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 ?
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.
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.
Extensive primary underground development may provide easy access for open stope mining by adit access.
Underground drilling, stope access and development, and mining using an open stope method is currently taking place in the North and West Extension zones of the G-9 deposit.
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 results of rock mechanics studies and the physical stability of the rib and back of the stoped area indicate that ground conditions are amendable to open stope mining methods, which could reduce the mining cost significantly from the drift and infill mining methods originally expected.
45 76 84 8 open stope, no recovery 88 90 2 open stope, no recovery 150 154 4 open stope, no recovery 154 176 22 2.
It is believed that the hole passed through an open stope from prior mining.
Sampling by Dia Bras geologists (see below) of the San Jose vein yielded high grades of silver in highly-oxidized outcrops, old prospect pits and shallow open stopes.
This developed large open stopes (ten to forty meters) on the mineralization.
Some adits, presumably connected by open stopes, are currently inaccessible due to collapsed portals.
Additionally, a review of an underground high-grade mining option gave resource numbers too low to be of interest to the Company, particularly when having to deal with a large number of historic open stopes.