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Why are mine portals dangerous if left abandoned?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
What is a gob pile?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
What are hazardous water bodies at an abandoned mine site usually associated with?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
In what type of mine would a underground fire be most likely?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
What pH value would be closest to acid mine drainage?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
Which of the following is an example of subsidence?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
What is a mine portal?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
How should a vertical shaft be treated after a mine is abandoned?
entrance to a drift mine or other mine tunnel
covered or barricaded
subsurface coal mine
waste removed from underground (subsurface) mine
people, especially children, might be tempted to explore inside
caving in of the ground over an abandoned coal mine
4.5
dangerous highwalls
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