NASC 130 Essentials3_ch12

Sequence coal shallow marine coastal fluvial and

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Unformatted text preview: 12: Riches in Rock: Energy & Mineral Resources Coal Mining Huge coal reserves have been discovered Mining type depends on the depth of the coal seam Within 100 m, coal is strip mined For deeper coal seams, underground mining is required For Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Coal Mining Strip mining – landscape destroyed to reach coal Strip A large drag-line bucket is used to scrape off overburden Spoil is stockpiled nearby for later use during reclamation Exposed coal is removed and the excavation is reclaimed Excavation is backfilled with spoil and soil, then planted Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Coal Mining Underground mining – coal removed by tunneling For coal deeper than 100 m, shafts are advanced to seam For Tunnels excavated along the seam remove the coal Coal mining is specialized, expensive and dangerous Tunnels can collapse Methane gas Asphyxiation Explosions Black lung disease Black Major GHG (green Major house gas) contribution house to global warming to (aka, climate change) (aka, Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Nuclear Power Energy from breaking apart atomic nuclei Energy Neutrons strike the fuel and start fission Neutrons Fission splits a large nucleus into smaller fragments Nuclear reactors are contained in...
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