CN1030473A - Large separation distance open-air type powder chamber blasting method - Google Patents
Large separation distance open-air type powder chamber blasting method Download PDFInfo
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- CN1030473A CN1030473A CN 87104532 CN87104532A CN1030473A CN 1030473 A CN1030473 A CN 1030473A CN 87104532 CN87104532 CN 87104532 CN 87104532 A CN87104532 A CN 87104532A CN 1030473 A CN1030473 A CN 1030473A
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- blasting
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Abstract
Large separation distance open-air type powder chamber blasting method relate to a kind of in special chamber or tunnel the method for charge explosion, its standard standing action index n.Greater than 1.4 and be less than or equal to 2, normal charge and pinpoint blasting and when weakening standing the monomer medicine decide explosive payload and calculate by the corresponding experience formula.Adopt large separation distance open-air type powder chamber blasting method can obviously reduce the blasting engineering construction volume, shorten construction period greatly, significantly reduce construction costs.Large separation distance open-air type powder chamber blasting method can be widely used in surface mining engineering, railway and highway cutting engineering and the water conservancy damming works.
Description
The present invention relates to a kind of open-air type powder chamber blasting method.
Open-air type powder chamber blasting method is the method for charge explosion in special chamber or tunnel, in extractive industry, especially in the open mining in, open-air type powder chamber blasting method occupies very consequence.When adopting open-air type powder chamber blasting, at first dig in plan explosion area and lead cave and a plurality of coyote hole according to the blasting engineering design, and in each coyote hole of being dug, load certain quick-fried medicine (general normal employing ammonal) of some, then the cave of being dug of leading is stopped up and ignites explosive in the coyote hole.The effect of open-air type powder chamber blasting depends primarily on the layout of burst-chamber and the explosive payload in the monomer coyote hole, characterize that coyote hole is arranged and demolition effect between an important parameter concerning be blasting action index n, the ratio of the distance between promptly adjacent two coyote holes and explosion layer thickness (minimum burden).Objective effect according to explosion can be divided into three major types with open-air type powder chamber blasting, i.e. standard standing, pinpoint blasting and weaken standing.Just make the explosion layer loosening and explosion that do not form hopper pit is called the standard standing, the blasting action index when producing the standard standing is called standard standing action index n
0, the explosive payload of each monomer coyote hole is called normal charge Q when producing the standard standing
0Blasting action index n greater than with less than standard standing action index n
0The time explosion be called pinpoint blasting and weaken standing, pinpoint blasting and when weakening standing the explosive payload of each monomer coyote hole according to normal charge Q
0Revise with actual blasting action index, and normal charge Q
0Then calculate by empirical equation according to explosion layer thickness (minimum burden).
When adopting open-air type powder chamber blasting and since need dig for number a lot of lead cave and coyote hole, so the construction volume of blasting engineering is very big, construction period is very long, the consumption of unit explosive is also very high.Especially as standard standing action index n
0(be generally 0.8～1 in the prior art when selecting lowlyer, be no more than 1.3～1.4 when the highest), the coyote hole spacing is less relatively, and coyote hole density increases relatively, the coyote hole sum increases relatively, and the above-mentioned defective of open-air type powder chamber blasting method shows particularly evidently.
The objective of the invention is the layout of existing open-air type powder chamber blasting method mesothecium and the calculating of monomer coyote hole explosive payload are improved,, shorten construction period, save explosive, reduce the blasting engineering cost so that reduce the construction volume of open-air type powder chamber blasting.
To achieve these goals, the present invention is when increasing substantially standard standing action index n and promptly increasing considerably adjacent coyote hole spacing, suitably increase the explosive payload of each monomer coyote hole, significantly reduce coyote hole sum and powder factor guaranteeing to reach under the prerequisite of identical demolition effect.Below in conjunction with specific embodiment technical characterictic of the present invention is described in further detail.
The effect of open-air type powder chamber blasting depends mainly on the layout of coyote hole and the explosive payload of monomer coyote hole, and the substantive issue that coyote hole is arranged is the selection of coyote hole spacing, also is standard standing action index n
0Selection.These two factors both interknited, and conditioned each other again.In general, determine any one factor and change the demolition effect that other factor can both guarantee to reach expection; In engineering practice, for convenience's sake, the suitable standard standing action index n of general selection earlier
0, utilize through practice test then and prove the explosive payload that practicable empirical equation is determined each monomer coyote hole.Therefore, choose reasonable standard standing action index n
0It is the key of open-air type powder chamber blasting.Obviously, just reduce coyote hole sum, n
0Select big more favourablely more.But standard standing action index n
0Be subjected to the restriction of multiple factor, can not have unrestrictedly increased.The general n that selects in the prior art
0=0.8～1, reach as high as 1.3～1.4, in this scope, set up an effective normal charge empirical equation of cover and an explosive payload correction empirical equation; But when surpassing this scope, these empirical equations just are false, thereby can not reach the demolition effect of expection.
The inventor proves through repetition test, is suitably increasing under the condition of monomer coyote hole explosive payload standard standing action index n
0Can on 1.4 basis, further improve, can bring up to n at least
0=2; And normal charge empirical equation and explosive payload correction formula have been determined with regard to four class loess, mud diagenesis, weathering sandstone and four kinds of geological conditions of granite, and prove that these empirical equations are effective through repetition test, can reach the demolition effect of expection fully.The explosive payload Q of each monomer coyote hole during the standard standing among the present invention
0The calculating empirical equation of (being normal charge) is:
Q
0=C
0CW
3(kilogram)
C wherein
0Be constant, C is a rock coefficient (kilogram/rice
3), W is minimum burden (rice).
Among the present invention pinpoint blasting and when weakening standing the explosive payload Q of each monomer coyote hole still according to normal charge Q
0Revise with actual blasting action index.
Large separation distance open-air type powder chamber blasting method of the present invention compared with prior art has following characteristics and advantage at least: (1) can significantly reduce the economic explosion layer thickness of open-air type powder chamber blasting; If n0Bring up to 2 by 1, then economic explosion layer thickness can be reduced to 3.5 meters by 7 meters: this has just expanded the scope of application of open-air type powder chamber blasting method greatly; (2) large separation distance open-air type powder chamber blasting can obviously reduce the construction volume of blasting engineering, thereby greatly shortens construction period; n0Bring up at 2 o'clock by 1, the blasting engineering construction volume can reduce 50% at least; (3) although the explosive payload of monomer coyote hole increases to some extent during large separation distance open-air type powder chamber blasting, powder factor still can reduce; Such as n0Bring up to 2 from 1, powder factor can reduce by 15% at least; (4) can significantly reduce construction costs; Such as n0Bring up to 2 from 1, the total cost of blasting engineering can reduce more than 20%.
This shows, adopt large separation distance open-air type powder chamber blasting method greatly to shorten construction period reaching the construction volume that significantly reduces blasting engineering under the prerequisite of identical demolition effect, save explosive, significantly reduce construction costs. Thereby large separation distance open-air type powder chamber blasting method has obvious economic benefit and social benefit, can be widely used in surface mining engineering, railway and highway cutting engineering and the water conservancy damming works.
Claims (2)
1, a kind of in special chamber or tunnel the open-air type powder chamber blasting method of charge explosion, at first dig and lead cave and more than one coyote hole in plan explosion area, and in each coyote hole of being dug the filling some certain explosive, stop up then and lead cave and to ignite explosive in the coyote hole, distance between described adjacent two coyote holes is called blasting action index n with the ratio of explosion layer thickness (minimum burden), just make the explosion layer loosening and explosion that do not form hopper pit is called the standard standing, the blasting action index during the standard standing is called standard standing action index n
6, n＞n
0And n＜n
0The time explosion be called pinpoint blasting and weaken standing; The explosive payload of each coyote hole is calculated by empirical equation according to explosion layer thickness (minimum burden) during the standard standing, pinpoint blasting and when the explosive payload of each coyote hole is according to the standard standing when weakening standing the explosive payload and the blasting action index of each coyote hole revise; The invention is characterized in described standard standing action index n
0Greater than 1.4 and be less than or equal to 2; The explosive payload Q of each coyote hole during described standard standing
0Calculate as follows:
Q
0=C
0CW
3(kilogram)
C wherein
0Be constant, C is a rock coefficient (kilogram/rice
3), W is minimum burden (rice).
2, open-air type powder chamber blasting method according to claim 1 is characterized in that described standard standing action index n
0Equal 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104532 CN1032882C (en) | 1987-06-30 | 1987-06-30 | Large separation distance open-air type powder chamber blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104532 CN1032882C (en) | 1987-06-30 | 1987-06-30 | Large separation distance open-air type powder chamber blasting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030473A true CN1030473A (en) | 1989-01-18 |
| CN1032882C CN1032882C (en) | 1996-09-25 |
Family
ID=4814920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104532 Expired - Fee Related CN1032882C (en) | 1987-06-30 | 1987-06-30 | Large separation distance open-air type powder chamber blasting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032882C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943552A (en) * | 2010-08-23 | 2011-01-12 | 重庆城建控股(集团)有限责任公司 | Directional blasting structure for celebration |
-
1987
- 1987-06-30 CN CN 87104532 patent/CN1032882C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943552A (en) * | 2010-08-23 | 2011-01-12 | 重庆城建控股(集团)有限责任公司 | Directional blasting structure for celebration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032882C (en) | 1996-09-25 |
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