CN110295909A - Only stay mining methods under the obturation of tooth form ore pillar - Google Patents
Only stay mining methods under the obturation of tooth form ore pillar Download PDFInfo
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- CN110295909A CN110295909A CN201910666425.9A CN201910666425A CN110295909A CN 110295909 A CN110295909 A CN 110295909A CN 201910666425 A CN201910666425 A CN 201910666425A CN 110295909 A CN110295909 A CN 110295909A
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- 238000005065 mining Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 53
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 50
- 239000011707 mineral Substances 0.000 claims abstract description 50
- 239000011435 rock Substances 0.000 claims abstract description 36
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000036642 wellbeing Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000005553 drilling Methods 0.000 description 9
- 238000011084 recovery Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 6
- 208000036366 Sensation of pressure Diseases 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000031016 anaphase Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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Abstract
The invention discloses one kind only to stay mining methods under the obturation of tooth form ore pillar: first adopt a step mineral building stope, after adopt two step ore pillar stopes, mineral building stope uses consolidated fill, and ore pillar stope uses non-cementing or consolidated fill；Mineral building stope under one step back production obturation, direct back production to obturation bottom surface, after stope mining, dead zone two sides are the ore-rock of adjacent ore pillar stope, and top is obturation, and consolidated fill is carried out after the completion of ore removal；Ore pillar stope under two step back production obturations, does not disclose obturation bottom surface, under stay the ore-rock not back production for setting certain altitude.In a manner described after the stage ore body under the complete obturation of back production, it does not stay and sets complete protolith level pillar, and only form the less tooth form ore pillar of mine amount, reduce protolith level pillar mine amount between the stage, the disposable high winning technology rate of resource in normal production unit is improved, and then increases the economic well-being of workers and staff of bargh's exploitation.
Description
Technical field
The present invention relates to adopt under a kind of underground mine production technique, more particularly to a kind of obturation for only staying tooth form ore pillar
Mine method is primarily adapted for use in the safety economy high-efficiency mining of underground metalliferous nonmetallic ore.
Background technique
With the continuous improvement to mine safety and environmental consciousness and to the pay attention to day by day of mineral resource recovery rate, filling
Mining codes obtain great development and extensive use in recent years.And before underground mine filling exploitation, it need to be according to its production technique
Condition carries out mining concept, adopts the design of making rational planning for for filling sequence, Earth pres-sure control and Technological Economy etc., especially up and down
The isolation of mining with stowing operation between adjacent phases, transition and be connected, directly affect mining with stowing production operation safety and
Economy.
In the filling mining of underground mine, gives full play to goaf filling and to safety improvement press, improve resource reclaim
Rate, the advantage for increasing mining economy income etc., while solving that obturation is weaker with respect to protolith, obturation exposure stability
Disadvantage problem difficult to control etc. is the key that realize the efficient mining with stowing of safety economy.
Using timely bashing is needed in the underground mine of filling method, after stope mining, provided for exploitation periphery stope
Necessary condition.After the completion of top bench ore body is adopted substantially and filled, obturation of upper stage lower part must be prepared in advance close to stage ore body
Exploitation engineering, and then face the problem of digging up mine under obturation.
The prior art one:
It is to stay to set certain thickness complete protolith water between the stage in order to which " relatively weak " obturation in upper stage is isolated
Flat ore pillar, " frame structure " of " relative stiffness " between formation stages reduce upper stage obturation and cause in next stage mining
It is lower collapse risk to exposure, and the closure of adopting for requiring the complete protolith level pillar to be capable of rigid support upper lower burrs country rock becomes
Shape.
Wherein, between the stage arrangement mode schematic diagram of protolith level pillar as shown in Figure 1, the program is current filling method
Main technical schemes when lower mine is dug up mine under obturation.Between stage protolith level pillar can by Stope sill pillar of upper stage and
Next stage stope top pillar collectively forms, as shown in figure 1 (a)；The horizontal curtain wall of protolith between the stage of setting, such as Fig. 1 can also specially be stayed
In (b).It is usually to be returned in orebody mining latter stage as remnant ore resource that the stock number for setting protolith level pillar is stayed between stage
It receives.
The mining method of protolith level pillar between above-mentioned one reservation stage of the prior art, there are the following problems:
(1) from stoping safety angle
1. it stays between the stage of setting after protolith level pillar, when the exploitation of one step mineral building stope of lower stage is completed and is filled, by
It shrinks characteristic in the consolidation of obturation, obturation is difficult to realize connect top with the rigidity of top protolith level pillar, leads to two steps
After the exploitation of ore pillar stope, the goaf of mineral building stope filling body two sides ore pillar stope is perforation in protolith level pillar lower surface
, and then cause the outstanding top of large area of protolith level pillar between the stage, the risk height that fracture is collapsed is generated, two step ore pillars are threatened
Safety when stope is exploited；
2. the stress of primary rock shifts around after upper stage stope mining, protolith ore pillar stress increases between the stage, adjoint
The exploitation of its next stage each stope, the stress load that protolith ore pillar is born between the stage further increase, and above and below protolith ore pillar
The stope filling body in stage is opposite soft-medium, and the movement and deformation that upper lower burrs country rock closure function generates mainly is applied between the stage
On protolith ore pillar, its stress high concentration is caused, underground hazard activity is may cause acutely, triggers the security risk of underground hazard
It is high；
3. the stock number later period for setting protolith level pillar is stayed to recycle between the stage as remnant ore resource, stress is high, damaged
Degree is big, and when later period sensible entrance stage level pillar carries out remnant ore resource back production, personnel and equipment safety risk are high.
(2) from exploitation economy point
1. country rock closure deformation caused by exploiting for next stage stope in rigid support, stage level pillar, which need to stay, to be set enough
Height competence exertion effectively controls ground pressure effect, and excessively thin level pillar is difficult to realize Earth pres-sure control function, but bargh
It is initial investment construction underground mining engineering, the stock number for staying the level pillar for setting enough height to occupy is big, and recycles lag, pressure
Control is serious, is equivalent to and occupies great amount of investment cost, enterprise income lag；
2. level pillar generally can only be in orebody mining latter stage as remnant reclaiming, due to its Anaphase expl oitation between the stage
Worsening condition, there are uncertain problems, the rate of recovery such as recovery technology, recycling safety are generally very low, it is also possible to it can not recycle,
The a large amount of permanent loss for causing mineral resources, seriously affect the investment return of bargh.
(3) from exploitation high efficiency angle
1. effectively to play Earth pres-sure control effect, protolith level pillar between needing to stay the stage for setting enough height causes rank
Section between level pillar a large amount of pressure ore resources cannot in normal stope high winning technology, thereby reduce can large diameter, deep borehole it is efficient
The mine amount ratio of mining, is equal to the production efficiency for reducing the stage ore body stope；
2. the recycling of protolith level pillar later period is difficult between the stage, it is typically only capable to select the lower remaining ore recovery of labor productivity
Technique, moreover, the later period often has moved away from large scale mining mine section region when recycling, mining line is elongated, and personnel equipment is logical
Reach, the abilities such as ore removal haulage it is limited, the complex management of Mine Safety in Production, production efficiency is low.
Summary of the invention
The object of the present invention is to provide one kind only to stay mining methods under the obturation of tooth form ore pillar.
The purpose of the present invention is what is be achieved through the following technical solutions:
Mining methods under the obturation for only staying tooth form ore pillar of the invention, comprising steps of
(1) the stage ore body interval under obturation is divided into two step stopes, first adopts a step mineral building stope, after adopt two steps
Rapid ore pillar stope, mineral building stope use consolidated fill, and ore pillar stope uses non-cementing or consolidated fill；
Mineral building stope under (2) one step back production obturations, direct back production to obturation bottom surface, after stope mining,
Dead zone two sides are the ore-rock of adjacent ore pillar stope, and top is obturation, and consolidated fill is carried out after the completion of ore removal；
Ore pillar stope under (3) two step back production obturations, does not disclose obturation bottom surface, under stay the mine for setting certain altitude
Rock not back production, after stope mining, dead zone two sides are the cemented fill of adjacent mineral building stope, and top is ore-rock, and ore removal is complete
At the non-cementing or consolidated fill of rear progress；
(4) it does not stay after the stage ore body under the complete obturation of back production in a manner described and sets complete protolith level pillar, and only
The less tooth form ore pillar of mine amount is formed, which is completed in normal large scale mining and then returned in a manner of residual mine
It adopts；
(5) the consolidated fill layer that obturation of upper stage bottom need to have certain thickness intensity to meet the requirements；
(6) above-mentioned step mineral building stope and two step ore pillar stopes select stage open stope afterwards filling method, sublevel open stoping
Afterwards filling method, Upward slicing or Upward drift back production.
As seen from the above technical solution provided by the invention, provided in an embodiment of the present invention is stayed filling for tooth form ore pillar
Mining methods under body are filled out, realize mining under the obturation for only staying a small amount of tooth form ore pillar, protolith is horizontal between reducing the stage
Ore pillar mine amount, improves the disposable high winning technology rate of resource in normal production unit, and then increases bargh's exploitation
Economic well-being of workers and staff.
Detailed description of the invention
Fig. 1 is to stay the mining concept schematic diagram for setting protolith level pillar (to walk perpendicular to ore body under obturation in the prior art
When to arrangement stope, along the profilograph of orebody trend), in figure: (a) staying and set stage top pillar and foundation；(b) whole stay sets protolith
Horizontal curtain wall；
Fig. 2 is to stay the mining concept schematic diagram for setting tooth form ore pillar (to walk perpendicular to ore body under obturation in the embodiment of the present invention
When to arrangement stope, along the profilograph of orebody trend), in figure: (a) rectangle tooth post；(b) concave arc row tooth post in；(c) indent
Semicircle tooth post；(d) indent triangle tooth post；
Fig. 3 is in the embodiment of the present invention, certain iron ore mother-lode, which is adopted, fills status and along the vertical section of orebody trend representative region
Figure；
Fig. 4 is in the embodiment of the present invention, the tooth form ore pillar method for arranging dug up mine under certain iron ore obturation and adopts and fills conceptual scheme,
In figure: (a) one step mineral building stope of explosion back production；(b) one step mineral building goaf of consolidated fill；(c) two step of explosion back production
Ore pillar stope；(d) non-cementing or two step ore pillar goaf of consolidated fill.
Specific embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art well known to professional and technical personnel in the field.
Mining methods under the obturation for only staying tooth form ore pillar of the invention, preferable specific embodiment such as Fig. 2 institute
Show:
Comprising steps of
(1) the stage ore body interval under obturation is divided into two step stopes, first adopts a step mineral building stope, after adopt two steps
Rapid ore pillar stope, mineral building stope use consolidated fill, and ore pillar stope uses non-cementing or consolidated fill；
Mineral building stope under (2) one step back production obturations, direct back production to obturation bottom surface, after stope mining,
Dead zone two sides are the ore-rock of adjacent ore pillar stope, and top is obturation, and consolidated fill is carried out after the completion of ore removal；
Ore pillar stope under (3) two step back production obturations, does not disclose obturation bottom surface, under stay the mine for setting certain altitude
Rock not back production, after stope mining, dead zone two sides are the cemented fill of adjacent mineral building stope, and top is ore-rock, and ore removal is complete
At the non-cementing or consolidated fill of rear progress；
(4) it does not stay after the stage ore body under the complete obturation of back production in a manner described and sets complete protolith level pillar, and only
The less tooth form ore pillar of mine amount is formed, which is completed in normal large scale mining and then returned in a manner of residual mine
It adopts；
(5) the consolidated fill layer that obturation of upper stage bottom need to have certain thickness intensity to meet the requirements；
(6) above-mentioned step mineral building stope and two step ore pillar stopes select stage open stope afterwards filling method, sublevel open stoping
Afterwards filling method, Upward slicing or Upward drift back production.
In two step stopes of the step (1):
If perpendicular to orebody trend arrange stope, length of stope be 20~120m of orebody thickness, Width of stope be 10~
30m；
If arranging that stope, length of stope are 20~120m along orebody trend, Width of stope is 6~30m of orebody thickness,
Stope height is 30~150m.
In the step (1), for especially thick big ore body, ore body is first divided into several panels, in each panel
It is interior, moved towards along panel or move towards to carry out stope division perpendicular to panel, length of stope is 60~120m, Width of stope for 10~
30m, stope height are 30~150m.
In the step (4), finally formed tooth form ore pillar height is 3~20m.
In the step (4), in the vertical cross-section along Width of stope direction, finally formed tooth form pillar shape packet
It includes rectangle or bottom surface is the tooth form ore pillar of the shapes such as indent dome-shaped, interior concave polygon.Interior concave polygon include indent triangle,
Indent quadrangle or indent hexagon, even more sides are protection scope of the present invention.
In the step (5), the uniaxial compressive strength of upper stage cemented fill bottom is not less than 1.2MPa, and this layer
Thickness is not less than 5m.
In the step (2), when mineral building stope under a step back production obturation, obturation bottom surface can not be disclosed, in mine
The mine wall for setting necessary thickness is stayed at the top of room stope, the thickness of the mine wall cannot be greater than adjacent tooth form ore pillar thickness.
In specific implementation:
Mineral building stope under one step back production obturation, direct back production to obturation bottom surface, as in Fig. 2 room 1. with room 2..
After stope mining, dead zone two sides are the ore-rock of adjacent ore pillar stope, and top is obturation.Cementing fill is carried out after the completion of ore removal
It fills out.Need to be followed when mineral building stope mining " every three adopt one or one stop panel " stopping sequence, first forewinning 1., delay filling room 1.,
Then forewinning is 2. again.
Ore pillar stope under two step back production obturations, does not disclose obturation bottom surface, under stay the ore-rock for setting certain altitude
Not back production, as Fig. 2 center pillar 3. with column 4..After stope mining, dead zone two sides are the cemented fill of adjacent mineral building stope, top
Portion is ore-rock.Non- cementing or consolidated fill is carried out after the completion of ore removal.It need to be followed when ore pillar stope mining and " adopt one every three or adopted every one
One " stopping sequence, 3., 3., then forewinning is 4. again in delay filling room for first forewinning.
In step (4), finally formed tooth form ore pillar height is generally 3~20m, but its specific value, should be according to reality
Situations such as mining methods, Stope dimension, ore and rock condition, considers each ore pillar stope tooth form ore pillar self weight and its two sides mineral building stope
The factors such as the clamping force of cemented fill are determined through theoretical calculation.In the vertical cross-section along Width of stope direction, most
End form at tooth form pillar shape be not limited only to rectangle, can also according to stope mining technique, adopt into bottom surface be indent dome-shaped,
The tooth form ore pillar of the shapes such as interior concave polygon, can reduce the self weight of every tooth form ore pillar, and improve ore recovery ratio.Indent is polygon
Shape includes indent triangle, indent quadrangle or indent hexagon, and even more sides is protection scope of the present invention.
In step (5), the uniaxial compressive strength of upper stage cemented fill bottom is generally not less than 1.2MPa, and this layer
Thickness is generally not less than 5m, but the intensity and Thickness of specific bottom cemented fill, should be according to practical mining methods, stope
Situations such as size, ore and rock condition, determines through theoretical calculation.And before practical exploitation, it must detect in advance and assess the consolidated fill
Whether the intensity and thickness of body bottom meet design requirement.
In step (2), when mineral building stope under a step back production obturation, obturation bottom surface can not also be disclosed, in mine
The mine wall for setting necessary thickness is stayed at the top of room stope, it is especially larger in the mineral building stope span, top cemented fill bottom
Intensity is weaker, thinner thickness when, necessity is bigger.But the thickness of the mine wall cannot generally be greater than adjacent tooth form ore pillar thickness.
Mining methods under the obturation for only staying tooth form ore pillar of the invention, mainly solve following technical problem:
(1) mining height of the obturation that is staggered lower stage mineral building and ore pillar stope solves a step mineral building stope filling
Body difficulty, which connects top, leads to the outstanding top perforation bring roof safety problem in two step ore pillar stope dead zones；
(2) it rationally designs to adopt and fills timing, realize the gradually release of protolith level pillar, reduce the stress collection of protolith level pillar
Middle degree solves to stay the ground pressure risk problem for setting complete protolith level pillar stress concentration initiation；
(3) Earth pres-sure control for giving full play to consolidated fill layer and tooth form protolith ore pillar assembly acts on, and solves underground mine
The safe and efficient back production problem of normal production unit；
(4) the protolith level pillar between the stage when digging up mine under obturation, is not stayed/stayed less, resource recovery rate is improved.
Specific embodiment:
Certain Large Underground iron ore mine produces about 3,000,000 tons of iron ores per year, and ore Iron grade is mostly 27~38%, and all iron content is most
A height of 44.5%.Mother-lode is thick big, and thickness about 40~160m, ore body tilts to high-dipping, about 60~80 ° of inclination angle.Mother-lode mine
Rock and roof and floor are mainly gneiss and amphibolite, rock cranny agensis, rock-mass quality classification be it is medium, rock mass is completeer
Whole, engineering geological condition is medium, and hydrogeologic condition is medium.
Mother-lode design in mine uses large diameter, deep borehole stage open stope afterwards filling mining method, arranges perpendicular to orebody trend
Stope, length of stope are orebody thickness, about 40~160m, and Width of stope is 16~18m, and it is 45 that stope height, which is level interval,
~60m.
Four exploitation middle sections of the current major design of mine mother-lode (- 170~-230m, -230~-290m, -290~-
350m, the middle section -350~-395m).Wherein, the middle section -170~-230m is the mine middle section Shou Cai, and the head adopts that middle section is all to adopt at present
Field is adopted substantially to be charged into；The middle section -230~-290m ore-rock is integrally stayed to set and not adopted as horizontal curtain wall；- 290~-
Exploitation finishes the one step mineral building stope in the middle section 350m and the middle section -350~-395m substantially, is carrying out goaf filling
Work.Status and profilograph such as Fig. 3 along orebody trend representative region are filled in adopting for the mine mother-lode.
The exploitation pattern of the mine mother-lode, generally existing in underground mine: mine construction initial stage first exploits and fills and sees
The first middle section ore-rock after mine adopts exploitation period and the return of funds in middle section using head, and investment construction deep each stage opens
Open up mining preparation work, and the step mineral building stope after the completion of appropriate back production deep construction.And middle section obturation is adopted in order to which head is isolated
With the mining of deep-seated setting, the stage ore-rock set under obturation is integrally stayed not adopt, adopting for upper part and lower stage is isolated
Mine activity.But the exploitation pattern the mine life cycle a certain moment certainly will will all face head adopt under the obturation of middle section how
The problem of mining.
Using the method for the present invention, tooth form ore pillar method for arranging that example mine is dug up mine under obturation and adopts and fill conceptual scheme such as
Shown in Fig. 4, specifically comprises the following steps and requires:
(1) the complete protolith level pillar set between the middle section -170~-230m and the middle section -230~-290m is not stayed.If you need to
The complete protolith level pillar between setting the stage is stayed, stays and sets height palpus greater than 30m, thick big mother-lode -230 is just able to satisfy with this
The stability of the middle section~-290m stope recovery process.
Continue to use large diameter, deep borehole stage open stope afterwards filling mining method, one step of arranged for interval in (2) middle sections -230~-290m
Mineral building stope and two step ore pillar stopes, Stope dimension be 40~160m of length, width 18m, height 45~60m.
(3) rock drilling in the horizontally disposed middle section -230~-290m -240~-245m is horizontal.
(4) Drilling is big under -240~-245m rock drilling horizontal direction of one step mineral building stope of the middle section -230~-290m first
The Undercut layer of diameter vertical long hole (aperture 165mm, 45~50m of hole depth) extremely -290m level, while in this rock drilling horizontal direction
Upper Drilling medium-length hole (aperture 60mm, 10~20m of hole depth) is horizontal to -230m obturation bottom surface.
It (5) is the starting scope of freedom, point 3 downward ore cavings with mineral building Bottom of Stope Undercut layer.It is big straight in last time
When under diameter deep hole to ore caving, rock drilling horizontal upper part medium-length hole and lower part large diameter, deep borehole are controlled into explosion together, first quick-fried major diameter
Deep hole, rear quick-fried top medium-length hole.When medium-length hole blasting, using the cutting groove dug in advance close to disk on stope as the scope of freedom, laterally
Ore caving.Ore body thickness general goal, length of stope is big, when large diameter, deep borehole and medium-length hole control explosion, using point from upper disk to lower wall
Retrusive ore caving is walked, the horizontal ore removal of -290m ore removal is unified in.
(6) after the completion of mineral building ore drawing in stope, consolidated fill is horizontal to -230m, and cemented fill intensity is according to length of stope
(orebody thickness) specific aim choose, one step mineral building stope cemented fill intensity value range of -230~-290m be 0.8~
1.5MPa (cemented fill laterally discloses the 40~160m of length in face, width 18m, height 45m).
(7) adjacent mineral building stope cemented fill curing age exploits two adjacent step ore pillar stopes up to after 28 days.Needle
P- two step ore pillar stope of the middle section 230~-290m, the Drilling major diameter vertical long hole under -240~-245m rock drilling horizontal direction
The Undercut layer of (aperture 165mm, 45~50m of hole depth) to -290m level, point 3 downward ore cavings are horizontal in -290m ore removal
Ore removal.Ore-rock at the top of ore pillar stope to -230m level, which is stayed to set, does not adopt.
(8) after the completion of ore pillar ore drawing in stope, non-cementing or consolidated fill goaf is fills up to -240~-245m rock drilling water
It is flat.
(9) the p- middle section the 170~-230m stope filling body of palpus carries out coring detection in situ, tests coring obturation sample power
Intensity is learned, the discreteness distribution characteristics of strength of filling mass in situ is statisticallyd analyze.It is required that the glue of the middle section -170~-230m Bottom of Stope
It ties obturation height and is not less than 5m, uniaxial compressive strength is not less than 1.2MPa.
Technical solution of the present invention has the following beneficial effects: to when digging up mine under obturation
(1) mining under the obturation for only staying a small amount of tooth form ore pillar is realized, protolith level pillar mine between the stage is reduced
Amount, improves the disposable high winning technology rate of resource in normal production unit, and then increases the economic of bargh's exploitation and receive
Benefit；
(2) mining height of reasonable be staggered mineral building and ore pillar stope, solves a step mineral building stope filling body difficulty and connects
Top leads to the outstanding top perforation bring roof safety problem in two step ore pillar stope dead zones；
(3) it devises reasonably to adopt and fills timing, realize the gradually release of protolith level pillar, reduce protolith level pillar
Stress concentration degree, be effectively relieved to stay and set complete protolith level pillar stress and concentrate the ground pressure risk caused；
(4) Earth pres-sure control for having given full play to consolidated fill layer and tooth form protolith ore pillar assembly acts on, and is underground mine
The high winning technology of normal production unit, which provides, safely presses environment-guarantee；
(5) the remaining ore recovery amount of the following level pillar is greatly reduced, improves the safety and comprehensive effect of mining
Rate.
Key problem in technology point of the invention includes:
Stage ore body interval under obturation is divided into two step stopes, first adopts a step mineral building stope, after adopt two steps
Rapid ore pillar stope, mineral building stope use consolidated fill, and ore pillar stope uses non-cementing or consolidated fill.One step back production obturation
Under mineral building stope, direct back production to obturation bottom surface, after stope mining, dead zone two sides are adjacent ore pillar stope ore-rock,
Top is obturation, and consolidated fill is carried out after the completion of ore removal.Ore pillar stope under two step back production obturations, does not disclose obturation
Bottom surface, but the ore-rock not back production for setting 3~20m high is stayed, after ore pillar stope mining, dead zone two sides, which are that mineral building stope is cementing, to be filled
Body is filled out, top is ore-rock, and non-cementing or consolidated fill is carried out after the completion of ore removal.Stage under the complete obturation of back production in a manner described
It after ore body, does not stay and sets complete protolith level pillar, and only form the less tooth form ore pillar of mine amount.Tooth form pillar shape not only limits
It can also be the tooth form ore pillar that bottom surface is the shapes such as indent dome-shaped, interior concave polygon in rectangle.Interior concave polygon includes indent three
Angular, indent quadrangle or indent hexagon, even more sides are protection scope of the present invention.Upper stage stope filling body
The bottom consolidated fill layer that need to there is certain thickness intensity to meet the requirements, it is desirable that the thickness degree is not less than 5m, uniaxial compressive
Intensity is not less than 1.2MPa.Above-mentioned step mineral building stope and two step ore pillar stopes can be selected stage open stope afterwards filling method,
The mining methods back production such as sublevel open stoping afterwards filling method, Upward slicing or Upward drift.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (8)
1. one kind only stays mining methods under the obturation of tooth form ore pillar, which is characterized in that comprising steps of
(1) the stage ore body interval under obturation is divided into two step stopes, first adopts a step mineral building stope, after adopt two step mines
Column stope, mineral building stope use consolidated fill, and ore pillar stope uses non-cementing or consolidated fill；
Mineral building stope under (2) one step back production obturations, direct back production to obturation bottom surface, after stope mining, dead zone
Two sides are the ore-rock of adjacent ore pillar stope, and top is obturation, and consolidated fill is carried out after the completion of ore removal；
Ore pillar stope under (3) two step back production obturations, does not disclose obturation bottom surface, under stay and set the ore-rock of certain altitude not
Back production, after stope mining, dead zone two sides are the cemented fill of adjacent mineral building stope, and top is ore-rock, after the completion of ore removal
Carry out non-cementing or consolidated fill；
(4) it does not stay after the stage ore body under the complete obturation of back production in a manner described and sets complete protolith level pillar, and only form
The less tooth form ore pillar of mine amount, the tooth form ore pillar are completed in normal large scale mining and then give back production in a manner of residual mine；
(5) the consolidated fill layer that obturation of upper stage bottom need to have certain thickness intensity to meet the requirements；
(6) above-mentioned step mineral building stope and two step ore pillar stopes select stage open stope afterwards filling method, sublevel open stoping afterwards
Filling method, Upward slicing or Upward drift back production.
2. mining methods under the according to claim 1 obturation for staying tooth form ore pillar, it is characterised in that: the step
(1) in two step stopes:
If arranging that stope, length of stope are 20~120m of orebody thickness perpendicular to orebody trend, Width of stope is 10~30m；
If arranging that stope, length of stope are 20~120m along orebody trend, Width of stope is 6~30m of orebody thickness, stope
Height is 30~150m.
3. mining methods under the according to claim 2 obturation for staying tooth form ore pillar, it is characterised in that: the step
(1) in, for especially thick big ore body, ore body is first divided into several panels, in each panel, along panel trend or
It moves towards to carry out stope division perpendicular to panel, length of stope is 60~120m, and Width of stope is 10~30m, and stope height is 30
~150m.
4. mining methods under the according to claim 1 obturation for staying tooth form ore pillar, it is characterised in that: the step
(4) in, finally formed tooth form ore pillar height is 3~20m.
5. mining methods under the according to claim 4 obturation for staying tooth form ore pillar, it is characterised in that: the step
(4) in, in the vertical cross-section along Width of stope direction, finally formed tooth form pillar shape includes rectangle or bottom surface is interior
The tooth form ore pillar of recessed dome-shaped, interior concave polygon.
6. mining methods under the according to claim 5 obturation for staying tooth form ore pillar, it is characterised in that: the indent
Polygon is indent triangle, indent quadrangle or indent hexagon.
7. mining methods under the according to claim 1 obturation for staying tooth form ore pillar, it is characterised in that: the step
(5) in, the uniaxial compressive strength of upper stage cemented fill bottom is not less than 1.2MPa, and the thickness of this layer is not less than 5m.
8. mining methods under the according to claim 1 obturation for staying tooth form ore pillar, it is characterised in that: the step
(2) in, when mineral building stope under a step back production obturation, obturation bottom surface is not disclosed, stays at the top of mineral building stope and sets necessity
The thickness of the mine wall of thickness, the mine wall cannot be greater than adjacent tooth form ore pillar thickness.
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| CN113187481A (en) * | 2021-05-28 | 2021-07-30 | 辽宁科技大学 | Filling mining method for overburden rock concentrated grouting caving stoping |
| CN113202553A (en) * | 2021-05-28 | 2021-08-03 | 鞍钢集团矿业有限公司 | Method for cementing and supporting roof pillar of ore room by upward filling mining method |
| CN113605971A (en) * | 2021-09-18 | 2021-11-05 | 中南大学 | Filling structure for preventing filling body from being unstable and mining method applying filling structure |
| CN113738416A (en) * | 2021-09-05 | 2021-12-03 | 湖北宜化江家墩矿业有限公司 | Method for improving recovery safety performance by preventing rib caving through reverse drawing of net piece |
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| CN110905510A (en) * | 2019-11-13 | 2020-03-24 | 铜陵有色金属集团股份有限公司 | Strip and block stoping method for horizontal ore pillar of metal ore body |
| CN110905510B (en) * | 2019-11-13 | 2021-06-08 | 铜陵有色金属集团股份有限公司 | Strip and block stoping method for horizontal ore pillar of metal ore body |
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| CN111088979A (en) * | 2019-12-03 | 2020-05-01 | 南华大学 | Downward access filling mining method |
| CN111088979B (en) * | 2019-12-03 | 2021-05-04 | 南华大学 | Downward access filling mining method |
| CN113187544A (en) * | 2021-05-28 | 2021-07-30 | 辽宁科技大学 | Large-scale underground dead zone treatment method of beam type roof structure |
| CN113187481A (en) * | 2021-05-28 | 2021-07-30 | 辽宁科技大学 | Filling mining method for overburden rock concentrated grouting caving stoping |
| CN113202553A (en) * | 2021-05-28 | 2021-08-03 | 鞍钢集团矿业有限公司 | Method for cementing and supporting roof pillar of ore room by upward filling mining method |
| CN113202553B (en) * | 2021-05-28 | 2024-01-12 | 鞍钢集团矿业有限公司 | Method for cementing and supporting roof column of ore room by upward filling mining method |
| CN113738416A (en) * | 2021-09-05 | 2021-12-03 | 湖北宜化江家墩矿业有限公司 | Method for improving recovery safety performance by preventing rib caving through reverse drawing of net piece |
| CN113738416B (en) * | 2021-09-05 | 2024-01-02 | 湖北宜化江家墩矿业有限公司 | Method for preventing ledge from improving recovery safety performance by reversely pulling net plate |
| CN113605971A (en) * | 2021-09-18 | 2021-11-05 | 中南大学 | Filling structure for preventing filling body from being unstable and mining method applying filling structure |
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