CN106121647A - Method for centralized recovery of lag pillars through fractional blasting - Google Patents
Method for centralized recovery of lag pillars through fractional blasting Download PDFInfo
- Publication number
- CN106121647A CN106121647A CN201610631963.0A CN201610631963A CN106121647A CN 106121647 A CN106121647 A CN 106121647A CN 201610631963 A CN201610631963 A CN 201610631963A CN 106121647 A CN106121647 A CN 106121647A
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- ore
- blasting
- segmentation
- rock drilling
- ore pillar
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- 238000005422 blasting Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000011084 recovery Methods 0.000 title claims description 13
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 30
- 230000011218 segmentation Effects 0.000 claims description 41
- 238000004880 explosion Methods 0.000 claims description 16
- 230000003111 delayed effect Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000005474 detonation Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 abstract description 2
- 238000010790 dilution Methods 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention provides a method for intensively recovering lagging pillars by fractional blasting, which is mainly characterized in that the recovered pillars are divided into four subsections in the height direction, a rock drilling tunnel is tunneled in the length direction of the pillars, a plurality of rock drilling cross tunnels vertical to the rock drilling tunnel are tunneled in the width direction, and the rock drilling cross tunnels penetrate through the pillars; arranging upward-divergent sector blasting blastholes with the cross section of the rock drilling cross drift as a circle center above the rock drilling cross drift, and using dead zones on two sides of an ore pillar as blasting free surfaces; firstly, blasting the highest subsection, taking the caving ore as a buffer layer, and temporarily not drawing ore; then, carrying out secondary blasting and blasting the rest of the segments at one time; and concentrating ore removal after blasting is finished. The ore buffer layer is formed firstly by caving the ore pillar by sections and times, the upper ore is blasted for the second time under the protection of the buffer layer, and potential safety hazards caused by large-scale ore caving and ore dilution caused by collapse of surrounding rocks of the upper and lower trays are avoided.
Description
Technical field
The invention belongs to open-stope method mining technique field, relate to a kind of method reclaiming stope pillar, be specifically related to one
Blasting in groups is initially formed the method for centralized recovery ore pillar after cushion.
Background technology
In open-stope method is dug up mine, stope being generally divided into mineral building and ore pillar, mineral building collection reclaims ore pillar after completing.But
In most of mine of China, in order to pursue economic benefits in short, after generally having reclaimed mineral building, ore pillar is left behind support
Goaf, lasting to deep mining along with mine, substantial amounts of delayed ore pillar will be left in top, causes the wasting of resources.
Summary of the invention
For defect of the prior art, the present invention provides a kind of ore pillar segmentation, blasting in groups, and blasting hole is reasonably distributed
Delayed ore pillar recovery method.
The present invention is achieved by the following technical solutions:
A kind of method of delayed ore pillar of blasting in groups centralized recovery, comprises the following steps:
A, segmentation: ore pillar, as a recovery unit, is marked off four segmentations, arrived from above by 2 ~ 3 ore pillars in the height direction
Under be followed successively by the first segmentation, the second segmentation, the 3rd segmentation and the 4th segmentation, height of lift 8 ~ 12m；
B, arrange blasting arrangement: in each segmentation bottom, ore pillar central authorities along ore pillar length direction tunnel a drilling drift, along ore deposit
Post width tunnels a plurality of rock drilling crosscut running through ore pillar, described drilling drift and described rock drilling crosscut square crossing, described
Drilling drift and described rock drilling crosscut are the arcuation hole that edge is arc, every rock drilling crosscut interval 10m ~ 15m；In rock drilling
The parallel above layout of lateral road organizes blasting hole more, and often organizing described big gun hole is the fan upwards dissipated for the center of circle with rock drilling crosscut cross section
Shape, utilizes dead zone, ore pillar both sides as the explosion scope of freedom；Blasthole diameter 80-100mm, bottom hole pitch 1.8m ~ 2.2m, trestle column 2.0m
~ 2.5m, can be different according to formation hardness, select suitable bottom hole pitch and trestle column；
C, blasting in groups: first the first segmentation described in explosion, broken ore, wouldn't ore removal as cushion；Then second is carried out
Separate explosion, the second segmentation, the 3rd segmentation and the 4th segmentation described in blasting in once-through；Explosion terminates rear concentrating mining.Blasting in groups
Avoiding the extensive avalanche of Ore, polycrystalline substance is damaged by upper segment Ore；Meanwhile, cushion can absorb a part of avalanche
The energy of Ore, it is to avoid produce air-shock wave and downhole production and personal security are impacted.
The preferable short-delay blasting of explosion for the second time, to increase the collision between Ore, forms Ore skyborne two
Secondary broken, it is possible to reduce the concussion of blasting impact on upper lower burrs surrounding rock stability.Another kind of optimal way is bottom-hole detonation technology,
Add the action time bombarding ripple, make rock more broken, decrease the generation of bulk.
This method have the beneficial effects that by several times avalanche ore pillar, be initially formed Ore cushion, under the protection of cushion the
Secondary blasting disposable avalanche top Ore, it is to avoid the air-shock wave that causes because of extensive broken ore, empty slope stability
The potential safety hazards such as destruction, concentrating mining after all Ores of avalanche, it is achieved that ore pillar is detained in safe efficient recovery.Owing to using
The Ore of first one segmentation of explosion forms cushion, and upper lower burrs country rock is defined certain supporting role, it is ensured that because ore deposit
After post recovery, upper lower burrs country rock collapses and causes ore dilution, therefore, can realize reclaiming 2 ~ 3 ore pillars simultaneously, improve ore pillar and return
The working performance received.
Accompanying drawing explanation
Ore pillar blasting arrangement generalized section in Fig. 1 the inventive method；
The side sectional view of ore pillar in Fig. 2 Fig. 1；
Reference: 1, ore pillar；2, the first segmentation；3, the second segmentation；4, the 3rd segmentation；5, the 4th segmentation；6, drilling drift；7、
Rock drilling crosscut；8, big gun hole；9, cushion.
Detailed description of the invention
Below by detailed description of the invention and combine accompanying drawing the present invention is expanded on further.
Recycle object is the delay ore pillar in the mined out mineral building of polymetallic ore of little Tie Shan mining area, Baiyin City, gansu Province, formation hardness
It is about 6-8.
(1) segmentation: by arteries and veins separate ventilation pedestrain raise, in the most mined out mineral building, select adjacent two ore pillar 1 as
One explosion unit, as it is shown in figure 1, from ore pillar 1 top, mark off four segmentations, each segmentation in the height direction at ore pillar 1
For 10m, it is followed successively by the first segmentation the 2, second segmentation the 3, the 3rd segmentation 4 and the 4th segmentation 5 from top to bottom.
(2) arrange blasting arrangement: as in figure 2 it is shown, in each segmentation lower end, ore pillar 1 central authorities along ore pillar 1 length direction tunnel
Article one, drilling drift 6, in drilling drift 6 position, tunnels one along ore pillar 1 width every 12m and is horizontally orientated to and passes through
Wear the rock drilling crosscut 7 of ore pillar, drilling drift 7 and rock drilling crosscut 7 square crossing, and be the arcuation hole that edge is arc.?
Every the position of 1m above rock drilling crosscut 7, rig is used to dig out the many groups of fans upwards dissipated with rock drilling crosscut 7 cross section for the center of circle
Shape blasting hole 8, often group big gun hole 8 is arranged in parallel, utilizes dead zone, ore pillar both sides as the explosion scope of freedom, blasthole diameter 90mm, hole
The end, is away from 1.8m, trestle column 2.5m.
(3) blasting in groups: first the first segmentation 1 described in explosion, broken ore, wouldn't ore removal as cushion 9；Then is carried out
Secondary blasting, uses short-delay blasting, blasting in once-through the second segmentation the 3, the 3rd segmentation 4 and the 4th segmentation 5；After explosion terminates
Concentrated by polycrystalline substance and broken ore is transported.
Blasting process safety, does not causes damage to upper lower burrs country rock, once reclaims two ore pillars.
Claims (4)
1. a method for the delayed ore pillar of blasting in groups centralized recovery, comprises the following steps:
A, segmentation: ore pillar (1), as a recovery unit, is marked off four segmentations, by upper by 2 ~ 3 ore pillars in the height direction
The first segmentation (2), the second segmentation (3), the 3rd segmentation (4) and the 4th segmentation (5) it is followed successively by under to；
B, arrange blasting arrangement: in each segmentation bottom, ore pillar (1) central authorities along ore pillar (1) length direction tunnel a rock drilling lane
Road (6), tunnels a plurality of rock drilling crosscut (7) running through ore pillar (1) along ore pillar (1) width, and described drilling drift (6) is with described
Rock drilling crosscut (7) square crossing, described drilling drift (6) and described rock drilling crosscut (7) are the arcuation hole that edge is arc,
Every rock drilling crosscut (7) interval 10m ~ 15m；Organizing blasting hole (8) in rock drilling lateral road (7) parallel above layout, often group is described more
Big gun hole is to be the sector that the center of circle upwards dissipates with rock drilling crosscut (7) cross section, utilizes ore pillar (1) dead zone, both sides as explosion freely
Face；
C, blasting in groups: first the first segmentation (2) described in explosion, broken ore, wouldn't ore removal as cushion (9)；Then enter
Row second time explosion, the second segmentation (3), the 3rd segmentation (4) and the 4th segmentation (5) described in blasting in once-through, explosion terminate after collection
Middle ore removal.
The method of a kind of delayed ore pillar of blasting in groups centralized recovery the most as claimed in claim 1, it is characterised in that: in step A
The height of described segmentation is 8 ~ 12m；A diameter of 80 ~ 100mm of big gun hole described in step B (8), bottom hole pitch is 1.8m ~ 2.2m, row
Spacing is 2.0m ~ 2.5m.
The method of a kind of delayed ore pillar of blasting in groups centralized recovery the most as claimed in claim 1, it is characterised in that: in step C
Described second time explosion uses short-delay blasting.
The method of a kind of delayed ore pillar of blasting in groups centralized recovery the most as claimed in claim 1, it is characterised in that: in step C
Described second time explosion uses bottom-hole detonation technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631963.0A CN106121647A (en) | 2016-08-04 | 2016-08-04 | Method for centralized recovery of lag pillars through fractional blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610631963.0A CN106121647A (en) | 2016-08-04 | 2016-08-04 | Method for centralized recovery of lag pillars through fractional blasting |
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| Publication Number | Publication Date |
|---|---|
| CN106121647A true CN106121647A (en) | 2016-11-16 |
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| CN201610631963.0A Pending CN106121647A (en) | 2016-08-04 | 2016-08-04 | Method for centralized recovery of lag pillars through fractional blasting |
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| CN (1) | CN106121647A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661638A (en) * | 2018-05-09 | 2018-10-16 | 中冶北方（大连）工程技术有限公司 | A kind of method of ring holes recycling ore pillar |
| CN111042062A (en) * | 2019-12-30 | 2020-04-21 | 中国水电基础局有限公司 | Grooving method for ultra-deep impervious wall |
| CN115839239A (en) * | 2022-12-16 | 2023-03-24 | 北京科技大学 | Method for reducing loss and dilution of non-pillar sublevel caving method by optimizing caving body morphology |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1456573A1 (en) * | 1987-06-01 | 1989-02-07 | Свердловский горный институт им.В.В.Вахрушева | Method of mining ore deposits |
| CN102619513A (en) * | 2012-03-26 | 2012-08-01 | 中南大学 | Room and pillar type medium-length hole filling mining method using bottom ore withdrawal structures simultaneously arranged in original rock |
| CN102808622A (en) * | 2012-08-03 | 2012-12-05 | 西北矿冶研究院 | Method for recovering ore pillar by medium-length hole and deep hole combined blasting technology |
| CN104405395A (en) * | 2014-11-24 | 2015-03-11 | 西北矿冶研究院 | Mining method for transition of underground ore body from open stope mining method to caving mining method |
| CN104847355A (en) * | 2015-05-15 | 2015-08-19 | 西北矿冶研究院 | Continuous mining method for hollow ground of medium-thickness steeply inclined ore body |
| CN104948190A (en) * | 2015-06-01 | 2015-09-30 | 西北矿冶研究院 | Method for caving top surrounding rock to form covering layer recovery stud |
| CN105201506A (en) * | 2015-09-06 | 2015-12-30 | 东北大学 | Ore mining method adopting reinforcement before connection and filling after connection |
-
2016
- 2016-08-04 CN CN201610631963.0A patent/CN106121647A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1456573A1 (en) * | 1987-06-01 | 1989-02-07 | Свердловский горный институт им.В.В.Вахрушева | Method of mining ore deposits |
| CN102619513A (en) * | 2012-03-26 | 2012-08-01 | 中南大学 | Room and pillar type medium-length hole filling mining method using bottom ore withdrawal structures simultaneously arranged in original rock |
| CN102808622A (en) * | 2012-08-03 | 2012-12-05 | 西北矿冶研究院 | Method for recovering ore pillar by medium-length hole and deep hole combined blasting technology |
| CN104405395A (en) * | 2014-11-24 | 2015-03-11 | 西北矿冶研究院 | Mining method for transition of underground ore body from open stope mining method to caving mining method |
| CN104847355A (en) * | 2015-05-15 | 2015-08-19 | 西北矿冶研究院 | Continuous mining method for hollow ground of medium-thickness steeply inclined ore body |
| CN104948190A (en) * | 2015-06-01 | 2015-09-30 | 西北矿冶研究院 | Method for caving top surrounding rock to form covering layer recovery stud |
| CN105201506A (en) * | 2015-09-06 | 2015-12-30 | 东北大学 | Ore mining method adopting reinforcement before connection and filling after connection |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661638A (en) * | 2018-05-09 | 2018-10-16 | 中冶北方（大连）工程技术有限公司 | A kind of method of ring holes recycling ore pillar |
| CN111042062A (en) * | 2019-12-30 | 2020-04-21 | 中国水电基础局有限公司 | Grooving method for ultra-deep impervious wall |
| CN115839239A (en) * | 2022-12-16 | 2023-03-24 | 北京科技大学 | Method for reducing loss and dilution of non-pillar sublevel caving method by optimizing caving body morphology |
| CN115839239B (en) * | 2022-12-16 | 2024-06-11 | 北京科技大学 | Method for reducing loss and dilution of bottomless column sublevel caving method by optimizing caving body shape |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161116 |
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| RJ01 | Rejection of invention patent application after publication |