Difference between revisions of "Pillar design"

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|-
 
|-
 
| Sill Pillar
 
| Sill Pillar
| Horizontal pillars that separate levels or stopes,
+
| Horizontal pillars that separate levels or stopes, often used when multiple levels are mined concurrently.
often used when multiple levels are
 
mined concurrently.
 
 
|-
 
|-
 
|Room and Pillars
 
|Room and Pillars
|Pillars are left in place in a predetermined
+
|Pillars are left in place in a predetermined and calculated pattern as rooms are mined out.
and calculated pattern as rooms are mined out.
 
 
|-
 
|-
 
|Yield Pillars
 
|Yield Pillars
|Pillars are designed to fail by going past
 
  +
|Pillars are designed to fail by going past peak load carrying capacity. Roof-strata is maintained by relieving pressure in working areas and controlling transference of load to abutments that are clear of working areas and road ways.Yielded pillars still carry load.
peak load carrying capacity. Roof-strata is
 
maintained by relieving pressure in working
 
areas and controlling transference of load
 
to abutments that are clear of working areas
 
and road ways. Yielded pillars still carry load.
 
 
|-
 
|-
 
|Post Pillars
 
|Post Pillars
|Room and pillar variation where ore is mined
+
|Room and pillar variation where ore is mined out in a series of horizontal slices.
out in a series of horizontal slices.
 
 
|-
 
|-
 
|Barrier Pillars
 
|Barrier Pillars
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|-
 
|-
 
|Bracket Pillars
 
|Bracket Pillars
|Slip on discontinuities may cause rockburst
 
  +
|Slip on discontinuities may cause rockburst within stopes, which can cause equipment damageand injury or loss of life. Ore immediately adjacent to these geological structures is left unmined to protect the structure from mining induced stresses.
within stopes, which can cause equipment damage
 
and injury or loss of life. Ore immediately
 
adjacent to these geological structures is
 
left unmined to protect the structure from
 
mining induced stresses.
 
 
|}
 
|}
   

Revision as of 14:32, 4 February 2015

1.0 Classification of Pillars

1.1 Support Pillars

Support pillars are load carrying. Examples of support pillars include:

Type of Pillar Description
Sill Pillar Horizontal pillars that separate levels or stopes, often used when multiple levels are mined concurrently.
Room and Pillars Pillars are left in place in a predetermined and calculated pattern as rooms are mined out.
Yield Pillars Pillars are designed to fail by going past peak load carrying capacity. Roof-strata is maintained by relieving pressure in working areas and controlling transference of load to abutments that are clear of working areas and road ways.Yielded pillars still carry load.
Post Pillars Room and pillar variation where ore is mined out in a series of horizontal slices.
Barrier Pillars Solid blocks left between two mines or sections

of a mine. Provides regional support in large mines to prevent accidents due to inrushes of water, gas, or explosions or a mine fire.

Bracket Pillars Slip on discontinuities may cause rockburst within stopes, which can cause equipment damageand injury or loss of life. Ore immediately adjacent to these geological structures is left unmined to protect the structure from mining induced stresses.


Please add a link to this page in the article that already exists on room and pillar mining.