CN1040074A - Utilize the method for blast crushing kinds of rock - Google Patents
Utilize the method for blast crushing kinds of rock Download PDFInfo
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- CN1040074A CN1040074A CN 88104695 CN88104695A CN1040074A CN 1040074 A CN1040074 A CN 1040074A CN 88104695 CN88104695 CN 88104695 CN 88104695 A CN88104695 A CN 88104695A CN 1040074 A CN1040074 A CN 1040074A
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- sealing clay
- rock
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- blast
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Abstract
Utilize the method for blast crushing kinds of rock to comprise blast hole drilling, in borehole, place the blasting charge and the sealing clay that has detonating agent.Sealing clay will be made of the insensitiveness explosive that detonation is had low sensitivity.
Description
The invention belongs to mining industry, more particularly belong to the method for utilizing the blast crushing kinds of rock.
For each rocks that utilizes the deep hole blasting charge to explode to come in broken shallow hole road and the opencut, it is optimum using the method that the present invention recommended.
Load and the productivity ratio of haulage device depends on the degree of usefulness explosion method crushing kinds of rock to a great extent, and the lump of the explosion closeness of caving in.Therefore, the current problem that improves the detonation effect that exists.Improve in the factor of detonation effect in many influences, stemming has very big effect, and this stemming plays material impact for the adequacy of explosion energy mine medium conduction towards periphery.
Known a kind of method of utilizing the blast crushing kinds of rock, this method comprises blast hole drilling, places the blasting charge and the sealing clay (E.H. Ku Tuzuofu, " blasting works ", 1980, mining industry publishing house, Moscow, 236～237 pages) that has detonating agent in borehole.In sealing clay, settle several 2～5 kilograms sealing blastings charge.
Such sealing clay is placed on the top of borehole, can make that to be used for the effective explosion energy of part of broken step top rock not too big, and the rock on step top produces the main root of boulder yield just.In addition, adopt the sealing clay of this pattern, owing to the time of detonation product to borehole wall continuous action falls short of, thus can not effectively explosion energy be conducted to the medium that will destroy, to finish the fragmentation of this medium being carried out high effect.
Basic task of the present invention is a kind of method of utilizing the blast crushing kinds of rock of development, this method require sealing clay make when utilizing the blast crushing kinds of rock, can improve degree of safety, by means of evenly suppressing explosion impulse, boulder yield can be reduced, and the intensive form of rock piece collapse into of explosion can be obtained.
Being proposed of task is to solve like this, utilizes the method for blast crushing kinds of rock to include blast hole drilling, places the blasting charge and the sealing clay that has detonating agent in borehole, according to the present invention, sealing clay is made the insensitiveness explosive that detonation is had low sensitivity.
The insensitiveness explosive has the characteristic to the low sensitivity of detonation, and its detonation rate is lower than the detonation rate with the blasting charge that can regulate the blast attenuation limiting length, utilize this insensitiveness explosive as sealing clay, can control the unit impulse of the borehole side that will conduct to step top, the possibility of adjusting breakage properties has so also just been arranged.
When using sealing clay, conduct to whole momentum values of borehole side surface by the blasting charge, can compare with top bar whole momentums on top of the section that is positioned at sealing clay detonation part, and this momentum value can reach 70% of the whole momentum values of the blasting charge.
According to shock wave and main blasting charge suction wave and the interactional situation that occurs in the various ripples in decay detonation and the sealing clay combustion process, make sealing clay to such an extent that make the limiting length of its length greater than the decay of insensitiveness explosive charge.
Sealing clay can be made of the ammonium nitrate of 10～15% water insensitivenessization.
The limiting length of blast attenuation can be adjusted like this, and additional-energy can be told to destroy the place that the boulder yield most probable occurs.
According to the present invention, use the explosion method crushing kinds of rock, by means of the effectiveness of the deep hole blasting charge, can significantly improve the effect of destroying each rocks, secondly, can realize the height reliability of blasting work, in addition, can also when giving stemming, eliminate hand labour, and utilize charging machine powder charge in the borehole, to realize the mechanization of this process.In addition, according to the present invention, use sealing clay can increase blast to whole large stretch of ore that will destroy, with and the action time and the amplitude on top, and the main place that the top of large stretch of ore produces boulder yield when mining site carries out blasting work just in the open.
Utilize the method for blast crushing kinds of rock to carry out in the following manner.
In should fragmented rock, get out the borehole of necessary and sufficient amount.In each borehole, packing into has the blasting charge of detonating agent.Can utilize the insensitiveness explosive that detonation is had low sensitivity as sealing clay, as the ammonium nitrate of drying.
Can make the length of sealing clay greater than the limiting length of insensitiveness explosive charge decay.
The theoretical length of sealing clay is calculated as follows:
1＝0.5+ (D
2· 1
1)/(D
1-D
2)
L in the formula
1The length of the deep hole blasting charge between two priming devices, m;
D
1The detonation rate of the deep hole blasting charge, m/s;
D
2Average detonation rate in the sealing clay (ammonium nitrate), 1100m/s.
The test of being carried out shows, can adjust the limiting length of blast attenuation according to the degree of water insensitiveness sealing clay.Also determine simultaneously, when using detonation rate less than the explosive of 4000m/s, the water with 10% with the ammonium nitrate sealing clay in addition insensitivenessization be suitable, and, carry out insensitivenessization to sealing clay with 15% water when use detonation rate during greater than 4000m/s.
The result of the observation photographic data of camera lens shows one by one, when cartridge bag has the sealing clay of making by the present invention, the zero-time that explosive is dished out from borehole just takes place later on about deep hole cartridge bag 50～60 μ s that detonate greatly, promptly when adopting the sealing clay of being recommended, detonation product is to the duration of lump ore effect, compare with using existing sealing clay (inertia), approximately increase by 2 times.
Example
In the degree of depth is 14m, and diameter is in the borehole of 250mm, and putting into length is the blasting charge of 7m.Use Ge Lameng nit (rpaMMOHNT) to make explosive.Detonate from the two sides.The detonation rate D of the blasting charge
1=4200m/s.The average detonation rate D of sealing clay
2=1100m/s.Sealing clay length l=3m.Use ammonium nitrate to make sealing clay, ammonium nitrate is with the water of weight 15% insensitivenessization in addition own.
Pressing the effect of each rocks of method explosion of being recommended should be estimated, main evaluation criterion is for using the determined granulometric composition of photograph planimetric method, this method will be measured one by one to bulk, and will be measured the width that caves in of the lump of explosion.
According to the result of blast, compared with original situation, can observe out, along the whole height of step fractured rock equably all.Especially big granularity greater than 400mm drops to below 50%, and boulder yield reduces more than 2/3, is significantly alleviating under the situation that the explosion time stone disperses, and the width that caves in of the lump of explosion has reduced 6M.
Claims (3)
1, utilize the method for blast crushing kinds of rock to comprise blast hole drilling, place the blasting charge and the sealing clay that has detonating agent in borehole, the characteristics of this method are, sealing clay is made with having the insensitiveness explosive that detonation is had a low sensitivity.
2, according to claim 1, the characteristics of this method are, sealing clay is made to such an extent that make the limiting length of its length greater than the decay of insensitiveness explosive charge.
3, according to claim 1, the characteristics of this method are, sealing clay is made by the ammonium nitrate of 10～15% water insensitivenessization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104695 CN1040074A (en) | 1988-07-30 | 1988-07-30 | Utilize the method for blast crushing kinds of rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104695 CN1040074A (en) | 1988-07-30 | 1988-07-30 | Utilize the method for blast crushing kinds of rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1040074A true CN1040074A (en) | 1990-02-28 |
Family
ID=4833107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88104695 Pending CN1040074A (en) | 1988-07-30 | 1988-07-30 | Utilize the method for blast crushing kinds of rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1040074A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035839C (en) * | 1992-11-23 | 1997-09-10 | 国家建材局苏州非金属矿工业设计研究院 | Controlled blasting and quarrying method for facing stone |
| CN103900429A (en) * | 2014-04-18 | 2014-07-02 | 武汉爆破有限公司 | Concrete hollow pillar blasting method |
| CN103938888A (en) * | 2014-05-14 | 2014-07-23 | 中钢集团武汉安全环保研究院有限公司 | Blasting demolition method for cylindrical steel column structure buildings |
-
1988
- 1988-07-30 CN CN 88104695 patent/CN1040074A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035839C (en) * | 1992-11-23 | 1997-09-10 | 国家建材局苏州非金属矿工业设计研究院 | Controlled blasting and quarrying method for facing stone |
| CN103900429A (en) * | 2014-04-18 | 2014-07-02 | 武汉爆破有限公司 | Concrete hollow pillar blasting method |
| CN103900429B (en) * | 2014-04-18 | 2016-01-06 | 武汉爆破有限公司 | A kind of blasting method of concrete hollow column |
| CN103938888A (en) * | 2014-05-14 | 2014-07-23 | 中钢集团武汉安全环保研究院有限公司 | Blasting demolition method for cylindrical steel column structure buildings |
| CN103938888B (en) * | 2014-05-14 | 2016-01-27 | 中钢集团武汉安全环保研究院有限公司 | The blasting demolishing method of a kind of tubular steel column structure construction of structures |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |