CN106405053A - Air pressure blasting device used for simulating excavation with tunnel drill blasting method - Google Patents
Air pressure blasting device used for simulating excavation with tunnel drill blasting method Download PDFInfo
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Abstract
The invention relates to an air pressure blasting device used for simulating evaluation with a tunnel drill blasting method. The air pressure blasting device comprises a self-boosting liquid nitrogen container, a control panel and two blasting-pipe modules, two SMC high-pressure pressure switches and a control module are arranged in the control panel, the control module is connected with the SMC high-pressure pressure switches respectively through a circuit to control opening and closing of the SMC high-pressure pressure switches, the air outlet of the self-boosting liquid nitrogen container is connected with the SMC high-pressure pressure switches respectively through a high-pressure hose, the SMC high-pressure pressure switches are respectively communicated with the blasting-pipe modules through the high-pressure hose, and air blasting holes are formed in the blasting-pipe modules. The air pressure blasting device has the advantages of simpleness in structure and convenience in use, construction procedure of evaluation with the tunnel drill blasting method can be accurately simulated, simpleness in operation is achieved, safety and reliability in tunnel simulation test process is guaranteed, and the air pressure blasting device can be widely used in similar simulation test of various small-equivalent tunnel blasting excavation.
Description
Technical field
The invention belongs to mechanical models for rock mass rig for testing technical field, excavate particularly to a kind of simulation tunnel drilling and blasting method
Air pressure demolition set.
Background technology
Up to the present, totally seven, the tunnel of more than 10km that China builds or building.Due to distance, geology
Complicated condition, and drill bursting construction has that reduced investment, equipment are compact, adapt to various geological conditions, quick, motor-driven, flexible etc. excellent
Point, therefore these tunnels are most of to adopt traditional drill bursting construction.From the practical situation of China, at very long from now on one section
In time, drill bursting construction is still the main flow that China builds tunnel.Therefore, constantly improve drill bursting construction technology, improves constantly
The drivage efficiency in tunnel has important scientific value and practical significance.
On the basis of the physical simulation experiment of tunnel excavation develops proportioning in analog material, by developing indoor physical simulation
Pilot system realizes the analog simulation from loading, excavation, supporting etc. for the geological model to generalization.Indoor physical simulation test is permissible
By the theory of similarity, drilling and blasting method main construction techniques are reflected in simulation test in that context it may be convenient to set different impact bars
Part, rationally the reflection impact to tunnel excavation for the blasting impact, can lay coherent detection instrument in advance, accurately obtain Wall Rock of Tunnel
Stress-strain data, thus disclosing the failure mechanism to Wall Rock of Tunnel for the Blasting Excavation, the dynamic similarity setting up blast action is theoretical,
The stability of the supporting to Wall Rock of Tunnel simultaneously and control Wall Rock of Tunnel has certain reference.
During method of tunnel drilling and blasting excavates, main construction technology has boring, powder charge, explosion, slagging-off etc..Tunnel
Physical experiments be also required to simulate the precise control of these working procedures, wherein burst pressure and time interval, blasthole can
Row close measure, counter-force counteracting of blasting impact etc. are the technological difficulties of drilling and blasting method Excavation simulation.
At present, in physical simulation experiment, mainly have the preparation of analog material, model test piece loading, tunnel excavation,
The analog simulation processes such as shield, monitoring.The material character of model, the size of model, the diameter of tunnel excavation, loading method, excavation
Method, method for protecting support etc. are more similar to prototype, and the result of simulation test is more reliable, are available for the property used for reference bigger.Carry out both at home and abroad
The analog simulation research that drilling and blasting method excavates is relatively fewer, and main method still adopts little equivalent explosion, but little equivalent explosive
Preparation is difficult to, and similar index has no basis, and blasting experiment has very big danger.
Content of the invention
The technical problem to be solved is the air pressure demolition set providing a kind of simulation tunnel drilling and blasting method to excavate, and has
The defect overcoming prior art of effect.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：The air pressure explosion that a kind of simulation tunnel drilling and blasting method excavates
Device, including from being pressurized liquid nitrogen container, control station and two groups of blasting cartridge modules, has two groups of SMC high-pressures in above-mentioned control station
Switch and control module, above-mentioned control module connects two groups of above-mentioned SMC high-pressure switch respectively by circuit, for controlling respectively
The opening and closing of SMC high-pressure switch processed, the above-mentioned liquid nitrogen container gas outlet of supercharging certainly connects two groups of SMC high pressure respectively by high-pressure hose
Pressure switch, two groups of above-mentioned SMC high-pressure switch connect two groups of above-mentioned blasting cartridge modules by high-pressure hose, on every group respectively
State and air blasting hole is respectively provided with blasting cartridge module.
The invention has the beneficial effects as follows：Structure is simple, easy to use, is capable of the construction of accurate simulation drilling and blasting method excavation
Operation, simple to operate it is ensured that safe and reliable in tunnel simulation test procedure, can be widely applied to the little equivalent of various tunnels quick-fried
Break the analog simulation test dug.
On the basis of technique scheme, the present invention can also do following improvement.
Further, it is provided with switch valve at the above-mentioned liquid nitrogen container gas outlet from supercharging.
It is easy for controlling the output of nitrogen using the beneficial effect of above-mentioned further scheme.
Further, it is provided with pressure-regulating valve with the above-mentioned high-pressure hose connecting from supercharging liquid nitrogen container gas outlet.
It is easy for adjusting the pressure of nitrogen output using the beneficial effect of above-mentioned further scheme.
Further, above-mentioned control station has display screen, be respectively provided with for monitoring in two above-mentioned SMC high-pressure switch
The pressure transducer of gas pressure, above-mentioned pressure transducer passes through connection above-mentioned control module respectively, and will monitor
Pressure information is shown on display screen, when monitoring that at SMC high-pressure switch, gas pressure is higher than setting value, above-mentioned control
Module controls corresponding SMC high-pressure switch to open, conversely, control module controls corresponding SMC high-pressure switch to close.
Beneficial effect using above-mentioned further scheme is easy for the pressure that real-time detection SMC high-pressure switch goes out, with
Just make correct operation, being smoothed out beneficial to blasting experiment, reduce the error of experiment, keep the accuracy of experiment.
Further, every group of above-mentioned blasting cartridge module all includes adapter and multiple air blasting tube assembly, above-mentioned adapter
Inner hollow, above-mentioned adapter connects corresponding above-mentioned SMC high-pressure switch by high-pressure hose respectively, same group many
Individual above-mentioned air blasting tube assembly connects corresponding above-mentioned adapter by high-pressure hose respectively, and above-mentioned air blasting hole is arranged at each
In air blasting tube assembly.
Beneficial effect using above-mentioned further scheme is that blasting cartridge modular structure is simple, easy for installation.
Further, each above-mentioned air blasting tube assembly all includes air-flow core pipe, flange fixed disk, fixing the ring disk and blast hole sealing
Part, said flow core pipe one end connects corresponding above-mentioned adapter by high-pressure hose, and the said flow core pipe other end is closed,
Above-mentioned flange fixed disk be fixed in air-flow core pipe and with above-mentioned fixing the ring disk interval setting, above-mentioned blast hole sealing member is set in gas
Flow outside core pipe and be located at and can move along said flow core pipe between flange fixed disk and fixing the ring disk, and its one end and fixing the ring disk
Be tightly connected, the other end passes through above-mentioned flange fixed disk be fixedly connected with fixture, on above-mentioned blast hole sealing member side by side and
Every being provided with the first foamed silica gel set and the second foamed silica gel set, above-mentioned blast hole sealing member arranges above-mentioned air blasting hole, and above-mentioned
Air blasting hole position covers and the second foamed silica gel set between in the first foamed silica gel, and in said flow core pipe, the position in corresponding air blasting hole sets
There is venthole, above-mentioned venthole is connected with air blasting gas flow hole, when blast hole sealing member is applied with the external force of the fixing the ring disk of direction, on
State the first foamed silica gel set and the second foamed silica gel set is deformed by external force extrusion expansion, above-mentioned blast hole sealing member shrinks, meanwhile, can
By securing the fix on flange fixed disk so that the first foamed silica gel set and the second foamed silica gel set keep expanding shape
State；Conversely, releasing the fixation of fixture and flange fixed disk, the first foamed silica gel set and the second foamed silica gel set recover deformation,
Above-mentioned blast hole sealing member extends return.
Beneficial effect using above-mentioned further scheme is by blast hole sealing member applying external force, realizing before explosion to gas
So that explosion air-flow will not be revealed, total design comparison rationally, and operates fairly simple for the closure at blast hole two ends.
Further, above-mentioned blast hole sealing member also includes support rod mechanism and sleeve pipe, above-mentioned support rod mechanism and sleeve pipe side by side and
Every setting, above-mentioned first foamed silica gel is set between support rod mechanism and sleeve pipe, and its two ends is close with support rod mechanism and sleeve pipe
Envelope connects, and above-mentioned second foamed silica gel set sealing is fixed on one end end that above-mentioned sleeve pipe covers away from the first foamed silica gel, and its
One end and fixing the ring disk away from sleeve pipe are tightly connected, and above-mentioned sleeve pipe is provided through multiple air blasting holes of its side wall, above-mentioned
Support rod mechanism is connected through above-mentioned flange fixed disk and with above-mentioned fixing piece away from one end that the first foamed silica gel covers.
Beneficial effect using above-mentioned further scheme is that blast hole sealing member total is simple, reasonable in design, operation ratio
More convenient, processing technology is also fairly simple.
Further, above-mentioned fixing piece includes fixing shell and lasso, and above-mentioned fixing pipe valve jacket is located at outside said flow core pipe,
Above-mentioned support rod mechanism is fixedly connected with fixing shell away from one end that the first foamed silica gel covers, and above-mentioned lasso is rotatably installed in above-mentioned
Fixing shell is near one end end of flange fixed disk, and has female thread in it, and above-mentioned flange fixed disk periphery is provided with interior
Screw thread, above-mentioned lasso can be threaded connection with flange fixed disk.
Beneficial effect using above-mentioned further scheme is that anchor structure is simple, easy to operate, is easy to fix with flange
Disk is fixed and is dismantled.
Further, above-mentioned support rod mechanism includes mobile dish and at least two struts, and above-mentioned mobile dish are set in said flow
In core pipe, and its one end end is tightly connected with above-mentioned first foamed silica gel set, and above-mentioned strut encloses and is located in said flow core pipe
It is distributed outward and circumferentially, above-mentioned strut is all be arranged in parallel with air-flow core pipe, and its one end all deviates from first with above-mentioned mobile dish
One end end of bubble silica gel sheath is fixedly connected, and the other end is both passed through above-mentioned flange fixed disk and is fixedly connected with fixing shell.
Beneficial effect using above-mentioned further scheme is that support rod mechanism structure is simple, low manufacture cost.
Brief description
Fig. 1 is the structural representation of the air pressure demolition set of simulation tunnel drilling and blasting method excavation of the present invention；
Fig. 2 is the distribution simulating SMC high-pressure switch in the air pressure demolition set that tunnel drilling and blasting method excavates of the present invention
Figure；
Fig. 3 is the structural representation simulating air blasting tube assembly in the air pressure demolition set that tunnel drilling and blasting method excavates of the present invention
Figure；
Fig. 4 is the scattergram of sample and blasthole position.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, from supercharging liquid nitrogen container, 2, control station, 3, blasting cartridge module, 4, SMC high-pressure switch, 11, switch valve, 12,
Pressure-regulating valve, 31, adapter, 32, air blasting tube assembly, 321, air-flow core pipe, 322, flange fixed disk, 323, retainer ring
Disk, 324, blast hole sealing member, 325, fixture, the 3241, first foamed silica gel set, the 3242, second foamed silica gel set, 3243, support
Linkage, 3244, sleeve pipe, 3251, fixing shell, 3252, lasso, 32431, mobile dish, 32432, strut.
Specific embodiment
Below in conjunction with accompanying drawing, the principle of the present invention and feature are described, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
Embodiment：As shown in Figures 1 to 3, the air pressure demolition set that the simulation tunnel drilling and blasting method of the present embodiment excavates is included certainly
Supercharging liquid nitrogen container 1, control station 2 and two groups of blasting cartridge modules 3, have two groups of SMC high-pressure switch 4 Hes in above-mentioned control station 2
Control module, above-mentioned control module connects two groups of above-mentioned SMC high-pressure switch 4 respectively by circuit, for controlling SMC respectively
The opening and closing of high-pressure switch 4, above-mentioned liquid nitrogen container 1 gas outlet of supercharging certainly connects two groups of SMC high pressure pressures respectively by high-pressure hose
Power switch 4, two groups of above-mentioned SMC high-pressure switch 4 pass through high-pressure hose two groups of above-mentioned blasting cartridge modules 3 of connection respectively, every group
It is respectively provided with air blasting hole on above-mentioned blasting cartridge module 3.
In view of being easy to adjust the problem from being pressurized liquid nitrogen container 1 gases at high pressure output, go out from supercharging liquid nitrogen container 1 above-mentioned
Be provided with switch valve 11 at QI KOU, by this switch valve 11 can according to actual flexible experiment needed for gases at high pressure output and
Output state.
In view of being easy to adjust the problem from being pressurized liquid nitrogen container 1 output high-pressure gas pressure, with above-mentioned from supercharging liquid nitrogen container 1
Gas outlet connection high-pressure hose be provided with pressure-regulating valve 12, by this pressure-regulating valve 12 more convenient according to actual experiment
Demand adjusts output high-pressure gas pressure.
Preferably, above-mentioned control station 2 has display screen, be respectively provided with for supervising in two above-mentioned SMC high-pressure switch 4
Survey the pressure transducer of gas pressure, above-mentioned pressure transducer passes through the above-mentioned control module of connection respectively, and will monitor
Pressure information be shown on display screen, when monitoring at SMC high-pressure switch 4 that gas pressure is higher than setting value, above-mentioned
Control module controls corresponding SMC high-pressure switch 4 to open, conversely, control module controls corresponding SMC high-pressure switch
4 closings, can pass through the pressure value Real-time Feedback at two SMC high-pressure switch 4 to control module, and be shown to display screen
On, it is easy to pressure data during experimenter's observation experiment, the accuracy of lifting experiment and safety.
Every group of above-mentioned blasting cartridge module 3 all includes adapter 31 and multiple air blasting tube assembly 32, above-mentioned adapter 31
Inner hollow, above-mentioned adapter 31 connects corresponding above-mentioned SMC high-pressure switch 4 by high-pressure hose respectively, same group
Multiple above-mentioned air blasting tube assembly 32 respectively corresponding above-mentioned adapter 31 is connected by high-pressure hose, above-mentioned air blasting hole is all provided with
Put in each air blasting tube assembly 32, each is imported to by the converted joint 31 of SMC high-pressure switch 4 gases at high pressure out
Carry out air pressure blasting experiment, operation is more convenient in corresponding air blasting tube assembly 32.
Each above-mentioned air blasting tube assembly 32 all includes air-flow core pipe 321, flange fixed disk 322, fixing the ring disk 323 and blast hole
Sealing member 324, said flow core pipe 321 one end connects corresponding above-mentioned adapter 31, said flow core by high-pressure hose
Pipe 321 other end is closed, and above-mentioned flange fixed disk 322 is fixed in air-flow core pipe 321 and is spaced with above-mentioned fixing the ring disk 328 and sets
Put, above-mentioned blast hole sealing member 324 is set in outside air-flow core pipe 321 and is located at can between flange fixed disk 322 and fixing the ring disk 323
Move along said flow core pipe 321, and its one end is tightly connected with fixing the ring disk 323, the other end passes through above-mentioned flange fixed disk
322 and be fixedly connected with fixture 325, on above-mentioned blast hole sealing member 324 side by side and be arranged at intervals with the first foamed silica gel set
3241 and the second foamed silica gel set 3242, above-mentioned blast hole sealing member 324 arranges above-mentioned air blasting hole, and above-mentioned air blasting hole position is in the
Between one foamed silica gel set 3241 and the second foamed silica gel set 3242, in said flow core pipe 321, the position in corresponding air blasting hole sets
There is venthole, above-mentioned venthole is connected with air blasting gas flow hole, outer towards fixing the ring disk 323 when applying to blast hole sealing member 324
During power, above-mentioned first foamed silica gel set 3241 and the second foamed silica gel set 3242 are deformed by external force extrusion expansion, and above-mentioned blast hole is close
Sealing 324 shrinks, meanwhile, can be by fixture 325 being fixed on flange fixed disk 322 so that the first foamed silica gel set
3241 and second foamed silica gel set 3242 remain inflated for；Conversely, releasing the fixation of fixture 325 and flange fixed disk 322,
First foamed silica gel set 3241 and the second foamed silica gel set 3242 recovery deformation, above-mentioned blast hole sealing member 324 extends return.
Above-mentioned blast hole sealing member 324 also includes support rod mechanism 3243 and sleeve pipe 3244, above-mentioned support rod mechanism 3243 and sleeve pipe
3244 arranged side by side and interval settings, above-mentioned first foamed silica gel set 3241 is arranged between support rod mechanism 3243 and sleeve pipe 3244, and
Its two ends is tightly connected with support rod mechanism 3243 and sleeve pipe 3244, and the sealing of above-mentioned second foamed silica gel set 3242 is fixed on above-mentioned set
Pipe 3244 covers 3241 one end end away from the first foamed silica gel, and it is close with fixing the ring disk 323 away from one end of sleeve pipe 3244
Envelope connects, and above-mentioned sleeve pipe 3244 is provided through multiple air blasting holes of its side wall, above-mentioned support rod mechanism 3243 is away from first
One end of bubble silica gel sheath 3241 is passed through above-mentioned flange fixed disk 322 and is connected with above-mentioned fixing piece 325.
Above-mentioned fixing piece 325 includes fixing shell 3251 and lasso 3252, and above-mentioned fixing shell 3251 is set in above-mentioned gas
Outside stream core pipe 321, one end that above-mentioned support rod mechanism 3243 covers 3241 away from the first foamed silica gel is fixing with fixing shell 3251 even
Connect, above-mentioned lasso 3252 is rotatably installed in one end end near flange fixed disk 322 for the above-mentioned fixing shell 3251, and tool in it
There is female thread, above-mentioned flange fixed disk 322 periphery is provided with female thread, and above-mentioned lasso 3252 can be threaded connection with flange fixed disk
On 322.
Above-mentioned support rod mechanism 3243 includes mobile dish 32431 and at least two struts 32432,32431 sets of above-mentioned mobile dish
It is located in said flow core pipe 321, and its one end end is tightly connected with above-mentioned first foamed silica gel set 3241, above-mentioned strut
32432 enclose and are located in said flow core pipe 321 outer and are circumferentially distributed, and above-mentioned strut 32432 is all parallel with air-flow core pipe 321 to be set
Put, and its one end all deviate from above-mentioned mobile dish 32,431 first foamed silica gel set 3241 one end end be fixedly connected, the other end
Both pass through above-mentioned flange fixed disk 322 to be fixedly connected with fixing shell 3251.
Experimentation is as follows：
Step one：As shown in figure 4, using different ratio and the material similar to actual tunnel pours sample, sample pours
During multiple inner ring blastholes and multiple outer rings blasthole are reserved on sample.
Above-mentioned multiple inner ring blasthole and multiple outer rings blasthole are circumferentially distributed respectively, and multiple outer rings blasthole and multiple inner rings
It is in that concentric circular is arranged between blasthole, the circle that the circular diameter that multiple above-mentioned outer rings blasthole is constituted is more than multiple inner ring blastholes compositions is straight
Footpath；
Step 2：Multiple air blasting tube assemblies 32 in one of which blasting cartridge module 3 are inserted multiple inner ring blastholes respectively
Interior, the multiple air blasting tube assemblies 32 in another group of blasting cartridge module 3 are inserted in the blasthole of multiple outer rings respectively.
Step 3：External force towards fixing the ring disk 323 is applied to blast hole sealing member 324, by the transmission of power so that blast hole
The first foamed silica gel set 3241 in sealing member 324 and the second foamed silica gel set 3242 are subject to compression swelling, respectively with corresponding blast hole
Wall closely abuts.
Step 4：Adjust pressure-regulating valve 12 and reach setting pressure, open the switch valve 11 from supercharging liquid nitrogen container 1, high
Body of calming the anger discharges, and first passes through pressure-regulating valve 12 and reaches predetermined pressure.
Step 5：Adjust control station 2, controlled by control module corresponding with the air blasting tube assembly 32 in inner ring blast hole
SMC high-pressure switch 4 is first turned on, and gases at high pressure enter air blasting tube assembly 32, is derived quick-fried to inner ring by corresponding air blasting hole
Hole is impacted, will be quick-fried broken for inner ring " rock ", after separated in time (time interval can set as needed), closes this SMC
High-pressure switch 4, controls another SMC high-pressure switch 4 to open, and gases at high pressure enter the air blasting pipe group in the blast hole of outer ring
In part 32, derived by corresponding air blasting hole and outer ring blast hole is impacted, will be quick-fried broken for inner ring " rock ".
Step 6：Release the connection status of fixture 325 and flange fixed disk 322, and pull out blast hole sealing simultaneously
Part 324, the first foamed silica gel set 3241 and the second foamed silica gel set 3242 recovery deformation are no longer abutted with blast hole wall, by whole gas
Booster assembly 32 pulls out.
Step 7：Manually draw out waste residue, and clear up sample.
Repeat above step, until completing whole blasting works.
Air pressure demolition set and method that the simulation tunnel drilling and blasting method of present invention design excavates, have advantages below：
1) effect to the closure of high pressure draught two ends can be realized using foamed silica gel, prevent gas leakage it is ensured that high pressure gas
The impact effect of stream, has certain security reliability.
2) burst pressure of accurate simulation scene tunnel excavation can with the size of controlled blasting pressure, be capable of, quick-fried for setting up
Broken dynamic similarity is theoretical to provide foundation.
3) interval can be realized to detonate, the construction technology that accurate simulation scene tunnel drilling and blasting method excavates, complete bursting work.
The present invention be capable of accurate simulation drilling and blasting method excavate working procedure, simple to operate it is ensured that tunnel simulation examination
Safe and reliable during testing, can be widely applied to the analog simulation test of various tunnels little equivalent Blasting Excavation.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：It is pressurized liquid nitrogen container (1), control including oneself
Platform (2) processed and two groups of blasting cartridge modules (3), have two groups of SMC high-pressure switch (4) and control mould in described control station (2)
Block, described control module connects SMC high-pressure switch (4) described in two groups respectively by circuit, for controlling SMC high pressure respectively
The opening and closing of pressure switch (4), described liquid nitrogen container (1) gas outlet of supercharging certainly connects two groups of SMC high pressure pressures respectively by high-pressure hose
Power switch (4), SMC high-pressure switch (4) described in two groups respectively pass through high-pressure hose connection two groups described in blasting cartridge module
(3), blasting cartridge module (3) described in every group is respectively provided with air blasting hole.
2. according to claim 1 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：Described
It is provided with switch valve (11) from supercharging liquid nitrogen container (1) gas outlet.
3. according to claim 1 and 2 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：
It is provided with pressure-regulating valve (12) with the described high-pressure hose connecting from supercharging liquid nitrogen container (1) gas outlet.
4. according to claim 1 and 2 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：
On described control station (2), there is display screen, be respectively provided with for monitoring gas pressure in two described SMC high-pressure switch (4)
Pressure transducer, described pressure transducer passes through control module described in connection respectively, and by the pressure information monitoring
It is shown on display screen, when monitoring that SMC high-pressure switch (4) place gas pressure is higher than setting value, described control module
Corresponding SMC high-pressure switch (4) is controlled to open, conversely, control module controls corresponding SMC high-pressure switch (4) to close
Close.
5. according to claim 1 and 2 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：
Blasting cartridge module (3) described in every group all includes adapter (31) and multiple air blasting tube assembly (32), described adapter (31)
Inner hollow, described adapter (31) connects corresponding described SMC high-pressure switch (4) by high-pressure hose respectively, with
One group of multiple described air blasting tube assembly (32) connects corresponding described adapter (31), described gas by high-pressure hose respectively
Blast hole is arranged in each air blasting tube assembly (32).
6. according to claim 5 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：Each
Described air blasting tube assembly (32) all includes air-flow core pipe (321), flange fixed disk (322), fixing the ring disk (323) and blast hole sealing
Part (324), described air-flow core pipe (321) one end connects corresponding described adapter (31), described air-flow by high-pressure hose
Core pipe (321) other end is closed, described flange fixed disk (322) be fixed on air-flow core pipe (321) upper and with described fixing the ring disk
(328) interval setting, described blast hole sealing member (324) be set in air-flow core pipe (321) outward and be located at flange fixed disk (322) and
Can be mobile along described air-flow core pipe (321) between fixing the ring disk (323), and its one end is tightly connected with fixing the ring disk (323), separately
One end passes through described flange fixed disk (322) and is fixedly connected with fixture (325), and described blast hole sealing member (324) is upper side by side
And it is arranged at intervals with the first foamed silica gel set (3241) and the second foamed silica gel set (3242), on described blast hole sealing member (324)
Described air blasting hole is set, and described air blasting hole position in the first foamed silica gel set (3241) and the second foamed silica gel set (3242) it
Between, the position in the upper corresponding air blasting hole of described air-flow core pipe (321) is provided with venthole, and described venthole is connected with air blasting gas flow hole,
When blast hole sealing member (324) is applied with the external force towards fixing the ring disk (323), described first foamed silica gel set (3241) and the
Two foamed silica gel sets (3242) are deformed by external force extrusion expansion, and described blast hole sealing member (324) is shunk, meanwhile, can be by consolidating
Determine part (325) be fixed on flange fixed disk (322) upper so that the first foamed silica gel set (3241) and the second foamed silica gel set
(3242) remain inflated for；Conversely, releasing the fixation of fixture (325) and flange fixed disk (322), the first foamed silica gel set
(3241) and the second foamed silica gel set (3242) recovers deformation, and described blast hole sealing member (324) extends return.
7. according to claim 6 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：Described
Blast hole sealing member (324) also includes support rod mechanism (3243) and sleeve pipe (3244), described support rod mechanism (3243) and sleeve pipe
(3244) side by side and interval setting, described first foamed silica gel set (3241) is arranged on support rod mechanism (3243) and sleeve pipe (3244)
Between, and its two ends is tightly connected with support rod mechanism (3243) and sleeve pipe (3244), described second foamed silica gel set (3242) is close
Sealing is scheduled on one end end away from the first foamed silica gel set (3241) for the described sleeve pipe (3244), and it is away from sleeve pipe (3244)
One end is tightly connected with fixing the ring disk (323), and described sleeve pipe (3244) is provided through multiple air blasting holes of its side wall, described
Support rod mechanism (3243) is through described flange fixed disk (322) and solid with described away from one end of the first foamed silica gel set (3241)
Determine part (325) to be connected.
8. according to claim 7 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：Described
Fixture (325) includes fixing shell (3251) and lasso (3252), and described fixing shell (3251) is set in described air-flow core
Outward, described support rod mechanism (3243) is solid with fixing shell (3251) away from one end of the first foamed silica gel set (3241) for pipe (321)
Fixed connection, described lasso (3252) is rotatably installed in one end end near flange fixed disk (322) for the described fixing shell (3251)
Portion, and in it, there is female thread, described flange fixed disk (322) periphery is provided with female thread, and described lasso (3252) can screw thread
It is connected on flange fixed disk (322).
9. according to claim 8 a kind of simulation tunnel drilling and blasting method excavate air pressure demolition set it is characterised in that：Described
Support rod mechanism (3243) includes mobile dish (32431) and at least two struts (32432), and described mobile dish (32431) are set in
On described air-flow core pipe (321), and its one end end is tightly connected with described first foamed silica gel set (3241), described strut
(32432) enclose that to be located at described air-flow core pipe (321) upper outer and be circumferentially distributed, described strut (32432) all with air-flow core pipe
(321) it be arranged in parallel, and its one end all deviates from one end end of the first foamed silica gel set (3241) with described mobile dish (32431)
It is fixedly connected, the other end is both passed through described flange fixed disk (322) and is fixedly connected with fixing shell (3251).
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| CN109736827A (en) * | 2019-01-11 | 2019-05-10 | 中南大学 | The method that city underground ground consisting of hard rock service channel high pressure gas expansion fracturing is excavated |
| CN112730103A (en) * | 2021-01-19 | 2021-04-30 | 中国科学院西北生态环境资源研究院 | Model test device and test method for simulating blasting excavation of soil tunnel |
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| CN112730103A (en) * | 2021-01-19 | 2021-04-30 | 中国科学院西北生态环境资源研究院 | Model test device and test method for simulating blasting excavation of soil tunnel |
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