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 | ƒ=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 | ƒ=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 |
automotive electrical connectors types ,automotive electrical connectors kit, automotive connectors south africa, automotive connectors types, automotive connectors kit
Taishan Yuanjin Auto Parts CO., LTD , https://www.yuanjinautoparts.com