Underground mining Flashcards
1
Q
hanging wall
A
ore haning above your head
2
Q
footwall
A
ore under your feet
3
Q
surface mining: adv
A
- lower operating capital costs
- safe and higher quality environment
4
Q
Surface mining: dis adv
A
- large amount of surface disturbance
- environmental impact oftern large and visable
5
Q
Stope
A
zone in which ore is removed
6
Q
mining cycle
A
drill holes > charge with load > blast> wait for noxious fumes>muck broken rock>make new part of tunnerl
7
Q
3 basic stoping methods: room and pillar
A
- naturally supported
- don’t have to blask rock
- road header creates tunnel (long arm with small rotating barrel at end)
8
Q
Stoping methods: sublevel and longhole stoping
A
- naturally supported
- longer diameter blast holes
- cut and fill
- shrinkage stoping
- VCR stoping
- longwall mining
- coal longwall
9
Q
stoping method: unsupported
A
- sublevel caving
- block caving
