CN209672960U - Close on the blasting arrangement in existing operation tunnel - Google Patents
Close on the blasting arrangement in existing operation tunnel Download PDFInfo
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- CN209672960U CN209672960U CN201920010427.8U CN201920010427U CN209672960U CN 209672960 U CN209672960 U CN 209672960U CN 201920010427 U CN201920010427 U CN 201920010427U CN 209672960 U CN209672960 U CN 209672960U
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Abstract
This application provides a kind of blasting arrangements for closing on existing operation tunnel, belong to Tunnel Blasting construction field.The blasting arrangement for closing on existing operation tunnel includes blasting face and inverted arch.The working face in tunnel includes top bar working face, middle stair working face and working face of getting out of a predicament or an embarrassing situation, and top bar working face and middle stair working face offer the first periphery hole and the first keyhole, and the first periphery hole and the first keyhole are used for the first skylight phase explosion.Inverted arch is located at bottom of getting out of a predicament or an embarrassing situation, and inverted arch and working face of getting out of a predicament or an embarrassing situation offer the second periphery hole and the second keyhole, and the second periphery hole and the second keyhole are used in the second skylight phase explosion.Using skylight phase blasting in groups twice, disturbance of each bursting work to existing operation tunnel is reduced.A new scope of freedom can be increased after the first skylight phase is to top bar, middle step operation, the blasthole hole count of ensuing blast construction can be reduced, reduce disturbance of the second skylight phase bursting work to existing operation tunnel.
Description
Technical field
This application involves Tunnel Blasting construction fields, in particular to a kind of explosion knot for closing on existing operation tunnel
Structure.
Background technique
Currently, under conditions of existing Existing operating railway tunnel is normally operated, if separately build new tunnel in its vicinity, to
Built tunnel needs Excavation Blasting operation, needs to fully consider explosion to the safe shadow in existing operation tunnel in blast working
It rings, conventional blasting method operation is larger to the disturbance in existing operation tunnel, unfavorable to the safety in existing operation tunnel.
Utility model content
The embodiment of the present application provides a kind of blasting arrangement for closing on existing operation tunnel, it is intended to reduce blast working to both
There is the disturbance in operation tunnel.
In a first aspect, the embodiment of the present application provides a kind of blasting arrangement for closing on existing operation tunnel, including fireman
Make face and inverted arch.
Wherein, the working face in tunnel includes top bar working face, middle stair working face and working face of getting out of a predicament or an embarrassing situation, top bar
Working face and middle stair working face offer the first periphery hole and the first keyhole, and the first periphery hole is set to the first keyhole
Periphery, the first periphery hole and the first keyhole are used for the first skylight phase explosion.
Inverted arch is located at bottom of getting out of a predicament or an embarrassing situation, and inverted arch and working face of getting out of a predicament or an embarrassing situation offer the second periphery hole and the second slotting
Hole, the second periphery hole are set to the periphery of the second keyhole, and the second periphery hole and the second keyhole are used for quick-fried in the second skylight phase
It is broken.
In this application, it using skylight phase blasting in groups twice, reduces each bursting work and existing operation tunnel is disturbed
It is dynamic.And a new scope of freedom can be increased after the first skylight phase is to top bar, middle step operation, it can reduce subsequent quick-fried
The blasthole hole count of broken construction reduces disturbance of the second skylight phase bursting work to existing operation tunnel.
With reference to first aspect, described to close on existing operation tunnel in the first possible embodiment of first aspect
Blasting arrangement further includes at least one first decompression hole, and each first decompression hole is all set in the first periphery hole and the first keyhole
Between.
First decompression hole is a kind of hole for releasing stress in explosion, inside do not need embedded detonator, in explosion
When, it is possible to reduce the superposition of concussion of blasting and the slungshot that generates.
In the possible embodiment of with reference to first aspect the first, in second of possible embodiment of first aspect,
First decompression hole includes multiple, circumferential direction setting of multiple first decompression holes along the first keyhole.
In order to give full play to the effect of the first keyhole, the first keyhole is usually than other blastholes depth, correspondingly, explosive payload
Greatly.The vibration generated when the first keyhole explosion is larger, by the way that at it, circumferentially setting multiple first decompresses hole, can be greatly decreased
The slungshot generated by concussion of blasting superposition.
With reference to first aspect, described to close on existing operation tunnel in the third possible embodiment of first aspect
Blasting arrangement further includes at least one second decompression hole, each second decompression hole be set to the second periphery hole and the second keyhole it
Between.
Second decompression hole is a kind of hole for releasing stress in explosion, inside do not need embedded detonator, in explosion
When, it is possible to reduce the superposition of concussion of blasting and the slungshot that generates.
In the third possible embodiment with reference to first aspect, in the possible 4th kind of embodiment of first aspect, the
Two decompression holes include multiple, circumferential direction setting of multiple second decompression holes along the second keyhole.
The vibration generated when the second keyhole explosion is larger, by the way that at it, circumferentially setting multiple second decompresses hole, Ke Yi great
Width reduces the slungshot generated by concussion of blasting superposition.
With reference to first aspect, described to close on existing operation tunnel in the 5th kind of possible embodiment of first aspect
Blasting arrangement further includes the first via hole, and the first via hole is set between the first periphery hole and the first keyhole.
The effect of first via hole is the vallecular cavity for expanding the first keyhole and producing, and is that the explosion of the first periphery hole is created favorably
Condition.In construction, medicine and explosion can be filled out into the first via hole in the first skylight phase.
With reference to first aspect, described to close on existing operation tunnel in the 6th kind of possible embodiment of first aspect
Blasting arrangement further includes the second via hole, and the second via hole is set between the second periphery hole and the second keyhole.
The effect of second via hole is the vallecular cavity for expanding the second keyhole and producing, and is that the explosion of the second periphery hole is created favorably
Condition.In construction, medicine and explosion can be filled out into the second via hole in the second skylight phase.
With reference to first aspect, described to close on existing operation tunnel in the 7th kind of possible embodiment of first aspect
Blasting arrangement further includes the first detonator, and the first detonator is embedded in the first periphery hole and the first keyhole.
In this application, the first detonator is embedded in the first periphery hole and the first keyhole is used for top bar working face in
Stair working face can form the new scope of freedom after explosion, can reduce the explosive consumption of get out of a predicament or an embarrassing situation working face and inverted arch.
With reference to first aspect, described to close on existing operation tunnel in the 8th kind of possible embodiment of first aspect
Blasting arrangement further includes the second detonator, and the second detonator is embedded in the second periphery hole and the second keyhole.
Second detonator is embedded in the second periphery hole and the second keyhole is used for working face and the inverted arch of getting out of a predicament or an embarrassing situation, the second detonator
Rock-mass relaxing, fragmentation, facilitate mechanization to excavate after explosion.
With reference to first aspect, in the 8th kind of possible embodiment of first aspect, the first keyhole and the second keyhole
It is inclined-hole cut.
In this application, inclined-hole cut can be with scope of freedom oblique, it is possible to reduce the quantity of keyhole improves explosive and utilizes
Rate.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the application embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the steel for shot figure of the blasting arrangement provided by the embodiments of the present application for closing on existing operation tunnel；
The steel for shot figure of top bar working face in Fig. 2 Fig. 1；
Fig. 3 is the steel for shot figure in the middle stair working face in Fig. 1；
Fig. 4 is the steel for shot figure of the inverted arch in Fig. 1.
Icon: 100- closes on the blasting arrangement in existing operation tunnel；110- top bar working face；The first via hole of 111-；
Stair working face in 130-；The first periphery hole of 131-；The first keyhole of 133-；150- gets out of a predicament or an embarrassing situation working face；170- inverted arch；171-
Second periphery hole；The second keyhole of 173-.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application embodiment clearer, implement below in conjunction with the application
The technical solution in the application embodiment is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is a part of embodiment of the application, rather than whole embodiments.Based on the embodiment in the application, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the application
The range of protection.
Therefore, requirement is not intended to limit to the detailed description of the presently filed embodiment provided in the accompanying drawings below to protect
The scope of the present application of shield, but it is merely representative of the selected embodiment of the application.Based on the embodiment in the application, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the application
The range of protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present application, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
Embodiment
In order to facilitate the blasting arrangement for closing on existing operation tunnel for understanding the embodiment of the present application, first in the art
Technical term makes an explanation.
The skylight phase: refer in route map of train not plot paths of trains or adjustment, pump train operation, to construct and tieing up
The operation reserved time is repaired, is divided into construction skylight and maintenance skylight by purposes.In order to guarantee traffic safety, high-speed railway operation figure
5~6 hours comprehensive maintenance skylights are generally set at night, comprehensive maintenance is carried out to route, signal of communication and power supply unit.
Three benching tunnelling methods: also referred to as three steps, seven footwork is to stay Core Soil as basic model using arc leading pit excavation, it is point upper, in,
Lower three steps, seven excavation faces, the method for tunnel construction that the excavation and support at each position is longitudinally staggered along tunnel, promotes in parallel.
The left and right line in the new tunnel tongue fur Jing Shan is one-tunnel one-track tunnel, is located at the tunnel existing tongue fur Jing Shan two sides, tongue fur well mountain tunnel
Road is in normal operation phase.The new tunnel tongue fur Jing Shan is closer with tongue fur well mountain tunnel distance, inevitable in tunnel excavation blast working
Neighbouring tongue fur well mountain safe operation can be had an impact, and conventional blasting method operational method is larger to the disturbance in the tunnel tongue fur Jing Shan, it is right
The safety in the tunnel tongue fur Jing Shan is unfavorable.
This application provides a kind of blasting arrangements for closing on existing operation tunnel, it is intended to reduce blast working to existing operation
The disturbance in tunnel.
Referring to Fig. 1,10 blasting face of blasting arrangement and inverted arch for closing on existing operation tunnel of the embodiment of the present application
170。
Wherein, the working face in tunnel includes top bar working face 110, middle stair working face 130 and working face of getting out of a predicament or an embarrassing situation
150, top bar working face 110 and middle stair working face 130 offer the first periphery hole 131 and the first keyhole 133, and first
Periphery hole 131 is set to the periphery of the first keyhole 133.
It can excavate to form top bar, middle step and get out of a predicament or an embarrassing situation using three benching tunnelling methods when treating built tunnel and excavating.In
During being somebody's turn to do, machinery can be used to be aided with hand excavation to form top bar, middle step and get out of a predicament or an embarrassing situation.It can use when necessary
The main function of weak blast construction, weak blast construction is exactly to utilize explosion loosening the rock mass, can provide convenience for mechanized construction.
But weak blast construction should try to control explosive consumption, reduce disturbance of the explosion to country rock.It should be noted that weak blast construction
Need to consider country rock grade, the country rock grade for generally using weak blast to construct is IV, V grade of country rock.
Using three benching tunnelling methods excavate after form blasting face accordingly, specifically, top bar, middle step and under
Step is respectively formed with the top bar working face 110 for blast working, middle stair working face 130 and working face of getting out of a predicament or an embarrassing situation
150。
Fig. 2-3 is please referred to, after top bar working face 110 and middle 130 bore operation of stair working face, is worked in top bar
Face 110, middle 130 working face of stair working face are each formed with the first periphery hole 131 and the first keyhole 133, wherein the first periphery
Hole 131 is set to the periphery of the first keyhole 133.
First periphery hole 131 refers to the circle borehole along tunnel perimeter arrangement, is typically situated in the outmost turns in tunnel.First
The effect of periphery hole 131 is to control the shaped profile of tunnel cross-section.In a kind of embodiment of the application, in order to reduce effect
Peak impact pressure on 131 wall of the first periphery hole reduces destruction to country rock around, while when increasing stress wave activity
Between, after the first periphery hole 131 can use air column compartment charge constitution, the first periphery hole 131 to explode simultaneously, while in sky
Evoke the air-shock wave propagated in opposite directions in air column, and collide at air column center, increase stress value, while generating anti-
It penetrates shock wave to propagate in opposite direction, reflects and collide followed by generation again, when increasing percussive pressure force value and stress wave activity
Between, to play the destruction reduced to surrounding rock body.
The effect of first keyhole 133 is in the case where a scope of freedom, and explosion forms vallecular cavity first, is other blastholes
Explosion increase the new scope of freedom, to reduce the clamping action of rock, improve demolition effect.Therefore, the first keyhole 133 is most
The blasthole first detonated.In order to give full play to the effect of the first keyhole 133, the first keyhole 133 can be than other blastholes depth, accordingly
Ground, explosive payload are also big.During tunnel excavation, always bores a small amount of blasthole first on driving face, form one after detonation
A space appropriate, forms the new scope of freedom, makes the rock of rest part around all in order to this direction in space avalanche, with
Preferable demolition effect is obtained, the process for forming this space is commonly referred to as slotting.First keyhole, 133 explosion is in one
Under conditions of the scope of freedom, the condition of fractured rock is extremely difficult, and the quality of slotting directly affects the explosion of other blastholes
Effect, it is therefore necessary to reasonably select undermining type and explosive payload, rock is made to be completely broken to form slotting space and reach higher
First keyhole, 133 utilization rate.
There are many different arrangement forms for first keyhole 133, and inclined-hole cut and straight hole slotting can be divided by being summed up.Its
In, inclined-hole cut is that the first keyhole 133 and the scope of freedom (driving face, face) inclination are angled.First slotting
Hole 133 makes the first keyhole 133 and scope of freedom oblique in the form of tilting slotting aperture, it is possible to reduce the first keyhole
133 quantity improves explosive utilization rate.Illustratively, in the present embodiment, the first keyhole 133 is using inclination slotting.Specifically
Ground, can be using inclination two-stage slotting, wherein the first keyhole of level-one 133 has 6, hole depth 2.1m, and angle is 67 degree；
The first keyhole of second level 133 has 6, hole depth 1.8m, and angle is 57 degree.
In specific setting, inverted arch 170 is located at bottom of getting out of a predicament or an embarrassing situation, and inverted arch 170 and working face 150 of getting out of a predicament or an embarrassing situation offer
Second periphery hole 171 and the second keyhole 173, the second periphery hole 171 are set to the periphery of the second keyhole 173.
In blast working, the first detonator is buried into the first periphery hole 131 and the first keyhole 133.First detonator buries
It is used for set on the first periphery hole 131 and the first keyhole 133 to top bar working face 110 and middle stair working face 130, in explosion
The new scope of freedom can be formed afterwards, can reduce the explosive consumption of get out of a predicament or an embarrassing situation working face 150 and inverted arch 170.
Fig. 1 and Fig. 4 are please referred to, inverted arch 170 is the chief component of tunnel structure, is to improve top supporting construction
Stress condition and the reversed domes that tunnel bottom is arranged in are popular to be construed to the arch faced upward.
After inverted arch 170 and 150 bore operation of working face of getting out of a predicament or an embarrassing situation, in inverted arch 170,150 working face of working face of getting out of a predicament or an embarrassing situation
It is each formed with the second periphery hole 171 and the second keyhole 173, wherein the second periphery hole 171 is set to the second keyhole 173
Periphery.
The technology of second periphery hole 171 and the second keyhole 173 described in the embodiment of the present application, realization principle and generation
Effect and above-mentioned first periphery hole 131 and the first keyhole 133 are identical, and to briefly describe, it will not be described here.
In the present embodiment, the second detonator is buried into the second periphery hole 171 and the second keyhole 173.Second detonator buries
It is used for set on the second periphery hole 171 and the second keyhole 173 to working face 150 and the inverted arch 170 of getting out of a predicament or an embarrassing situation, after the second detonator blasting
Rock-mass relaxing, fragmentation, facilitate mechanization to excavate.
This closes on the blasting arrangement 100 in existing operation tunnel in construction, can use skylight phase at interval in two times into
Row blast working.Illustratively, when existing operation tunnel was in for the first skylight phase, to positioned at top bar working face 110, middle
Medicine and explosion are filled out in the first periphery hole 131 and keyhole of rank working face 130.Firstly, using the first skylight phase, to top bar and
133 explosion of the first periphery hole 131 and the first keyhole of middle step.Due to top bar working face 110, middle stair working face 130
Positioned at the position on opposite upper layer, that is, top bar and middle step top bar working face 110 be located at get out of a predicament or an embarrassing situation working face 150 with
On, sillar is removed after explosion, increases a new scope of freedom for subsequent blast working, it is possible to reduce the blasthole of subsequent construction
Several and dose.
When existing operation tunnel was in for the second skylight phase, the second periphery hole of downward step working face 150, inverted arch 170
171 and second fill out medicine and explosion in keyhole 173.Using the second skylight phase to getting out of a predicament or an embarrassing situation working face 150 and 170 explosion of inverted arch is applied
Work.
In the embodiment of the present application, using skylight phase blasting in groups twice, each bursting work is reduced to existing operation tunnel
The disturbance in road.And one can be increased after the first skylight phase is to top bar working face 110, middle 130 operation of stair working face
The new scope of freedom can reduce the blasthole hole count of ensuing blast construction, reduce the second skylight phase bursting work to existing operation
The disturbance in tunnel.Due to blasting in groups, the blasting arrangement 100 for closing on existing operation tunnel can be suitable for during skylight every compared with
Short situation.For example, being in for the first skylight phase (00:00~00:30) in operation tunnel in a possible embodiment
When, implement the top bar working faces 110 of newly built tunnels, medicine and explosion are filled out in middle stair working face 130；At operation tunnel first day
Interval between window phase and the second skylight phase, complete top bar, middle step ventilation, get rid of the danger, operation of slagging tap, and check leave from office
Rank working face 150, inverted arch 170 explosion before preparation performance；Operation tunnel be in the second skylight phase (04:00~
When 04:30), implement the working faces 150 of getting out of a predicament or an embarrassing situation of newly built tunnels, inverted arch 170 fills out medicine and explosion.Due to using blasting in groups
Construction, even if still being able to complete constructing tunnel requirement in the case where the skylight phase is shorter.
There are close ties between the accumulated damage degree and vibration velocity of country rock.Blast working in tunnel needs to consider
Country rock the accumulative dither effect that generates and is controlled under the effect of frequent close-in blasting, and due to closing on to built tunnel
Existing operation tunnel, it is also desirable to consider the rail facility for not destroying various existing operation tunnels, such as train rail.By a large amount of
Engineering practice, Blasting Vibration Velocity control within 3cm/s can be reduced into explosion to the disturbance of country rock and to rail facility
Interference.
It is controlled under conditions of 3cm/s meeting Blasting Vibration Velocity, it would be desirable to improve blasting efficiency to improve explosion
Drivage efficiency shortens construction period.Maximum single blow blasting charge is indicated in the total dose of maximum that certain allows to detonate in a flash, to control
The adverse effects such as vibration, the shock wave that blast action processed generates.It in the present embodiment, can be described here in embedded detonator
Detonator be exactly above-mentioned first detonator, the second detonator.By gradually extending the length of single detonator, that is, primary
After bursting work, then next separate explosion bury detonator when, increase the length of single detonator.In order to accurately obtain maximum single blow blasting charge
Controlling value, the length for extending single detonator every time is unsuitable too long, otherwise may need more blast working number that could obtain
Maximum single blow blasting charge controlling value.Extend length also unsuitable too long, the maximum single blow blasting charge control otherwise obtained of single detonator every time
Value processed is inaccurate and to obtain maximum single blow blasting charge controlling value as early as possible.In conjunction with a large amount of engineering practice, extend single detonator every time
Length be 10~20cm it is relatively reasonable.
In a kind of possible embodiment, the length for extending single detonator every time is 10~20cm.By this method
Obtain the maximum single blow blasting charge controlling value of single detonator.It should be noted that the length of single detonator increases its dosage also phase
It should increase.
After the maximum single blow blasting charge controlling value for obtaining single detonator, can gradually it be drawn to the first periphery hole 131 and first
The quantity for increasing detonator in slot 133, gradually increases the quantity of detonator into the second periphery hole 171 and the second keyhole 173, from
And improve blast working efficiency.Tests prove that each dose that is incremented by of explosive is when within 1~2Kg, explosion is stablized.Therefore,
It can be 1~2Kg by the explosive consumption of every detonator.
With the increase of explosive consumption, the vibration that explosion generates is also increasing, in order to reduce the disturbance shaken to country rock.
In a kind of specific embodiment, which further includes the first decompression hole, the first solution
Pressure hole is set between the first periphery hole 131 and the first keyhole 133.
First decompression hole is a kind of hole for releasing stress in explosion, inside do not need embedded detonator, in explosion
When, it is possible to reduce the superposition of concussion of blasting and the slungshot that generates.
In specific setting, the first decompression hole include it is multiple, multiple first decompressions hole is set along the circumferential direction of the first keyhole 133
It sets.It has been mentioned hereinbefore that first keyhole 133 can be deeper than other blastholes in order to give full play to the effect of the first keyhole 133,
Correspondingly, explosive payload is also big.The vibration generated when the first 133 explosion of keyhole is larger, by its circumferentially setting multiple first
Hole is decompressed, the slungshot generated by concussion of blasting superposition can be greatly decreased.
Correspondingly, in a kind of specific embodiment, which further includes the
Two decompression holes, the second decompression hole are set between the second periphery hole 171 and the second keyhole 173.
In specific setting, the second decompression hole include it is multiple, multiple second decompressions hole is set along the circumferential direction of the second keyhole 173
It sets.The vibration generated when the second 173 explosion of keyhole is larger, can be substantially by the way that at it, circumferentially setting multiple second decompresses hole
Reduce the slungshot generated by concussion of blasting superposition.
In a kind of possible embodiment, please continue to refer to Fig. 2, blasting arrangement further includes the first via hole 111, and first
Via hole 111 is set between the first periphery hole 131 and the first keyhole 133.
In blast working, medicine and explosion can be filled out into the first via hole 111 in the first skylight phase.First via hole
111 effect is the vallecular cavity for expanding the first keyhole 133 and producing, and is created favorable conditions for the explosion of the first periphery hole 131.First
111 explosive payload of via hole is between 131 explosive payload of the first keyhole 133 and the first periphery hole, optionally, using even powder charge knot
Structure.
In a kind of possible embodiment, blasting arrangement further includes the second via hole, and the second via hole is set to second
Between periphery hole 171 and the second keyhole 173.
Specifically, medicine and explosion can be filled out into the second via hole in the second skylight phase.The effect of second via hole is to expand
The vallecular cavity that big second keyhole 173 is produced creates favorable conditions for the explosion of the second periphery hole 171.Second via hole explosive payload
Between 171 explosive payload of the second keyhole 173 and the second periphery hole, optionally, using even charge constitution.
It should be noted that the tunneling process in tunnel is the process constantly excavated, it is provided by the present application to close on existing operation
The blasting arrangement 100 in tunnel can make full use of the skylight phase in blast working operation, the blast working within the skylight phase, successively divide
Section explosion.That is, Tunnel Blasting construction is the process of a circulation.
As soon as constructing tunnel is a process for multicycle repeatability construction, cyclic advance refers to one that tunnel cross-section excavates
Secondary property circulation construction length.In the process of blast working, the supporting when excavating is needed, once cyclic advance control is improper, for example,
When cyclic advance is excessive, it is easy to cause linked network supporting not catch up with excavation progress, may cause landslide, consequence is extremely serious.At this
In embodiment, cyclic advance is controlled in 0.5~1m, within this range, even if will not send out in the case where supporting not in time
Raw landslide, is tunneled comparatively safe within this range.That is, controlling cyclic advance in 0.5~1m, due to cyclic advance
Smaller, even if supporting not in time, the ambient stress of country rock will not mutate and cause to cave in, and so reduce to branch
The strict demand of shield progress, and reduce landslide risk.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for this field
For technical staff, various changes and changes are possible in this application.Within the spirit and principles of this application, made any
Modification, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of blasting arrangement for closing on existing operation tunnel, which is characterized in that including
Blasting face, the working face in the tunnel include top bar working face, middle stair working face and working face of getting out of a predicament or an embarrassing situation,
The top bar working face and the middle stair working face offer the first periphery hole and the first keyhole, first periphery
It is quick-fried for the first skylight phase that hole is set to the periphery of first keyhole, first periphery hole and first keyhole
It is broken；And
Inverted arch, the inverted arch is located at the bottom of getting out of a predicament or an embarrassing situation, and the inverted arch and the working face of getting out of a predicament or an embarrassing situation offer second week
Lateral opening and the second keyhole, second periphery hole are set to the periphery of second keyhole, second periphery hole and institute
The second keyhole is stated in the second skylight phase explosion.
2. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that the blasting arrangement is also
Including at least one the first decompression hole, each first decompression hole be all set in first periphery hole and the first keyhole it
Between.
3. the blasting arrangement according to claim 2 for closing on existing operation tunnel, which is characterized in that first decompression hole
Including multiple, circumferential direction setting of multiple first decompression holes along first keyhole.
4. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that the blasting arrangement is also
Including at least one the second decompression hole, each second decompression hole be set to second periphery hole and the second keyhole it
Between.
5. the blasting arrangement according to claim 4 for closing on existing operation tunnel, which is characterized in that second decompression hole
Including multiple, circumferential direction setting of multiple second decompression holes along second keyhole.
6. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that the blasting arrangement is also
Including the first via hole, first via hole is set between first periphery hole and first keyhole.
7. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that the blasting arrangement is also
Including the second via hole, second via hole is set between second periphery hole and second keyhole.
8. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that the blasting arrangement packet
The first detonator is included, first detonator is embedded in first periphery hole and first keyhole.
9. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that the blasting arrangement packet
The second detonator is included, second detonator is embedded in second periphery hole and second keyhole.
10. the blasting arrangement according to claim 1 for closing on existing operation tunnel, which is characterized in that first slotting
Hole and second keyhole are inclined-hole cut.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110836115A (en) * | 2019-11-29 | 2020-02-25 | 中铁二十三局集团第四工程有限公司 | Tunnel drilling method adjacent to existing building |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836115A (en) * | 2019-11-29 | 2020-02-25 | 中铁二十三局集团第四工程有限公司 | Tunnel drilling method adjacent to existing building |
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