CN109751050A - The continuous stratification method of mining by the way of filling is inlayed without muscle to bumps under one kind - Google Patents
The continuous stratification method of mining by the way of filling is inlayed without muscle to bumps under one kind Download PDFInfo
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Abstract
The present invention relates to inlay the continuous stratification method of mining by the way of filling without muscle to bumps under one kind, comprising the following steps: (1) is the stage by ore body division, the stage is divided into multilayer middle section in the height direction；(2) a step stope is arranged in mineral building, arranges that two step stopes, every 5 ~ 7 pillars of a house stopes constitute a panel in ore pillar；(3) Barebone is adopted using the outer trackless of arteries and veins, ore is transported to panel drop shaft by turning layer connecting taxiway under the center route in each middle section and the adopting of upper and lower part both wings ore body, completes ore drawing in stope process；(4) stope in each layer middle section is made of center route, first layer and the second layering, completes the actual mining of each layer ore body of a step stope of panel mineral building, under the lateral protection of a step stope filling body, two step stopes of back production Panel barrier.Have panel stope production capacity big using the method for mining by the way of filling of the present invention, mining time is short, and stoping safety is high, and resources loss is small, adopts and fills process cycles and take over rationally equal remarkable advantages.
Description
Technical field
The breaking ore body that the present invention relates to a kind of for ore-rock pole built on the sand, the grade of ore is high, economic value is big is low safely
Poor loss stoping method, and in particular to inlay the continuous stratification method of mining by the way of filling without muscle to bumps under a kind of.
Background technique
In the ore body that grade is high, economic value is big, especially ore-rock pole built on the sand, the extremely broken production technique item of ore body
Under part, how to realize that safe and efficient, the low poor damage exploitation of ore body is world's mining technique problem.On the one hand, such ore body
Economic value it is big, the loss late and the rate of dilution that mining methods are unreasonable to be will result directly in mining mineral resource process are big, make
At the profligacy of mineral resources；On the other hand, ore-rock is extremely broken, and traditional method not can guarantee between each charge stratifying
It is effective cementing, slicing and filling body intensity is unable to meet production requirement.Meanwhile stope ground pressure is difficult to be controlled effectively, and adopts
Field roof control is difficult, fills top plate large area inbreak problem frequent occurrence in exploitation process, brings to mining safety production
Major safety risks.
According to existing literature statistics, back production for such ore body is domestic mainly to use horizontal cut and fill stoping, water
Flat stratified filling method 52%, remaining is mainly route method and the room-and-pillar method for constructing artificial ore pillar；External this kind of ore body is then main
Filling method (Cut and Fill Mining) is cut using adopting, in addition ratio uses square-set method up to 75%
(Square-set Mining) accounts for 10%；Remaining mainly uses the small-scale shrinkage method in part and natural caving method back production.
Summary of the invention
In view of this, stoping safety is high, under resources loss is small the object of the present invention is to provide a kind of mining time is short
The continuous stratification method of mining by the way of filling is inlayed without muscle to bumps.
The present invention is realized using following scheme: the continuous stratification method of mining by the way of filling is inlayed without muscle to bumps under a kind of, including with
Lower step: (1) ore body is in vertical direction divided into stage, reserves oblique top column, a stage between neighbouring two stages
A reserved oblique top column is undertaken, the safety coal extraction of stage ore body is completed under the protection of oblique top column, the stage draws in the height direction
It is divided into multilayer middle section；(2) it is spaced apart mineral building and ore pillar by divided stages along orebody trend, a step is arranged in mineral building
Stope arranges that two step stopes, every 5 ~ 7 pillars of a house stopes constitute a panel in ore pillar；(3) quasi- system is adopted using the outer trackless of arteries and veins
System, including level haulage tunnel and turn layer connecting taxiway outside level haulageway, panel drop shaft, arteries and veins；The center route in each middle section and
Ore is transported to panel drop shaft by turning layer connecting taxiway under the adopting of upper and lower part both wings ore body, completes ore drawing in stope process；(4) each
The stope in layer middle section is made of center route, first layer and the second layering, is first passed through and is turned layer connecting taxiway completion center route
Back production, using tailing-filled after the route ore removal of center；(5) after the admission passage filling of center, scene carry out to turn layer into
The actual mining of row first layer, with center route do not connect route top both wings ore body centered on top part continue back production from
By space, back production is completed in the form that route expands side and is formed lower to convex back production section, after stope mining, is filled out using tailings
Fill to be formed it is lower to convex obturation；(6) second layering in middle section by lower under the protection of convex obturation, passing through connection center
The layer connecting taxiway that turn of route carries out lower to turning layer, expands the form back production that side bears down on one with route and is formed to spill back production section, out
Filling counterfort and drainage layer are constructed after mine, using tailing-filled stope and are connect in the formation of top to spill obturation；(7) it completes
The actual mining of each layer ore body of a step stope of panel mineral building, under the lateral protection of a step stope filling body, back production disk
Two step stopes of area's ore pillar.
Further, in step (1), stage high 60m, oblique top column 5 ~ 10m of thickness, the high 10 ~ 15m in middle section；In step (2), mine
Wide 8 ~ the 12m in room, the wide 10 ~ 15m of ore pillar.
Further, in step (4), center drift stoping control is risen as 6 ~ 7m, back production 3 ~ 4m of breadth, center route ore removal
After using 1:4 ~ 1:8 proportion tailing-filled 3 ~ 3.5m.
Further, in step (5), back production height is 3 ~ 3.5m, after stope mining, first matches tail with 1:4 ~ 1:8
Then 2 ~ 2.5m of sandfilling continues consolidated fill stope with the proportion tailings of 1:8 ~ 1:20 and connects to fill under top is formed to convex
Body.
Further, in step (6), on to the height of spill back production section be 3 ~ 3.5m, maximum control heights of roofs be 6 ~ 7m,
Tailing-filled process is first to match tailing-filled 2 ~ 2.5m with 1:4 ~ 1:8, then continues cementing fill with 1:8 ~ 1:20 proportion tailings
It fills out stope and connects top and formed to spill obturation.
Compared with prior art, the invention has the following advantages: being directed to product using the method for mining by the way of filling of the present invention
Position is high, economic value is big, the extremely unsteady breaking ore body of ore-rock, and the safety for overcoming existing mining methods to face is low, pushes up
Plate normalization is collapsed, and inbreak, resource depletion loss be big, technique mining circulation takes over that complicated, mechanization degree is low, large labor intensity
The disadvantages of, have panel stope production capacity big, mining time is short, and stoping safety is high, and resources loss is small, adopts and fills process cycles
It takes over and rationally waits remarkable advantages.
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, specific embodiment and phase will be passed through below
Attached drawing is closed, invention is further described in detail.
Detailed description of the invention
Fig. 1 is frame structure sectional view of the present invention；
Fig. 2 is the B-B sectional view of Fig. 1；
Fig. 3 is the C-C sectional view of Fig. 1；
Fig. 4 is local structure schematic diagram in Fig. 2；
Figure label explanation: under 1- oblique top column, 2- to convex obturation, 3- is upper adopts lower ore, the center 5- to spill obturation, 4-
The outer level haulage lane of route, mono- step stope of 6-, 7-panel drop shafts, the horizontal connecting taxiway of 8-, 9- return air fill pass, 10- arteries and veins
Road, bis- step stope of 11-, 12- tailgate, 13- level haulageway, 14- Desending slicing mine, 15- turn layer connecting taxiway.
Specific embodiment
As shown in Fig. 1 ~ 4, the continuous stratification method of mining by the way of filling is inlayed without muscle to bumps under one kind, comprising the following steps: (1) will
Ore body is divided into the stage in vertical direction, and oblique top column is reserved between neighbouring two stages, and a stage undertakes one and reserves
Oblique top column completes the safety coal extraction of stage ore body under the protection of oblique top column, and the stage is divided into multilayer middle section in the height direction；
(2) it is spaced apart mineral building and ore pillar by divided stages along orebody trend, a step stope is arranged in mineral building, in ore pillar
Arrange that two step stopes, every 5 ~ 7 pillars of a house stopes constitute a panel；(3) Barebone, including stage fortune are adopted using the outer trackless of arteries and veins
Defeated tunnel, panel drop shaft, the outer level haulage tunnel of arteries and veins and turn layer connecting taxiway；Under the protection of reserved oblique top column, the is realized first
The back production filling operation of one layer of middle section stope center route, the center route in each middle section and the Cai Xiakuang of upper and lower part both wings ore body
Stone is transported to panel drop shaft by turning layer connecting taxiway, completes ore drawing in stope process；(4) stope in each layer middle section by center route,
First layer and the second layering are constituted, and are first passed through and are turned the back production that layer connecting taxiway completes center route, after the route ore removal of center
Using tailing-filled；(5) after the admission passage filling of center, scene carry out to turn layer carry out first layer actual mining, with
Center route does not connect the free space of both wings ore body continuation back production in route top centered on top part, expands the form of side with route
It completes back production and is formed lower to convex back production section, after stope mining, fill to be formed down to convex obturation using tailings；
(6) second layering in middle section, under the protection of convex obturation, will be carried out lower by the layer connecting taxiway that turn of connection center route
It is lower to turning layer, the form back production that side bears down on one is expanded with route and is formed to spill back production section, constructs filling counterfort after ore removal
And drainage layer, using tailing-filled stope and connect in the formation of top to spill obturation；(7) a step stope of panel mineral building is completed
The actual mining of each layer ore body, under the lateral protection of a step stope filling body, two step stopes of back production Panel barrier are real
The existing poor damage of resource minimizes.
Desending slicing completion method is generally used to carry out back production using the method for mining by the way of filling of the present invention, the stope in each layer middle section is again
It is made of center route, first layer and the second layering, and successively carries out back production；The stope in first floor middle section is in reserved oblique top column
Protection is lower to carry out actual mining, and then the stope in remaining each layer middle section carries out under the obturator protection of upper one layer of middle section stope
Actual mining, the second layering in the stope in each layer middle section are then to carry out actual mining under the filling topic protection of first layer,
In the entire exploitation process of stope, each stages process process cycle alternation forms stable bumps without muscle mosaic texture, realizes
The safety coal extraction of stope.
It is directed to that grade is high, economic value is big, the extremely unsteady breaking ore body of ore-rock using the method for mining by the way of filling of the present invention,
Inbreak that safety for overcoming existing mining methods to face is low, top plate normalization is collapsed, resource depletion loss be big, technique mining
Circulation takes over the disadvantages of complicated, mechanization degree is low, large labor intensity, has panel stope production capacity big, and mining time is short,
Stoping safety is high, and resources loss is small, adopts and fills process cycles and take over rationally equal remarkable advantages；(1) safe Gao Xinggao: panel is exploited
Pillars of a house stope uses working to the dip, and in the entire exploitation process of stope, each middle section process for stoping process cycle alternation is formed surely
Fixed is concave-convex without muscle mosaic texture, and worker and winning equipment are always in oblique top column and the concave-convex protection without muscle mosaic texture obturation
Lower operation, while the trackless of panel stope adopts Barebone and is arranged in ore body lower wall, has safe production operation condition；(2) it provides
The source rate of dilution, loss late are low: the present invention is directed to the extreme breaking ore body of high-grade, on the one hand, under the premise of ensuring safety, only exists
Oblique top column is reserved between each stage, oblique top column is with a thickness of 5 ~ 10m, after panel stope back production, passes through route or V-arrangement moat
The recycling of ditch realization oblique top column mineral resources；On the other hand, a step rooming, two step stooping pillarings, strict control are adopted
Mine breadth and control heights of roofs, are filled after stope using the consolidated fill technique of different ratio and packed height, are not stayed
Lower stope pillar realizes low poor damage back production；(3) panel stope production capacity is big, mining time is short: every 5 ~ 7 pillars of a house stope structure
At a panel, the wide 8 ~ 12m of mineral building, the wide 10 ~ 15m of ore pillar；In recovery process, a nugget is simutaneously arranged non-interfering adopt
Field work surface, realizes the orderly converting parallel operation of stope space-time.Meanwhile ore removal is carried out using Trackless self equipment, Qiang Caiqiang goes out,
Substantially reduce the stope mining time.Mining experiment effect shows that it can be 275.0t/d that panel, which averagely produces, maximum statistics disk
Area's production capacity reaches 445.0t/d；(4) segmentation stope structure is simple: the present invention is directed to the extreme breaking ore body of high-grade, in
Heart route, first layer, the second layering stope are constituted, and first layer stope is cementing by different ratio three times and packed height
Filling process forms lower to convex obturation；Second layering stope, which is formed by consolidated fill technique twice to spill, to be filled
Body；In practice process, a stage arranges 4 ~ 5 middle sections, needs to arrange a center route and a water in each middle section
Flat turns layer connecting taxiway, by connection center route turn layer connecting taxiway above and below to turn layer take over completion adopt the technique for filling circulation
Process is orderly connected.
Invention method of mining by the way of filling main economic and technical indices are as follows:
(1) it adopts and cuts ratio: 36.7m3/kt, add up to 9.2 standard m/kt.
(2) rock drilling machine-team efficiency: 25 ~ 30m/ machine-team.
(3) ore removal efficiency: 100 ~ 150t/ machine-team.
(4) panel stope overall efficiency: 200 ~ 450t/d.
(5) mining shift efficiency: 20 ~ 35t/ work team.
(6) recovery process loss late: 5.3%.
(7) the recovery process rate of dilution: 6.0%.
(8) mining direct cost: 37.5 yuan/t.
In the present embodiment, in step (1), stage high 60m, oblique top column 5 ~ 10m of thickness, the high 10 ~ 15m in middle section；Step (2)
In, the wide 8 ~ 12m of mineral building, the wide 10 ~ 15m of ore pillar.
In the present embodiment, in step (4), center drift stoping control is risen as 6 ~ 7m, back production 3 ~ 4m of breadth, center route
Using tailing-filled 3 ~ 3.5m of 1:4 ~ 1:8 proportion after ore removal.
In the present embodiment, in step (5), back production height is 3 ~ 3.5m, after stope mining, is first matched with 1:4 ~ 1:8
Than tailing-filled 2 ~ 2.5m, then continue consolidated fill stope with the proportion tailings of 1:8 ~ 1:20 and connect to fill under top is formed to convex
Fill out body.
In the present embodiment, in step (6), on to the height of spill back production section be 3 ~ 3.5m, maximum control heights of roofs be 6
~ 7m, tailing-filled process are first to match tailing-filled 2 ~ 2.5m with 1:4 ~ 1:8, then continue glue with 1:8 ~ 1:20 proportion tailings
Knot filling stope simultaneously connects in the formation of top to spill obturation.
Fujian Longyan mine is structural fracture or the ore body that crushed zone controls, and ore body totally moves towards northwest (NW), is inclined to Nan Xihuo
East northeast.Ore body upper lower burrs country rock predominantly in grain granite, intact rock laboratory list compression strength value is generally 30.5~
42.6MPa.Field survey discovery, protolith ore body and upper lower burrs country rock are controlled by structural fracture or crushed zone, crack hair development, rock
Stone RQD value is generally less than 40%, and in mining engineering, main engineering geological problems are goaf top plate normalization inbreak.X-ray
It is horizontal to -40m in -225m level in preservation absolute altitude that ore body tests nugget, this I-2 ore body 31 lines between 46 lines (about
225m), the slanting angle of ore body is 45 ° ~ 61 °, and 15 ~ 30m of thickness moves towards long 175m.
Select mine -100 ~ -40 as the stage for implement under the present invention to bumps without muscle inlay continuous stratification filling adopt
Mine method, specific implementation step are:
(1) stage high 60m, reserved oblique top column between the upper next stage, oblique top 5 ~ 10m of column thickness, each divided stages multilayer middle section, often
The layer high 10 ~ 15m in middle section, a stage undertake a reserved oblique top column, the peace of the stage ore body are completed under the protection of oblique top column
Full back production；
(2) the spaced apart mineral building of divided stages and ore pillar are arranged into a step stope, in ore pillar in mineral building along orebody trend
Two step stopes of middle arrangement, every 5 ~ 7 pillars of a house stopes constitute a panel, the wide 8 ~ 12m of mineral building, the wide 10 ~ 15m of ore pillar；
(3) include level haulageway, panel drop shaft, the outer level haulage tunnel of arteries and veins and turn layer connecting taxiway；In reserved oblique top column
Under protection, the back production filling operation of first layer middle section stope center route is realized first, the stope in middle section is again by center route, the
One layering and the second layering are constituted, and ore is by turning layer contact under the center route in each middle section and the adopting of upper and lower part both wings ore body
Road is transported to panel drop shaft, completes ore drawing in stope process；
(4) it is -43.5m that head, which adopts middle section absolute altitude, by under the protection of reserved oblique top column, turns layer connection by connection center route
The back production of network road completion center route, center drift stoping control are risen as 6 ~ 7m, back production 3 ~ 4m of breadth, and center route ore removal is complete
Finish, 3 ~ 3.5m of tailing-filled filling is matched using 1:4 ~ 1:8；
(6) after the admission passage filling of center, scene is carried out to turning layer, is not connect centered on top part on route with center route
Portion's both wings ore body continues the free space of back production, completes back production in the form that route expands side, back production height is 3 ~ 3.5m, and stope returns
After adopting, tailing-filled 2 ~ 2.5m first is matched with 1:4 ~ 1:8, then continues consolidated fill with the proportion tailings of 1:8 ~ 1:20 and adopts
Field simultaneously connects under top is formed to convex obturation；
(7) first the second slicing absolute altitude for adopting middle section is -50.0m, under the protection of convex obturation, will pass through company lower
Connect center route turn layer connecting taxiway carry out it is lower to turning layer, with route expand the form back production that side bears down on one formed it is disconnected to spill back production
Face, profile height are 3 ~ 3.5m, and maximum control heights of roofs is 6 ~ 7m, constructs filling counterfort and drainage layer after ore removal, first uses 1:4
Then the tailing-filled 2 ~ 2.5m of ~ 1:8 high mixture ratio continues consolidated fill stope with the low proportion tailings of 1:8 ~ 1:20 and connects top, shape
On to spill obturation.
(8) it connects each layering access road of center route and takes over circulation to turning layer above and below, a step of completion panel mineral building
The actual mining of each layer ore body of stope, under the lateral protection of a step stope filling body, two steps of back production Panel barrier are adopted
, realize that the poor damage of resource minimizes.
Any technical solution disclosed in aforementioned present invention unless otherwise stated, if it discloses numberical range,
Disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numberical ranges
The only obvious or representative numerical value of technical effect in many enforceable numerical value.It, can not since numerical value is more
Exhaustion, so the present invention just discloses technical solution of the component values to illustrate the present invention, also, the above-mentioned numerical value enumerated is not
The limitation to the invention protection scope should be constituted.
If the present invention is open or relates to the components or structural member of connection fastened to each other, unless otherwise stated,
It is fixedly connected it is to be understood that connection (such as connecting using bolt or screw) can be removedly fixed, it is understood that are as follows:
It is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (such as make
Manufactured with casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).
In addition, for indicating the art of positional relationship or shape applied in any technical solution disclosed in aforementioned present invention
Its meaning includes approximate with its, similar or close state or shape to language unless otherwise stated.
Either component provided by the invention by multiple individual component parts either assembled, or one
The separate part that forming technology manufactures.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (5)
1. inlaying the continuous stratification method of mining by the way of filling without muscle to bumps under one kind, it is characterised in that: the following steps are included: (1) is by mine
Body is divided into the stage in vertical direction, and oblique top column is reserved between neighbouring two stages, and a stage undertakes one and reserves tiltedly
Top pillar completes the safety coal extraction of stage ore body under the protection of oblique top column, and the stage is divided into multilayer middle section in the height direction；
(2) it is spaced apart mineral building and ore pillar by divided stages along orebody trend, a step stope is arranged in mineral building, in ore pillar
Arrange that two step stopes, every 5 ~ 7 pillars of a house stopes constitute a panel；(3) Barebone, including stage fortune are adopted using the outer trackless of arteries and veins
Defeated tunnel, panel drop shaft, the outer level haulage tunnel of arteries and veins and turn layer connecting taxiway；The center route and upper and lower part both wings mine in each middle section
Ore is transported to panel drop shaft by turning layer connecting taxiway under the adopting of body, completes ore drawing in stope process；(4) stope in each layer middle section by
Center route, first layer and the second layering are constituted, and are first passed through and are turned the back production that layer connecting taxiway completes center route, and center route goes out
Using tailing-filled after mine；(5) after the admission passage filling of center, scene is carried out to the back production for turning layer progress first layer
Work is not connect the free space of both wings ore body continuation back production in route top centered on top part with center route, is expanded with route
The form of side completes back production and is formed lower to convex back production section, after stope mining, fills to be formed down to convex using tailings
Obturation；(6) second layering in middle section, under the protection of convex obturation, will turn layer contact by connection center route lower
Road carries out lower to turning layer, expands the form back production that side bears down on one with route and is formed to spill back production section, constructs and fill after ore removal
Barricade and drainage layer are filled out, using tailing-filled stope and is connect in the formation of top to spill obturation；(7) step of panel mineral building is completed
The actual mining of each layer ore body of rapid stope, under the lateral protection of a step stope filling body, two steps of back production Panel barrier
Stope.
2. lower the continuous stratification method of mining by the way of filling is inlayed without muscle to bumps according to claim 1, it is characterised in that: step
(1) in, stage high 60m, oblique top column 5 ~ 10m of thickness, the high 10 ~ 15m in middle section；In step (2), the wide 8 ~ 12m of mineral building, ore pillar is wide by 10 ~
15m。
3. lower the continuous stratification method of mining by the way of filling is inlayed without muscle to bumps according to claim 1, it is characterised in that: step
(4) in, center drift stoping control is risen as 6 ~ 7m, back production 3 ~ 4m of breadth, is matched after the route ore removal of center using 1:4 ~ 1:8
Tailing-filled 3 ~ 3.5m.
4. lower the continuous stratification method of mining by the way of filling is inlayed without muscle to bumps according to claim 1, it is characterised in that: step
(5) in, back production height is 3 ~ 3.5m, after stope mining, first matches tailing-filled 2 ~ 2.5m with 1:4 ~ 1:8, then uses 1:8
The proportion tailings of ~ 1:20 continues consolidated fill stope and connects under top is formed to convex obturation.
5. lower the continuous stratification method of mining by the way of filling is inlayed without muscle to bumps according to claim 1, it is characterised in that: step
(6) in, on to the height of spill back production section be 3 ~ 3.5m, maximum control heights of roofs be 6 ~ 7m, tailing-filled process is first to use 1:4
~ 1:8 matches tailing-filled 2 ~ 2.5m, then continues consolidated fill stope with 1:8 ~ 1:20 proportion tailings and connect top to be formed to recessed
Shape obturation.
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| CN111485883A (en) * | 2020-04-30 | 2020-08-04 | 昆明理工大学 | High ground stress environment low-cost mining method based on paste-multi-medium collaborative filling |
| CN112576302A (en) * | 2020-11-24 | 2021-03-30 | 河南理工大学 | Partition paste filling method for preventing slurry leakage and improving filling effect |
| CN113356851A (en) * | 2021-06-08 | 2021-09-07 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Medium-thickness ore body continuous downward medium-length hole subsection open stoping subsequent filling mining method |
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| CN111485883A (en) * | 2020-04-30 | 2020-08-04 | 昆明理工大学 | High ground stress environment low-cost mining method based on paste-multi-medium collaborative filling |
| CN111485883B (en) * | 2020-04-30 | 2021-07-23 | 昆明理工大学 | High ground stress environment low-cost mining method based on paste-multi-medium collaborative filling |
| CN112576302A (en) * | 2020-11-24 | 2021-03-30 | 河南理工大学 | Partition paste filling method for preventing slurry leakage and improving filling effect |
| CN112576302B (en) * | 2020-11-24 | 2022-08-30 | 河南理工大学 | Partition paste filling method for preventing slurry leakage and improving filling effect |
| CN113356851A (en) * | 2021-06-08 | 2021-09-07 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Medium-thickness ore body continuous downward medium-length hole subsection open stoping subsequent filling mining method |
| CN113356851B (en) * | 2021-06-08 | 2024-02-02 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Continuous downward medium-length hole segmented open stoping subsequent filling mining method for medium-thickness ore body |
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