CN108489348A - A kind of deep hole and the knockdown hard rock air bench blasting method of short-bore - Google Patents
A kind of deep hole and the knockdown hard rock air bench blasting method of short-bore Download PDFInfo
- Publication number
- CN108489348A CN108489348A CN201810098771.7A CN201810098771A CN108489348A CN 108489348 A CN108489348 A CN 108489348A CN 201810098771 A CN201810098771 A CN 201810098771A CN 108489348 A CN108489348 A CN 108489348A
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- Prior art keywords
- hole
- quick
- bore
- deep hole
- short
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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
-
- 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 invention discloses a kind of deep holes and the knockdown hard rock air bench blasting method of short-bore, and this approach includes the following steps, and first, diamond shape is arranged on stair working face（Drilling）Then main quick-fried deep hole assists short-bore in the quick-fried deep hole intermediate arrangement of master, and main quick-fried deep hole explosive length is the 57~63% of its hole depth, and auxiliary short-bore dress length is the 15~20% of its hole depth；When detonation, main quick-fried deep hole is all made of bottom hole msdelayed light emission hole-by-hole initiation with auxiliary short-bore.This complex group is box-like（Deep hole is combined with short-bore）Air bench blasting method can be effectively improved the superhard quick-fried rock mass of hardly possible without powder charge region（Step top/top）Demolition effect, reduce the boulder yield in quick-fried area, improve global blowup quality.Have the characteristics that drilling less, unit consumption is low, simple for process, the activity duration is short, blasting efficiency is high and at low cost.
Description
Technical field
The present invention relates to a kind of deep hole and the knockdown hard rock air bench blasting method of short-bore, this method is widely used in
In large surface mine and all kinds of cubic metres of earth and stone stripping engineering integrality preferably, it is fine and close, in hard extremely hard rock body bench blasting.
Background technology
Outdoor hard rock step long-hole blasting filling segment length accounts for blasthole overall length 1/3 or so, quick-fried due to filling section not blasting charge
Broken energy is unable to give full play the broken effect that causes, and is blocked at the top of quick-fried backward step（Filling）Often there is boulder yield height, quick-fried heap poor morphology in section
（Irregularly）, shovel dress efficiency it is low the problems such as.To solve these problems, generally can by improve explosive specific charge, reduce Hole pattern parameters,
Increase single hole explosive payload, reduce blocking（Filling）The approach such as length are improved.But these methods are long there are the activity duration, drilling
Quantity is more, blasting cost is high, complex process, safety is low, concussion of blasting is big and demolition effect improves the problems such as space is limited.
Invention content
To solve the above-mentioned problems, the object of the present invention is to provide a kind of activity duration is short, drilling hole amount is few, blasting cost
The knockdown hard rock air bench blasting method of group deep hole and short-bore low, simple for process, safe, concussion of blasting is small.
In order to solve the above-mentioned technical problem, a kind of deep hole and the knockdown hard rock air bench blasting method of short-bore, the party
Method specifically includes following steps：
Step I, basis wait for explosiveness, the boring aperture in quick-fried regionD, explosive specific chargeq, bank slopeα, drilling machine job safety it is flat
Platform widthB, step heightH 0Parameter determines the toe burden for waiting for quick-fried regionW, deep hole hole depthH, deep hole pitch-rowaWith rejectb；
Step II, the result of calculation according to step I, diamond shape arranges hole depth on stair working faceH, deep hole pitch-rowaAnd row
It refusesbThe quick-fried deep hole of multiple masters；
Step III, the result of calculation according to step I, in conjunction with unit consumptionq, step heightH 0Determine every hole of the quick-fried deep hole of the master
Explosive payloadQ 1And packed heightH c；
Step IV is formed by geometric grid center Drilling short-bore in the quick-fried deep hole of step II institute Drilling master；
Step V, the explosiveness according to the rock mass for waiting for quick-fried region, rock mass longitudinal wave velocityC, rock density, pitch-row, to reject parameter true
Surely quick-fried deep hole is led to delay to be spaced with the detonation of short-bore is assisted；
Step VI places explosive according to step V result of calculation in each hole（Including priming bomb and digital electric detonator）
And the burst time is set；Each deep hole explosive amount of gained, the powder charge into each hole, then line detonation are calculated according to step III, IV.
Further, the quick-fried deep hole of the master and auxiliary short-bore are vertical holes, and aperture is identical.
Further, the quick-fried deep hole of the master is diamond shape arrangement, forms hole net unit, and all auxiliary short-bore are also that diamond shape is arranged
Form hole net unit.
Further, the auxiliary short-bore is located at the friendship of quick-fried the formed diagonal of a parallelogram of deep hole hole net unit of the master
Point.
Further, the short-bore hole depthhFor deep hole packed heightH c1 ~ 1.2 times, shot elevationh cFor short-bore hole depthh's
15~20%, short-bore packed height is not less than short-bore hole depthh65%.
Further, the quick-fried deep hole explosive length of the master is the 57~63% of its hole depth.
Further, the quick-fried deep hole of the master uses bottom hole msdelayed light emission hole-by-hole initiation.
Further, the short-bore burst timeT cLess than millisecond time between the quick-fried deep hole row of masterT a。
Further, the quick-fried deep hole of the master is all made of digital electric detonator detonation with auxiliary short-bore.
Further, millisecond time between the quick-fried deep hole row of the masterT aWith Delay between holes intervalT bTime is not greater than 30ms, and main
Millisecond crushing blasting between quick-fried deep hole rowT aLess than Delay between holes interval timeT b。
Using the combined type of above-mentioned technical proposal（Deep hole is combined with short-bore）Hard rock air bench blasting method has following
Advantage：
1, compared with traditional bench blasting, the number of the boring hole significantly reduces, bore the quick-fried activity duration greatly shorten, technique it is simpler；
2, since hole count is reduced, priming system and explosive specific charge are relatively low, reduce explosion totle drilling cost, also reduce blasting flyrock and quick-fried
The harm such as broken vibrations；
3, using digital electric detonator relative to nonel tube, delay precision higher, millisecond delays to select and collocation is more, comprehensive
It is more preferable to close demolition effect.
4, short-bore and deep hole fill area are located at same level, and when explosion can act on mutually superimposed with deep hole blasting, can have
Effect improves the blasting quality of step deep hole fill area.
Description of the drawings
Fig. 1 is the working face steel for shot schematic diagram of the present invention.
Fig. 2 is the working face steel for shot diagrammatic cross-section of the present invention.
Fig. 3 is the working face blast hole projectile filling diagrammatic cross-section of the present invention.
Fig. 4 is the working face blasthole burst time schematic diagram of the present invention.
Fig. 5 is the working face steel for shot schematic diagram in specific embodiments of the present invention.
Specific implementation mode
The invention will be further described with specific implementation step below in conjunction with the accompanying drawings.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of deep hole of the present invention and the knockdown hard rock air bench blasting of short-bore
Method, this method specifically include following steps：
Step I, basis wait for explosiveness, the boring aperture in quick-fried regionD, explosive specific chargeq, bank slopeα, drilling machine job safety it is flat
Platform widthB, step heightH 0Parameter determines the toe burden for waiting for quick-fried regionW, deep hole hole depthH, deep hole pitch-rowaWith rejectb；
Step II, the result of calculation according to step I, diamond shape arranges hole depth on stair working faceH, deep hole pitch-rowaAnd row
It refusesbThe quick-fried deep hole of multiple masters；
Step III, the result of calculation according to step I, in conjunction with unit consumptionq, step heightH 0Determine every hole of the quick-fried deep hole of the master
Explosive payloadQ 1And packed heightH c；
Step IV is formed by geometric grid center Drilling short-bore in the quick-fried deep hole of step II institute Drilling master；
Step V, the explosiveness according to the rock mass for waiting for quick-fried region, rock mass longitudinal wave velocityC, rock density, pitch-row, to reject parameter true
Surely quick-fried deep hole is led to delay to be spaced with the detonation of short-bore is assisted；
Step VI places explosive according to step V result of calculation in each hole（Including priming bomb and digital electric detonator）
And the burst time is set；Each deep hole explosive amount of gained, the powder charge into each hole, then line detonation are calculated according to step III, IV.
Further, the quick-fried deep hole of the master and auxiliary short-bore are vertical holes, and aperture is identical.
Further, the quick-fried deep hole of the master is diamond shape arrangement, forms hole net unit, and all auxiliary short-bore are also that diamond shape is arranged
Form hole net unit.
Further, the auxiliary short-bore is located at the friendship of quick-fried the formed diagonal of a parallelogram of deep hole hole net unit of the master
Point.
Further, the short-bore hole depthhFor deep hole packed heightH c1 ~ 1.2 times, shot elevationh cFor short-bore hole depthh's
15~20%, short-bore packed height is not less than short-bore hole depthh65%.
Further, the quick-fried deep hole explosive length of the master is the 57~63% of its hole depth.
Further, the quick-fried deep hole of the master uses bottom hole msdelayed light emission hole-by-hole initiation.
Further, the short-bore burst timeT cLess than millisecond time between the quick-fried deep hole row of masterT a。
Further, the quick-fried deep hole of the master is all made of digital electric detonator detonation with auxiliary short-bore.
Further, millisecond time between the quick-fried deep hole row of the masterT aWith Delay between holes intervalT bTime is not greater than 30ms, and main
Millisecond crushing blasting between quick-fried deep hole rowT aLess than Delay between holes interval timeT b。
Specific embodiment：
A kind of deep hole and the knockdown hard rock air bench blasting method of short-bore,
Step I, basis wait for that explosiveness, boring aperture D, explosive specific charge q, bank slope α, the drilling machine job safety in quick-fried region are flat
Platform width B, step height H0Etc. parameters, determine and wait for the toe burden W in quick-fried region, deep hole hole depth H, deep hole pitch-row a and reject
b；
Step II, as depicted in figs. 1 and 2, the diamond shape arrangement hole depth on stair working faceH, deep hole pitch-rowaWith rejectbMaster it is quick-fried
Deep hole 1,2,3,4 etc., L12 =L34=a, L13 =L14= L42And the vertical range of hole 1 to 4 line of hole 3 and hole isb；
Step III, the result of calculation according to step I, in conjunction with unit consumptionq, step height etc.H 0Determine that deep hole fills section 7 per hole
DoseQ 1With the height of filling section 6H c, the length of main quick-fried deep hole explosive section 7 is the 57~63% of its hole depth；
Step IV, as shown in Figure 1, Figure 2 and Figure 3, it is diagonal to be formed by several parallelogram in the quick-fried deep hole of institute Drilling master 1,2,3,4
Line point of intersection Drilling short-bore 5, L15 =L54, L52 =L35Deep hole and short-bore are vertical holes, and aperture is identical, and all short-bore are also
Diamond shape is arranged；5 hole depth of short-borehFor 1 packed height of deep holeH c1 ~ 1.2 times, the height of powder charge section 9h cFor short-bore hole depthh15~
20%, the height that short-bore fills section 8 is not less than short-bore hole depthh65%.
Step V, the explosiveness according to the rock mass for waiting for quick-fried region, rock mass longitudinal wave velocityC, rock density, pitch-row, reject
Parameter determines that the quick-fried deep hole of master and auxiliary short-bore detonation delay to be spaced；
Step VI places explosive according to step V result of calculation in each hole（Including priming bomb and digital electric detonator）
And the burst time is set, as shown in figure 4, all blastholes use bottom hole msdelayed light emission hole-by-hole initiation.Assist short-bore 5 and adjacent elder generation
Quick-fried deep hole 1 detonates simultaneously.Quick-fried deep hole of the master 1,2,3,4 etc. is all made of digital electric detonator detonation with auxiliary short-bore 5.The master
Millisecond time Ta between quick-fried deep hole row（Ta=T3-T1=T4-T2）With Delay between holes intervalT b（T b=T 2-T 1=T 4-T 3）Time must not be big
In 30ms.Millisecond crushing blasting between the quick-fried deep hole row of masterT aLess than Delay between holes interval timeT b.It is calculated according to step III, IV
Each deep hole explosive amount of gained, the powder charge into each hole, then line detonation.
Claims (10)
1. a kind of deep hole and the knockdown hard rock air bench blasting method of short-bore, which is characterized in that this method specifically include with
Lower step：
Step I, basis wait for explosiveness, the boring aperture in quick-fried regionD, explosive specific chargeq, bank slopeα, drilling machine job safety it is flat
Platform widthB, step heightH 0Parameter determines the toe burden for waiting for quick-fried regionW, deep hole hole depthH, deep hole pitch-rowaWith rejectb；
Step II, the result of calculation according to step I, diamond shape arranges hole depth on stair working faceH, deep hole pitch-rowaAnd row
It refusesbThe quick-fried deep hole of multiple masters；
Step III, the result of calculation according to step I, in conjunction with unit consumptionq, step heightH 0Determine every hole of the quick-fried deep hole of the master
Explosive payloadQ 1And packed heightH c；
Step IV is formed by geometric grid center Drilling short-bore in the quick-fried deep hole of step II institute Drilling master；
Step V, the explosiveness according to the rock mass for waiting for quick-fried region, rock mass longitudinal wave velocityC, rock density, pitch-row, to reject parameter true
Surely quick-fried deep hole is led to delay to be spaced with the detonation of short-bore is assisted；
Step VI places explosive according to step V result of calculation in each hole（Including priming bomb and digital electric detonator）
And the burst time is set；Each deep hole explosive amount of gained, the powder charge into each hole, then line detonation are calculated according to step III, IV.
2. combined type hard rock air bench blasting method according to claim 1, it is characterized in that：The quick-fried deep hole of the master with
It is vertical holes to assist short-bore, and aperture is identical.
3. blasting method according to claim 1 or 2, it is characterized in that：The quick-fried deep hole of master is diamond shape arrangement, forms hole
Net unit, all auxiliary short-bore are also that diamond shape is arranged to form hole net unit.
4. blasting method according to claim 3, it is characterized in that：The auxiliary short-bore is located at the quick-fried deep hole hole pattern list of the master
The intersection point of the formed diagonal of a parallelogram of member.
5. blasting method according to claim 1 or 2, it is characterized in that：The short-bore hole depthhFor deep hole packed heightH c1
~ 1.2 times, shot elevationh cFor short-bore hole depthh15~20%, short-bore packed height be not less than short-bore hole depthh65%.
6. blasting method according to claim 1 or 2, it is characterized in that：The quick-fried deep hole explosive length of master is its hole depth
57~63%.
7. blasting method according to claim 1 or 2, it is characterized in that：The quick-fried deep hole of master using bottom hole msdelayed light emission by
It detonates in hole.
8. blasting method according to claim 1 or 2, it is characterized in that：The short-bore burst timeT cLess than the quick-fried deep hole row of master
Between millisecond timeT a。
9. rank blasting method according to claim 1 or 2, it is characterized in that：The quick-fried deep hole of master is all made of with auxiliary short-bore
Digital electric detonator detonates.
10. blasting method according to claim 1 or 2, it is characterized in that：Millisecond time between the quick-fried deep hole row of masterT aThe hole and
Between millisecond timeT bTime is not greater than 30ms, and millisecond crushing blasting between main quick-fried deep hole rowT aLess than Delay between holes interval timeT b。
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| CN108489348B CN108489348B (en) | 2019-10-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595308A (en) * | 2019-09-20 | 2019-12-20 | 鞍钢集团矿业有限公司 | Method for treating goaf by ultra-deep hole blasting of strip mine |
| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
| CN112683120A (en) * | 2020-12-23 | 2021-04-20 | 中铁十九局集团矿业投资有限公司 | Method for blasting frozen soil layer of surface mine |
| CN115325895A (en) * | 2022-09-20 | 2022-11-11 | 鹤庆北衙矿业有限公司 | Strip mine slope presplitting blasting layout mode |
| CN115979085A (en) * | 2023-03-07 | 2023-04-18 | 北京科技大学 | Liquid carbon dioxide blasting method suitable for open-air high steps |
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| CN107328327A (en) * | 2017-08-31 | 2017-11-07 | 广东锡源爆破科技股份有限公司 | The soft or hard blast hole loading structure and its method for being mingled with beded rock mass Long-hole Bench Blasting |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595308A (en) * | 2019-09-20 | 2019-12-20 | 鞍钢集团矿业有限公司 | Method for treating goaf by ultra-deep hole blasting of strip mine |
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| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
| CN112683120A (en) * | 2020-12-23 | 2021-04-20 | 中铁十九局集团矿业投资有限公司 | Method for blasting frozen soil layer of surface mine |
| CN112683120B (en) * | 2020-12-23 | 2021-09-03 | 中铁十九局集团矿业投资有限公司 | Method for blasting frozen soil layer of surface mine |
| CN115325895A (en) * | 2022-09-20 | 2022-11-11 | 鹤庆北衙矿业有限公司 | Strip mine slope presplitting blasting layout mode |
| CN115979085A (en) * | 2023-03-07 | 2023-04-18 | 北京科技大学 | Liquid carbon dioxide blasting method suitable for open-air high steps |
| CN115979085B (en) * | 2023-03-07 | 2024-03-19 | 北京科技大学 | Liquid carbon dioxide blasting method suitable for open-air high steps |
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