WO2019051569A1 - Method for underground mining of minerals - Google Patents
Method for underground mining of minerals Download PDFInfo
- Publication number
- WO2019051569A1 WO2019051569A1 PCT/BG2018/000035 BG2018000035W WO2019051569A1 WO 2019051569 A1 WO2019051569 A1 WO 2019051569A1 BG 2018000035 W BG2018000035 W BG 2018000035W WO 2019051569 A1 WO2019051569 A1 WO 2019051569A1
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- WIPO (PCT)
- Prior art keywords
- mining
- level
- stope
- rise
- block
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Definitions
- the method is designed for underground mining of minerals from shaft pillars, combined mining and mining under engineering facilities such as roads, railroads, river beds, etc.
- a method for underground mining of minerals is known according to an article "Effective system for development of the reserves in the pillar of Varba shaft, Gorubso- Madan JSC" with authors Assoc. Prof. Dr. D. Anastasov et al., published in the Mining and Geology magazine by the Bulgarian Chamber of Mining and Geology, issue 6- 7/1999.
- the ore extraction is performed from a mining block with the respective length, width and height.
- the development works are done which include driving a haulage level on a rock, under and sideways to the mining block. Then a stope rise and a crosscut tunnel are driven from the haulage level to the i
- the next step is the driving of an accumulating cut connecting the stope rise and; the crosscut tunnel.
- the cutting works are done which include driving of cut-off entries on a rock and short rises on ores. These rises have two departments - manhole ventilation and ore chute.
- the extraction works are carried out bottom-up through the cut-off entries, the drilling and blasting works are done in the mining block and the extracted ore is transported to the short rise, and from the ore chute it iis sent to the respective cut-off entry and along it, the ore is hauled to the stope rise and afterwards it is lowered to the accumulating cut.
- the mined out space is filled in with rock waste and cement milk or hydraulic fill.
- the problem to be solved by the present invention is to provide rapid and qualitative performance of underground mineral extraction under complex mining and civil engineering facilities, as well as in shaft pillars, without allowing any deformation in them.
- a method of underground mining of minerals including the driving of a haulage level on a rock, under and sideways to a mining block, as well as a ventilation level, located above the haulage level and the mining block.
- a central stope rise and a second stope rise are driven along the height H of the extraction block and the ventilation level is driven from the beginning of the mining block to an imaginary transverse plane defined by the second stope rise.
- an upper incline is driven externally to the mining block from the beginning of the ventilation level downwards and a lower incline - at the beginning of the haulage level upwards.
- the two inclines have routes which are joined in an imaginary transverse plane defined by the second stope rise.
- the upper incline is advanced over the lower incline.
- Another variant of the method is also envisaged, in which the driving of the haulage level, the ventilation level and the two inclines is carried out simultaneously.
- the joining level of the two inclines - upper and lower is approximately half the height H of the mining block.
- the advantages of the method of this invention consist in the ability to carry out underground mining under difficult conditions because of the presence of engineering facilities : and other structures built on the surface of the terrain or immediately below it, whose integrity is completely preserved. This is due to the separation of the mining block in height in two parts, making a reinforced concrete pillar. Basically, this provides for working on four stopes in the mining block.
- Fig. 1 is
- Fig. 2 is a view along A-A of Fig. 1.
- the method for underground extraction of minerals is carried out for the removal of minerals from a pre-established mining block 1, defined along the length L, height H and width B.
- This mining block 1 is located under engineering or other facilities which should be preserved undisturbed, or represents a shaft pillar, or there is a combined way of mining.
- the method consists in separating the mining block 1 into an upper la and a lower part lb by building a reinforced concrete pillar 2 and includes driving a haulage level 3 on a rock under and sideways to the mining block 1, as well as a ventilation level 4, located above the haulage level 3 and above the extraction block 1.
- a central stope rise 5 and a second stope rise 6 are driven along the height H of the mining block 1 and the ventilation level 4 is driven from the beginning In of the extraction block 1 to an imaginary transverse plane 7 defined by the second stope rise 6.
- an upper incline 8 is driven from the beginning of the ventilation level 4 downwards.
- the lower incline 9 is driven externally to the mining block 1 from the beginning of the haulage level 3 upwards.
- the two inclines 8, 9 have routes which are joined in the imaginary transverse plane 7 defined by the second stope rise 6.
- an upper sill cut 11 is made at the joining level of the two
- the reinforced concrete pillar 2 is poured out in sections to fill the entire length of the upper sill cut 11.
- development workings are driven, which involves driving a haulage level 3 on a rock, beneath the mining block 1 and laterally thereto, as well as a ventilation level 4 situated above the haulage level 3 and above the height of the mining block 1.
- a central stope rise 5 and a second stope rise 6 are driven along the entire height H of the mining block 1.
- the second stope rise 6 is driven at the end lk of the mining block 1 or at a location where the mining works will be carried out.
- the ventilation level 4 is driven from the beginning In of the mining block 1 to an imaginary transverse plane 7 defined by the second stope rise 6.
- the mining block 1 it is possible to have mining workings already carried out if the mining block 1 is a continuation of an already working mine and developed reserves. It is also possible to apply the method to deposits in depth, where, according to the conditions, an initial stope risje 12 is also risen.
- an initial stope risje 12 is also risen.
- Two incljnes 8, 9 are driven externally to the mining block 1, one of which is a upward incline, called lower incline 9, and it is passed from the beginning of the haulage level 3 to the imaginary transverse plane 7 defined by the stope rise 6.
- the other is a downward incline, called upper incline 8, and it is driven from the ventilation level 4 to the imaginary transverse plane 7 defined by the stope rise 6.
- the routes of the two inclines ⁇ , 9 are joined together in the imaginary transverse plane 7 defined by the stope rise 6 and beyond.
- the joining point of the upper 8 and the lower 9 inclines is typically ⁇ approximately half the height H of the mining block 1.
- the slope of the upper 8 and lower 9 inclines is determined by the requirements of the type of equipment intended for use in underground works.
- An example of a suitable slope using a medium dimension equipment is a gradient of 8-10%, which does not restrict the application of the method as long as it is within the knowledge of the average specialist to determine it according to the particular conditions and guidelines in the reference literature.
- the upper incline 8 is advanced over the lower incline 9.
- the driving of the haulage level 3, the ventilation level 4 and the two inclines 8, 9 is carried out simultaneously.
- the choice of variant depends on the size of the mining block 1 and the particular mining and geological conditions.
- an upper sill cut 11 is made at the level of joining the two inclines 8, 9, i.e. approximately half of the height H of the mining block 1.
- a lower sill cut 13 is also done at haulage level 3.
- the upper sill cut 11 is driven in the direction of the second stope rise 6 to the beginning In of the mining block 1 when the ore is removed from the mining block 1. After driving the upper sill cut 11 in the direction from the beginning In of the mining block 1 jto the second stope rise 6, gradually, in sections, the reinforced concrete reinforced concrete pillar 2 is poured to fill the entire length of the upper sill cut 11.
- the reinforced concrete pillar 2 includes steel rods and cement filling.
- the transportation of the materials to the filling sections is done by means of a pulp pipe 15 installed in the central sto e rise 5.
- the first and subsequent cut-off entries 10 are driven gradually in the lower part lb of the mining block 1 of the haulage level 3 to reach the ore body.
- the steps are in the order of driving the lower incline 9 to the respective slices.
- a loading cut-off entry 16 is also driven to the second stope rise 6 through which the blasted ore is loaded through the central stope rise 5.
- the underground mining itself is carried out through drilling and blasting operations, usually carried out by a drill carriage 17 and mechanised loading of the blast holes.
- the supply of the extracted ore from the bottom lb of the extraction block 1 is usually carried out by a front-end loader to an underground motor dumper (not shown).
- the supply of the ore extracted from the upper part la of the mining block 1 is done by a front-end loader 18 to the central stope rise 5, which is used as an ore chute.
- rock mass mainly from the driven development workings and cement solution, resulting in a rock-cement filling (rubble concrete).
- rock-cement filling rubber concrete
- This method of filling is suitable for carrying out at the bottom of the mining block 1. It is also possible to use another deposited rock material.
- the method is designed for the extraction of ore under existing engineering or civil engineering facilities. It can also be used for mining out of shaft pillars. These applications do not limit the use of the method to the specified conditions. It can also be carried out under conditions that are not restricted by the availability of facilities to be preserved. Its application is suitable for mining operations, which aim at accelerating the extraction process, since the separation of the extraction block 1 into an upper la and a lower part lb by the reinforced concrete pillar 2, allows the mining works to! be carried out on two and / or four stopes.
Abstract
The method is applicable in difficult mining conditions such as shaft pillars, combined mining and mining under engineering facilities. It comprises driving a haulage level (3) on a rock, under and sideways to a mining block (1); driving a ventilation level located above the haulage level (3) and over the mining block, where a central stope rise (5) and a second stope rise (6) are risen along the height H of the mining block. The ventilation level (4) is driven from the beginning (1n) of the mining block (1) to an imaginary transverse plane (7) defined by the second stope rise (6). Externally to the mining block is driven an upper incline (8) from the beginning of the ventilation level (4) downward and a lower incline (9) - from the beginning of the haulage level (3) upwards. The routes of the inclines (8, 9) are joined in the imaginary transverse plane (7) on the level approximately half the height H. After driving the upper incline (8) through the cut-off entry into the mining block (1), an upper sill cut (11) is made at the same level. After that, in the direction from the beginning (In) of the mining block to the second stope rise (6) a reinforced concrete pillar (2) is poured into sections to fill the entire length of the upper sill cut (11). It divides the mining block (1) into two parts - upper and lower - and conventional mining operations are carried out.
Description
METHOD FOR UNDERGROUND MINING OF MINERALS
TECHNICAL FIELD
The method is designed for underground mining of minerals from shaft pillars, combined mining and mining under engineering facilities such as roads, railroads, river beds, etc.
BACKGROUND OF THE ART
A method for underground mining of minerals is known according to an article "Effective system for development of the reserves in the pillar of Varba shaft, Gorubso- Madan JSC" with authors Assoc. Prof. Dr. D. Anastasov et al., published in the Mining and Geology magazine by the Bulgarian Chamber of Mining and Geology, issue 6- 7/1999. In this method the ore extraction is performed from a mining block with the respective length, width and height. In the beginning the development works are done which include driving a haulage level on a rock, under and sideways to the mining block. Then a stope rise and a crosscut tunnel are driven from the haulage level to the i
mining block. The next step is the driving of an accumulating cut connecting the stope rise and; the crosscut tunnel. Afterwards the cutting works are done which include driving of cut-off entries on a rock and short rises on ores. These rises have two departments - manhole ventilation and ore chute. The extraction works are carried out bottom-up through the cut-off entries, the drilling and blasting works are done in the mining block and the extracted ore is transported to the short rise, and from the ore chute it iis sent to the respective cut-off entry and along it, the ore is hauled to the stope rise and afterwards it is lowered to the accumulating cut. After the extraction of the minerals from the respective layer of the mining block, the mined out space is filled in with rock waste and cement milk or hydraulic fill.
The drawbacks of this known method consist in the inability to use it in tightened conditions such as the presence of engineering infrastructure on the surface or in case when the mining block is part of the shaft pillar because the integrity of the facility will
be broken and hence, the shaft. Thus, the method employs considerable preparatory works which delay the development.
SUMMARY OF THE INVENTION
The problem to be solved by the present invention is to provide rapid and qualitative performance of underground mineral extraction under complex mining and civil engineering facilities, as well as in shaft pillars, without allowing any deformation in them.
The problem is solved by a method of underground mining of minerals, including the driving of a haulage level on a rock, under and sideways to a mining block, as well as a ventilation level, located above the haulage level and the mining block. According to the invention, a central stope rise and a second stope rise are driven along the height H of the extraction block and the ventilation level is driven from the beginning of the mining block to an imaginary transverse plane defined by the second stope rise. In addition, an upper incline is driven externally to the mining block from the beginning of the ventilation level downwards and a lower incline - at the beginning of the haulage level upwards. The two inclines have routes which are joined in an imaginary transverse plane defined by the second stope rise. After the driving of the upper incline, through a cut-off entry in the mining block from the second stope rise, an upper sill cut is done at the level of the joining of the two inclines in the direction of the i
second stope rise at the beginning of the mining block during the ore mining. After performing the upper sill cut, in the direction of the beginning of the mining block to the second stope rise, a reinforced concrete pillar is poured out in sections till the whole length of the upper sill cut is filled. The lower sill cut is made at the haulage level and the usual mining works are performed in the mining block which is divided into two parts, upper and lower, by the reinforced concrete pillar.
In one variant of the method, the upper incline is advanced over the lower incline.
In another variant of the method the upper and lower inclines are driven simultaneously.
Another variant of the method is also envisaged, in which the driving of the haulage level, the ventilation level and the two inclines is carried out simultaneously.
i
The joining level of the two inclines - upper and lower, is approximately half the height H of the mining block.
The advantages of the method of this invention consist in the ability to carry out underground mining under difficult conditions because of the presence of engineering facilities: and other structures built on the surface of the terrain or immediately below it, whose integrity is completely preserved. This is due to the separation of the mining block in height in two parts, making a reinforced concrete pillar. Basically, this provides for working on four stopes in the mining block. The driving of two inclines - upper and i
lower, which are coupled in the stope rise, greatly accelerates the extraction processes. Conditions are also created for the use of the rock mass, which has been mined out during the development workings, for a filling material for the spaces cleared by the minerals.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is |a vertical section through a ore body/mining block for underground mining; Fig. 2 is a view along A-A of Fig. 1.
EXAMPLES OF EMBODIMENTS OF THE INVENTION
ί
The method for underground extraction of minerals is carried out for the removal of minerals from a pre-established mining block 1, defined along the length L, height H and width B. This mining block 1 is located under engineering or other facilities which should be preserved undisturbed, or represents a shaft pillar, or there is a combined way of mining.
The method consists in separating the mining block 1 into an upper la and a lower part lb by building a reinforced concrete pillar 2 and includes driving a haulage level 3 on a rock under and sideways to the mining block 1, as well as a ventilation level 4, located above the haulage level 3 and above the extraction block 1. According to the invention, a central stope rise 5 and a second stope rise 6 are driven along the height H of the mining block 1 and the ventilation level 4 is driven from the beginning In of the extraction block 1 to an imaginary transverse plane 7 defined by the second stope rise 6. Externally to the mining block 1, an upper incline 8 is driven from the beginning of the ventilation level 4 downwards. The lower incline 9 is driven externally to the mining block 1 from the beginning of the haulage level 3 upwards. The two inclines 8, 9 have routes which are joined in the imaginary transverse plane 7 defined by the second stope rise 6. After driving the upper incline 8, through the cut-off entry 10, in the mining
i
block 1 of the second stope rise 6, an upper sill cut 11 is made at the joining level of
the two |inclines in the direction of the second stope rise 6 to the beginning In of the mining block 1 when mining out the ore. After it has been done, from the beginning In of the mining block 1 to the second stope rise 6, the reinforced concrete pillar 2 is poured out in sections to fill the entire length of the upper sill cut 11. There is also a lower sil cut 13 at haulage level 3 and usual mining works are carried out in the mining block 1 divided into two parts by the reinforced concrete pillar 2.
The method is illustrated in more detail in the accompanying figures, as follows:
Initially, development workings are driven, which involves driving a haulage level 3 on a rock, beneath the mining block 1 and laterally thereto, as well as a ventilation level 4 situated above the haulage level 3 and above the height of the mining block 1. Next, a central stope rise 5 and a second stope rise 6 are driven along the entire height H of the mining block 1. The second stope rise 6 is driven at the end lk of the mining block 1 or at a location where the mining works will be carried out. The ventilation level 4 is driven from the beginning In of the mining block 1 to an imaginary transverse plane 7 defined by the second stope rise 6. At the beginning In of the mining block 1 it is possible to have mining workings already carried out if the mining block 1 is a continuation of an already working mine and developed reserves. It is also possible to apply the method to deposits in depth, where, according to the conditions, an initial stope risje 12 is also risen. At the same time, when driving the haulage level 3, there is also a cut-off entry to the ore chute 14.
Two incljnes 8, 9 are driven externally to the mining block 1, one of which is a upward incline, called lower incline 9, and it is passed from the beginning of the haulage level 3 to the imaginary transverse plane 7 defined by the stope rise 6. The other is a downward incline, called upper incline 8, and it is driven from the ventilation level 4 to the imaginary transverse plane 7 defined by the stope rise 6. The routes of the two inclines β, 9 are joined together in the imaginary transverse plane 7 defined by the stope rise 6 and beyond. The joining point of the upper 8 and the lower 9 inclines is typically ^approximately half the height H of the mining block 1. The slope of the upper 8 and lower 9 inclines is determined by the requirements of the type of equipment intended for use in underground works. An example of a suitable slope using a medium dimension equipment is a gradient of 8-10%, which does not restrict the application of the method as long as it is within the knowledge of the average specialist to determine it according to the particular conditions and guidelines in the reference literature.
According to a preferred variant of the invention, the upper incline 8 is advanced over the lower incline 9.
A variant is possible when the upper 8 and lower 9 inclines are driven simultaneously.
According to another variant of the method, the driving of the haulage level 3, the ventilation level 4 and the two inclines 8, 9 is carried out simultaneously.
The choice of variant depends on the size of the mining block 1 and the particular mining and geological conditions.
After drii/ing the upper incline 8, through the cut-off entry 10, in the mining block 1 of i
the second stope rise 6, an upper sill cut 11 is made at the level of joining the two inclines 8, 9, i.e. approximately half of the height H of the mining block 1.
A lower sill cut 13 is also done at haulage level 3.
The upper sill cut 11 is driven in the direction of the second stope rise 6 to the beginning In of the mining block 1 when the ore is removed from the mining block 1. After driving the upper sill cut 11 in the direction from the beginning In of the mining block 1 jto the second stope rise 6, gradually, in sections, the reinforced concrete reinforced concrete pillar 2 is poured to fill the entire length of the upper sill cut 11.
The reinforced concrete pillar 2 includes steel rods and cement filling. The transportation of the materials to the filling sections is done by means of a pulp pipe 15 installed in the central sto e rise 5.
reinforced concrete pillar 2.
After casting the reinforced concrete pillar 2, conventional mining operations are carried out in the two parts of the mining block divided by it - upper la and lower lb. In more detail, the mining is carried out in the following manner:
By heading the lower incline 9, the first and subsequent cut-off entries 10 are driven gradually in the lower part lb of the mining block 1 of the haulage level 3 to reach the ore body. The steps are in the order of driving the lower incline 9 to the respective slices. A loading cut-off entry 16 is also driven to the second stope rise 6 through which the blasted ore is loaded through the central stope rise 5.
The underground mining itself is carried out through drilling and blasting operations, usually carried out by a drill carriage 17 and mechanised loading of the blast holes. The supply of the extracted ore from the bottom lb of the extraction block 1 is usually carried out by a front-end loader to an underground motor dumper (not shown).
The supply of the ore extracted from the upper part la of the mining block 1 is done by a front-end loader 18 to the central stope rise 5, which is used as an ore chute.
The use of the particular drilling and transport means exemplified herein is not obligatory in the use of the method according to the invention. They may be other means, !suitable for the specific working conditions, which can be selected for the particular project according to the knowledge of the respective specialist in the field.
Simultaneously with the underground mining, the space released by the ore is filled with rock mass, mainly from the driven development workings and cement solution, resulting in a rock-cement filling (rubble concrete). This method of filling is suitable for carrying out at the bottom of the mining block 1. It is also possible to use another deposited rock material.
When filling the space emptied by the extracted ore at the top of the mining block 1, it is suitable the filling rock mass to pass through a rock compartment of the central i
stope rise 5.
APPLICATION OF THE INVENTION
It is necessary to use underground mobile machinery for the application of the method i
according to the invention - drill carriage 17, front-end loader 18, underground motor dumper, wagons and trolleys for transport of the extracted ore.
The method is designed for the extraction of ore under existing engineering or civil engineering facilities. It can also be used for mining out of shaft pillars. These applications do not limit the use of the method to the specified conditions. It can also be carried out under conditions that are not restricted by the availability of facilities to be preserved. Its application is suitable for mining operations, which aim at accelerating the extraction process, since the separation of the extraction block 1 into an upper la and a lower part lb by the reinforced concrete pillar 2, allows the mining works to! be carried out on two and / or four stopes.
Claims
1. A method for underground mining of minerals, comprising driving a haulage level on a rock, under and sideways to a mining block, as well as a ventilation level located above the haulage level and over the mining block, characterised by a central stope rise (5) and a second stope rise (6) which are risen along the height H of the mining block (1) and the ventilation level (4) is driven from the beginning (In) of the mining block (1) to an imaginary transverse plane (7) defined by the second stope rise (6), externally to the mining block (1) is driven an upper incline (8) from the beginning of the ventilation level (4) downward and a lower incline (9) - from the beginning of the haulage level (3) upwards, and the two inclines (8, 9) have routes which are joined in the imaginary transverse plane (7) defined by the second stope rise (6), and after driving the upper incline (8) through the cut-off entry (10) into the mining block (1) of the second stope rise (6), an upper sill cut (11) is made at the level of joining point of the two inclines (8,9) in the direction of the second stope rise (6) at the beginning (In) of the mining block (1), during the ore extraction, and after its mining, in the direction from the beginning (In) of the mining block (1) to the second stope rise (6) a reinforced concrete pillar (2) is poured into sections to fill the entire length of! the upper sill cut (11), a lower sill cut (13) is made at the haulage level (3) and conventional mining operations are carried out in the mining block (1) divided by i
the reinforced concrete pillar (2) into two parts - upper (la) and lower (lb).
2. A method according to claim 1, characterised by the fact that the upper incline (8) is advanced over the lower incline (9).
3. A method according to claim 1, characterised by the fact that the upper (8) and the lower (9) inclines are driven simultaneously.
4. A method according to claim 1, characterised by the fact that the driving of the haulage level (3), the ventilation level (4) and the two inclines (8, 9) is carried out simultaneously.
5. Ajmethod according to any of the claims 1 to 4, characterised by the fact that the level of joining of both the upper (8) and the lower (9) inclines is approximately half the height H of the mining block (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BG112575 | 2017-09-12 | ||
| BG112575A BG67116B1 (en) | 2017-09-12 | 2017-09-12 | Method of underground mining of mineral resources |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019051569A1 true WO2019051569A1 (en) | 2019-03-21 |
Family
ID=65722246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BG2018/000035 WO2019051569A1 (en) | 2017-09-12 | 2018-09-11 | Method for underground mining of minerals |
Country Status (2)
| Country | Link |
|---|---|
| BG (1) | BG67116B1 (en) |
| WO (1) | WO2019051569A1 (en) |
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| CN110145311A (en) * | 2019-05-28 | 2019-08-20 | 贵州开磷有限责任公司 | Thick or thick phosphorus ore body underground mining method in a kind of low-angle dip |
| CN112360463A (en) * | 2021-01-13 | 2021-02-12 | 矿冶科技集团有限公司 | Mechanical mining method for thick and large ore body development machine |
| CN112943249A (en) * | 2021-03-18 | 2021-06-11 | 福建兴万祥建设集团有限公司 | Low-dilution high-efficiency mining method for ore body at deep side of gold copper ore |
| CN114033481A (en) * | 2021-11-09 | 2022-02-11 | 中煤科工开采研究院有限公司 | Filling method of high-water material slurry in small coal pillar gob hidden chamber |
| CN114278368A (en) * | 2022-01-07 | 2022-04-05 | 安徽铜冠（庐江）矿业有限公司 | Filling protective layer based on steel fiber concrete and construction method |
| CN114396280A (en) * | 2022-01-27 | 2022-04-26 | 中钢集团马鞍山矿山研究总院股份有限公司 | Underground structure arrangement mode for mining by adopting segmented open stope method and staged open stope method in sequence |
| CN114396281A (en) * | 2022-01-27 | 2022-04-26 | 中钢集团马鞍山矿山研究总院股份有限公司 | Underground mine combined mining method |
| CN115263312A (en) * | 2022-09-27 | 2022-11-01 | 北京科技大学 | Mining method for multi-fault-breaking near-horizontal extremely-thin ore body |
| CN115324581A (en) * | 2022-07-06 | 2022-11-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Mining method for high-stress medium-thickness crushed ore body |
| CN115324580A (en) * | 2022-07-06 | 2022-11-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Method for preventing ore depletion in upward drift fill mining |
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| CN110145311A (en) * | 2019-05-28 | 2019-08-20 | 贵州开磷有限责任公司 | Thick or thick phosphorus ore body underground mining method in a kind of low-angle dip |
| CN110145311B (en) * | 2019-05-28 | 2021-05-18 | 贵州开磷有限责任公司 | Underground mining method for gentle-inclination medium-thickness or thick phosphate ore body |
| CN112360463A (en) * | 2021-01-13 | 2021-02-12 | 矿冶科技集团有限公司 | Mechanical mining method for thick and large ore body development machine |
| CN112943249A (en) * | 2021-03-18 | 2021-06-11 | 福建兴万祥建设集团有限公司 | Low-dilution high-efficiency mining method for ore body at deep side of gold copper ore |
| CN114033481A (en) * | 2021-11-09 | 2022-02-11 | 中煤科工开采研究院有限公司 | Filling method of high-water material slurry in small coal pillar gob hidden chamber |
| CN114278368A (en) * | 2022-01-07 | 2022-04-05 | 安徽铜冠（庐江）矿业有限公司 | Filling protective layer based on steel fiber concrete and construction method |
| CN114396280A (en) * | 2022-01-27 | 2022-04-26 | 中钢集团马鞍山矿山研究总院股份有限公司 | Underground structure arrangement mode for mining by adopting segmented open stope method and staged open stope method in sequence |
| CN114396281A (en) * | 2022-01-27 | 2022-04-26 | 中钢集团马鞍山矿山研究总院股份有限公司 | Underground mine combined mining method |
| CN114396280B (en) * | 2022-01-27 | 2022-10-28 | 中钢集团马鞍山矿山研究总院股份有限公司 | Underground structure arrangement mode for mining by adopting segmented open stope method and staged open stope method in sequence |
| CN114396281B (en) * | 2022-01-27 | 2022-10-28 | 中钢集团马鞍山矿山研究总院股份有限公司 | Underground mine combined mining method |
| CN115324581A (en) * | 2022-07-06 | 2022-11-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Mining method for high-stress medium-thickness crushed ore body |
| CN115324580A (en) * | 2022-07-06 | 2022-11-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Method for preventing ore depletion in upward drift fill mining |
| CN115263312A (en) * | 2022-09-27 | 2022-11-01 | 北京科技大学 | Mining method for multi-fault-breaking near-horizontal extremely-thin ore body |
Also Published As
| Publication number | Publication date |
|---|---|
| BG67116B1 (en) | 2020-07-31 |
| BG112575A (en) | 2019-03-29 |
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