I know a few of you were interested in seeing some underground mine footage:
I uploaded a video that i took with one of my drones underground. If you were to stack the CN Tower (In Toronto Ont. Canada) on top of itself 4 times
(2212 meters) This video is shot deeper underground than that.
Its nothing too exciting. I was inspecting an open stope to see if there were breakthrough holes, from the access on the opposite side. Think of a big
room with a hallway on either side.
The idea is that the rooms "ceiling" or what we call a "Back" in mining terms, is drilled off from the level above. The ceiling contains the ore. We
blast the ceiling in the room, from the level above. The ore falls and fills the room and becomes loose chunks. Then scoop trams will drive through
the "hallways" or Drifts in mining terms, on either side to safely retrieve the ore.
The scoop trucks are remotely operated from a safe distance back - 1.5 m X the height of the brow. Our drifts are 5m wide X 5m high. So our safe limit
line and remote stand are 7.5 meters back from the brow.
Once the operator retrieves a scoop of ore, it gets loaded into the haul truck, then taken to the underground crusher.
It gets crushed once, then sent on a skip (elevator) up to surface and dumped into the back of another haul truck.
That haul truck will then drive to our Primary crusher and either stock pile the ore there or direct dump.
The ore gets crushed again down to 6 -8 inch rocks, then sent out on a large conveyor belt. The conveyor belt comes out over top of whats called a
Grizzly. The grizzly funnels the ore down back to another conveyor that is also underground, but only about 20 meters deep.
That conveyor crushes the ore again and feeds into the mill.
After being crushed down to a pulp, it gets put through the milling process and mixed with chemicals that bond to the ore, and all the waste goes out
to a tailings pond.
The ore now becomes a concentrate that we send to a smelter in Sudbury Ontario Canada, or if they are full it gets sent by ship to Finland.
That in a nut shell is how we mine!
And heres the video i forgot to link!
edit on 20-6-2016 by Macenroe82 because: (no reason given)