ENV100Y5 Lecture Notes - Lecture 52: Coal Dust, Placer Mining, Sulfur
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ENV100Y5 Full Course Notes
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Document Summary
Mining is an important industry both globally and for canada. Much of canada"s economic history has been based on extractive (i. e. mining, oil drilling, and forestry) industries. Many towns exist mainly because of their mining history. 20% of value of exported goods from canada. The non-fuel mining industry, together with processors and manufacturers of products, provided roughly 380,000 jobs in canada in 2015 + another 200,000 indirect jobs. The type of mine depends on what you are mining and what type of deposit it is (the geology of the deposit) Subsurface mining takes place in underground tunnels and shafts. Deepest mines extend to 4 km depth. Gold, zinc, lead, nickel, tin, diamonds, phosphate, salt, coal, uranium, many others. Dynamite blasts, collapsed tunnels, toxic fumes, coal dust. Subsurface mines can affect people years after they close. Acid drainage, polluted groundwater, sinkholes damage roads and homes, etc. Mining buildings at the surface, but the main workings are underground.
