mineral development division - rehabilitation projects · ned voky cim 2009 poster author:...
TRANSCRIPT
Figure 2: La Manche Mine Workings Longitudinal section (from map of the La Manche Mining company)
Figure 1: Plan view of La Manche Vein(from map of the La Manche Mining Company)
( Placentia Bay)
La Manche Cove
Natural Resources
MINERAL DEVELOPMENT DIVISION -REHABILITATION PROJECTS
LA MANCHE MINE, PLACENTIA BAY
VISUAL OBSERVATION SUBSIDENCE
AT THE FORMER TERRA NOVA MINE
View of the surface deformation and depression
The area enclosed by the dotted line indicates the geometry of depression The area enclosed by the dotted line
indicates the geometry of depression
Deformation of unconsolidated material occurring above old workings at Terra Nova Mine
Deformation of unconsolidated material occurring above old workings at Terra Nova Mine
1.24 m 1.24 m
1.66 m 1.66 m
4.17 m4.17 m
2.77 m2.77 m
Excavator removing grass from area of the observation
1.66 m1.66 m
1.24 m
1.24 m
View of the signs posted around affected area.
Excavator removing materials above the surface depression.
7.90 m7.90 m
4.25 m
4.25 m
View of the sink hole above depression
4.57 m4.57 m
Removed top soil and grass were restored
View of the site after rehabilitation completed
The area enclosed by the yellow dotted line indicates investigation site.
The area enclosed by the yellow dotted line indicates investigation site.
1.65 m1.65 m
View of Hunt shaft before rehabilitation
14.25 m 14.25 m
depth 5.80 m depth 5.80 m
Deformation of unconsolidated material
above Hunt shaft
Deformation of unconsolidated material
above Hunt shaft
View of Hunt shaft after rehabilitation
height of pile 2.85 m
height of pile 2.85 m
View of excavated ditch around Hunt shaft.
the brook flow direction
the brook flow direction
Hunt shaftHunt shaft
the brook flow direction
the brook flow direction
View of Cohu shaft before and after rehabilitation
8.15 m
8.15 m
depth 4.34 m depth 4.34 m
height of pile 2.15 m
height of pile 2.15 m
16.36 m 16.36 m
Deformation of unconsolidated materail
above Cohu shaft
Deformation of unconsolidated materail
above Cohu shaft
View of McConachie shaft before and after rehabilitation
depth 1.34 m depth 1.34 m 3.54 m
3.54 m
height of pile 3.85 m
height of pile 3.85 m
View of Cooper shaft and surface pillar collapsed before andafter rehabilitation
height of pile 2.37 m
height of pile 2.37 m
5.50 m
5.50 m
depth 21.0 m depth 21.0 m
25.0 m 25.0 m
View of M&H shaft after rehabilitation
2.48 m2.48 m
Barricaded access road to the McConachie, Cooper and M&H shafts before and after.
Access road to the McConache, Cooper and M&H shafts
before it was barricaded
Access road to the McConache, Cooper and M&H shafts
before it was barricaded
Cooper shaft Cooper shaft
Barricaded access roadBarricaded access road
2.35 m 2.35 m
Signs posted around backfilled sitesSigns posted around backfilled sites
View of Hunt shaft before rehabilitation View of Cohu shaft before and after rehabilitation View of McConachie shaft before and after rehabilitation