 (9281) Date Remarks February 18, No damage to mine openings 2009 September 30, No damage to mine openings 2010 but 80-1001 of trap dyke material was sloughed into the open stope October 2, No damage to mine openings 2010 October 4, No damage to mine openings 2010 October 4, No damage to mine openings 2010 October 5, Some minor surface cracks in 2010 shotcrete October 15, Minor damage to ground sup- 2010 port system and some floor heaving
NAM-033 and NAM-034 (Figure 3) were drilled below the previously reported NAM-008 (Press Release Aug 2011) which intersected an open stope at the target depth.
The report also highlights a conceptual mine plan combining open pit mining and sublevel, open stope underground mining.
5-kilometre ramp, turn a corner, and arrive at the edge of an open stope, where it would need to extend a robotic arm and fire off a laser scanner.
Open Stope Design at Normandy Golden Grove Operations
Extensive primary underground development may provide easy access for open stope mining by adit access.
In massive open stoping areas, the sub-outcrop of the reefs coincides with reduced waste middling between the reefs, and this package of multiple, steep reefs lends itself to the creation of a large massive open stope.
Recent work has indicated the presence of bonanza gold shoots resulting in a revised calculation in the preliminary resource for open stope mining by adit access.
The limiting of open stope strike length by introducing pillars minimises their effect on the stope stability.
This permits large scale open stope techniques to be used even when rock conditions are relatively poor, thereby allowing more selective, and therefore more productive, mining.