CN112196538A - Inclined upward mountain combined downward access cemented filling mining method - Google Patents
Inclined upward mountain combined downward access cemented filling mining method Download PDFInfo
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- CN112196538A CN112196538A CN202011305702.2A CN202011305702A CN112196538A CN 112196538 A CN112196538 A CN 112196538A CN 202011305702 A CN202011305702 A CN 202011305702A CN 112196538 A CN112196538 A CN 112196538A
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
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- F42D3/04—Particular applications of blasting techniques for rock blasting
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Abstract
The invention discloses a downward drift consolidated fill mining method combining inclined upward mountain mining and downward drift mining, which comprises the following steps: a. designing a stope, arranging the stope along the trend of an ore body, determining the width of an access according to the thickness of the ore body, and determining the height of the access according to the crushing degree of the ore body; b. a mining and cutting project is prepared; c. controlling a top plate, and carrying out anchor net supporting after obliquely ascending a mountain, drilling a roadway along a vein and entering a road; in the area with serious crushing condition, steel arch frames are adopted for auxiliary support, wherein the exposed area of the opening of the access way and the inclined upward mountain is larger, and the steel arch frames are adopted for intensive support; d. mining and ore removal, wherein after blasting and ventilation, a slag raking machine, an electric tricycle and a scraper are adopted for combined ore removal; e. mechanical equipment layer transfer; f. and (6) cementing and filling. The invention has the characteristics of simple mechanical layer rotation, high safety, high ore removal efficiency and simple construction process, and is particularly suitable for mining of steeply inclined broken thin ore bodies.
Description
Technical Field
The invention relates to the field of open-stoping and subsequent filling mining, in particular to a downward access cemented filling mining method combining inclined upward mining and downward access mining.
Background
When weak crushing and poor stability thin ore body mining is carried out, a downward access filling mining method is generally adopted, and a raise is adopted for accurate mining, so that personnel and equipment can go up and down. With the aging of personnel, the improvement of labor cost and the development of related equipment and technologies, the mechanization degree of the whole stoping process needs to be improved urgently in order to ensure the strength of the stoping and the ore removal efficiency of mines, but the stoping is limited by a raise mining accurate mode, and equipment layer transfer and field transfer have larger problems. How to solve the technical problem existing in the mechanized process of soft-breaking thin vein exploitation is the key for realizing the efficient and safe exploitation of the soft-breaking thin vein. The patent discloses a downward drift consolidated fill mining method is united to upward hill to one side, and upward hill to one side through excavation UNICOM upper and lower middle section changes layer passageway and ore removal passageway as mechanical equipment, satisfies pedestrian, ore removal while, has solved the problem that mechanical equipment changes the layer difficulty.
The invention discloses a method for filling and mining a broken surrounding rock ore body downward access layered non-segmented roadway, which adopts a mining mode without a layered connecting road, a segmented roadway and an extravein slope road, an ore chute and a pedestrian ventilation shaft are arranged outside the vein, and an upper plate and a lower plate of the access are supported by anchor nets.
The invention discloses a downward access layered cemented filling mining method, which is characterized in that the section of an access road of a stope is six-surface-shaped, the arrangement is characterized in that adjacent access roads are staggered by half layers at the vertical height, vein-passing access roads are arranged at two wings of a vertical ore body of the stope, and filling roads and small filling wells are not tunneled.
The invention discloses a Chinese patent with an authorization publication number of CN 104747190B, and discloses a mechanized high-layering continuous mining method for thin ore bodies, which achieves a bottom-drawing layer for layered mining by arranging an annular connection slope way, adopts reinforced concrete to pour an artificial false bottom at the bottom, and forms a complete intra-vein slope way along with the layer-by-layer mining and filling of first-mined ore blocks.
The above-mentioned unfavorable conditions are that we reasonably utilize the tripartite stone on the road of mineral resources, and it is also a trip for the development of mining technology. Therefore, the development of an innovative mining scheme is of great significance to steeply dipping soft-breaking thin veins.
Disclosure of Invention
The invention aims to provide a method for mining by combining inclined upward and downward access cemented filling aiming at the defects of the prior art, and aims to solve the problems of difficult ore discharge, difficult layer transfer and high supporting cost of mechanical equipment in the conventional mining of a steep broken thin ore body.
The invention provides a downward drift consolidated fill mining method combining inclined upward mountains, which comprises the following steps:
a. stope design
Arranging stopes along the trend of the ore body, determining the width of an access road according to the thickness of the ore body, and determining the height of the access road according to the crushing degree of the ore body;
b. mining and cutting project
b1, dividing the stope into middle sections along the vertical height of the ore vein, and reserving a top pillar in each middle section without reserving a bottom pillar;
b2, constructing an upper vein rock drilling roadway in the top vein of the middle section, and constructing a lower vein rock drilling roadway in the bottom vein of the middle section;
b3, constructing and communicating an inclined upward mountain of the upper-edge rock drilling roadway and the lower-edge rock drilling roadway, wherein the inclined upward mountain is used as a channel for ore removal, ventilation, pedestrians and mechanical layer transfer and is inclined upward from one side of the lower-edge rock drilling roadway to the other side of the upper-edge rock drilling roadway;
b4, dividing the middle section into layers along the vertical height of the vein, and constructing an access of each layer obliquely up and down;
b5, arranging a forward filling return air shaft in the approach by adopting a steel plate;
c. roof control
Performing anchor net support after obliquely ascending a mountain, drilling a roadway along a vein and entering a road; in the area with serious crushing condition, steel arch frames are adopted for auxiliary support, wherein the exposed area of the opening of the access way and the inclined upward mountain is larger, and the steel arch frames are adopted for intensive support;
d. stoping and ore removal
After blasting and ventilation, performing combined ore removal by adopting a slag raking machine, an electric tricycle and a scraper;
e. mechanical equipment rotating layer
After the stoping of the approach is finished, tunneling of the approach on the other side of the lower layering is started, after the tunneling length is 8-10 m, the mechanical equipment is turned from an inclined upper hill to a lower layering, and the mechanical equipment is pulled by a hanging rope when the layer is changed due to the steep gradient; f. cemented filling
And after the equipment is transferred to the layer, plugging and filling the access passage layered above by using a filling body.
In the step a, the width of the access road is 2.0-2.5 m, and the height of the access road is 2-2.2 m.
In the step a, the length of a stope is 85-100 m.
In the step b1, the middle section is 40m high, and the top column is 4-6 m high.
In the step b3, the slope angle of the inclined upward hill is 20-30 degrees, the horizontal length of the inclined upward hill is 85-100 m, the vertical length is 40m of the height of the middle section, and the section size is 2.2m wide and 2m high.
In the step c, determining that the anchor rod is a tube seam type anchor rod according to the crushing degree of the ore body and the size of the cross section of the inclined upward mountain, the length of the anchor rod is 1.2-1.5 m, the outer diameter of the anchor rod is phi 45mm, a mesh is a reinforcing mesh with the size of 1.0m multiplied by 2.0m, the mesh size is 100mm multiplied by 100mm, and a hole is drilled by a yt28 type air leg rock drill, and the aperture is phi 40 mm.
And d, conveying slag to an obliquely upward mountain by adopting a slag raking machine and an electric tricycle in the approach and conveying slag in the obliquely upward mountain to a lower-edge-vein rock drilling roadway by adopting a scraper.
In the step f, the concrete construction steps of plugging and filling the access of the upper layering are as follows:
f1, flat field
Leveling an access bottom plate, and paving a broken stone cushion layer with the thickness of 100-200 mm;
f2, spreading film
Paving a plastic film on the gravel cushion;
f3, paving pad
Paving stones or pitted wood on the plastic film to serve as cushion blocks, wherein the height of each cushion block is 100-150 mm;
f4 spreading reinforcing mesh
Laying a reinforcing mesh on the cushion block;
f5, hanging and hanging rib
Manufacturing hanging ribs by using round steel with the diameter of 10mm, wherein the length of the hanging ribs is 0.6-1.0 m, and the row spacing is 0.6-1.0 m; one side of the hanging bar is tied at the bottom anchor rod of the upper disc or the lower disc, and the other side is tied at the junction of the main bar and the auxiliary bar of the bottom reinforcing mesh, the tying mode is that the hanging bar is bent to form a closed loop, and the free end is pulled to sleeve the anchor rod or the bottom reinforcing mesh;
f6, filling tube rack
In a main filling pipeline, a filling connecting roadway and a top pass, a braided tube which is braided by wear-resistant steel and has the inner diameter phi of 100mm is adopted as a filling tube; a polyethylene plastic pipe with the inner diameter phi of 80mm is adopted as a filling pipe in a disposable filling access;
f7 filling retaining wall for erecting closed filling stope
The filling partition wall adopts a wood structure, round wood is used as a stand column, and then the round wood is erected layer by layer according to the filling height; the wood boards and the wood boards are required to be in tight contact with the wall, and linen or geotextile is padded between the wood boards and the wall to prevent cement paste from flowing out and play a role in water filtration;
f8 filling and grouting
River sand, tailings and cement are selected as pulping materials, and the ratio of ash to sand is 1: 4-1: 8, proportioning, and carrying out 2-3 times of grouting filling on the first mining route and filling the top.
In the step f4, the reinforcing mesh is formed by binding main bars and auxiliary bars through 8# steel wires, and the main bars of the reinforcing mesh are phi 12mm thread steel and are arranged along the route; auxiliary bars of the reinforcing mesh are round steel with the diameter of 6mm and are arranged vertically to the approach; the mesh size of the reinforcing mesh at the bottom is 600mm multiplied by 600 mm.
Compared with the prior art, the invention has the following advantages:
(1) the mode of replacing a manway ventilation shaft and a sliding mine by climbing uphill obliquely is adopted, so that the whole mining accuracy engineering quantity is reduced, and the mechanical equipment is convenient to rotate to the layer.
(2) And the mechanized ore removal is adopted to replace the manual ore removal, the length of a stope is greatly improved, the number of times of layer turning of mechanical equipment is reduced, the ore removal efficiency is improved, and the labor cost is reduced.
(3) Because the inclined upward mountains are arranged in the veins, the mechanized ore removal equipment does not need to turn, and slag can be directly transported into the inclined upward mountains, so that the ore removal efficiency is improved.
(4) The inclined upward mountains replace a pedestrian ventilation shaft and a sliding mine, so that the construction difficulty and the supporting difficulty are simplified, and the upper and lower discs and the top plate are supported by the anchor net, so that the safety of pedestrians is ensured.
(5) The upper and lower plates and the top plate are supported according to different conditions, so that the safety of operators is improved.
The invention has the characteristics of simple mechanical layer rotation, high safety, high ore removal efficiency and simple construction process, and is particularly suitable for mining of steeply inclined broken thin ore bodies.
Drawings
Fig. 1 is a schematic structural view of a front view of the present invention.
3 FIG. 3 2 3 is 3 a 3 schematic 3 view 3 of 3 the 3 structure 3 at 3 A 3- 3 A 3 in 3 FIG. 3 1 3. 3
FIG. 3 is a schematic view of the structure at B-B in FIG. 1.
The labels shown in the figures and the corresponding component names are:
1. a top pillar; 2. drilling a roadway along the upper vein; 3. drilling a roadway along the lower edge; 4. obliquely climbing the mountain; 5. entering a road; 6. filling a return air shaft along the way; 7. a filler body; 8. an ore body; 9. and (5) layering.
Detailed Description
As can be seen from fig. 1 to 3, the method for combining upward and oblique mountains and downward access cemented filling mining comprises the following steps:
a. stope design
Arranging a stope along the direction of the ore body 8, wherein the length of the stope is 85-100 m; determining the width of an access road according to the thickness of an ore body, wherein the width of the access road is 2.0-2.5 m generally; determining the height of an approach according to the crushing degree of an ore body, wherein the general height of the approach is 2-2.2 m;
b. mining and cutting project
b1, dividing the stope into middle sections along the vertical height of the ore vein, wherein the height of the middle sections is 40m, and a top pillar 1 with the height of 4-6 m is reserved in each middle section without a bottom pillar;
b2, constructing an upper vein rock drilling roadway 2 in the top vein of the middle section, constructing a lower vein rock drilling roadway 3 in the bottom vein of the middle section, wherein the section sizes of the upper vein rock drilling roadway 2 and the lower vein rock drilling roadway 3 are both 2.2m wide and 2.2m high;
b3, constructing and communicating an inclined upward mountain 4 of the upper vein rock drilling roadway 2 and the lower vein rock drilling roadway 3, wherein the inclined upward mountain is used as a channel for ore removal, ventilation, pedestrians and mechanical layer transfer and is inclined upward from one side of the lower vein rock drilling roadway 3 to the other side of the upper vein rock drilling roadway 2;
b4, dividing the middle section into layers 9 along the vertical height of the vein, constructing an access 5 of each layer 9 obliquely upwards and downwards, wherein the section size of the access 5 is 2.2m wide and 2.2m high;
b5, arranging a forward filling return air shaft 6 in the approach 5 by adopting a steel plate;
c. roof control
After an upper vein rock drilling roadway 2, a lower vein rock drilling roadway 3, an oblique upward mountain 4 and an access road 5 are constructed, anchor net support is carried out, an anchor rod in the anchor net support is determined to be a pipe seam type anchor rod according to the crushing degree of an ore body and the size of the cross section of the oblique upward mountain, the length of the anchor rod is 1.2 m-1.5 m, the outer diameter of the anchor rod is phi 45mm, a mesh in the anchor net support is a reinforcing steel bar net with the size of 1.0m multiplied by 2.0m, the size of the mesh is 100mm multiplied by 100mm, a hole is drilled by a yt28 type pneumatic leg rock drill, and the hole diameter is phi 40 mm;
in the area with serious crushing condition, steel arch frames are adopted for auxiliary support, wherein the exposed area of the opening of the access way and the inclined upward mountain is larger, and the steel arch frames are adopted for intensive support;
d. stoping and ore removal
After blasting and ventilation, a slag raking machine, an electric tricycle and a scraper are adopted for combined ore removal, wherein slag is conveyed into an inclined upward mountain 4 by adopting the slag raking machine and the electric tricycle in an approach 5, and then slag in the inclined upward mountain 4 is conveyed to a lower-edge-vein rock drilling roadway 3 by adopting the scraper;
e. mechanical equipment rotating layer
After the stoping of the access 5 in the upper layer 9 is finished, starting tunneling of the access 5 on the other side of the lower layer 9, after the tunneling length is 8-10 m, turning the mechanical equipment from the inclined upper mountain 4 to the lower layer, and using a hanging rope to pull the mechanical equipment when the mechanical equipment is turned due to the steep gradient;
f. cemented filling
And after the layer transfer of the equipment is finished, plugging and filling the access 5 in the upper layer 9 by using the filling body 7.
In the invention, the slope angle of the obliquely upward hill 4 is 20-30 degrees, the horizontal length of the obliquely upward hill 4 is 85-100 m, the vertical length is 40m of the middle section height, and the section size is 2.2m, the width is x 2m, and the height is 2 m.
In step f of the present invention, the concrete construction steps of using the filling body 7 to block and fill the access 5 in the upper layer 9 are as follows:
f1, flat field
A small amount of crushed ore is left on the bottom plate of the access 5 during ore removal, the bottom plate of the access 5 is leveled, and a crushed stone cushion layer with the thickness of 100-200 mm is laid;
f2, spreading film
Paving a plastic film on the gravel cushion;
f3, paving pad
Paving stones or pitted wood on the plastic film to serve as cushion blocks, wherein the height of each cushion block is 100-150 mm;
f4 spreading reinforcing mesh
Paving a reinforcing mesh on the cushion block, wherein the reinforcing mesh is formed by binding main bars and auxiliary bars through 8# steel wires, and the main bars of the reinforcing mesh are phi 12mm thread steel and are arranged along the route; auxiliary bars of the reinforcing mesh are round steel with the diameter of 6mm and are arranged vertically to the approach; the mesh size of the reinforcing mesh at the bottom is 600mm multiplied by 600 mm;
f5, hanging and hanging rib
Manufacturing hanging ribs by using round steel with the diameter of 10mm, wherein the length of the hanging ribs is 0.6-1.0 m, and the row spacing is 0.6-1.0 m; one side of the hanging bar is tied at the bottom anchor rod of the upper disc or the lower disc, and the other side is tied at the junction of the main bar and the auxiliary bar of the bottom reinforcing mesh, the tying mode is that the hanging bar is bent to form a closed loop, and the free end is pulled to sleeve the anchor rod or the bottom reinforcing mesh;
f6, filling tube rack
In a main filling pipeline, a filling connecting roadway and a top pass, a braided tube which is braided by wear-resistant steel and has the inner diameter phi of 100mm is adopted as a filling tube; a low-cost polyethylene plastic pipe with the inner diameter phi of 80mm is adopted as a filling pipe in a disposable filling access;
f7 filling retaining wall for erecting closed filling stope
The filling partition wall adopts a wood structure, round wood is used as a stand column, and then the round wood is erected layer by layer according to the filling height; the wood boards and the wood boards are required to be in tight contact with the wall, and linen or geotextile is padded between the wood boards and the wall to prevent cement paste from flowing out and play a role in water filtration;
f8 filling and grouting
River sand, tailings and cement are selected as pulping materials, and the ratio of ash to sand is 1: 4-1: 8, proportioning, and carrying out 2-3 times of grouting filling on the first mining access 5 to fill the top of the knot.
Claims (9)
1. A downward drift consolidated fill mining method combining inclined upward mountain mining and downward drift mining is characterized by comprising the following steps:
a. stope design
Stopes are arranged along the trend of the ore body (8), the width of the access road is determined according to the thickness of the ore body, and the height of the access road is determined according to the crushing degree of the ore body;
b. mining and cutting project
b1, dividing the stope into middle sections along the vertical height of the ore vein, and reserving a top pillar (1) in each middle section without reserving a bottom pillar;
b2, constructing an upper vein rock drilling roadway (2) in the vein at the top of the middle section, and constructing a lower vein rock drilling roadway (3) in the vein at the bottom of the middle section;
b3, constructing and communicating an inclined upward mountain (4) of the upper-edge rock drilling roadway and the lower-edge rock drilling roadway, wherein the inclined upward mountain is used as a channel for ore removal, ventilation, pedestrians and mechanical layer transfer and is inclined upward from one side of the lower-edge rock drilling roadway to the other side of the upper-edge rock drilling roadway;
b4, dividing the middle section into layers along the vertical height of the vein, and constructing an access (5) of each layer obliquely upwards and downwards;
b5, arranging a forward filling return air shaft (6) in the approach by adopting a steel plate;
c. roof control
Performing anchor net support after obliquely ascending a mountain, drilling a roadway along a vein and entering a road; in the area with serious crushing condition, steel arch frames are adopted for auxiliary support, wherein the exposed area of the opening of the access way and the inclined upward mountain is larger, and the steel arch frames are adopted for intensive support;
d. stoping and ore removal
After blasting and ventilation, performing combined ore removal by adopting a slag raking machine, an electric tricycle and a scraper;
e. mechanical equipment rotating layer
After the stoping of the approach is finished, tunneling of the approach on the other side of the lower layering is started, after the tunneling length is 8-10 m, the mechanical equipment is turned from an inclined upper hill to a lower layering, and the mechanical equipment is pulled by a hanging rope when the layer is changed due to the steep gradient;
f. cemented filling
After the layer transfer of the equipment is finished, the filling body (7) is used for plugging and filling the access passage layered above.
2. The upward-slope and downward-slope combined downward access cemented filling mining method according to claim 1, characterized in that: in the step a, the width of the access road is 2.0-2.5 m, and the height of the access road is 2-2.2 m.
3. The upward-slope and downward-slope combined downward access cemented filling mining method according to claim 1, characterized in that: in the step a, the length of a stope is 85-100 m.
4. The upward-slope and downward-slope combined downward access cemented filling mining method according to claim 1, characterized in that: in the step b1, the middle section is 40m high, and the top column is 4-6 m high.
5. The upward-slope and downward-slope combined downward access cemented filling mining method according to claim 1, characterized in that: in the step b3, the slope angle of the inclined upward hill is 20-30 degrees, the horizontal length of the inclined upward hill is 85-100 m, the vertical length is 40m of the height of the middle section, and the section size is 2.2m wide and 2m high.
6. The upward-slope and downward-slope combined downward access cemented filling mining method according to claim 1, characterized in that: in the step c, determining that the anchor rod is a tube seam type anchor rod according to the crushing degree of the ore body and the size of the cross section of the inclined upward mountain, the length of the anchor rod is 1.2-1.5 m, the outer diameter of the anchor rod is phi 45mm, a mesh is a reinforcing mesh with the size of 1.0m multiplied by 2.0m, the mesh size is 100mm multiplied by 100mm, and a hole is drilled by a yt28 type air leg rock drill, and the aperture is phi 40 mm.
7. The upward-slope and downward-slope combined downward access cemented filling mining method according to claim 1, characterized in that: and d, conveying slag to an obliquely upward mountain by adopting a slag raking machine and an electric tricycle in the approach and conveying slag in the obliquely upward mountain to a lower-edge-vein rock drilling roadway by adopting a scraper.
8. The method for combined downward access cemented filling mining on inclined mountains according to claim 1, wherein in the step f, the concrete construction steps of plugging and filling the access of the upper layer by using a filling body are as follows:
f1, flat field
Leveling an access bottom plate, and paving a broken stone cushion layer with the thickness of 100-200 mm;
f2, spreading film
Paving a plastic film on the gravel cushion;
f3, paving pad
Paving stones or pitted wood on the plastic film to serve as cushion blocks, wherein the height of each cushion block is 100-150 mm;
f4 spreading reinforcing mesh
Laying a reinforcing mesh on the cushion block;
f5, hanging and hanging rib
Manufacturing hanging ribs by using round steel with the diameter of 10mm, wherein the length of the hanging ribs is 0.6-1.0 m, and the row spacing is 0.6-1.0 m; one side of the hanging bar is tied at the bottom anchor rod of the upper disc or the lower disc, and the other side is tied at the junction of the main bar and the auxiliary bar of the bottom reinforcing mesh, the tying mode is that the hanging bar is bent to form a closed loop, and the free end is pulled to sleeve the anchor rod or the bottom reinforcing mesh;
f6, filling tube rack
In a main filling pipeline, a filling connecting roadway and a top pass, a braided tube which is braided by wear-resistant steel and has the inner diameter phi of 100mm is adopted as a filling tube; a polyethylene plastic pipe with the inner diameter phi of 80mm is adopted as a filling pipe in a disposable filling access;
f7 filling retaining wall for erecting closed filling stope
The filling partition wall adopts a wood structure, round wood is used as a stand column, and then the round wood is erected layer by layer according to the filling height; the wood boards and the wood boards are required to be in tight contact with the wall, and linen or geotextile is padded between the wood boards and the wall to prevent cement paste from flowing out and play a role in water filtration;
f8 filling and grouting
River sand, tailings and cement are selected as pulping materials, and the ratio of ash to sand is 1: 4-1: 8, proportioning, and carrying out 2-3 times of grouting filling on the first mining route and filling the top.
9. The upward-slope combined downward access cemented filling mining method according to claim 8, characterized in that: in the step f4, the reinforcing mesh is formed by binding main bars and auxiliary bars through 8# steel wires, and the main bars of the reinforcing mesh are phi 12mm thread steel and are arranged along the route; auxiliary bars of the reinforcing mesh are round steel with the diameter of 6mm and are arranged vertically to the approach; the mesh size of the reinforcing mesh at the bottom is 600mm multiplied by 600 mm.
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| CN104747190A (en) * | 2015-04-02 | 2015-07-01 | 广西大学 | Thin ore-body mechanized highly-layering continuous mining method |
| CN108252718A (en) * | 2018-02-01 | 2018-07-06 | 长沙有色冶金设计研究院有限公司 | Suitable for the surface mining method of slight slope and thin ore body |
| CN108661647A (en) * | 2018-04-20 | 2018-10-16 | 贵州开磷集团股份有限公司 | A kind of mining methods for implementing to exploit filling in gently inclined orebody arteries and veins using ramp |
| CN108894785A (en) * | 2018-06-12 | 2018-11-27 | 北京矿冶科技集团有限公司 | A kind of layer and section combination recovery method of breaking ore body interlayer |
| CN110284884A (en) * | 2019-05-28 | 2019-09-27 | 西北矿冶研究院 | Mining method of gentle dip-dip medium-thickness ore body |
| CN110905516A (en) * | 2019-11-29 | 2020-03-24 | 金川集团股份有限公司 | High-sublevel cut-and-fill mining method with downward layered horizontal access |
| CN111255459A (en) * | 2020-02-25 | 2020-06-09 | 长沙矿山研究院有限责任公司 | Combined downward mechanized filling mining method for steeply inclined extremely-broken ore vein |
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