CN109974545A - A kind of medium-length hole blasting outstanding top processing method in sublevel caving method - Google Patents
A kind of medium-length hole blasting outstanding top processing method in sublevel caving method Download PDFInfo
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- CN109974545A CN109974545A CN201910272685.8A CN201910272685A CN109974545A CN 109974545 A CN109974545 A CN 109974545A CN 201910272685 A CN201910272685 A CN 201910272685A CN 109974545 A CN109974545 A CN 109974545A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005422 blasting Methods 0.000 title claims abstract description 30
- 238000003672 processing method Methods 0.000 title claims abstract description 21
- 238000004880 explosion Methods 0.000 claims abstract description 21
- 230000000295 complement effect Effects 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims description 38
- 239000000843 powder Substances 0.000 claims description 9
- 238000005474 detonation Methods 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims 1
- 239000002360 explosive Substances 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000011017 operating method Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 15
- 238000012545 processing Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000037452 priming Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000020004 porter Nutrition 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 241000237509 Patinopecten sp. Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- General Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses the outstanding top processing methods of medium-length hole blasting in a kind of sublevel caving method, complement first encrypts blasthole between the normal blasthole row of two rows close to the region Xuan Ding, and blasthole, the first encryption blasthole and the second encryption blasthole are encrypted with the blasthole explosion together of the normal blasthole row of back segment in each complement second in outside of the normal blasthole row of the two rows.The present invention is a kind of outstanding top processing method of simple, safe and efficient, the reliable medium-length hole blasting of operating process, in the case where not influencing normal side and collapsing explosive broken, only need a small amount of vertical hole of complement that outstanding top problem can be solved as encryption blasthole, reduce the series of processes of new pick engineering and highly difficult construction hole location, effectively shortening outstanding top leads to claim for eot phenomenon, operating procedure is simple, and low to encryption blasthole hole location precision prescribed, easy to spread and application.
Description
Technical field
The invention belongs to mining technical fields, and in particular to a kind of outstanding top processing method of medium-length hole blasting.
Background technique
Sublevel caving method without sill pillar is most common mining technology in sublevel caving method, and this method is also amplified out novel
To all multi-methods such as mechanization medium-length hole stratified filling method, layering rock drilling afterwards filling methods on panel.But the essence of these methods
Feature is all the driving rock drilling route in ore body, then falls mine to fan shaped round blasting in rock drilling route and carries out back production
Method.
However, during stoping operation, sometimes because of the structural planes such as geology horizontal fault, drawing inaccuracy, or construction position
Inaccuracy is set, causing hole depth to design, not in place, position is not got in hole or powder charge is not in place, causes explosion that expected height is not achieved
There is top ore not by avalanche, forms outstanding top phenomenon in degree.
After outstanding top problem occurs, if not handling continuation back production, it will lead to stope and partition or stope mining height occur not
It is up to standard, it results in waste of resources and is caving risk at any time.If dealt with improperly, and it will lead to the increasing of subsequent processing difficulty, safety
The problems such as hidden trouble scope expansion, or even stop the actual mining of the stope.Therefore, how the outstanding top of processing of highly effective and safe is asked
It inscribes most important.
In outstanding top processing scheme, the most common processing mode is in the rock drilling route near the position Xuan Ding, to outstanding top
A row or multi-row slope fan medium-length hole is mended in region, one as disclosed in the Chinese patent application application No. is 201510248024.3
The method on the outstanding top of kind medium-length hole blasting processing, to hang the top/bottom part scope of freedom, using common continuous charging blasting technique tissue explosion.
Personnel safety when in actual operation, to guarantee perforations adding operation, slope fan medium-length hole position of opening can only be arranged in open wiring and lean on
The position of 3-4 row afterwards, this easily causes 3-4 row's medium-length hole in front to destroy, causes to perforate, and influences the arrangement of explosion section；And it is outstanding
A possibility that top hole region Nei Can is likely to also remain unexploded explosive, and slope fan medium-length hole penetrates residual hole, there are one
Fixed security risk.In addition, the perforations adding is the inclination blasthole of opposite low-angle, it is fixed to drilling machine to require height, and drilling machine is rushed
It is big to hit device damage.
On the basis of inclined hole treatment effect is poor, some new methods are also suggested, such as by digging in the area Xuan Ding two sides
Into the method for new route, then Drilling wide-angle inclined hole to the region Xuan Ding；But time-consuming for this method, increases a large amount of new works
Journey, processing cost are high.Also by double priming bombs in scallop hole, elementary errors, subsequent a few artillery salvo holes of successively detonating in row behind outstanding top
Mode, achieve the effect that gradually to caunch and complete to disappear to outstanding heights of roofs, such as application No. is 201810949704.1 China is special
A kind of disclosed blast processing method on the outstanding top in underground of benefit application.This mode by geological conditions and is hanged without newly-increased project amount
Heights of roofs etc. limitation, caunch height it is uncontrollable with required number of rows, and every separate explosion can only explosion tier hole, construct it is cumbersome,
Time-consuming, and ore losses amount is big.
Summary of the invention
Technical problem solved by the present invention is providing one kind for many drawbacks existing for the above outstanding top processing method
The outstanding top processing method of medium-length hole blasting in sublevel caving method.
The present invention adopts the following technical scheme that realization:
The outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method, it is characterised in that: close to the region Xuan Ding
Complement first encrypts blasthole between two rows of normal blasthole rows, and encrypts big gun in each complement second in outside of the normal blasthole row of the two rows
Hole, the first encryption blasthole and the second region for being distributed of encryption blasthole form encrypted area, the first encryption blasthole and the
Two encryption blastholes are with the normal artillery salvo hole of a wherein row in encrypted area with section explosion.
Step 1: position and the height in the actual measurement region Xuan Ding, determine that heel row blasthole destroys situation, open wiring destroys situation；
Step 2: choosing two rows of normal blasthole rows in the region Xuan Ding according to step 1, arranged in two rows of normal blastholes
Between setting-out first encrypt blasthole, and two rows normally the exclusive side of blasthole respectively add the second encryption blasthole；
Step 3: according to all encryption blastholes of layout point position Drilling；
Step 4: after encryption blasthole Drilling, to normal artillery salvo hole and encryption blast hole projectile filling；
Step 5: carrying out on line, detonation work after all blast hole projectile fillings.
Further, setting 1-3 is retained in the step 2, between the region Xuan Ding and immediate encryption blasthole to arrange
Normal blasthole row.
Further, the first encryption blasthole is arranged between normal blasthole row along the direction for being parallel to normal blasthole row
2-3 row, single hole count are 4-6.
Further, single, hole count 3-5 is arranged along the direction for being parallel to normal blasthole row in the second encryption blasthole
It is a, it is uniformly distributed between all encryption blastholes.
Further, in the step 3, the aperture of the encryption blasthole is greater than the aperture in normal artillery salvo hole.
Further, for the encryption blasthole to vertical parallel hole on, drilling depth pushes up area top certainly to outstanding
Retain the vertical range of 0.5m-1m by face.
Further, in the step 4, normal artillery salvo hole powder charge by the way of sublevel caving method setting is described
It encrypts blasthole and uses continuous charging structure, powder charge encrypts the internal charge section of blasthole to the lower part Xuan Ding scope of freedom horizontal line position
Overall length is laid with primacord.
Further, in the step 5, the 1-3 retained between the region Xuan Ding and encrypted area arranges normal blasthole row first
Detonation, the interior 2-3 section of the normal blasthole row of the 1-3 row row of being all made of, which is formed, arranges interior short-delay blasting, and the time of delaying after row is elongated to
75ms or more.
Further, all encryption blastholes use the blasting cap initiation of identical section, encrypt section selected by blasthole not
The heel row section for the normal blasthole row of two rows for determining that encryption blasthole ranking is set can be later than.
The beneficial effects of the invention are that:
(1) after outstanding top problem occurs in mining area, in the case where not influencing normal side and collapsing explosive broken, only need complement vertical on a small quantity
Outstanding top problem can be solved as encryption blasthole in hole.The identical section explosion of blasthole is encrypted, forms multiple column charings loosely
Porous spherical pack form；This blasting from by livingston explosive funnel it is theoretical based on, using multiple intensive parallel
Deep hole detonates simultaneously, so that the explosion energy of explosive in each blasthole is generated stress wave overlapping and intersects, synthesizes a common stress field,
Stress wave peak action increases in the time of rock, momentum increases, effective range becomes wide, and such porous spherical pack is equivalent
In the blast action of a larger diameter blasthole, but explosion energy distribution is more uniform, and demolition effect is more preferable.It encrypts in hole and detonates
Pack is inserted on a strip powder stick with 1 primacord by single-shot Nonel detonator and is made, and this priming is packed
To encryption hole bottom hole, then continuous charging to the lower part Xuan Ding scope of freedom horizontal line position.This technique reduce new pick engineering with
The series of processes of highly difficult construction hole location, effectively shortening outstanding top leads to claim for eot phenomenon.
(2) encryption blasthole all uses continuous charging and loaded length corresponds to the height in the region Xuan Ding, and explosive payload is few.It is all to add
Close blasthole uses same section, and charge process is simple, easy to spread and application, and low to encryption blasthole hole location precision prescribed, only
It need to be uniformly distributed in encrypted area, thus, it is easy to drilling construction.
(3) encryption blasthole section arranges heel row section no more than normal blasthole is encrypted, in this way can be to avoid close blasthole section
The too big caused phenomenon of miss-firing of difference.
(4) it stays 1-3 to arrange normal blasthole row between the encrypted area and the region Xuan Ding of encryption blasthole formation, on the one hand guarantees to add
The safety of Mi Qu drilling and powder charge construction；In addition, these normal blasthole rows add interval mode of delaying greatly between arranging, it can be to outstanding top
Nearby play the role of finishing, caunch.
(5) inclined hole is beaten to the region Xuan Ding compared to traditional, The method avoids perforated tapes during drilling to come by the present invention
A system risk, avoid and play precise positioning requirement of the low-angle inclined hole to blasthole, reduce the damage to drilling machine, and will bore
Hole cost is substantially reduced with the period.
In conclusion the present invention is that a kind of simple, safe and efficient, the reliable medium-length hole blasting of operating process hangs top processing
The case where method has the scope of freedom in top particularly suitable for outstanding top, and outstanding heights of roofs is less than 6m.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Detailed description of the invention
Fig. 1 is the steel for shot top view in the outstanding top processing method of medium-length hole blasting of embodiment.
Fig. 2 is the steel for shot sectional view in the outstanding top processing method of medium-length hole blasting of embodiment.
Fig. 3 is the explosion section layout viewing of embodiment.
Figure label:
Figure label: the region 1- Xuan Ding, the outstanding top open wiring of 11-, the lower part 12- Xuan Ding, the outstanding top lower horizontal extended line of 13-；
The normal blasthole row of 2-, the normal artillery salvo hole 20-, the first blasthole is arranged after 21- hangs top, the second blasthole row behind the outstanding top 22-,
Third blasthole is arranged behind the outstanding top 23-, and the 4th blasthole is arranged behind the outstanding top 24-；
31- first encrypts blasthole, and 32- second encrypts blasthole, and 33- encrypts blasthole explosive section；
41- upper segment rock drilling route, 42- rock drilling route.
Specific embodiment
Embodiment 1
Referring to Fig. 1 and Fig. 2, the steel for shot figure in diagram is that the present invention falls the raw outstanding top phenomenon of mineral products to sublevel caving method
Explosion treatment mode.In the sublevel caving method, use upward drilling trolley to top ore body in ore body rock drilling route 42
To vertical parallel hole on drilling through, by the arrangement blasthole Drilling of all explosion sections after, to wherein certain block region mine
Body explosion produces the region Xuan Ding 1 when falling mine.
The method that the present embodiment solves the region Xuan Ding 1 is mended between the normal blasthole row 2 of two rows close to the region Xuan Ding 1
The first encryption blasthole 31 is made a call to, and encrypts blasthole 32 in each complement second in outside of the normal blasthole row 2 of the two rows, in encryption blasthole drilling
After chisel, according between the bottom plate of upper segment rock drilling route 41 and the outstanding top lower horizontal extended line 13 of the lower part Xuan Ding 12
Difference in height, this section of interregional installation explosive in encryption blasthole, by the first encryption blasthole 31 and the second encryption big gun after powder charge
The blasthole explosion together that hole 32 is arranged with the normal blasthole on the segmentation ore body.The explosion together herein referred to refers to quick-fried in same segmentation
It is broken, be not explosion simultaneously, below can the blasting sequence of normal artillery salvo hole intracorporal to same section mine and encryption blasthole carry out in detail
Explanation.
Specific construction procedure is as follows.
Step 1: the position height of the lower part Xuan Ding 12 in the measurement region Xuan Ding 1, investigates position and the Xuan Ding of outstanding top open wiring 11
The destruction situation of rock drilling Roof of access road above and below the back segment of region.
Step 2: the case where according to step 1, determine the center of the first encryption blasthole 31 close to the region Xuan Ding 1
The normal blasthole of second row is arranged and third is arranged between normal blasthole row, i.e., the second blasthole is arranged 22 and hanged behind outstanding top in fig. 1 and 2
Carry out the first encryption blasthole 31 behind top between third blasthole row 23 adds setting-out, the first encryption blasthole 31 setting two between arranging
Row, the direction along normal blasthole row are arranged in parallel, and every round number is 4-6；Then the second blasthole arranges 22 and Xuan Ding behind outstanding top
Setting-out one is respectively added between the 4th blasthole row 24 behind third blasthole row 23 and outstanding top behind between the first blasthole row 21 and outstanding top afterwards
It ranked second encryption blasthole 32, hole count is 3-5.Blasthole is encrypted according to the hole location in neighbouring normal artillery salvo hole 20, can have and slightly adjust
It is whole, but it should being uniformly distributed adjacent encryption blasthole equidistantly in the encrypted area of formation.
Step 3: according to layout point position, using mode identical with normal artillery salvo hole, from the top plate of rock drilling route 42 to
Upper all encryption blastholes of Drilling.The aperture of all encryption blastholes is all larger than the aperture in normal artillery salvo hole 20, and encryption blasthole is upper
To vertical parallel hole, encrypts blasthole and do not punch ore body in drilling process, the drilling depth of control encryption blasthole to top
The bottom plate of sublevel drilling route 41 retains the distance of 0.5m-1m, that is, is equivalent to the bottom hole (top) of encryption blasthole positioned at outstanding
Push up 0.5m-1m below the top scope of freedom in region 1.
Step 4: adding respectively to normal artillery salvo hole 20 and the first encryption blasthole 31 and second after encryption blasthole Drilling
Close 32 powder charge of blasthole.Wherein, primacord is laid with by grug transportation tube in normal artillery salvo hole 20, then using continuous charging mode extremely from
The aperture position 3.0-4.0m, is then sent into igniting primer by grug transportation tube, further fills explosive to from aperture 1.0-2.5m's
Position；Finally blocked in aperture using stemming or simple material.For the first encryption blasthole 31 and the second encryption blasthole 32, will lead
Quick-fried rope length is machined to rise that angle value is identical with outstanding, and the primacord of a hair Nonel detonator and certain length is then inserted into item
In shaped explosive charge (or priming bomb), it is made as igniting primer, igniting primer is sent by grug transportation tube to encryption blasthole bottom hole, is then filled
Explosive is filled out to the position of outstanding top lower horizontal extended line 13, guarantee the height in the corresponding region Xuan Ding 1 of encryption blasthole explosive section 33 away from
From.
Step 5: carrying out on line, detonation work after all blast hole projectile fillings.The section that detonates is as shown in Figure 3, hangs top
The first blasthole row 21 is detonated first afterwards, section using plain detonator most to start 2-3 section other, when specially 1-3#, 1# extension
Between be 0ms, the time of delaying between section is 25ms.Second blasthole row, 22 starting sections behind outstanding top are set as 6# or more, with behind outstanding top the
The extension time is elongated to 75ms or more between one blasthole arranges 21 rows, and the first blasthole row 21 repairs to top area peripheral edge is hanged after guaranteeing outstanding top
Whole effect.
The second blasthole row 22 equally selects 2-3 section other behind outstanding top, successively arranges from center to two sides.Third big gun behind outstanding top
22 sections of the second blasthole row behind outstanding top of hole row 23 is other on continuing, and is not arranged using 2-3 section equally.
The section of encryption blasthole Cai Yong not hang the last one section of the second blasthole row 22 behind top not or it is outstanding push up after third blasthole row
23 section of foremost one is other.Section not determine after, all encryption blastholes use same section do not detonate.
Due to equally having the second encryption shot hole blasting between the 4th blasthole row 24 behind third blasthole row 23 behind outstanding top and outstanding top,
It is on the basis of 23 sections of third blasthole row is other behind outstanding top, 2-3 section after the arbitrarily selection of the 4th blasthole row 24 behind outstanding top is other
Carry out powder charge, on the basis of eliminating outstanding top, guarantee the smooth of the last dead zone boundary of explosion and open wiring, be conducive to subsequent ore removal with it is quick-fried
Broken operation.
After all blast hole projectile fillings, after all detonator payment to a porter in aperture are linked together, carry out work of clearing out a gathering place,
And the payment to a porter of all blasthole Nonel detonators is connected to initiation net, it detonates after confirmation line is errorless.Particularly with regard to
The initiation control of detonator is explosion common technology, and this will not be repeated here for the present embodiment.
All normal artillery salvo holes 20 in the present embodiment are all made of the up-hole of DL331 type drill jumbo Drilling rock, institute
Having the normal artillery salvo hole 20 accomplished fluently in advance is to punch always from the top plate of rock drilling route 42 to upper segment rock drilling route 41
Bottom plate, blasthole diameter 64mm, hole depth determine 10m according to stope design height, and blasthole array pitch is 1.7-2.1m according to lithology.First
76mm is selected as in the aperture of encryption blasthole 31 and the second encryption blasthole 32, encryption blasthole be equally all on to vertical parallel big gun
Hole, parallel with normal artillery salvo hole 20, Drilling mode is identical as normal artillery salvo hole 20, but does not punch ore body, encrypts blasthole Drilling
Blasthole bottom keep away from the 1 top scope of freedom of the region Xuan Ding (i.e. the bottom plate of upper segment rock drilling route 41) 0.5-1m.Blaster
Material uses powdery titania-mica, common Nonel detonator and primacord, and explosive is sent with delivery pipe to blasthole by explosive loader to be referred to
Positioning is set, and aperture is blocked using stemming or easy material.
Blast working, effect are equally carried out in the stope of certain underground mine sublevel drilling afterwards filling method using the above method
Show that explosion has reached outstanding the expected of top processing and required, has been reduced to 3 days, has been avoided by 15 days of conventional method construction period
Construction period is delayed, and enormously simplifies process flow and operation level, avoids additional big cost input, and substantially reduce
Security risk caused by traditional treatment method.
It should be clear that described above is only the embodiment of the present invention, it is not intended to limit the invention, it is all
Within technical solution of the present invention and principle, changes, equivalent replacement, improvement etc., belong to protection of the present invention
Within the scope of.
Claims (10)
1. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method, it is characterised in that: close to the two of the region Xuan Ding
It arranges complement first between normal blasthole row and encrypts blasthole, and encrypt big gun in each complement second in outside of the normal blasthole row of the two rows
Hole, the first encryption blasthole and the second region for being distributed of encryption blasthole form encrypted area, the first encryption blasthole and the
Two encryption blastholes are with the normal artillery salvo hole of a wherein row in encrypted area with section explosion.
2. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 1, specifically include as
Lower step:
Step 1: position and the height in the actual measurement region Xuan Ding, determine that heel row blasthole destroys situation, open wiring destroys situation；
Step 2: two rows of normal blasthole rows are being chosen in the region Xuan Ding according to step 1, between two rows of normal blasthole rows
Setting-out first encrypts blasthole, and respectively adds the second encryption blasthole in the normal exclusive side of blasthole of the two rows,；
Step 3: according to all encryption blastholes of layout point position Drilling；
Step 4: after encryption blasthole Drilling, to normal artillery salvo hole and encryption blast hole projectile filling；
Step 5: carrying out on line, detonation work after all blast hole projectile fillings.
3. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 2, the step 2
In, setting 1-3 is retained between the region Xuan Ding and immediate encryption blasthole and arranges normal blasthole row.
4. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 3, described first adds
For close blasthole along the direction arrangement 2-3 row for being parallel to normal blasthole row between normal blasthole row, single hole count is 4-6.
5. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 4, described second adds
Close blasthole is single along the direction setting for being parallel to normal blasthole row, and hole count is 3-5, is uniformly distributed between all encryption blastholes.
6. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 2, the step 3
In, the aperture of the encryption blasthole is greater than the aperture in normal artillery salvo hole.
7. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 6, the encryption big gun
To vertical parallel hole on, drilling depth retains the vertical range of 0.5m-1m to the outstanding top area top scope of freedom in hole.
8. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 2, the step 4
In, normal artillery salvo hole powder charge by the way of sublevel caving method setting, the encryption blasthole uses continuous charging structure, dress
For medicine to the lower part Xuan Ding scope of freedom horizontal line position, the internal charge section overall length for encrypting blasthole is laid with primacord.
9. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 3, the step 5
In, the 1-3 retained between the region Xuan Ding and encrypted area arranges normal blasthole row and first detonates, which arranges normal blasthole and be all made of
2-3 section, which is formed, in row arranges interior short-delay blasting, and the time of delaying after row is elongated to 75ms or more.
10. the outstanding top processing method of medium-length hole blasting in a kind of sublevel caving method according to claim 9, all encryptions
Blasthole uses the blasting cap initiation of identical section, and determining encryption blasthole ranking is set two cannot be later than by encrypting section selected by blasthole
Arrange the heel row section of normal blasthole row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910272685.8A CN109974545B (en) | 2019-04-04 | 2019-04-04 | Medium-length hole blasting suspended roof processing method in sublevel caving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910272685.8A CN109974545B (en) | 2019-04-04 | 2019-04-04 | Medium-length hole blasting suspended roof processing method in sublevel caving method |
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| CN109974545A true CN109974545A (en) | 2019-07-05 |
| CN109974545B CN109974545B (en) | 2020-05-19 |
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| CN201910272685.8A Expired - Fee Related CN109974545B (en) | 2019-04-04 | 2019-04-04 | Medium-length hole blasting suspended roof processing method in sublevel caving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749693A (en) * | 2020-06-28 | 2020-10-09 | 玉溪大红山矿业有限公司 | Deep hole construction and blockage treatment method in large fault section by non-bottom-pillar sublevel caving method |
| CN113605895A (en) * | 2021-09-15 | 2021-11-05 | 长沙矿山研究院有限责任公司 | Safe and efficient mining method for sectional medium-length hole stope |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749693A (en) * | 2020-06-28 | 2020-10-09 | 玉溪大红山矿业有限公司 | Deep hole construction and blockage treatment method in large fault section by non-bottom-pillar sublevel caving method |
| CN111749693B (en) * | 2020-06-28 | 2022-05-20 | 玉溪大红山矿业有限公司 | Method for constructing and blocking deep hole in large fault section by sill pillar-free sublevel caving method |
| CN113605895A (en) * | 2021-09-15 | 2021-11-05 | 长沙矿山研究院有限责任公司 | Safe and efficient mining method for sectional medium-length hole stope |
| CN113605895B (en) * | 2021-09-15 | 2022-11-04 | 长沙矿山研究院有限责任公司 | Safe and efficient mining method for sectional medium-length hole stope |
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| CN109974545B (en) | 2020-05-19 |
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