CN109029176A - Sectional type cutting method - Google Patents
Sectional type cutting method Download PDFInfo
- Publication number
- CN109029176A CN109029176A CN201811005397.8A CN201811005397A CN109029176A CN 109029176 A CN109029176 A CN 109029176A CN 201811005397 A CN201811005397 A CN 201811005397A CN 109029176 A CN109029176 A CN 109029176A
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- China
- Prior art keywords
- group
- borehole
- square
- blasting
- hole
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 6
- 238000005474 detonation Methods 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005422 blasting Methods 0.000 abstract description 8
- 230000005641 tunneling Effects 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000004880 explosion Methods 0.000 description 9
- 238000010304 firing Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
Classifications
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention relates to a tunneling method, in particular to a sectional type cutting method. Which comprises the following steps: a square cut area is arranged on a tunnel cut surface, a first group of blast holes are respectively arranged at the middle points of four sides of the square cut area, a second group of blast holes are respectively arranged at four corners of the square cut area, and a compensation hole is arranged at the center of the square cut area; charging powder at the bottoms of the first group of blastholes and the second group of blastholes to plug the orifices of the blastholes; the first set of blastholes detonate first and the second set of blastholes detonate in a delayed manner. Because the depth of the stage cut hole is different along the tunneling direction, a free surface is created for blasting of the second group of blast holes after blasting of the first group of blast holes, the cutting effect is increased, the blasting clamping performance of the blasting bottom is reduced, and the blasting effect of the blasting bottom is greatly improved.
Description
Technical field
The present invention relates to a kind of methods of tunnel piercing, and in particular to a kind of segmented cut shot method.
Background technique
In tunnel excavating process, the arrangement of borehole is very crucial, determines the superiority and inferiority of route sinking and blasting effect, tradition
The arrangement of borehole is divided into two classes, burn cut and angled cut substantially, wherein being applied with burn cut than wide；Strabismus
The advantages of slotting, is to form compensation space effectively by outside the rock ejection aperture within the scope of slotting, be formed needed for compensation space
The blasthole number wanted is few and blast hole utilization factor is high, but the required precision of borehole inclination angle is very high simultaneously, and single explosion drilling depth is limited
System；Burn cut is to dig the depth of all boreholes to same depth, and all borehole bottoms are parallel, the depth and driving of borehole
Depth is consistent, and blast hole utilization factor is low, and borehole is easy to produce explosion clipping, influences slotting effect.
Summary of the invention
In order to solve the problems in the prior art, the purpose of the present invention is to provide a kind of segmented cut shot method.
The specific technical solution of the present invention is as follows:
A kind of segmented cut shot method, which comprises the following steps:
A, square slotting region is set on tunnel slotting face, and the midpoint on square four side of slotting region is respectively set the
Second group of borehole is respectively set in one group of borehole on the quadrangle in square slotting region 1, at square 1 center of slotting region
Compensation hole is set；
B, in first group of borehole and second group of borehole bottom hole powder charge, the aperture of borehole is blocked；
C, first group of borehole detonates first, second group of borehole delay detonation.
The four side side lengths in the preferred square slotting region are 500mm, first group of borehole and second group of borehole it is straight
Diameter is 38mm, and the hole depth of first group of borehole is 1.8m, and the hole depth of second group of borehole is 3m, and the diameter of compensation hole is 90mm, compensation
The hole depth in hole is 3.2m；The loaded length of first group of borehole is 1.2m, and the loaded length of second group of borehole is 1m, first group of borehole
Aperture stemming length with second group of borehole is 0.6m, and second group of borehole functioning delay is 50ms.
The invention has the following advantages:
1, the scope of freedom is increased
It is second group of big gun after first group of hole firing since the depth of stage cutting method keyhole is different along tunneling direction depth
Eye explosion creates the scope of freedom, increases slotting effect, reduces the explosion clipping of explosion bottom, so that explosion bottom is quick-fried
Broken effect is greatly improved；
2, the thrown results of borehole bottom are enhanced
Due to using Application of Sectional Cutting, first group of borehole hole depth is 1.8m, and first group of borehole bottom hole rock debris can easily go out in throwing
Blasthole forms the new scope of freedom, and second group of borehole carries out explosion on the scope of freedom that first group of hole firing is formed, solve by
Borehole bottom landwaste is caused to be difficult to the problem of dishing out in explosion clipping.
3, improve slotting condition
In tunnel piercing, the quality of demolition effect and the quantity of emptying aperture and there is important relationship.In stage cutting method,
It is practical to be increased newly for first group of keyhole detonation due to 1.8m not powder charge before second group of keyhole when one group of keyhole explosion
The scope of freedom and compensation space, increase the slotting effect of first group of keyhole, compared with traditional burn cut, stage slotting is
Loaded hole creates the more scope of freedom and compensation space, significantly improves slotting condition.
Detailed description of the invention
Fig. 1 is borehole schematic layout pattern of the invention；
Fig. 2 is the side sectional view of Fig. 1.
Specific embodiment
A kind of segmented cut shot method as depicted in figs. 1 and 2, comprising the following steps:
Square slotting region 1 is set on tunnel slotting face, and the midpoint on square 1 four side of slotting region is respectively set the
Second group of borehole 3 is respectively set in one group of borehole 2 on the quadrangle in square slotting region 1, at square 1 center of slotting region
Place's setting compensation hole 4；In first group of borehole 1 and second group of 2 bottom hole powder charge of borehole, the aperture of borehole is blocked, first group of borehole 2
Loaded length is 1.2m, and the loaded length of second group of borehole 3 is 1m, the blocking of aperture 5 of first group of borehole 2 and second group of borehole 3
Length is 0.6m；First group of borehole 1 detonates first, and second group of borehole 2 postpones 50ms detonation.
The present invention uses the principle of short-delay blasting, square slotting region 1 is arranged, on four sides in square slotting region 1
With first group of borehole 2 and second group of borehole 3 are set on quadrangle, first group of borehole 2 detonates first, the delay detonation of second group of borehole 3,
Since first group of borehole 2 is in the line center of second group of borehole 3, the minimum burden of first group of borehole 2 is reduced, into one
Step increases the slotting effect of borehole, in order to make the demolition effect of first group of borehole 2 more preferably, at the center in entire slotting region 1
The compensation hole 4 of not powder charge is arranged in position, so that first group of borehole 1, which detonates after detonating for second group of borehole 3, forms enough compensation
Space.
Claims (3)
1. a kind of segmented cut shot method, which comprises the following steps:
A, square slotting region (1) is set on tunnel slotting face, and the midpoint on square (1) four side of slotting region is distinguished
First group of borehole (2) is set, second group of borehole (3) is respectively set on the quadrangle of square slotting region (1), is drawn in square
Compensation hole (4) are set at slot region (1) center；
B, in first group of borehole (1) and second group of borehole (2) bottom hole powder charge, the aperture (5) of borehole is blocked；
C, first group of borehole (1) is detonated first, second group of borehole (2) delay detonation.
2. a kind of segmented cut shot method as described in claim 1, it is characterised in that: the square slotting region (1)
Four side side lengths are 500mm, and the diameter of first group of borehole (2) and second group of borehole (3) is 38mm, the hole depth of first group of borehole (2)
For 1.8m, the hole depth of second group of borehole (3) is 3m, and the diameter of compensation hole (4) is 90mm, and the hole depth of compensation hole (4) is 3.2m, the
The loaded length of one group of borehole (2) is 1.2m, and the loaded length of second group of borehole (3) is 1m, first group of borehole (2) and second group
The aperture stemming length of borehole (3) is 0.6m.
3. a kind of segmented cut shot method as described in claim 1, it is characterised in that: second group of borehole (2) detonation is prolonged
The slow time is 50ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811005397.8A CN109029176A (en) | 2018-08-30 | 2018-08-30 | Sectional type cutting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811005397.8A CN109029176A (en) | 2018-08-30 | 2018-08-30 | Sectional type cutting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109029176A true CN109029176A (en) | 2018-12-18 |
Family
ID=64626359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811005397.8A Pending CN109029176A (en) | 2018-08-30 | 2018-08-30 | Sectional type cutting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109029176A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664761A (en) * | 2020-05-08 | 2020-09-15 | 安徽理工大学 | Cut blasting method based on pre-blasting |
| CN112696997A (en) * | 2020-12-22 | 2021-04-23 | 北京科技大学 | Efficient blasting and tunneling method for vertical shaft |
| CN114413694A (en) * | 2022-01-13 | 2022-04-29 | 北京中煤矿山工程有限公司 | Duplex triangular combined barrel-shaped layered segmented straight-hole cut blasting method |
| CN114812315A (en) * | 2022-06-15 | 2022-07-29 | 甘肃镜铁山矿业有限公司 | Nine-hole straight-hole undermining hole distribution method for cutting and broaching blasting |
Citations (6)
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|---|---|---|---|---|
| JPH0842999A (en) * | 1994-07-28 | 1996-02-16 | Asahi Chem Ind Co Ltd | Blasting method for tunnel |
| CN103063094A (en) * | 2013-02-04 | 2013-04-24 | 山东科技大学 | Channeling method in rapid roadway explosion |
| CN103307941A (en) * | 2013-06-07 | 2013-09-18 | 江西稀有金属钨业控股集团有限公司 | Method for improving tunneling, channeling and blasting effect of mine roadway |
| CN104101270A (en) * | 2014-07-08 | 2014-10-15 | 华侨大学 | Medium-length hole blasting and cutting method in underground construction |
| CN104406470A (en) * | 2014-10-20 | 2015-03-11 | 中国矿业大学(北京) | Deep-hole slotting blasting method for large-diameter freezing shaft in west cretaceous system soft rock area |
| CN104457465A (en) * | 2014-11-26 | 2015-03-25 | 武汉大学 | Deep-buried tunnel blasting excavation effect control method |
-
2018
- 2018-08-30 CN CN201811005397.8A patent/CN109029176A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0842999A (en) * | 1994-07-28 | 1996-02-16 | Asahi Chem Ind Co Ltd | Blasting method for tunnel |
| CN103063094A (en) * | 2013-02-04 | 2013-04-24 | 山东科技大学 | Channeling method in rapid roadway explosion |
| CN103307941A (en) * | 2013-06-07 | 2013-09-18 | 江西稀有金属钨业控股集团有限公司 | Method for improving tunneling, channeling and blasting effect of mine roadway |
| CN104101270A (en) * | 2014-07-08 | 2014-10-15 | 华侨大学 | Medium-length hole blasting and cutting method in underground construction |
| CN104406470A (en) * | 2014-10-20 | 2015-03-11 | 中国矿业大学(北京) | Deep-hole slotting blasting method for large-diameter freezing shaft in west cretaceous system soft rock area |
| CN104457465A (en) * | 2014-11-26 | 2015-03-25 | 武汉大学 | Deep-buried tunnel blasting excavation effect control method |
Non-Patent Citations (1)
| Title |
|---|
| 单仁亮,马军平,赵华,李仁,王晓明,付天会: "分层分段直眼掏槽在石灰岩井筒***中的应用研究", no. 04, pages 636 - 640 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664761A (en) * | 2020-05-08 | 2020-09-15 | 安徽理工大学 | Cut blasting method based on pre-blasting |
| CN111664761B (en) * | 2020-05-08 | 2023-04-18 | 安徽理工大学 | Cut blasting method based on pre-blasting |
| CN112696997A (en) * | 2020-12-22 | 2021-04-23 | 北京科技大学 | Efficient blasting and tunneling method for vertical shaft |
| CN114413694A (en) * | 2022-01-13 | 2022-04-29 | 北京中煤矿山工程有限公司 | Duplex triangular combined barrel-shaped layered segmented straight-hole cut blasting method |
| CN114812315A (en) * | 2022-06-15 | 2022-07-29 | 甘肃镜铁山矿业有限公司 | Nine-hole straight-hole undermining hole distribution method for cutting and broaching blasting |
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Application publication date: 20181218 |
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