CN104930937B - Circular divided blasting tunnel construction method capable of effectively controlling blasting vibration velocity - Google Patents
Circular divided blasting tunnel construction method capable of effectively controlling blasting vibration velocity Download PDFInfo
- Publication number
- CN104930937B CN104930937B CN201510081410.8A CN201510081410A CN104930937B CN 104930937 B CN104930937 B CN 104930937B CN 201510081410 A CN201510081410 A CN 201510081410A CN 104930937 B CN104930937 B CN 104930937B
- Authority
- CN
- China
- Prior art keywords
- explosion
- blasting
- carried out
- side wall
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a circular divided blasting tunnel construction method. According to the method, a circular divided blasting manner that the periphery (an upper step portion, a side wall portion and an arch bottom portion) is blasted firstly, and then, a circular middle portion (a central rock stratum portion) is blasted is creatively adopted in the method. According to the method, the blasting safety distance from a surface building is lengthened, the maximum single-segment explosive payload is reduced, and the disturbance to a surrounding rock and the surface building is reduced; and meanwhile the method reduces a rock mass area of blasting each time, shortens work time of each divided portion and is beneficial to stability of a preliminarily-supported structure. Although the number of divided portions is increased, a work surface is increased at the same time, and it can be ensured that devices like a small-type excavator can enter a tunnel face to carry out operation. All the divided portions can be constructed synchronously, the work efficiency is improved, and the construction progress is quickened.
Description
Technical field
The present invention relates to a kind of method for tunnel construction, particularly a kind of ring for being capable of effective control Explosive Vibrating Velocity is quick-fried by several times
Broken method for tunnel construction.
Background technology
At present, the subway of China, constructing tunnel are in construction peak period.In city during Construction of Shallow-Buried Section, surrounding enviroment
It is typically complex, blasting vibration affects larger to construction area, easily causes " disturbing residents " and " people disturb ".Want reduction explosion to apply
Impact of the work to surrounding, just need to provide rational Con trolling index to blasting vibration.And vibration velocity is controlled, do not merely have to strict heavily fortified point
Keep single hop explosive payload and minimize direction, by comprehensive elementary errors mode controlled blasting vibration inside and outside hole.Meanwhile, select rational explosion
Method is even more important.Subway tunnel standard section tunnel excavation has various engineering methods such as benching tunnelling method, CD methods, CRD methods, and quick-fried in needs
It is in broken hard rock tunnel to adopt benching tunneling method more.Traditional explosion is designed：Big gun is carried out according to the cross dimensions of engineering method is selected
Hole arrangement, determines snubber form and periphery hole, reliever firing order, other by calculating single hop explosive payload and rational section
Elementary errors controls vibration velocity.But often because explosion section is excessive, blasting network is complicated, undermining type is multiple in shallow embedding controlled blasting construction
The reason such as miscellaneous, easily occurs that Explosive Vibrating Velocity is exceeded or explosive payload is not enough occurs owing quick-fried problem, is extremely difficult to preferable controlled blasting effect
Really.
The content of the invention
The present invention is, in order to solve the above-mentioned deficiency existing for prior art, to propose that a kind of vibration of base rock is little, be not likely to produce
What is caved in is capable of the ring blasting in groups method for tunnel construction of effective control Explosive Vibrating Velocity.
The present invention technical solution be：A kind of ring blasting in groups constructing tunnel for being capable of effective control Explosive Vibrating Velocity
Method, it is characterised in that：Described blasting construction method is followed the steps below：
A, the outline circle for determining the tunnel for needing blast working first, then by the outline circle with 12 o'clock direction as 0
Point is divided into 360 ° according to clockwise direction, carries out one to the exponent part of appearing on the stage of outline circle in the case where center rock stratum 1 is retained
Secondary detonation, concrete blasting sequence is：Short-delay blasting outside the first area hole is carried out to 270 ° to 330 ° of left part 2 first, then
30 ° to 90 ° of parts of right part 3 carries out short-delay blasting outside the second area hole, and finally 330 ° to 30 ° of vault part 4 is carried out
Time interval outside short-delay blasting outside 3rd area hole, and adjacent hole between short-delay blasting be 100-200mS, each top bar
Part explosion drilling depth 0.5-1m, after the explosion of the exponent part that completes to appear on the stage, carries out supporting in the cavity for eliminating exponent part of appearing on the stage
Process,
B, after the completion of exponent part explosion of appearing on the stage, short-delay blasting outside hole is carried out to the side wall portions of the left and right sides, is often circulated
The adjoining rock stability of drilling depth 1-2m, such as side wall portions, then 6 explosion simultaneously of leftwall part 5 and RightWall part, and often complete twice
The explosion of a side wall portions is carried out after above-mentioned exponent part explosion of appearing on the stage, the country rock of such as side wall portions is unstable, then to the left side
Wall part 5 and RightWall part 6 carry out the outer short-delay blasting of horse-vaulting oral pore, and after often completing once above-mentioned exponent part explosion of appearing on the stage
The explosion of a leftwall part 5 and RightWall part 6 is carried out, after completing the explosion of side wall portions, side wall portions is being eliminated
Cavity in carry out supporting process,
C, to bottom arch points 7 in the hole, empty outer elementary errors combine by the way of carry out explosion, often cyclic advance 1-2m, complete
Into after the explosion of bottom arch point 7, supporting process is carried out in the cavity for eliminating bottom arch point 7,
D, random cloth hole explosion is carried out to center rock stratum 1, and after explosion dregs is directly backfilled in inverted arch, for road
Screed-coat,
According to above-mentioned a to Step d circulate operation, the blast working in tunnel is completed.
The present invention compared with the existing technology, has the advantage that：
This kind of method for tunnel construction, creative adopt first explosion surrounding（Appear on the stage exponent part, side wall portions and arch bottom
Point）, then explosion mid portion（Center rock stratum part）Ring, blasting in groups mode, with slotting small volume, initiation net letter
Single the advantages of, and it is after the completion of the explosion in each stage, will carry out supporting process；This method is little to vibration of base rock,
It is not likely to produce in work progress and caves in.It reduces the position of keyhole by way of ring explosion, increased and earth's surface is built
The safety distance for blasting of thing is built, maximum charge in one delay time is reduced, the disturbance to country rock and surface buildingses is reduced；Simultaneously should
Method also reduces the rock mass area of every separate explosion, shortens the activity duration of each branch, is conducive to a just Stability Analysis of Structures；Though
So this method increased branch, but while also increasing the scope of operation, it can be ensured that the equipment such as Miniature digging machine enters face operation, respectively
Branch can synchronous construction, improve work efficiency, accelerating construction progress.In the geological conditions of " upper soft lower hard ", or a part of rock
This kind of ring blasting in groups construction method is used under conditions of invading tunnel scope, for accelerating construction progress and guarantees that country rock is steady
Surely it is significant.
Description of the drawings
The cross-section structures that need construction tunnel of the Fig. 1 for the embodiment of the present invention.
Top bar drilling and initiation net schematic diagram of the Fig. 2 for the embodiment of the present invention.
Abutment wall drilling and initiation net schematic diagram of the Fig. 3 for the embodiment of the present invention.
Bottom arch drilling and initiation net schematic diagram of the Fig. 4 for the embodiment of the present invention.
Explosive Vibrating Velocity measured data schematic diagrams of the Fig. 5 for the embodiment of the present invention.
Specific embodiment
Below in conjunction with the specific embodiment of the description of the drawings present invention.As shown in Figures 1 to 5：One kind effectively can be controlled
The ring blasting in groups method for tunnel construction of Explosive Vibrating Velocity processed, follows the steps below：
A, the outline circle for determining the tunnel for needing blast working first, then by the outline circle with 12 o'clock direction as 0
Point is divided into 360 ° according to clockwise direction, carries out one to the exponent part of appearing on the stage of outline circle in the case where center rock stratum 1 is retained
Secondary detonation, carries out short-delay blasting outside the first area hole to 270 ° to 330 ° of left part 2, then 30 ° of right sides to 90 ° of parts first
Side part 3 carries out short-delay blasting outside the second area hole, finally carries out elementary errors outside the 3rd area hole to 330 ° to 30 ° of vault part 4 quick-fried
It is broken, and the time interval outside adjacent hole between short-delay blasting is 100-200mS, and appear on the stage exponent part explosion drilling depth 0.5- every time
1m, after the explosion of the exponent part that completes to appear on the stage, carries out supporting process in the cavity for eliminating exponent part of appearing on the stage,
In the explosion of the exponent part that carries out appearing on the stage, its concrete operations data see the table below：
B, after the completion of exponent part explosion of appearing on the stage, short-delay blasting outside hole is carried out to the side wall portions of the left and right sides, is often circulated
The adjoining rock stability of drilling depth 1-2m, such as side wall portions, then 6 explosion simultaneously of leftwall part 5 and RightWall part, and often complete twice
The explosion of a side wall portions is carried out after above-mentioned exponent part explosion of appearing on the stage, the country rock of such as side wall portions is unstable, then to the left side
Wall part 5 and RightWall part 6 carry out the outer short-delay blasting of horse-vaulting oral pore, and after often completing once above-mentioned exponent part explosion of appearing on the stage
The explosion of a leftwall part 5 and RightWall part 6 is carried out, after completing the explosion of side wall portions, side wall portions is being eliminated
Cavity in carry out supporting process,
When the explosion of side wall portions is carried out, its concrete operations data see the table below：
C, to bottom arch points 7 in the hole, empty outer elementary errors combine by the way of carry out explosion, often cyclic advance 1-2m, complete
Into after the explosion of bottom arch point 7, supporting process is carried out in the cavity for eliminating bottom arch point 7,
| Drilling kind | Quantity | Hole depth m | Per hole explosive payload（） | Per hole explosive payload（kg） | Powder charge total amount |
| Main blast hole | 9 | 1.7 | 1.5 | 0.3 | 2.7 |
| Bottom outlet | 11 | 1.7 | 1 | 0.2 | 2.2 |
| It is total | 20 | 4.9 |
D, random cloth hole explosion is carried out to center rock stratum 1, and after explosion dregs is directly backfilled in inverted arch, for road
Screed-coat,
Step pitch in this blasting process between each step is 3-5m.
According to above-mentioned a to Step d circulate operation, the blast working in tunnel is completed.
Safety check：
Explosion design maximum control in tunnel upper house is in 1.0cm/s.
According to formula V=k (Qm/R) α
V----- explosion earthquake safe speeds, cm/s
Q----- one section of explosive payload of maximum, kg
R----- blast areas are to protected object distance, m
M----- dose indexes, take m=1/3
K ----coefficient relevant with explosion site condition, takes k=200
α ----coefficient relevant with geological conditions, takes α=1.8
Fire point is 18m away from office building basis bottom minimum range, and single hop battering charge measures 0.6kg, its safe distance
For：
, meet safety requirements；
Blast working is carried out according to above method, actual measurement vibration velocity is 0.59cm/s, controlling value（1.0cm/s）, meet design
Require.
Claims (1)
1. a kind of ring blasting in groups method for tunnel construction for being capable of effective control Explosive Vibrating Velocity, it is characterised in that：Described is quick-fried
Broken method for tunnel construction is followed the steps below：
Then the outline circle is pressed as 0 by a, the outline circle for determining the tunnel for needing blast working first with 12 o'clock direction
It is divided into 360 ° according to clockwise direction, is retaining center rock stratum（1）In the case of to outline circle exponent part of appearing on the stage carry out once
Detonate, concrete blasting sequence is：Left part first to 270 ° to 330 °（2）Short-delay blasting outside the first area hole is carried out, then
30 ° of right parts to 90 ° of parts（3）Short-delay blasting outside the second area hole is carried out, finally the vault part to 330 ° to 30 °（4）
It is 100-200mS to carry out time interval outside short-delay blasting outside the 3rd area hole, and adjacent hole between short-delay blasting, every time on
Step part explosion drilling depth 0.5-1m, after the explosion of the exponent part that completes to appear on the stage, is carried out in the cavity for eliminating exponent part of appearing on the stage
Supporting is processed,
B, after the completion of exponent part explosion of appearing on the stage, short-delay blasting outside hole is carried out to the side wall portions of the left and right sides, per cyclic advance
The adjoining rock stability of 1-2m, such as side wall portions, then leftwall part（5）With RightWall part（6）Explosion simultaneously, and often complete twice
The explosion of a side wall portions is carried out after above-mentioned exponent part explosion of appearing on the stage, the country rock of such as side wall portions is unstable, then to the left side
Wall part（5）With RightWall part（6）The outer short-delay blasting of horse-vaulting oral pore is carried out, and it is quick-fried often to complete once above-mentioned exponent part of appearing on the stage
A leftwall part is carried out after broken（5）With RightWall part（6）Explosion, after completing the explosion of side wall portions, eliminating
Supporting process is carried out in the cavity of side wall portions,
C, to bottom arch point（7）Explosion is carried out in the hole, by the way of elementary errors combines outside hole, per cyclic advance 1-2m, is completed
Bottom arch point（7）Explosion after, eliminating bottom arch point（7）Cavity in carry out supporting process,
D, to center rock stratum（1）Random cloth hole explosion is carried out, and after explosion dregs is directly backfilled in inverted arch, looked for for road
Flat bed,
According to above-mentioned a to Step d circulate operation, the blast working in tunnel is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081410.8A CN104930937B (en) | 2015-02-15 | 2015-02-15 | Circular divided blasting tunnel construction method capable of effectively controlling blasting vibration velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081410.8A CN104930937B (en) | 2015-02-15 | 2015-02-15 | Circular divided blasting tunnel construction method capable of effectively controlling blasting vibration velocity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104930937A CN104930937A (en) | 2015-09-23 |
| CN104930937B true CN104930937B (en) | 2017-04-19 |
Family
ID=54118216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510081410.8A Active CN104930937B (en) | 2015-02-15 | 2015-02-15 | Circular divided blasting tunnel construction method capable of effectively controlling blasting vibration velocity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104930937B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865281A (en) * | 2016-04-27 | 2016-08-17 | 杨毅 | Method for transverse open excavation controlled blasting construction adjacent to power station and booster station |
| CN107201908B (en) * | 2017-06-16 | 2023-10-31 | 中铁五局集团有限公司 | Construction method for deep-buried central ditch of tunnel in severe cold region |
| CN113803075B (en) * | 2021-09-15 | 2024-05-31 | 中国铁建大桥工程局集团有限公司 | Efficient and environment-friendly tunnel excavation construction method |
| CN114909962B (en) * | 2022-05-23 | 2023-09-08 | 中铁二十二局集团第三工程有限公司 | Construction method for damping and explosion control during tunnel approaching construction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100710410B1 (en) * | 2005-07-14 | 2007-04-24 | 오이환 | Tunnel high speed excavation method |
| KR100923323B1 (en) * | 2007-11-09 | 2009-10-22 | 전남대학교산학협력단 | Blasting method of contour holes in two parts with time delay of 20~25MS |
| CN102042786B (en) * | 2010-11-12 | 2013-03-13 | 中铁十二局集团第二工程有限公司 | Controlled blasting construction method for shallow-buried large-section tunnel |
| CN102220868B (en) * | 2011-05-23 | 2013-06-19 | 重庆中环建设有限公司 | Urban shallow buried large-section tunnel five-step excavating method |
| CN104047623B (en) * | 2014-06-06 | 2016-07-13 | 同济大学 | A kind of big across cavern excavation construction method |
-
2015
- 2015-02-15 CN CN201510081410.8A patent/CN104930937B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104930937A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104930937B (en) | Circular divided blasting tunnel construction method capable of effectively controlling blasting vibration velocity | |
| CN105781560B (en) | A kind of construction method of the remote base tunnel look-ahead explosion in super low coverage superimposing thread tunnel | |
| CN111043926B (en) | 400m is realized based on electron detonator2Blasting excavation method for tunnel with large cross section | |
| CN104482815A (en) | Tunnel smooth blasting method | |
| CN104532818A (en) | Treatment method for strip mine goaf | |
| CN110879026B (en) | Excavation and cut blasting method suitable for high-plasticity low-strength rock tunnel | |
| CN107024154A (en) | High slope deep hole blasting construction method under a kind of complex environment | |
| CN102692164B (en) | Stress unloading, water injecting and drilling and blasting method for longitudinal structure surface structural strong rockburst regions | |
| CN106247877A (en) | A kind of hypervelocity forces kerve method without cutting hole deviation line symmetry | |
| CN108489348B (en) | A kind of deep hole and the knockdown hard rock air bench blasting method of short-bore | |
| CN103075933A (en) | Large-wedge-shaped multi-repeated cutting groove construction process | |
| CN104482817B (en) | A kind of deep-lying tunnel stress relieving presplit blasting method | |
| CN106761745A (en) | The outer sublevel open stope method of arteries and veins | |
| CN111023930B (en) | Tunnel step excavation method | |
| CN105865281A (en) | Method for transverse open excavation controlled blasting construction adjacent to power station and booster station | |
| CN106545344B (en) | A kind of Karst area tunnel wall-hanging country rock face blast excavation method | |
| CN103557001A (en) | Low-section-height drift-pillar-free shrinkage-stoping, subsequent-filling and mining method | |
| CN209230424U (en) | A kind of compound burn cut | |
| CN109539915B (en) | Cutting raise blasting construction method | |
| CN111102892A (en) | Wedge-shaped cut blast hole arrangement method suitable for blasting excavation of deep-buried tunnel | |
| CN101493305A (en) | Damping blasting method for tunnel diggin | |
| CN102980453B (en) | Water injection drilling and blasting method for unloading stress of structural strong rock burst area of horizontal structural surface | |
| CN112432566A (en) | Full-section rapid excavation method for large-section tunnel | |
| CN209623525U (en) | The steel for shot structure of roadway development blasting | |
| CN107036495A (en) | Hyperboloid of one sheet reaming chock blasting method from the bottom of one's heart |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |