I just viewed the images of the Azurite mine. 3-4 months to "production"? If what I viewed, burnt shoring, decayed timber, flooded tunnels, common sense should dictate at least 3-4 months to remove all the debris.
Don't know the name of the Mine Safety regulators that would "approve" any operation to clean up what I viewed, but I should think that approval process might take YEARS! Then, maybe re shoring, dewatering etc could start. Recovering/mining new material, 5-6 years beyond!
I prolly missed many requirements, but my thoughts aren't to far off?