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Table 1 shows the mining prospects of some mine filling mines and their pillars at home and abroad.
Table 1 Overview of some mine filling mines and their pillars at home and abroad
project name
Tory chrome ore
Jinchuan Nickel Mine
Bo Square copper mine
Fankou lead zinc ore
Huangshaping lead-zinc mine
×× uranium mine
Tonglushan Copper Mine
Tin, antimony ore mine
Tongguanshan Copper Mine
Ore body thickness (m)
6~28
20～70
8.32
20~60
2 to 25
1 to 60
50
3~20
30~80
Ore inclination (°)
40～45
60
20~30
45～70
huge change
75～80
50-70
10-20
46~60
Heading length (m)
50~100
250~300
130
300~800
300
1 to 200
370
2000
320~450
Grade (%)
Cr 2 O 3 36.02
Cu+Ni 3
Cu 5.87
Pb+Zn 16.6
Pb+Zn 6.61
Cu 1.73
Fe 30.7
Sb 3.5～3.8
Ore stability
Æ’=8~10
Not stable enough
Less exposed surface
200m 2
ƒ=4～6
Unstable
ƒ=8～12
stable
ƒ=8～12
stable
ƒ=17～19
stable
ƒ=8～12
stable
stable
stable
Surrounding rock stability
ƒ=4～6
Unstable
Unstable
Æ’=3~7
Unstable
ƒ=6～12
Ibid.
Local instability
ƒ=7～9
Medium stability
Partial instability
ƒ=10～13
stable
Stage height (m)
45~50
Vice stage 30
30
40
30~36
60
Oblique length 40~60
Subsection 20
30
Mine width (m)
5
5
4
7
10~12
15
6-8
5~6
12~14
Stope area (m 2 )
<50～100
100~200
30～70
200~300
200～800
250 to 500
400～800
300
500
Mine recovery plan
Upward horizontal layered filling
Same as left
Same as left
Same as left, retention method, VCR method
Horizontal layered filling
Same as left
Same as the left, the point column filling method
Post-filling
Horizontal layered filling
Filling material
Gobi concrete
Same as left
Concrete
Concrete
Waste rock, cut wall
Same as left
Water quenching slag
Concrete
Waste stone
Filler strength
R 28 (MPa)
1.0 to 2.0
1.0 to 4.0
2.0 to 3.0
1.5 to 4.0
Request 75 #
Pillar width (m)
5
5
4~6
9
7~8
8
8~10
8
6-8
Pillar area (m 2 )
<100
100~200
30~50
300
300～500
500
350~400
Pillar recovery scheme
Horizontal layered filling
Same left and retaining ore filling
Top and bottom horizontal layer filling
Same as left, staying mining method, VCR
Horizontal layered filling
Same as left
Same as left
Post-filling
Sectional collapse
Filling material for pillar
Concrete
Concrete
Concrete
Water (tail) sand
Waste stone
Same as left
Water quenching
Tailings
Pillar filling body strength
R 28 (MPa)
1.0 to 2.0
1.0 to 3.0
2.0 to 3.0
Reason for filling
Scarce chrome ore, depleted hour can be used without beneficiation , requiring less loss of depletion
Rich mine
Copper-rich ore, with complex ore shape and high grade
There are fertile fields on the surface, and the roof is rich in pressurized water and rich in ore.
The ore body changes greatly and the grade is high.
Rare metal, large changes in ore bodies
There is Daye Lake in the mining area, the surface is not allowed to collapse, rich ore
Mining under the riverbed, buildings on the surface, underground barriers to be built
Simultaneous mining in the pit and in the open air
Table 1 Overview of some mine filling mines and their pillars at home and abroad (continued)
project name
Soviet May 1
Canadian Eagle Bridge
Hardy Canada
American Hongman Stoke
Soviet Gaux
Burrenswick, Canada
Japan Ancient Far
Soviet October mine
Ore body thickness (m)
5~30
Up to 36
10.5~60
3 to 70, generally
15~40
20~60
Upper 30~60
15~20
20
Ore inclination (°)
45~60
30~40
30~40
35～40
50～90
75
10~15
Sharp tilt
Heading length (m)
350~400
91～212
400
10000~20000
Grade (%)
Ni1.5 Cu0.8
Cu+Pb+Zn=1.3
Cu+Pb+Zn=7.7
Ore stability
ƒ=10～12, stable
Not very stable
Unstable
stable
ƒ=8～12, stable
stable
Unstable
stable
Surrounding rock stability
ƒ=8～12, stable
Ibid.
Not very stable
Partial instability
Medium stable, partially broken
Ibid.
stable
Stage height (m)
70
38～53
30~37.5
45
45
100~130
10
60
Mine width (m)
30~50
9 to 10
10.3
18
10~12
38
4~5
15~20
Stope area (m 2 )
300～500
400
1000
300~400
Mine recovery plan
Sectional rock drilling stage mining method, post-harvest filling
Upward horizontal layered filling
Same as left
Horizontal layered ore retention, post-harvest filling
Sectional rock drilling stage mining method, post-harvest filling
Horizontal layered filling
Upward horizontal layered filling
Deep hole collapse
Filling material
Wet grinding slag mortar
1:30 cement tail mortar
Low-grade cement mortar
Waste stone tailings
Wet grinding mortar
Waste stone
Tailings
Concrete
Filler strength
R 28 (MPa)
2.0 to 3.0
5.0~6.0, design 10.0
Pillar width (m)
6-8
6.6
7.8
13
10~12
38
2 .5~3.5
15~20
Pillar area (m 2 )
60~100
400
300~400
Pillar recovery scheme
Sectional rock drilling stage mining method, post-harvest filling
Down filling method
Down fill
Box filling, down filling
Sectional rock drilling stage mining method mining post-harvest filling
Deep hole collapse
Down fill
Sectional rock drilling stage mining method, post-harvest filling
Filling material for pillar
Warm sanding mortar
False top 1:5 cement slurry
Water sand clay
Open-air waste rock crushed and cemented
Tail sand filling, cement floor
Concrete concrete filling
Pillar filling body strength
R 28 (MPa)
2.0 to 3.0
False top 4.0
Fake top 40~50
Reason for filling
Leading mining in the poor mine
Simultaneous mining of Ni and Cu rich ore bodies in underground and open air
Rich ore body
Gold mine
Simultaneous mining in underground and open air
Rich mine
Rich ore broken
Rich iron ore, open pit slope protection