CN106289835A - Simulation tunnel off-load controllable type experimental provision and using method thereof - Google Patents
Simulation tunnel off-load controllable type experimental provision and using method thereof Download PDFInfo
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- CN106289835A CN106289835A CN201610614433.5A CN201610614433A CN106289835A CN 106289835 A CN106289835 A CN 106289835A CN 201610614433 A CN201610614433 A CN 201610614433A CN 106289835 A CN106289835 A CN 106289835A
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- high pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
Abstract
The invention discloses a kind of simulation tunnel off-load controllable type experimental provision, including material analog simulation system, impacting with high pressure system and signal processing and analysis system.Impacting with high pressure system is connected with gases at high pressure control system by gases at high pressure conveying pipe.Material analog simulation system is by the mechanical characteristic of roadway surrounding rock after the various STRESS VARIATION of generation can simulate explosion accurately after impacting with high pressure system shock, solve and rely on blasting method to solve many drawbacks of moment off-load experiment at present, simultaneously, a whole set of experimental system dismounting is easy to assembly, it is simple to is repeated several times and carries out experimental simulation.
Description
Technical field
The present invention relates to material properties test field, particularly to one simulation tunnel off-load controllable type experimental provision and
Using method.
Background technology
For a long time, the research to the stress-strain state change of underground roadway surrounding rock, mainly by elastoplasticity power
Instrument, and carry out in the category of continuous medium mechanical model.Because excavation, the stress in tunnel are concentrated and stresses re-distribution,
The region mutually configured successively has been marked off: destruction district, inelastic deformation and the rock mass of tunnel-surrounding around underground passage
" it is undisturbed " district.The scope in these regions, natural stress field and deformation-characteristic strength value by rock mass determine, but for deeply
For portion's engineering, the essence of deep mining is to unload the rock being in high-stress state and the process of energetic disturbance, as
Blasting vibration, macroscopic destruction etc. are all dynamic loading deep rock mass engineering project stability and destruction is that typical sound loads lower rock
Deformation and the problem of destruction.The Blasting Excavation of deep tunnel is different from artificial and mechanization excavation method, shows: on the one hand explosion
Excavation moment country rock is big (more than the stress of primary rock) by explosive load intensity；On the other hand the speed of blasting rock-broken excavation off-load is fast,
Belong to typical transient unloading process (non-quasistatic off-load).Comparatively speaking, the country rock under quasistatic Unloading Effect ruptures research
More, and transient unloading rupture research less.For this problem, need badly and carry out the transient unloading of rock under high-stress state
Experiment, it is thus achieved that the mechanical strength after rock transient unloading and deformation behaviour under high-stress state, seeks rock mass under high-stress state
Damage development after transient unloading and rupture rule, provides certain theory and reality for rock mass transient unloading research after on-the-spot explosion
Test foundation.
At present relevant country rock off-load physical simulating method is to apply shock loading by explosion, but rushing of applying of this mode
Hitting load cannot quantification, it is difficult to accurately, repeat to simulate when impulsion pressure occurs tunnel-surrounding surrounding rock failure process, it is impossible to enough
The unloading process of efficiency test country rock.
Summary of the invention
The technical problem to be solved is to provide a kind of simulation tunnel off-load controllable type experimental provision and use thereof
Method, this device can carry out roadway surrounding rock moment off-load experiment under high-stress state, and after simulating explosion with this, roadway surrounding rock is special
Property also obtains mechanical strength and the deformation behaviour of country rock under heavily stressed unloading condition.
For achieving the above object, the present invention provides following technical scheme: simulate tunnel off-load controllable type experimental provision, bag
Including material analog simulation system, impacting with high pressure system and signal processing and analysis system, described impacting with high pressure system passes through high pressure
Air shooter is connected with gases at high pressure control system, and described material analog simulation system includes the simulation frame of frame-shaped, simulates frame
Inside setting similar materials, described similar materials is identical with required enclosing lithologies, and hole is left at the center of similar materials
Hole, is provided with implant in hole, each material mixture ratio of described implant is consistent with similar materials, the top of described simulation frame
And it being respectively provided on two sides with the jack for simulation loading confined pressure, similar materials passes through jack loaded load；Described
Impacting with high pressure system includes bullet and launches bar, and described bullet, transmitting bar and implant are located along the same line, and three
It is positioned in same level height；The moment that described transmitting bar makes implant unload after clashing into implant, similar materials
By sensor, mechanical strength during similar materials moment unloading implant load and deformation behaviour are sent to signal
In acquisition analysis system.
Preferably, top and the both sides of simulation frame are uniformly provided with four jack respectively.
Preferably, impacting with high pressure system also includes platform, on described platform install an emission cavity, described bullet and send out
Rhizoma Belamcandae is each provided in emission cavity, and transmitting bar is positioned at emission cavity one end near similar materials, and bullet is positioned at emission cavity
The other end, described bullet launched by ballistic projections system drive, and ballistic projections system is connected with the afterbody of emission cavity, described
Penetrating chamber and ballistic projections system is all arranged on platform by bracing frame, described ballistic projections system is carried by gases at high pressure
Pipe is connected with gases at high pressure control system.
Preferably, signal processing and analysis system includes some Acoustic Signal Acquisition devices, some strain acquirement devices, some pressure
Harvester, Acoustic Signal Acquisition device, strain acquirement device, pressure acquisition device are integrated by the signal integrator of respective position respectively,
Three signal integrators Signal Analysis System with signal processing and analysis system the most respectively is connected, described Acoustic Signal Acquisition device,
Strain acquirement device, pressure acquisition device are each provided between similar materials and implant, Acoustic Signal Acquisition device, strain acquirement
Device, the distribution spacing of pressure acquisition device determine according to experiment demand.
Preferably, gases at high pressure control system includes high-pressure nitrogen bottle, gases at high pressure control chamber, gases at high pressure conveying pipe,
Described high-pressure nitrogen bottle is connected with described gases at high pressure control chamber by gases at high pressure conveying pipe, and described gases at high pressure control chamber leads to
Cross gases at high pressure conveying pipe to be connected with ballistic projections system.
The using method of simulation tunnel off-load controllable type experimental provision, comprises the following steps:
(1), according to the requirement of experiment of enclosing lithologies, similar materials is made, in the centre of similar materials
Reserved filling hole；
(2), make the implant identical with the material mixture ratio of similar materials, and implant is positioned over analog simulation
In the hole of material center；
(3), Acoustic Signal Acquisition device, strain acquirement device, pressure acquisition device are fitted into similar materials and filling
Between thing, its distribution spacing can according to experiment it needs to be determined that；
(4), start the jack simulated on frame, similar materials is carried out three-dimensional loading, makes experiment at heavily stressed shape
Carry out under state；
(5), by the quasi-implant of transmitting pole pair of impacting with high pressure system；
(6), by gases at high pressure control chamber control the transmitting of bullet in emission system, complete bullet and rush launching bar
Hitting, launch bar and eject emission cavity, impact implant, implant drops under the percussion launching bar, completes off-load experiment.
Using technique scheme, the present invention compared with prior art, has the advantages that
(1), the present invention applies three-dimensional stress, simulation country rock stress under the condition of high ground stress of deep by loading jack
State, simulates off-load region by the way of in advance reserved analog material implant, utilize high pressure nitrogen to the shock of bullet with
And the percussion that bullet is to transmitting bar, complete the moment impact to analog simulation charges, simulate deep wall rock moment with this
The process of off-load, simulate roadway surrounding rock after explosion mechanical characteristic, solve and rely on blasting method to solve moment at present to unload
Many drawbacks of lotus experiment.
(2), regulate the speed of bullet by operation gases at high pressure control chamber and regulate unloading rate with this；Can also adjust
Joint launches the level angle of bar and implant, makes transmitting bar clash into implant on from different directions, regulates development blasting lane with this
Axis, road angle.
(3), the whole series experimental system of the present invention dismounting is easy to assembly, it is simple to is repeated several times and carries out experimental simulation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the structural representation of material analog simulation system of the present invention；
Fig. 4 is the structural representation of signal processing and analysis system of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, by the description to embodiment, the present invention will be further described:
As shown in Figure 1, 2, the present invention simulates tunnel off-load controllable type experimental provision, including material analog simulation system A, height
Pressure impact system B and signal processing and analysis system D, impacting with high pressure system B is by gases at high pressure conveying pipe 2 and gases at high pressure control
System C processed connects.
As it is shown on figure 3, material analog simulation system A includes the simulation frame 17 of frame-shaped, in simulation frame 17, set analog simulation material
Material 9, similar materials 9 is identical with required enclosing lithologies, and hole is left at the center of similar materials 9, is provided with and fills out in hole
Filling thing 13, each material mixture ratio of implant 13 is consistent with similar materials 9, simulates the top of frame 17 and is respectively provided on two sides with
For the jack 16 of simulation loading confined pressure, similar materials 9 is by jack 16 loaded load.In order to simulate similar mould
Intending having around material 9 enough confined pressures, top and the both sides of simulation frame 17 are uniformly provided with four jack 16 respectively.
Impacting with high pressure system B includes bullet 10 and launches bar 8, and bullet 10 and transmitting bar 8 are each provided at an emission cavity 5
In, in a tubular form, and the internal diameter of emission cavity 5 matches emission cavity 5 with transmitting bar 8 and the diameter of bullet 10, it is ensured that bullet 10 exists
Sealing property during transmitting, thus ensure that bullet 10 clashes into the speed launching bar 8, launch bar 8 and be positioned at emission cavity 5 near similar mould
Intending one end of material 9, bullet 10 is positioned at the other end of emission cavity 5, so can ensure that the rectilinearity of motion.Emission cavity 5 is installed
On a platform 7, bullet 10 is driven by ballistic projections system 4 to be launched, the afterbody phase of ballistic projections system 4 and emission cavity 5
Even, emission cavity 5 and ballistic projections system 4 are all arranged on platform 7 by bracing frame 6, and ballistic projections system 4 passes through high pressure gas
Body conveying pipe 2 is connected with gases at high pressure control system C.The position placed due to platform 7 can be regulated by mobile, therefore originally
Invention can regulate, by the position of regulation platform 7, the incident angle launched when bar 8 clashes into implant 13, in order to truer
The environment simulating development blasting tunnel.
Gases at high pressure control system C includes that high-pressure nitrogen bottle 1, gases at high pressure control chamber 3, gases at high pressure carry pipe 2, high pressure
Nitrogen cylinder 1 is connected with described gases at high pressure control chamber 3 by gases at high pressure conveying pipe 2, and described gases at high pressure control chamber 3 is by height
Pressure air shooter 2 is connected with ballistic projections system 4.Gases at high pressure control chamber 3 can control the incidence rate of bullet 10, and then
Control to launch bar 8 and clash into the speed of implant 13, in order to adapt to the experiment demand under different confined pressure.
Bullet 8, transmitting bar 8 and implant 13 need to be located along the same line, and three is positioned in same level height,
Avoid launching bar 8 motion excursion；Launch the moment that bar 8 makes implant 13 unload after clashing into implant 13, similar materials 9
By sensor, mechanical strength during similar materials 9 moment unloading implant 13 load and deformation behaviour are sent to letter
In number acquisition analysis system D.
As shown in Figure 4, signal processing and analysis system D include 18, two strain acquirement devices 19 of two Acoustic Signal Acquisition devices,
Two pressure acquisition devices 20, Acoustic Signal Acquisition device 18, strain acquirement device 19, pressure acquisition device 20 are respectively by respective position
Signal integrator 14 carries out integrated, it is to avoid the most unordered phenomenon occurs in holding wire, three signal integrators 14 the most respectively with letter
The Signal Analysis System 15 of number acquisition analysis system D connects, Acoustic Signal Acquisition device 18, strain acquirement device 19, pressure acquisition device
20 are each provided between similar materials 9 and implant 13, Acoustic Signal Acquisition device 18, strain acquirement device 19, pressure acquisition device
The distribution spacing of 20 determines according to experiment demand, in order to monitor mechanical strength and the deformation spy of country rock moment off-load back wall rock mass
Levy.
The present invention applies three-dimensional stress by loading jack, simulates country rock stress shape under the condition of high ground stress of deep
State, simulates off-load region by the way of in advance reserved analog material implant, utilize high pressure nitrogen to the shock of bullet and
The bullet percussion to transmitting bar, completes the moment impact to analog simulation charges, simulates deep wall rock moment with this and unload
The process of lotus, solves and relies on blasting method to solve many drawbacks of moment off-load experiment at present；But also can be by operation
Gases at high pressure control chamber regulates the speed of bullet and regulates unloading rate with this；The water launching bar with implant can also be regulated
Straight angle degree, makes transmitting bar clash into implant on from different directions, regulates axis, development blasting tunnel angle with this.
Present configuration is simple, and a whole set of experimental system dismounting is easy to assembly, it is simple to is repeated several times and carries out experimental simulation.
The present invention simulates the using method following steps of tunnel off-load controllable type experimental provision:
(1), according to the requirement of experiment of enclosing lithologies, similar materials 9 is made, at the central part of similar materials 9
The reserved filling hole in position；
(2), make the implant 13 identical with similar materials 9 material mixture ratio, and implant 13 is positioned over similar
In the hole at simulation material 9 center；
(3), Acoustic Signal Acquisition device 18, strain acquirement device 19, pressure acquisition device 20 are fitted into similar materials 9
And between implant 13, its distribution spacing can according to experiment it needs to be determined that；
(4), start the jack 16 simulated on frame 17, similar materials 9 is carried out three-dimensional loading, make experiment answer at height
Carry out under power state；
(5), the transmitting bar 8 of impacting with high pressure system B is directed at implant 13；
(6), by gases at high pressure control chamber 3 control the transmitting of bullet 10 in emission system 4, complete bullet 10 to transmitting
The impact of bar 8, launches bar 8 and ejects emission cavity 5, impact implant 13, and implant 13 drops under the percussion launching bar 8,
Complete off-load experiment.
Above-described is only the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, it is also possible to make some deformation and improvement, these broadly fall into the present invention
Protection domain.
Claims (6)
1. simulation tunnel off-load controllable type experimental provision, including material analog simulation system (A), impacting with high pressure system (B) and
Signal processing and analysis system (D), described impacting with high pressure system (B) controls system by gases at high pressure conveying pipe (2) with gases at high pressure
System (C) connects, it is characterised in that: described material analog simulation system (A) includes the simulation frame (17) of frame-shaped, in simulation frame (17)
If similar materials (9), described similar materials (9) is identical with required enclosing lithologies, the center of similar materials (9)
Leave hole, in hole, be provided with implant (13), each material mixture ratio of described implant (13) and similar materials (9)
Cause, the top of described simulation frame (17) and be respectively provided on two sides with the jack (16) for simulation loading confined pressure, analog simulation
Material (9) passes through jack (16) loaded load；Described impacting with high pressure system (B) includes bullet (10) and launches bar (8), institute
State bullet (8), transmitting bar (8) and implant (13) to be located along the same line, and three is positioned in same level height；Institute
Stating and launch the moment that bar (8) makes implant (13) unload after clashing into implant (13), similar materials (9) passes through sensor
Mechanical strength during similar materials (9) moment unloading implant (13) load and deformation behaviour are sent to signals collecting
In analysis system (D).
Off-load controllable type experimental provision in simulation tunnel the most according to claim 1, it is characterised in that: described simulation frame (17)
Top and both sides be uniformly provided with four jack (16) respectively.
Off-load controllable type experimental provision in simulation tunnel the most according to claim 1, it is characterised in that: described impacting with high pressure system
System (B) also includes platform (7), and described platform (7) is upper installs an emission cavity (5), described bullet (10) and transmitting bar (8) all
It is located in emission cavity (5), and transmitting bar (8) is positioned at emission cavity (5) one end near similar materials (9), bullet (10) position
In the other end of emission cavity (5), described bullet (10) is driven by ballistic projections system (4) to be launched, ballistic projections system (4) with
The afterbody of emission cavity (5) is connected, and described emission cavity (5) and ballistic projections system (4) are all arranged on platform by bracing frame (6)
(7), on, described ballistic projections system (4) is connected with gases at high pressure control system (C) by gases at high pressure conveying pipe (2).
Off-load controllable type experimental provision in simulation tunnel the most according to claim 1, it is characterised in that: described signals collecting is divided
Analysis system (D) includes some Acoustic Signal Acquisition devices (18), some strain acquirement devices (19), some pressure acquisition devices (20), sound
Ripple signal picker (18), strain acquirement device (19), pressure acquisition device (20) are respectively by the signal integrator of respective position
(14) integrated, three signal integrators (14) are connected with the Signal Analysis System (15) of signal processing and analysis system (D) the most respectively,
Described Acoustic Signal Acquisition device (18), strain acquirement device (19), pressure acquisition device (20) are each provided at similar materials (9) and fill out
Fill between thing (13), Acoustic Signal Acquisition device (18), strain acquirement device (19), pressure acquisition device (20) distribution spacing according to reality
The demand of testing determines.
Off-load controllable type experimental provision in simulation tunnel the most according to claim 1, it is characterised in that: described gases at high pressure control
System processed (C) includes high-pressure nitrogen bottle (1), gases at high pressure control chamber (3), gases at high pressure conveying pipe (2), described high-pressure nitrogen bottle
(1) being connected with described gases at high pressure control chamber (3) by gases at high pressure conveying pipe (2), described gases at high pressure control chamber (3) is passed through
Gases at high pressure conveying pipe (2) are connected with ballistic projections system (4).
6. the using method of the simulation tunnel off-load controllable type experimental provision as described in claim 1-5 is arbitrary, it is characterised in that
Comprise the following steps:
(1), according to the requirement of experiment of enclosing lithologies, similar materials (9) is made, at the central part of similar materials (9)
The reserved filling hole in position；
(2), make the implant (13) identical with similar materials (9) material mixture ratio, and implant (13) is positioned over phase
In hole like simulation material (9) center；
(3), Acoustic Signal Acquisition device (18), strain acquirement device (19), pressure acquisition device (20) are fitted into analog simulation material
Between material (9) and implant (13), its distribution spacing can according to testing it needs to be determined that；
(4), start the jack (16) simulated on frame (17), similar materials (9) is carried out three-dimensional loading, makes experiment at height
Carry out under stress state；
(5), the transmitting bar (8) of impacting with high pressure system (B) is directed at implant (13)；
(6), controlled the transmitting of emission system (4) interior bullet (10) by gases at high pressure control chamber (3), complete bullet (10) right
Launching the impact of bar (8), launch bar (8) and eject emission cavity (5), impact implant (13), implant (13) is launching bar (8)
Drop under percussion, complete off-load experiment.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014689A (en) * | 2017-03-20 | 2017-08-04 | 中国矿业大学 | A kind of combination of true triaxial sound plus unloading test system based on Hopkinson pressure bar |
| CN107764658A (en) * | 2017-11-23 | 2018-03-06 | 中南大学 | Simulating two-dimensional loads the experimental rig and method of liquid nitrogen cooling roadway excavation off-load |
| CN109030224A (en) * | 2018-06-01 | 2018-12-18 | 山东科技大学 | A kind of system and method that simulation tunnel promotes off-load |
| CN109932248A (en) * | 2019-02-01 | 2019-06-25 | 天津大学 | A kind of pilot system simulated chamber face under differently stress condition and excavate transient unloading |
| CN110057526A (en) * | 2019-05-30 | 2019-07-26 | 安徽理工大学 | Simulate tunnel experimental bench loaded |
| CN114109499A (en) * | 2021-11-30 | 2022-03-01 | 济宁学院 | Roadway support simulation modeling experiment device based on controllable impact load |
| CN114252356A (en) * | 2021-12-20 | 2022-03-29 | 天津大学 | Multi-line tunnel transient excavation unloading device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014689A (en) * | 2017-03-20 | 2017-08-04 | 中国矿业大学 | A kind of combination of true triaxial sound plus unloading test system based on Hopkinson pressure bar |
| CN107764658A (en) * | 2017-11-23 | 2018-03-06 | 中南大学 | Simulating two-dimensional loads the experimental rig and method of liquid nitrogen cooling roadway excavation off-load |
| CN107764658B (en) * | 2017-11-23 | 2023-08-11 | 中南大学 | Test device and method for simulating two-dimensional loading liquid nitrogen cooling roadway excavation unloading |
| CN109030224A (en) * | 2018-06-01 | 2018-12-18 | 山东科技大学 | A kind of system and method that simulation tunnel promotes off-load |
| CN109932248A (en) * | 2019-02-01 | 2019-06-25 | 天津大学 | A kind of pilot system simulated chamber face under differently stress condition and excavate transient unloading |
| CN110057526A (en) * | 2019-05-30 | 2019-07-26 | 安徽理工大学 | Simulate tunnel experimental bench loaded |
| CN110057526B (en) * | 2019-05-30 | 2024-02-13 | 安徽理工大学 | Experiment table for simulating loading of roadway |
| CN114109499A (en) * | 2021-11-30 | 2022-03-01 | 济宁学院 | Roadway support simulation modeling experiment device based on controllable impact load |
| CN114109499B (en) * | 2021-11-30 | 2023-12-22 | 济宁学院 | Roadway support simulation experiment device based on controllable impact load |
| CN114252356A (en) * | 2021-12-20 | 2022-03-29 | 天津大学 | Multi-line tunnel transient excavation unloading device and method |
| CN114252356B (en) * | 2021-12-20 | 2023-11-07 | 天津大学 | Transient excavation unloading device and method for multi-line tunnel |
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