CN206756613U - A kind of experimental rig for being used to simulate buried Tunnel Rockburst - Google Patents
A kind of experimental rig for being used to simulate buried Tunnel Rockburst Download PDFInfo
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- CN206756613U CN206756613U CN201720508293.3U CN201720508293U CN206756613U CN 206756613 U CN206756613 U CN 206756613U CN 201720508293 U CN201720508293 U CN 201720508293U CN 206756613 U CN206756613 U CN 206756613U
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Abstract
A kind of experimental rig for being used to simulate buried Tunnel Rockburst, including spring-loaded device, test stand, test model and restraint device, the central excavation of test model has the chamber model in definite shape, restraint device is made up of U-shaped restraining plate and two plates, test model is placed in restraint device, and slip casting medium is filled between test model and restraint device；Restraint device is placed in test stand bottom, weighted platform is provided with the top of restraint device, jack is provided with the top of test stand, spring-loaded device is located between weighted platform and jack, spring-loaded device includes spring and the disc spring film being set on spring, each two disc spring film is oppositely arranged, and each two disc spring film is formed one group of elastomer in elliposoidal.The utility model is used as elastic adding carrier by disc spring film, and when test model is loaded into certain stress condition, one of disc spring film in certain group elastomer sends relative upset, realizes the surrouding rock stress unloading of test model.
Description
Technical field
It the utility model is related to the research of rock burst pests occurrence rule, and in particular to a kind of examination for being used to simulate buried Tunnel Rockburst
Experiment device.
Background technology
Rock burst is power destruction phenomenon common in deep-buried underground engineering construction, when the high elastic strain energy built up in rock mass
During the energy consumed more than the rock failure mechanism of rock, the phenomenon that causes rock to burst and eject, be often accompanied by rock mass dish out, loud noise and
Phenomena such as blast.Rock burst often results in the problems such as heavy damage, device damage and casualties of excavated surface, it has also become rock
The global problem of stone underground engineering and rock mechanics field.
The reason for occurring for rock burst, universal viewpoint are as follows：（1）, store very big strain energy, and the portion in rock mass
Energy is divided to exceed the intensity of rock itself；（2）, country rock for fresh complete, crack is few or only hidden crack, and with higher
Fragility and elasticity solid rock；（3）, buried depth is big, underground water is few, easily occur excavated section change causes local stress collection
In area.It should be pointed out that the first two condition is the natural conditions of underground engineering, the 3rd condition is underground engineering construction
Caused stress unloading and redistribution.Above-mentioned condition is summarized, is found when underground engineering is in hard rock-high stress-unloading（Or disturb
It is dynamic）When, the probability that rock burst occurs can increased dramatically.
In order to simulate the generation of rock burst, the rule that rock burst is produced and developed is explored, lot of domestic and international scholar have developed various
Geomechanics model test system.For elastic energy supplement in conventional spring-loaded system and oil-gas Combined Loading system not
The phenomenon of foot, the patent of invention of Application No. 201310425911.4, discloses the simple simulation experiment system of deep-lying tunnel rock burst,
The system is loaded by the resilience of reaction frame leading screw, the shortcomings that overcoming the above method；The hair of Application No. 201310336255.0
Bright patent, the shortcomings that can not simulating rock burst real border condition for conventional pilot system, it is proposed that true triaxial rockburst physics mould
Intend pilot system.The development and improvement of the said equipment, promote the research of Rockburst Problem.But the above method exist one it is common
Shortcoming, it is impossible to the fast discharging of surrouding rock stress before real simulation rock burst occurs.Rock burst is broken as a kind of violent rock power
Bad phenomenon, the development blasting of adjacent chamber easily induce the generation of rock burst, therefore, rock burst generation when developing a kind of " Condition of Sudden Unloading "
Simulation test device is necessary.
Utility model content
The purpose of this utility model is to provide a kind of experimental rig for being used to simulate buried Tunnel Rockburst, and the device can be true
Surrouding rock stress fast discharging when real simulation rock burst occurs.
Used technical scheme is the utility model to achieve the above object：It is a kind of to be used to simulate buried Tunnel Rockburst
Experimental rig, the device include spring-loaded device, test stand, test model and restraint device, and the center of test model is opened
The chamber model having in definite shape is dug, described restraint device is by U-shaped restraining plate and is connected to U-shaped restraining plate two relatively
Two plates composition of exposed end, test model is placed in restraint device, and is filled out between test model and the inwall of restraint device
Filled with slip casting medium；Described restraint device is placed in test stand bottom, and the top of restraint device is provided with weighted platform, test stand top
Portion is provided with the jack being correspondingly arranged with weighted platform, and spring-loaded device is located between weighted platform and jack, described
Spring-loaded device includes spring and the disc spring film being set on spring, and each two disc spring film is oppositely arranged, and makes every
Two disc spring films form one group of elastomer in elliposoidal, when jack is pushed by spring-loaded device and weighted platform
When applying pressure to a certain degree to test model, one of disk spring sector-meeting in certain group elastomer sends relative turn over
Turn, realize the surrouding rock stress unloading of test model.
Wherein, elastomer is at least five groups, and the center of every group of elastomer is connected with being arranged to the spring of tensioning state, and locates
Disc spring film in the elastomer of top and bottom with the upper and lower ends of spring are corresponding respectively is fixedly connected.
In the utility model, test model is poured by gypsum and mica and formed.
Wherein, U-shaped restraining plate by bottom plate and is connected to bottom plate and formed with respect to two side plates of two sides, the side of bottom plate
Edge is provided with the inserting groove for two side plates of grafting；The edge of two side plates is provided with the inserting groove for two plate connections.
Wherein, it is equipped with injected hole on U-shaped restraining plate and two plates.
Wherein, test stand includes being horizontally disposed upper cushion cap and lower cushion cap, and lower cushion cap is placed in below cushion cap, and on
Longitudinal leadscrew is connected between cushion cap and lower cushion cap, above and below upper cushion cap both sides and above and below lower cushion cap both sides longitudinal direction
Fixing bolt is mounted on leading screw.
Wherein, the disc spring film of bottom is fixed on weighted platform in spring-loaded device, the size of weighted platform
Less than the size of the cross section transverse of restraint device.
The utility model is that the essential condition that rock burst occurs for underground engineering is using the principle of spring-loaded device
" Condition of Sudden Unloading ", the mode of jack and disc spring film combination loading, disc spring film are employed in terms of high stress simulation
While test specimen is delivered load to, substantial amounts of elasticity energy itself is also have accumulated, when elasticity can be accumulated to a certain extent, dish
The unexpected upset of shape spring leaf realizes the rock burst condition of " Condition of Sudden Unloading ".
Beneficial effect：For the generation of rock burst, common belief is that：High stress, hard rock and disturbance are rock bursts
Condition；The disc spring film that " upset suddenly " can occur by one kind for the utility model is used as elastic adding carrier, when experiment mould
When type is loaded into certain stress condition, the deformation of disc spring film also reaches critical displacement, then after applying a constant load, relatively
Set a certain sector-meeting in two disc spring films in elliposoidal to overturn, the very fast unloading of spring is caused, so as to meet
The condition that rock burst occurs, while the utility model according to test piece intensity, can also adjust the rigidity of disc spring film, to meet not
With the research of Law of rock burst under country rock.The utility model apparatus structure is simple, test operation is convenient, contributes to rock burst engineering test
With the development of theory.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model；
Fig. 2 is Fig. 1 right direction view；
Fig. 3 is the schematic diagram of restraint device；
Fig. 4 is Fig. 3 top view；
Fig. 5 is the schematic diagram for simulating rock burst under different stress directions；
Fig. 6 is disc spring film fundamental diagram.
Reference：1st, test stand, 2, U-shaped restraining plate, 20, bottom plate, 21, side plate, 3, plate, 4, chamber model, 5 plus
Carrying platform, 6, jack, 7, spring, 8, disc spring film, 9, elastomer, 10, inserting groove, 11, injected hole, 12, upper cushion cap,
13rd, lower cushion cap, 14, longitudinal leadscrew, 15, fixing bolt, 16, test model, 17, centre bore.
Embodiment
Technological means, creation characteristic and the purpose reached to realize the utility model readily appreciate, with reference to
Specific schematic diagram, the utility model content is expanded on further, but the utility model scope claimed is not limited to have
Scope described in body embodiment.
A kind of experimental rig for being used to simulate buried Tunnel Rockburst, as depicted in figs. 1 and 2, the device includes elasticity and loaded
Device, test stand 1, test model 16 and restraint device, the central excavation of test model 16 have the chamber mould in definite shape
Type 4, test stand 1 include being horizontally disposed upper cushion cap 12 and lower cushion cap 13, and lower cushion cap 13 is placed in below cushion cap 12, and on
Longitudinal leadscrew 14 is connected between cushion cap 12 and lower cushion cap 13, about 12 both sides and positioned at lower cushion cap about 13 positioned at upper cushion cap
Fixing bolt 15 is mounted on the longitudinal leadscrew 14 of both sides.
As shown in Figure 3 and Figure 4, restraint device by U-shaped restraining plate 2 and is connected to U-shaped restraining plate 2 with respect to two exposed ends
Two plates 3 form, test model 16 is placed in restraint device, and is filled between test model 16 and the inwall of restraint device
Full slip casting medium, wherein, test model 16 is formed by gypsum and mica by pouring.On U-shaped restraining plate 2 and two plates 3
Provided with for the injected hole of restraint device inside slip casting.
Two sidewall edges being oppositely arranged of U-shaped restraining plate 2 and the edge of the bottom of U-shaped restraining plate 2, which are provided with, to be used to insert
The inserting groove of plugboard 3.Wherein, U-shaped restraining plate 2 by bottom plate 20 and is connected to two side plates of the bottom plate 20 with respect to two sides
21 compositions, the edge of bottom plate 20 are provided with the inserting groove for two plates 3 of grafting；The edge of two side plates 21, which is provided with, supplies two
The inserting groove that plate 3 connects.
In the utility model, restraint device is placed in the bottom of test stand 1, and the top of restraint device is provided with weighted platform 5, experiment
The top of frame 1 is provided with the jack 6 being correspondingly arranged with weighted platform 5, spring-loaded device be located at weighted platform 5 and jack 6 it
Between, described spring-loaded device includes spring 7 and the disc spring film 8 being set on spring 7.
Each two disc spring film 8 is oppositely arranged, and each two disc spring film 8 is formed one group of elastomer in elliposoidal
9, when jack 6, which pushes, to be applied pressure to a certain degree to test model 16 by spring-loaded device and weighted platform 5, certain
One of disc spring film 8 in group elastomer 9 can send relative upset, realize the surrouding rock stress unloading of test model 16.
The disc spring film 8 of bottom is fixed on weighted platform 5 in spring-loaded device, and the size of weighted platform 5, which is less than about, gets one's things ready
The size for the cross section transverse put.Preferably, elastomer 9 is at least five groups, and the center of every group of elastomer 9 is with being arranged to tensioning state
Spring 7 connect, the center of disc spring film 8 is provided with the centre bore 17 for being used for being located on spring 7, and is in top and bottom
Elastomer 9 in disc spring film 8 with the upper and lower ends of spring 7 are corresponding respectively is fixedly connected.
Application example of the present utility model：
（1）, make in the test model 16 that matches with restraint device interior shape, the center of test model 16 is reserved with
The chamber model 4 of its two lateral walls is penetrated, U-shaped restraining plate 2 and two plates 3 are assembled into restraint device, in restraint device
Prefabricated test model 16 is inside put into, and slip casting medium is filled between the outer wall and the inwall of restraint device to test model 16,
The restraint device is placed on test stand 1；In the specific implementation, chamber model 4 can be in the shape such as cylindrical, square, at this
It is square that chamber model 4 is only listed in the accompanying drawing of utility model in bottom, and top is the shape of arcuate structure, perpendicular in simulation
During the stress of straight downwardly direction, the bottom wall of the bottom wall of chamber model 4 and U-shaped restraining plate 2 be arranged in parallel；
（2）, weighted platform 5 and spring-loaded device will be placed on restraint device, pass through 6 time compression elasticities loadings of jack and fill
Put, after the disc spring film 8 in spring-loaded device is overturn suddenly, the burst conditions of viewing test model 16.Wherein, it is dish-shaped
The switching process of spring leaf 8 is as shown in Figure 6.
Wherein, step（1）In, test model 16 can be rotated to an angle, make the bottom wall of chamber model 4 with it is U-shaped about
The bottom wall of beam plate 2 is that the plane where bottom plate 20 is in a certain angle（See the α marked in Fig. 5）, for simulating different stress directions
The generation of lower rock burst.
, can also be by step in the utility model（1）Removal plate is replaced with, the plaster cast poured is polished into necessarily
Shape, making the side wall of test model 16, to set be in certain radian, as shown in figure 5, being used to simulate difference and close in the case of chamber
The generation of rock burst.
The utility model is dashed forward using the special deformation characteristic of disc spring film when being loaded into certain condition to test model
So unloading, meet the condition that rock burst occurs；The utility model can also adjust disk spring rigidity according to test model intensity, from
And the rule that more system research rock burst occurs, the generation of chamber group's rock burst can be simulated, can also simulate rock burst under different stress directions
Generation.
Claims (7)
- A kind of 1. experimental rig for being used to simulate buried Tunnel Rockburst, it is characterised in that：The device includes spring-loaded device, examination Frame, test model and restraint device are tested, the central excavation of test model has the chamber model in definite shape, described constraint Device is by U-shaped restraining plate and is connected to U-shaped restraining plate and is formed with respect to two plates of two exposed ends, and test model is placed in about In bundle device, and slip casting medium is filled between test model and the inwall of restraint device；Described restraint device is placed in experiment Frame bottom, the top of restraint device are provided with weighted platform, the jack being correspondingly arranged with weighted platform, bullet are provided with the top of test stand Property loading device be located between weighted platform and jack, described spring-loaded device includes spring and being set on spring Disc spring film, each two disc spring film are oppositely arranged, and each two disc spring film is formed one group of elasticity in elliposoidal Body, when jack, which pushes, to be applied pressure to a certain degree to test model by spring-loaded device and weighted platform, certain group One of disk spring sector-meeting in elastomer sends relative upset, realizes the surrouding rock stress unloading of test model.
- A kind of 2. experimental rig for being used to simulate buried Tunnel Rockburst according to claim 1, it is characterised in that：Elastomer At least five groups, the center of every group of elastomer is connected with being arranged to the spring of tensioning state, and the elasticity in top and bottom Disc spring film in body with the upper and lower ends of spring are corresponding respectively is fixedly connected.
- A kind of 3. experimental rig for being used to simulate buried Tunnel Rockburst according to claim 1, it is characterised in that：Test mould Type is poured by gypsum and mica and formed.
- A kind of 4. experimental rig for being used to simulate buried Tunnel Rockburst according to claim 1, it is characterised in that：It is U-shaped about Two sidewall edges being oppositely arranged of beam plate and the edge of U-shaped restraining plate bottom are provided with the inserting groove for grafting plate.
- A kind of 5. experimental rig for being used to simulate buried Tunnel Rockburst according to claim 1 or 4, it is characterised in that：It is U-shaped Injected hole is equipped with restraining plate and two plates.
- A kind of 6. experimental rig for being used to simulate buried Tunnel Rockburst according to claim 1, it is characterised in that：Test stand Including being horizontally disposed upper cushion cap and lower cushion cap, lower cushion cap is placed in below cushion cap, and is connected between upper cushion cap and lower cushion cap Longitudinal leadscrew is connected to, is mounted on fixing positioned at both sides above and below upper cushion cap and on the longitudinal leadscrew of both sides above and below lower cushion cap Bolt.
- A kind of 7. experimental rig for being used to simulate buried Tunnel Rockburst according to claim 1, it is characterised in that：Elasticity adds Carry and put the disc spring film of middle bottom and be fixed on weighted platform, the size of weighted platform is less than the transversal disconnected of restraint device The size in face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720508293.3U CN206756613U (en) | 2017-05-09 | 2017-05-09 | A kind of experimental rig for being used to simulate buried Tunnel Rockburst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720508293.3U CN206756613U (en) | 2017-05-09 | 2017-05-09 | A kind of experimental rig for being used to simulate buried Tunnel Rockburst |
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| Publication Number | Publication Date |
|---|---|
| CN206756613U true CN206756613U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720508293.3U Expired - Fee Related CN206756613U (en) | 2017-05-09 | 2017-05-09 | A kind of experimental rig for being used to simulate buried Tunnel Rockburst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206756613U (en) |
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2017
- 2017-05-09 CN CN201720508293.3U patent/CN206756613U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20190509 |