CN108222940A - A kind of recovery method of manganese ore - Google Patents
A kind of recovery method of manganese ore Download PDFInfo
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- CN108222940A CN108222940A CN201810137723.4A CN201810137723A CN108222940A CN 108222940 A CN108222940 A CN 108222940A CN 201810137723 A CN201810137723 A CN 201810137723A CN 108222940 A CN108222940 A CN 108222940A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 20
- 239000011572 manganese Substances 0.000 title claims abstract description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 39
- 239000011707 mineral Substances 0.000 claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000009423 ventilation Methods 0.000 claims abstract description 15
- 238000005065 mining Methods 0.000 claims abstract description 14
- 239000010981 turquoise Substances 0.000 claims abstract description 10
- 239000011435 rock Substances 0.000 claims description 12
- 238000004880 explosion Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims 1
- 230000032258 transport Effects 0.000 claims 1
- 239000012895 dilution Substances 0.000 abstract description 5
- 238000010790 dilution Methods 0.000 abstract description 5
- 210000000481 breast Anatomy 0.000 description 12
- 230000011218 segmentation Effects 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a kind of recovery methods of manganese ore, are related to mining technique field.The method includes arrangement of mining area, adopt accurate and cutting and back production step；The arrangement of mining area is to divide several exploiting fields along orebody trend, divides 37 nuggets in each exploiting field, then nugget is divided into mineral building and ore pillar, and ore body is divided into stage casing in short transverse, subdivided segments in each stage casing；The back production is to be layered progress from bottom to top from mineral building bottom, and layer height is 2 3m, carries out ore caving, ventilation, local ore drawing, flat field and turquoise processing in each layering respectively.The present invention can not only back production lean ore body, can also the thick and extremely thick ore body of back production, applied widely, ore recovery rate 79%, the rate of dilution 12% reduces ore loss ratio.
Description
【Technical field】
The present invention relates to mining technique fields, and in particular to a kind of recovery method of manganese ore.
【Background technology】
Manganese ore is one of valuable source of steel-making, is the grand strategy resource of Chinese national economy construction, but China's manganese ore
The amount of storage of resource is not enriched, and ore body is based on thin layer, mostly low-angle dip, and the scattered distribution of mining site is disorder, can exploit
Be also mostly lean ore, be not rich ore, exploitation utilization rate is 60% or so, and very low, wastage is big, therefore, the exploitation of China's manganese ore
There are many problems.The recovery method of manganese ore has open-stope method, filling method and Caving Method with Large Space at present.Open-stope method is China's underground mining
The widely used method of Manganese Mine has 9 mines using open-stope method in 15 mines of statistics, accounts for 60%, open-stope method
According to orebody occurrence difference, breast stoping, room and pillar stoping and shrinkage stoping is respectively adopted.Caving Method with Large Space includes wall type
Caved stopes, scramming and sublevel caving.Filling method includes hydraulic filling mining codes and Nitrate uptake
Mining codes.These mining methods are more single, and ore loss ratio is high.
【Invention content】
In view of the above-mentioned problems, the present invention provides a kind of recovery method of manganese ore, this method can not only back production lean ore body, also
Can the thick and extremely thick ore body of back production, reduce ore loss ratio, it is applied widely.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
A kind of recovery method of manganese ore, includes the following steps：
(1) arrangement of mining area：Several exploiting fields are divided along orebody trend, divide 3-7 nugget in each exploiting field, then by nugget
It is divided into mineral building and ore pillar, and ore body is divided into stage casing in short transverse, subdivided segments in each stage casing；The miding level height
40-60m, height of lift 15-20m；The long 40-60m of the nugget, width 30-60m；The long 20-30m of the mineral building, width 10-20m；
(2) accurate and cutting is adopted：Adopt accurate and cutting include setting adopt quasi- courtyard, connection roadway, haulage drift, scraper tunnel,
Scraper winch chamber and funnel；It is described to adopt quasi- courtyard and be arranged in studding, dig the connection roadway towards exploiting field, institute every 4-6m
The section for stating connection roadway is 2.0 × 1.5 ㎡；The scraper tunnel is arranged on the length direction along mineral building, above haulage drift
At 3-4m, the cutting specification in the scraper tunnel is 2.0 × 2.0 ㎡；The scraper winch chamber is arranged on the scraper tunnel
Side, a length of 3-4m, width 3-5m, a height of 2-4m of scraper winch chamber；In the scraper tunnel of scraper winch chamber side
The section of one connection haulage way of pick, for placing ore deposit The Small Well；Funnel is opened in foundation, spacing 5-7m；
(3) back production：It is layered progress, layer height 2-3m, respectively in each layering from bottom to top from mineral building bottom
Carry out ore caving, ventilation, local ore drawing, flat field and turquoise processing；Stope uses bench, ladder length 10-15m, with chisel
Rock machine is dug in bench to borehole, on lean forward 750-850 to borehole, the borehole is arranged in parallel in linear type, the borehole
Aperture be 70-80mm, array pitch 1.0-1.5m, bottom hole pitch 1.5-1.6m；After borehole is dug, the powder charge in borehole is risen with non-electrical
Quick-fried system carries out explosion；With the main fan of ventilating system and auxiliary fan exhaust ventilation after ore avalanche, then the ore deposit in funnel is released
30-40% is transported；Mineral building top plate and upper lower burrs rock are checked after ore drawing immediately, and handles float stone, smooth location treats mineral building back production
During to fore-set, that is, carry out a large amount of uniform ore drawings.
Further, the ore pillar is rectangular, and length is 3-4m, and ore pillar spacing is 5-10m.
Further, the specification for adopting quasi- courtyard is 1.5-2.0 × 2.0-2.5 ㎡.
Further, the cross-sectional area of the haulage way is 2.0 × 2.0 ㎡.
Further, the rock drill is pusher leg drill or drill jumbo.
Further, the non-electric initiation system is non-electrical elementary errors detonator or initiator.
Compared with prior art, the present invention has the advantages that：
The present invention is divided into stage casing and segmentation by the way that exploiting field is divided into nugget, mineral building and ore pillar in short transverse, returns
It is layered progress when adopting from bottom to top from mineral building bottom, and carries out in each layering ore caving, ventilation, local ore drawing, flat respectively
And turquoise processing, can not only back production lean ore body, can also back production it is thick and extremely thickness ore body, it is applied widely, ore recovery rate >=
70%, the rate of dilution≤18% reduces ore loss ratio.
【Specific embodiment】
The specific embodiment of the present invention is described further with reference to embodiments.
Embodiment 1
A kind of recovery method of manganese ore of the present embodiment, includes the following steps：
(1) arrangement of mining area：Several exploiting fields are divided along orebody trend, 7 nuggets are divided in each exploiting field, then nugget is drawn
Into mineral building and ore pillar, and ore body is divided into stage casing in short transverse, subdivided segments in each stage casing；The miding level height 60m,
Height of lift 20m；The long 60m of the nugget, width 60m；The long 30m of the mineral building, width 20m；The ore pillar is rectangular, and length is equal
For 4m, ore pillar spacing is 10m.
(2) accurate and cutting is adopted：Adopt accurate and cutting include setting adopt quasi- courtyard, connection roadway, haulage drift, scraper tunnel,
Scraper winch chamber and funnel；Described to adopt quasi- courtyard and be arranged in studding, the specification for adopting quasi- courtyard is 2.0 × 2.5 ㎡；Often
The connection roadway towards exploiting field is dug every 6m, the section of the connection roadway is 2.0 × 1.5 ㎡；The scraper tunnel is arranged on
Above along the length direction of mineral building, haulage drift at 4m, the cutting specification in the scraper tunnel is 2.0 × 2.0 ㎡；The scraper
Big section is arranged on the side in the scraper tunnel, a length of 4m, width 5m, a height of 4m of scraper winch chamber；Scraper winch
The section of one connection haulage way of pick in the scraper tunnel of chamber side, the cross-sectional area of the haulage way is 2.0 × 2.0
㎡, for placing ore deposit The Small Well；Funnel is opened in foundation, spacing 7m.
(3) back production：Be layered progress from bottom to top from mineral building bottom, layer height 3m, respectively in each layering into
Row ore caving, ventilation, local ore drawing, flat field and turquoise processing；Stope uses bench, and ladder length 15m uses drill jumbo
To borehole on chisel in bench, on to borehole lean forward 850, the borehole is arranged in parallel in linear type, and the aperture of the borehole is
80mm, array pitch 1.5m, bottom hole pitch 1.6m；After borehole is dug, the powder charge in borehole carries out explosion with initiator；After ore avalanche
With the main fan of ventilating system and auxiliary fan exhaust ventilation, the ore deposit in funnel is then released 40% and is transported；Ore deposit is checked after ore drawing immediately
Shingle and upper lower burrs rock, and float stone is handled, smooth location when mineral building back production to fore-set, that is, carries out a large amount of uniform ore drawings.
The present embodiment is divided into stage casing and segmentation by the way that exploiting field is divided into nugget, mineral building and ore pillar in short transverse,
Be layered progress during back production from bottom to top from mineral building bottom, and carry out in each layering respectively ore caving, ventilation, local ore drawing,
Flat field and turquoise processing, can not only back production lean ore body, can also back production it is thick and extremely thickness ore body, applied widely, ore recovery rate
73%, the rate of dilution 15% reduces ore loss ratio.
Embodiment 2
A kind of recovery method of manganese ore of the present embodiment, includes the following steps：
(1) arrangement of mining area：Several exploiting fields are divided along orebody trend, 3 nuggets are divided in each exploiting field, then nugget is drawn
Into mineral building and ore pillar, and ore body is divided into stage casing in short transverse, subdivided segments in each stage casing；The miding level height 40m,
Height of lift 15m；The long 40m of the nugget, width 30m；The long 20m of the mineral building, width 10m；The ore pillar is rectangular, and length is equal
For 3m, ore pillar spacing is 5m.
(2) accurate and cutting is adopted：Adopt accurate and cutting include setting adopt quasi- courtyard, connection roadway, haulage drift, scraper tunnel,
Scraper winch chamber and funnel；Described to adopt quasi- courtyard and be arranged in studding, the specification for adopting quasi- courtyard is 1.5 × 2.0 ㎡；Often
The connection roadway towards exploiting field is dug every 4m, the section of the connection roadway is 2.0 × 1.5 ㎡；The scraper tunnel is arranged on
Above along the length direction of mineral building, haulage drift at 3m, the cutting specification in the scraper tunnel is 2.0 × 2.0 ㎡；The scraper
Big section is arranged on the side in the scraper tunnel, a length of 3m, width 3m, a height of 2m of scraper winch chamber；Scraper winch
The section of one connection haulage way of pick in the scraper tunnel of chamber side, the cross-sectional area of the haulage way is 2.0 × 2.0
㎡, for placing ore deposit The Small Well；Funnel is opened in foundation, spacing 5m.
(3) back production：Be layered progress from bottom to top from mineral building bottom, layer height 2m, respectively in each layering into
Row ore caving, ventilation, local ore drawing, flat field and turquoise processing；Stope uses bench, and ladder length 10m is dug with gas leg type
Rock machine is dug in bench to borehole, on to borehole lean forward 750, the borehole is arranged in parallel in linear type, the hole of the borehole
Diameter is 70mm, array pitch 1.0m, bottom hole pitch 1.5m；After borehole is dug, the powder charge in borehole carries out explosion with non-electrical elementary errors detonator；
With the main fan of ventilating system and auxiliary fan exhaust ventilation after ore avalanche, the ore deposit in funnel is then released 30% and is transported；After ore drawing
Mineral building top plate and upper lower burrs rock are checked immediately, and handles float stone, and smooth location when mineral building back production to fore-set, that is, carries out big
Measure uniform ore drawing.
The present embodiment is divided into stage casing and segmentation by the way that exploiting field is divided into nugget, mineral building and ore pillar in short transverse,
Be layered progress during back production from bottom to top from mineral building bottom, and carry out in each layering respectively ore caving, ventilation, local ore drawing,
Flat field and turquoise processing, can not only back production lean ore body, can also back production it is thick and extremely thickness ore body, applied widely, ore recovery rate
70%, the rate of dilution 18% reduces ore loss ratio.
Embodiment 3
A kind of recovery method of manganese ore of the present embodiment, includes the following steps：
(1) arrangement of mining area：Several exploiting fields are divided along orebody trend, 5 nuggets are divided in each exploiting field, then nugget is drawn
Into mineral building and ore pillar, and ore body is divided into stage casing in short transverse, subdivided segments in each stage casing；The miding level height 50m,
Height of lift 18m；The long 50m of the nugget, width 50m；The long 25m of the mineral building, width 15m；The ore pillar is rectangular, and length is equal
For 3.5m, ore pillar spacing is 7m.
(2) accurate and cutting is adopted：Adopt accurate and cutting include setting adopt quasi- courtyard, connection roadway, haulage drift, scraper tunnel,
Scraper winch chamber and funnel；Described to adopt quasi- courtyard and be arranged in studding, the specification for adopting quasi- courtyard is 1.8 × 2.3 ㎡；Often
The connection roadway towards exploiting field is dug every 5m, the section of the connection roadway is 2.0 × 1.5 ㎡；The scraper tunnel is arranged on
Above along the length direction of mineral building, haulage drift at 3.5m, the cutting specification in the scraper tunnel is 2.0 × 2.0 ㎡；The electricity
Rake big section is arranged on the side in the scraper tunnel, a length of 3-4m, width 3-5m, a height of 2-4m of scraper winch chamber；
The section of one connection haulage way of pick, the cross-sectional area of the haulage way are in the scraper tunnel of scraper winch chamber side
2.0 × 2.0 ㎡, for placing ore deposit The Small Well；Funnel is opened in foundation, spacing 6m.
(3) back production：It is layered progress, layer height 2.5m, respectively in each layering from bottom to top from mineral building bottom
Carry out ore caving, ventilation, local ore drawing, flat field and turquoise processing；Stope uses bench, and ladder length 12m uses gas leg type
Rock drill is dug in bench to borehole, on to borehole lean forward 800, the borehole is arranged in parallel in linear type, the borehole
Aperture is 75mm, array pitch 1.3m, bottom hole pitch 1.55m；After borehole is dug, the powder charge in borehole carries out explosion with initiator；Ore
With the main fan of ventilating system and auxiliary fan exhaust ventilation after avalanche, the ore deposit in funnel is then released 35% and is transported；After ore drawing immediately
It checks mineral building top plate and upper lower burrs rock, and handles float stone, smooth location when mineral building back production to fore-set, that is, carries out a large amount of equal
Even ore drawing.
The present embodiment is divided into stage casing and segmentation by the way that exploiting field is divided into nugget, mineral building and ore pillar in short transverse,
Be layered progress during back production from bottom to top from mineral building bottom, and carry out in each layering respectively ore caving, ventilation, local ore drawing,
Flat field and turquoise processing, can not only back production lean ore body, can also back production it is thick and extremely thickness ore body, applied widely, ore recovery rate
79%, the rate of dilution 12% reduces ore loss ratio.
Above description is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
Bright patent claim, the equal variation or modification change completed under the technical spirit suggested by all present invention, should all belong to
Cover the scope of the claims in the present invention.
Claims (6)
1. a kind of recovery method of manganese ore, it is characterised in that：Include the following steps：
(1) arrangement of mining area：Several exploiting fields are divided along orebody trend, 3-7 nugget is divided, then nugget is divided into each exploiting field
Mineral building and ore pillar, and ore body is divided into stage casing in short transverse, subdivided segments in each stage casing；The miding level height 40-
60m, height of lift 15-20m；The long 40-60m of the nugget, width 30-60m；The long 20-30m of the mineral building, width 10-20m；
(2) accurate and cutting is adopted：It adopts standard and cutting includes setting and adopts quasi- courtyard, connection roadway, haulage drift, scraper tunnel, scraper
Big section and funnel；It is described to adopt quasi- courtyard and be arranged in studding, the connection roadway towards exploiting field is dug every 4-6m, it is described
The section in network tunnel is 2.0 × 1.5 ㎡；The scraper tunnel is arranged on the length direction along mineral building, 3-4m above haulage drift
Place, the cutting specification in the scraper tunnel is 2.0 × 2.0 ㎡；The scraper winch chamber is arranged on the one of the scraper tunnel
Side, a length of 3-4m, width 3-5m, a height of 2-4m of scraper winch chamber；One is dug in the scraper tunnel of scraper winch chamber side
The section of haulage way is connected, for placing ore deposit The Small Well；Funnel is opened in foundation, spacing 5-7m；
(3) back production：It is layered progress from bottom to top from mineral building bottom, layer height 2-3m is carried out in each layering respectively
Ore caving, ventilation, local ore drawing, flat field and turquoise processing；Stope uses bench, and ladder length 10-15m uses rock drill
To borehole on chisel in bench, on lean forward 750-850 to borehole, the borehole is arranged in parallel in linear type, the hole of the borehole
Diameter is 70-80mm, array pitch 1.0-1.5m, bottom hole pitch 1.5-1.6m；After borehole is dug, the powder charge in borehole, with non-electric initiation system
System carries out explosion；With the main fan of ventilating system and auxiliary fan exhaust ventilation after ore avalanche, the ore deposit in funnel is then released into 30-
40% transports；Mineral building top plate and upper lower burrs rock are checked after ore drawing immediately, and handles float stone, smooth location treats mineral building back production extremely
During fore-set, that is, carry out a large amount of uniform ore drawings.
2. a kind of recovery method of manganese ore according to claim 1, it is characterised in that：The ore pillar to be rectangular, length and width,
Height is 3-4m, and ore pillar spacing is 5-10m.
3. a kind of recovery method of manganese ore according to claim 1, it is characterised in that：It is described adopt quasi- courtyard specification be
1.5-2.0×2.0-2.5㎡。
4. a kind of recovery method of manganese ore according to claim 1, it is characterised in that：The cross-sectional area of the haulage way
For 2.0 × 2.0 ㎡.
5. a kind of recovery method of manganese ore according to claim 1, it is characterised in that：The rock drill is gas leg type rock drilling
Machine or drill jumbo.
6. a kind of recovery method of manganese ore according to claim 1, it is characterised in that：The non-electric initiation system is non-electrical
Elementary errors detonator or initiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137723.4A CN108222940A (en) | 2018-02-10 | 2018-02-10 | A kind of recovery method of manganese ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137723.4A CN108222940A (en) | 2018-02-10 | 2018-02-10 | A kind of recovery method of manganese ore |
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| Publication Number | Publication Date |
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| CN108222940A true CN108222940A (en) | 2018-06-29 |
Family
ID=62661505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810137723.4A Pending CN108222940A (en) | 2018-02-10 | 2018-02-10 | A kind of recovery method of manganese ore |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979304A (en) * | 2019-04-28 | 2019-07-05 | 湖南科技大学 | A kind of integrated teaching mould of more recovery methods and simulation mining method |
| CN111101943A (en) * | 2019-11-07 | 2020-05-05 | 中拓均安(北京)矿山技术有限公司 | Method for mining manganese ore |
| CN111550244A (en) * | 2020-05-11 | 2020-08-18 | 武汉理工大学 | Mining method for layered strips of gently inclined ore body |
| CN111706328A (en) * | 2020-07-29 | 2020-09-25 | 中钢集团马鞍山矿山研究总院股份有限公司 | Mining method for treating goaf left-over studs by filling method |
| CN111828007A (en) * | 2020-07-29 | 2020-10-27 | 中钢集团马鞍山矿山研究总院股份有限公司 | Stoping method for residual studs in underground mine goaf |
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| US3902422A (en) * | 1973-07-26 | 1975-09-02 | Du Pont | Explosive fracturing of deep rock |
| CN203452793U (en) * | 2013-07-10 | 2014-02-26 | 济南钢城矿业有限公司 | Room structure of shallow-hole shrinkage mining method for mining near-surface thick, large and more oblique ore body |
| CN105422101A (en) * | 2015-12-10 | 2016-03-23 | 贵州晨辉达矿业工程设计有限公司 | Synchronous mining shrinkage stoping method for double-layer mine variety inclined ore body |
| CN105649630A (en) * | 2016-01-22 | 2016-06-08 | 沈阳金丰石化物资贸易有限公司 | Mining technology for gold ore |
| CN106194188A (en) * | 2016-07-21 | 2016-12-07 | 广西大学 | The quick-fried power of scraper collaborative carrying puppet tilts room and pillar stoping |
| CN106499395A (en) * | 2016-12-05 | 2017-03-15 | 广西大学 | The quick-fried power scraper of shallow bore hole rock drilling cooperates with haulage Sublevel room mining |
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| US3902422A (en) * | 1973-07-26 | 1975-09-02 | Du Pont | Explosive fracturing of deep rock |
| CN203452793U (en) * | 2013-07-10 | 2014-02-26 | 济南钢城矿业有限公司 | Room structure of shallow-hole shrinkage mining method for mining near-surface thick, large and more oblique ore body |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979304A (en) * | 2019-04-28 | 2019-07-05 | 湖南科技大学 | A kind of integrated teaching mould of more recovery methods and simulation mining method |
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| CN111101943A (en) * | 2019-11-07 | 2020-05-05 | 中拓均安(北京)矿山技术有限公司 | Method for mining manganese ore |
| CN111550244A (en) * | 2020-05-11 | 2020-08-18 | 武汉理工大学 | Mining method for layered strips of gently inclined ore body |
| CN111550244B (en) * | 2020-05-11 | 2021-03-23 | 武汉理工大学 | Mining method for layered strips of gently inclined ore body |
| CN111706328A (en) * | 2020-07-29 | 2020-09-25 | 中钢集团马鞍山矿山研究总院股份有限公司 | Mining method for treating goaf left-over studs by filling method |
| CN111828007A (en) * | 2020-07-29 | 2020-10-27 | 中钢集团马鞍山矿山研究总院股份有限公司 | Stoping method for residual studs in underground mine goaf |
| CN111828007B (en) * | 2020-07-29 | 2022-08-16 | 中钢集团马鞍山矿山研究总院股份有限公司 | Stoping method for residual studs in underground mine goaf |
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