CN107525443A - The explosion method of ignition of fan shaped medium length hole - Google Patents
The explosion method of ignition of fan shaped medium length hole Download PDFInfo
- Publication number
- CN107525443A CN107525443A CN201610442132.9A CN201610442132A CN107525443A CN 107525443 A CN107525443 A CN 107525443A CN 201610442132 A CN201610442132 A CN 201610442132A CN 107525443 A CN107525443 A CN 107525443A
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- groups
- explosion
- blasthole
- detonator
- ignition
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Classifications
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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
- F42D1/10—Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure
-
- 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
Abstract
The present invention provides a kind of explosion method of ignition of fan shaped medium length hole.The method comprising the steps of：Blasthole with row is divided into two groups, is A groups positioned at middle 1/3rd most deep blastholes, remaining blasthole for being located at both sides is B groups；Allow A group blastholes first to be detonated during explosion, detonated after B group blastholes.Each blasthole in described A groups sequentially installs the low section of not high-precision detonator at 25 milliseconds of interval respectively, each blasthole sequentially installs the not high-precision detonator of high section at 25 milliseconds of interval respectively in described B groups, while detonator section maximum in A groups does not keep 300 350 milliseconds of delay with detonator section minimum in B groups between other.The energy that the present invention has made full use of explosive charge to discharge carrys out broken rock acting, improves the Rock fragmentation after explosion, improves ore recovery ratio, while reduce the secondary harm of explosion.
Description
Technical field：
The present invention relates to a kind of explosion method of ignition of fan shaped medium length hole, belong to underground mining technical field.
Background technology：
It is a very important link in whole mining technology that underground mining borehole blasting, which falls ore deposit, after on the one hand ensureing explosion
Rock fragmentation meets design requirement, the basis created for follow-up ore removal Resource recovery link；On the other hand to make full use of fried
The energy of medicine blast release carrys out broken rock acting, secondary harm is reduced, such as destruction of the shock wave to underground site facility, seismic wave pair
Infringement of earth's surface construction of structures etc..Using the mine of sublevel caving method without sill pillar, mode that explosion falls ore deposit be on it is deep into sector
Hole high bunch continuous method, is characterized in：When implementing explosion, it is contemplated that the explosive charge of maximum one section of explosion, generally will often arrange 8-
11 blastholes are divided into two groups, and middle 3-4 deeper Kong Weiyi group, other holes are that blasthole installs same section thunder in another group, every group
Manage, tripping 1-2 sections between group, realize with row's segment blast.Weak point using this detonation mode is：It is divided into one group
Between deeper several holes due to the explosive charge of no segmentation, one section of explosion it is still larger, extruding was also easy to produce after explosion, unfavorable was put
Ore deposit, at the same underground shock wave caused by explosion and be delivered to ground seismic wave negative effect it is very big；Only divide with explosive broken detonation
Two sections, the chance extruded in blasting process is few, the ore fragmentation otherness after explosion is big.
The content of the invention
The purpose of the present invention is to provide a kind of explosion method of ignition of fan shaped medium length hole for above-mentioned problem, fully
The energy for making good use of explosive charge release carrys out broken rock acting, improves the Rock fragmentation after explosion, improves ore recovery ratio, subtract simultaneously
The secondary harm of few explosion.
Above-mentioned purpose is achieved through the following technical solutions：
The explosion method of ignition of fan shaped medium length hole, this method are：Blasthole with row will be divided into two groups, positioned at middle most deep three points
One of blasthole be A groups, remaining blasthole for being located at both sides is B groups；A group blastholes are allowed first to be detonated during explosion, after B group blastholes
Detonation.
The explosion method of ignition of described fan shaped medium length hole, each blasthole in described A groups sequentially install interval respectively
25 milliseconds of low section of not high-precision detonator, in described B groups each blasthole sequentially install respectively 25 milliseconds of interval high section it is not high
Smart detonator.
The explosion method of ignition of described fan shaped medium length hole, the maximum detonator section of blasthole is not interior most with B groups in described A groups
The delay of 300-350 milliseconds is kept between small detonator section is other.
Beneficial effect：
The present invention realize it is upper to fan shaped medium length hole with it is explosive broken when, using long delay packet detonation, short millisecond detonating between group
Method, the mechanism of tight-face blasting is optimized, improve the rock breaking efficiency of tight-face blasting, add the recovery of ore, simultaneously
Significantly reduce the secondary harm of air-shock wave caused by explosion and seismic wave etc..
Brief description of the drawings
Fig. 1 is to be grouped detonation schematic diagram to fan shaped medium length hole long delay on single.
Reference numerals list：
1-A group blastholes；2-B group blastholes；3- fan shaped medium length holes；4- stratified minings tunnel.
Embodiment
With reference to embodiment, the present invention is furture elucidated, it should be understood that following embodiments are only used for
The bright present invention rather than limitation the scope of the present invention.
A kind of explosion method of ignition of fan shaped medium length hole, this method are：Blasthole with row is divided into two groups, positioned at centre most
/ 3rd deep blastholes are A groups, and remaining blasthole for being located at both sides is B groups；A group blastholes are allowed first to be detonated during explosion, B
Detonated after group blasthole.
The explosion method of ignition of fan shaped medium length hole described in the present embodiment, each blasthole in described A groups are suitable respectively
Sequence installs 25 milliseconds of the low section of not high-precision detonator in interval, and each blasthole sequentially installs 25 milliseconds of interval respectively in described B groups
The not high-precision detonator of high section, while detonator section maximum in A groups not with detonator section minimum in B groups it is other between keep 300-350
The delay of millisecond.
According to downhole production handling situations, with reference to field application reality and the drawings and specific embodiments, further elucidate
This patent.
By on every 9 holes of row to exemplified by fanhole(s), as shown in figure 1,90 ° of face inclination angle of row, three center rock drilling, hole count 9
It is individual, blasthole diameter 91mm, array pitch 2.4m, 11.5 ~ 25m of blast hole depth, row's linear meter(lin.m.) number 150m；Using emulsification ANFO explosives prill,
Degree of packing ρ=1.0g/cm3, Ao Ruikai High-precision Detonator hole-bottom blasts.
In daily specific implementation explosion, will often arrange（Fig. 1）9 holes（1）Middle most deep three holes（3）It is divided into A groups（3）,
Six holes of other both sides（4）It is divided into B groups；A groups（3）In be initially charged with containing 1# sections 25ms in most deep hole（2）The detonation of detonator
Pack, explosive is then loaded, be then initially charged with respectively in the hole of its both sides containing 2# sections 50ms（2）Detonator, 3# sections 75ms（2）
The igniting primer of detonator simultaneously loads explosive；A groups（3）After installing, start to fill B groups（4）Six holes（4）, it is first most deep on right side
Load in hole and contain 15# sections 375ms（2）Detonator simultaneously loads explosive, then loads in the most deep hole in left side and contain 16# sections 400ms（2）
Detonator simultaneously loads explosive, then continues to the 17# sections 425ms for alternately loading interval 25ms in the side opening of left and right（2）, 18# sections 450ms
（2）, 19# sections 475ms（2）, 20# sections 500ms（2）Detonator simultaneously loads explosive, completes detonator, the dynamite charge of single whole blastholes
Operation.It is exactly then initiation net connection outside conventional hole, in the ignition and detonation of stipulated time.
Iron ore uses this method of ignition since the -288m slicings in experiment, back production key operation at present -303m, -
Two layerings of 318m.In daily implementation explosion, 1# sections are respectively charged into middle most deep three holes（25ms）, 2# sections（50ms）、
3# sections（75ms）Detonator and filling explosive, then significantly jump 12 sections（Be delayed 300ms）15# is respectively charged into other 6 holes
Section（375ms）, 16# sections（400ms）, 17# sections（425ms）, 18# sections（450ms）, 19# sections（475ms）, 20# sections（500ms）Thunder
Pipe and filling explosive, 9 hole dynamite charges couple initiation net after terminating, in the stipulated time（Thirty every afternoon 3）Light a fire
It is quick-fried.
Using this method of ignition, year 1646 row of blasting hole row, 362.18 ten thousand tons of rock yield, ore recovery ratio is brought up to
85.61%, compared to using the ore recovery ratio 80.44% before this method of ignition, 5.17 percentage points are improved, reclaims ore more
18.72 ten thousand tons.
Monitored in experiment using concussion of blasting caused by this blasting method, and with the method for ignition traditional before
Monitor that concussion of blasting data are contrasted.
The point position of contrastive detection arrangement is identical with former point position, and blow-up point is -288 horizontal northern 13 routes of 2-3 connection,
Test result such as table 1 below.
The blast monitoring data record of table 1
The data for the monitoring of blasting vibration that traditional method of ignition is carried out are compared with above test result before being selected in experiment.Mirror
In with the passing of time, underground production site also changes, selection and the quick-fried source center of this monitoring of blasting vibration in experiment
Before relative close（- 273mN11 routes）The data of traditional method of ignition are compared, and are shown in Table 2.
2 two kinds of method of ignition explosion shock dropping comparison sheets of table
It can be seen from upper table, 50% is reduced with traditional method of ignition before using vibrations caused by this patent method of ignition
Left and right, concussion of blasting have obtained significantly reducing.
This patent method of ignition through overtesting, improve on the underground mine using bottom-column-free sectional caving stoping method to
The demolition effect of fan shaped medium length hole, adds the recovery of ore, while significantly reduces explosion and produce seismic wave, air-shock wave
Deng secondary harm, beneficial effect is very notable.
Claims (3)
1. a kind of explosion method of ignition of fan shaped medium length hole, it is characterized in that：This method is：Blasthole with row is divided into two groups, position
It is A groups in middle 1/3rd most deep blastholes, remaining blasthole for being located at both sides is B groups；Allow A group blastholes during explosion
First detonate, detonated after B group blastholes.
2. the explosion method of ignition of fan shaped medium length hole according to claim 1, it is characterized in that：It is each in described A groups
Blasthole sequentially installs 25 milliseconds of the low section of not high-precision detonator in interval respectively, and each blasthole is sequentially installed respectively in described B groups
The not high-precision detonator of high section at 25 milliseconds of interval.
3. the explosion method of ignition of fan shaped medium length hole according to claim 1 or 2, it is characterized in that：Blasthole in described A groups
Maximum detonator section does not keep the delay of 300-350 milliseconds with detonator section minimum in B groups between other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610442132.9A CN107525443A (en) | 2016-06-20 | 2016-06-20 | The explosion method of ignition of fan shaped medium length hole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610442132.9A CN107525443A (en) | 2016-06-20 | 2016-06-20 | The explosion method of ignition of fan shaped medium length hole |
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| CN201610442132.9A Pending CN107525443A (en) | 2016-06-20 | 2016-06-20 | The explosion method of ignition of fan shaped medium length hole |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413822A (en) * | 2018-04-12 | 2018-08-17 | 长沙矿山研究院有限责任公司 | To fan shaped medium length hole Shock reducing blasting method in one kind |
| CN110926285A (en) * | 2019-12-10 | 2020-03-27 | 北京科技大学 | Method for reducing lump size of ore for sublevel caving mining without sill pillar |
| CN111023928A (en) * | 2019-12-10 | 2020-04-17 | 北京科技大学 | Method for improving ore dropping efficiency without bottom pillar |
| CN113465462A (en) * | 2021-05-07 | 2021-10-01 | 北京科技大学 | Mining method for eliminating sublevel caving mining suspended roof without sill pillar |
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| US4603910A (en) * | 1983-03-23 | 1986-08-05 | Jcc Construction Company Ab | Method of blasting rock caverns with large cross-sectional area |
| RU2007134129A (en) * | 2007-09-12 | 2009-03-20 | Открытое акционерное общество "Апатит" (ОАО "Апатит") (RU) | METHOD FOR DEVELOPING A POWERFUL ORE DEPOSIT |
| CN101737050A (en) * | 2008-11-25 | 2010-06-16 | 宝钢集团上海梅山有限公司 | Deep hole arranging method in mining |
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| CN104154830A (en) * | 2014-08-08 | 2014-11-19 | 西北矿冶研究院 | Medium-length hole blasting method for underground mining |
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| US4603910A (en) * | 1983-03-23 | 1986-08-05 | Jcc Construction Company Ab | Method of blasting rock caverns with large cross-sectional area |
| RU2007134129A (en) * | 2007-09-12 | 2009-03-20 | Открытое акционерное общество "Апатит" (ОАО "Апатит") (RU) | METHOD FOR DEVELOPING A POWERFUL ORE DEPOSIT |
| CN101737050A (en) * | 2008-11-25 | 2010-06-16 | 宝钢集团上海梅山有限公司 | Deep hole arranging method in mining |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413822A (en) * | 2018-04-12 | 2018-08-17 | 长沙矿山研究院有限责任公司 | To fan shaped medium length hole Shock reducing blasting method in one kind |
| CN110926285A (en) * | 2019-12-10 | 2020-03-27 | 北京科技大学 | Method for reducing lump size of ore for sublevel caving mining without sill pillar |
| CN111023928A (en) * | 2019-12-10 | 2020-04-17 | 北京科技大学 | Method for improving ore dropping efficiency without bottom pillar |
| CN113465462A (en) * | 2021-05-07 | 2021-10-01 | 北京科技大学 | Mining method for eliminating sublevel caving mining suspended roof without sill pillar |
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Application publication date: 20171229 |