Table 1 also shows how these areas carry high grade over thicknesses in excess of the minimum mining width
defined in the Beta Hunt Mine Preliminary Economic Assessment (PEA) Technical Report dated March 4, 2016.
The mining width
in the setup notch was enlarged by 6 in.
44g/t of three platinum group metals (platinum, palladium, rhodium plus gold) over a mining width
of 87 cm: a healthy but medium-sized claim.
Restrictions with the creeping cone arise, however, with the minimum mining width
necessary to maintain a breaking face in longhole stoping and to allow compacted ore to run down the cone.
Detailed sampling and re-mapping will determine more precise contacts between ore and waste, leading to a re-assessment of mining width
A minimum mining width
has been set at 3 m so that all mining can be fully mechanized, safe and efficient.
The average J-M Reef mining width
is approximately 3.
3)Indicated resources diluted and factored to minimum mining width
If the mechanized jumbo drills and LHDs require more operating room, the minimum horizontal mining width
for mechanized equipment will become 10 ft, and slusher mining will be used in areas of less than 10 ft horizontal width.
Veins are diluted, at actual grade, to a minimum mining width
for reserves and resources.
Key assumptions included an average mining width
Consequently, optimization of the entire value chain was a complex problem, according to Whittle, which examined the influence of product logistics costs on the operation, balance between ore to be exported and ore smelted, potential to vary the mining width
affecting tonnage and grade available to be mined, and the ability of the orebody to support different sizes of operation in the future.