CN106703809B - A kind of method that open air trestle multi-branched ore body induction caving forms coating - Google Patents
A kind of method that open air trestle multi-branched ore body induction caving forms coating Download PDFInfo
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- CN106703809B CN106703809B CN201710028699.6A CN201710028699A CN106703809B CN 106703809 B CN106703809 B CN 106703809B CN 201710028699 A CN201710028699 A CN 201710028699A CN 106703809 B CN106703809 B CN 106703809B
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- Prior art keywords
- ore
- coating
- ore body
- goaf
- slump
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- 238000000576 coating method Methods 0.000 title claims abstract description 30
- 239000011248 coating agent Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000006698 induction Effects 0.000 title claims abstract description 10
- 239000011435 rock Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 230000011218 segmentation Effects 0.000 claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims description 2
- 230000003313 weakening effect Effects 0.000 claims description 2
- 238000010790 dilution Methods 0.000 abstract description 3
- 239000012895 dilution Substances 0.000 abstract description 3
- 238000007796 conventional method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 101100492787 Caenorhabditis elegans mai-1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/30—Methods of surface mining; Layouts therefor for ores, e.g. mining placers
Abstract
The invention discloses a kind of methods that open air trestle multi-branched ore body induction caving forms coating, it is characterized in that, in the exploitation of multi-branched ore body open air trestle application sublevel caving method, the extracting drift across pitch of each branch ore body is arranged, from top to bottom by segmenting cooperation back production, originally part broken ore is left as safe bed course, as back production segmentation moves down, in the continuous goaf of ribbon that vertical range direction forms exposed earth's surface, promote interlayer country rock with increase gradually unstability slabbing or the slump of two sides goaf surface area, slabbing or the barren rock of slump are piled up on broken ore.The present invention utilizes the emitting property self-assembling formation coating of country rock in ore exploitation process, compared with current avalanche side slope rock or backfill barren rock form the conventional method of coating, time and the expense to form coating can not only be saved, and the barren rock lumpiness of formed coating is larger, can effectively reduce the loss late and the rate of dilution of broken ore.
Description
Technical field
The present invention relates to metalliferous deposit underground mining technical field, specifically a kind of open air trestle multi-branched ore body induction
The method of inbreak formation coating.
Background technique
It is generally useless using avalanche side slope country rock or backfill at present in the metal mine of multi-branched ore body open air trestle exploitation
The conventional method of stone forms coating, these methods form the expensive of coating, and the rock fragmentation of formed coating
Smaller, during underground broken ore is released, coating barren rock flows faster mixed volume is big, causes mine loss and dilution big.
Therefore, multi-branched ore body open air trestle exploitation transitional period, because coating be artificially formed it is time-consuming it is expensive with and initially
The problems such as lumpiness small deterioration ore drawing effect, frequently result in that production capacity linking in mine is difficult to be reduced with mining benefit.For this purpose, inventing one kind
The method that open air trestle multi-branched ore body induction caving forms coating, enables coating self-assembling formation, and ensure covering
The lumpiness of layer barren rock is significant.
Summary of the invention
The purpose of the present invention is to provide a kind of open air trestle multi-branched ore body induction caving formed coating method,
To solve the critical issue in above-mentioned background technique.
To achieve the above object, the present invention provides the following technical solutions：
A kind of method that open air trestle multi-branched ore body induction caving forms coating, each branch ore body across pitch arrangement
Along the pulse extracting drift forms a plurality of band-like continuous goaf in vertical range direction, promotes interlayer country rock with two sides goaf table
The barren rock of the increase of area gradually unstability slabbing or slump, slabbing or slump is piled up on stope broken ore, forms covering
Layer.
As a further solution of the present invention：Along the pulse the extracting drift position leave the horizontal distance l of ore body lower wall by
Following formula determines：
In formula：α is the slanting angle of ore body, (°)；β is disk side angle of spot hole in back production blasthole, (°), β=55 °~60 °；H is segmentation
Highly, m；B is the horizontal breadth of ore body, m.
As a further solution of the present invention：Along the pulse extracting drift fan shaped medium length hole explosion back production, each step pitch
It is collapsed with upper segmentation, forms continuous goaf, promote two wall country rock slabbings or slump, be piled up in the remaining ore granular media of back production
On, coating needed for forming lower part body to be dug up mine.
As a further solution of the present invention：Back production depth H and length L need to meet following formula：
L≥10δ
In formula：α is the slanting angle of ore body, (°)；δ is thickness of interlayer, m；RtTension for the jointed rockmass after exploitation reduction is strong
Degree, t/m2, exploitation weakening coefficient is 0.21~0.56；ρ is the density of jointed rockmass, t/m3。
As a further solution of the present invention：Along the pulse until each step pitch ore removal of extracting drift to micro- dew goaf,
The not spacious sky of end mouth is kept, prevents impact harm caused by side wall country rock slabbing, while ore-rock interface level need to be kept to decline, control
It makes two wall country rocks and continues slabbing or slump, be piled up on the remaining ore granular media of back production, formed needed for the body to be dug up mine of lower part
Coating.
As a further solution of the present invention：When the goaf constitutes a threat to safely to back production, in goaf side wall
Country rock slabbing is formed before coating, need to be left from Roof of access road and be counted the safe bed course of ore that thickness is not less than 3m, avoid adopting
The impact harm that dead zone country rock slabbing or slump may cause.
Compared with prior art, the beneficial effects of the invention are as follows：The project amount that a large amount of worker forms coating is saved,
Using emitting property of country rock, the self-assembling formation coating in ore exploitation process can not only save mining time and expense, but also shape
At coating barren rock lumpiness it is larger, advantageously reduce its lower loss late and the rate of dilution of the ore during ore drawing.With the method
Formed coating, have many advantages, such as it is safe and efficient, environmentally friendly with it is at low cost.The present invention is especially suitable for high-dipping stratiform, like stratiform
Ore body, 50 °~80 ° of inclination angle, thickness of interlayer are less than the small area of 20m, rainfall or the convenient open air trestle exploitation of subdrainage
Metal mine.
Detailed description of the invention
Fig. 1 is the position view of extracting drift and branch's ore body along the pulse.
Fig. 2 is the cross-sectional view of A-A in Fig. 1.
Fig. 3 is the cross-sectional view of C-C in Fig. 1.
In figure：The 1- stage transports the tunnel Chuan Mai, 2- ramp, 3- segmentation tunnel, 4- segmentation connection lane, 5- downcast, 6- go back tos
Extracting drift, 9- cutting tunnel, 10- cut well, 11- back production blasthole along the pulse by ventilating shaft, 7- mine chute, 8-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~3, in the embodiment of the present invention, a kind of open air trestle multi-branched ore body induction caving forms covering
The method of layer, along orebody trend arrangement extracting drift 8 along the pulse, position need to meet fill sublevel caving and recycling ore and
Along orebody trend and the requirement for forming the continuous goaf of ribbon in deepening direction, route position leave ore body lower wall it is horizontal away from
From l by formulaIt determines.
Along the pulse cutting tunnel 9 is beaten in 8 end of extracting drift, cuts in tunnel 9 and beats cutting well 10, to cut well 10 as the scope of freedom
Form cutting groove.
Along the pulse the back production blasthole 11 in extracting drift 8 is no more than ore limits in principle, the same segmentation of multiple-limb ore body
Ore cooperates with back production using extracting drift 8 along the pulse, is forming the continuous goaf of ribbon along vertical range direction, is leaving
Two sides lose the interlayer country rock of support, with increase gradually unstability slabbing or the slump of two sides goaf surface area, slabbing or slump
Barren rock be piled up on broken ore granular media, ultimately form the coating of adequate thickness.
Ore along 8 back production avalanche of extracting drift along the pulse is transported to mine chute 7 by segmentation connection lane 4, through under mine chute 7
It is put into the stage transport tunnel Chuan Mai 1.
Each segmentation connection lane 4 is tunneled by being segmented tunnel 3；Couple between each segmentation tunnel 3 through ramp 2；It is fresh it is distinguished and admirable by into
Ventilating shaft 5 enters segmentation connection lane 4 and arrives each working face, and waste air is discharged to earth's surface by returnairshaft 6.
The process for stoping process being respectively segmented, identical as sublevel caving method without sill pillar, the ore of extraction can pass through underground haulage
System is transported, and dew exploitation field can also be transported to by measure footrill, is transported by upside-down mounting by open air transport system.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it should be understood that although this specification is described in terms of embodiments, but not each embodiment only includes an independence
Technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should make specification
For an entirety, the technical solutions in the various embodiments may also be suitably combined, formed it will be appreciated by those skilled in the art that
Other embodiments.
Claims (2)
1. a kind of method that open air trestle multi-branched ore body induction caving forms coating, which is characterized in that in multi-branched mine
In the exploitation of body open air trestle application sublevel caving method, the across pitch of extracting drift along the pulse of each branch ore body is arranged, from top to bottom
Promote interlayer country rock with two in the continuous goaf of ribbon that vertical range direction forms exposed earth's surface by segmenting cooperation back production
The barren rock of the increase of side goaf surface area gradually unstability slabbing or slump, slabbing or slump be piled up in stope broken ore it
On, self-assembling formation coating；Along the pulse the horizontal distance l that ore body lower wall is left in the extracting drift position is determined by following formula：
α is the slanting angle of ore body, (°) in formula；β is disk side angle of spot hole in back production blasthole, (°), β=55 °~60 °；H is height of lift,
m；B is the horizontal breadth of ore body, m；Along the pulse extracting drift fan shaped medium length hole explosion back production, each step pitch with upper segmentation
It collapses, forms continuous goaf, promote two wall country rock slabbings or slump, be piled up in the safe bed course of ore granular media left when back production
On, form the required coating of lower part body to be dug up mine.
2. the method that a kind of open air trestle multi-branched ore body induction caving according to claim 1 forms coating,
It is characterized in that, back production depth H and length L need to meet following formula：
L≥10δ；
α is the slanting angle of ore body, (°) in formula；δ is thickness of interlayer, m；RtFor the tensile strength of the jointed rockmass after exploitation reduction, t/m2,
Exploiting weakening coefficient is 0.21~0.56；ρ is the density of jointed rockmass, t/m3；Along the pulse each step pitch ore removal of extracting drift
Until micro- dew goaf, the not spacious sky of end mouth is kept；When goaf side wall country rock slabbing or slump activity are to stope
When safety constitutes a threat to, before forming coating, leaves from Roof of access road and counts the safe bed course of ore that thickness is not less than 3m,
The impact harm that may cause to avoid goaf country rock slabbing or slump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028699.6A CN106703809B (en) | 2017-01-16 | 2017-01-16 | A kind of method that open air trestle multi-branched ore body induction caving forms coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710028699.6A CN106703809B (en) | 2017-01-16 | 2017-01-16 | A kind of method that open air trestle multi-branched ore body induction caving forms coating |
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| Publication Number | Publication Date |
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| CN106703809A CN106703809A (en) | 2017-05-24 |
| CN106703809B true CN106703809B (en) | 2018-11-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108049870B (en) * | 2018-01-10 | 2019-03-29 | 鞍钢集团矿业有限公司 | The induction caving mining methods of high-dipping middle thickness orebody of the upper disk containing unstable rock stratum |
| CN109973091B (en) * | 2019-02-20 | 2021-08-24 | 北京昊华能源股份有限公司 | Coal mining method for multi-branch coal body |
| CN110017170B (en) * | 2019-04-09 | 2020-09-25 | 中国华冶科工集团有限公司 | Prevention and control method for underground ore mining ground pressure disaster |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU885556A1 (en) * | 1980-02-14 | 1981-11-30 | За витель ----0,4 | Method of stripping the working levels of a mine pit |
| RU2165018C2 (en) * | 1999-07-14 | 2001-04-10 | Акционерная компания "АЛРОСА" ЗАО | Method of combined mining of flooded mineral deposits |
| CN100535387C (en) * | 2005-05-23 | 2009-09-02 | 东北大学 | Improved sublevel caving method without bottom column |
| CN104806243B (en) * | 2015-03-09 | 2017-04-05 | 东北大学 | A kind of wedge shape switching transition method of open air trestle exploitation |
| CN104863591B (en) * | 2015-06-16 | 2017-12-08 | 东北大学 | Goaf controls inbreak and earth's surface filling administering method |
| CN105041315B (en) * | 2015-06-26 | 2017-06-23 | 东北大学 | A kind of open air trestle Wall ore adopts strata control method |
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