CN203455238U - Simple rockburst simulation test system for deep-buried tunnel - Google Patents
Simple rockburst simulation test system for deep-buried tunnel Download PDFInfo
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- CN203455238U CN203455238U CN201320578343.7U CN201320578343U CN203455238U CN 203455238 U CN203455238 U CN 203455238U CN 201320578343 U CN201320578343 U CN 201320578343U CN 203455238 U CN203455238 U CN 203455238U
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Abstract
The utility model discloses a simple rockburst simulation test system for a deep-buried tunnel. The simple rockburst simulation test system comprises a test piece loading box, a similar-to-trapezoid test piece, a loading oil cylinder, an oil source, a base and reaction steel strands, wherein the test piece loading box also comprises a U-shaped slot, a triangular-prism cushion block, a loading cushion block and a side baffle. The simple rockburst simulation test system can quickly supplement fracture energy to the test piece when the test piece is fractured according to special deformation characteristics of the flexible steel strands so as to meet an occurrence condition of rockburst. The rigidity of the test system disclosed by the utility model can be adjusted according to a test demand, so that the occurrence rule of the rockburst can be researched conveniently and systematically. Part of surrounding rocks in the deep-buried tunnel are tested, so that compared with the conventional full-section model test device, the simple rockburst simulation test system disclosed by the utility model can develop a large-proportional-scale model test. The simple rockburst simulation test system provides a full mechanical principle basis to assist in combination of the test and the theory, and development of the engineering theory is promoted.
Description
Technical field
The utility model relates to the research of deep engineering rock burst pests occurrence rule, particularly relates to the simple and easy simulation experiment system of a kind of deep-lying tunnel rock burst.
Background technology
Rock burst is recurrent a kind of Power geological disaster in the hard rock tunnel construction of high-ground stress area.Because rock burst has a large amount of sillars while occurring and flies out, tend to cause disaster to personnel, equipment, so extremely people's concern of Rockburst Problem.Although Chinese scholars adopts multiple means to Rockburst Problem, done multinomial work, also obtained many achievements, still have at present many problems to wait to research and solve.Research rock burst pests occurrence rule, not only will pass through theoretical analysis, more will explore its essential laws by simulating lab test.
From energy point of view, consider, when interior can reaching capacity that rock burst body absorbs under high stress, country rock is crimp no longer, it just with country rock maintenance equilibrium state.Country rock is crimp again, and it just produces and destroy, and the rapid this destruction of country rock crimp just becomes rock burst.After rock burst body material deformation reaches capacity, country rock redeformation (pushing again), carries out failure energy to rock burst body exactly and supplements.
Above-mentioned viewpoint is enlightened us, in rock burst simulation test, also must carry out supplementing rapidly of failure energy to test specimen.That is to say, make material generation rock burst, just must when material damage, supplement rapidly loading.And will load rapidly, the oil circuit of oil cylinder just must rapid fuel feeding.But conventional oil pressure control system is for process of oil require, this process is much more slowly than the breakdown speed of material, in external work and material, can keep dynamic equilibrium state, with load, increase, damage envelope increases gradually, stops increasing load, destroys and also just stops, cannot make test specimen produce violent rock burst, so must be improved.
In order to realize, test specimen to be supplemented and loaded rapidly, have scholar to propose spring-loaded system and oil-gas compound loading device system.But rigidity and load that spring-loaded system can reach are limited, can not meet the requirement of large-scale experiment, once and complete and can not change again its rigidity to adapt to different test specimens.Oil-gas compound loading device system realizes rapid loading by the quick release of its gaseous tension, but its rigidity is difficult to determine and change rapidly have certain difference with the boundary condition of actual country rock.In addition, Chinese patent 201210093384.7 and 201210102230.X have announced a kind of experimental facilities and method of simulating impingement rock burst, its loading system is common oil pressure loading system, by input disturbance load, simulates rock burst, fails to realize test specimen is supplemented and loaded rapidly.
In addition, also there is a common issue in above-mentioned various experimental facilitiess, the full section of tunnel carried out to simulation test, is subject to the restriction of sample dimensions, and the size that can simulate chamber is less, therefore can not carry out large-scale model test.And rock burst is a kind of violent rock dynamic phenomenon, size effect is larger on experimental result impact, and therefore DeGrain often while carrying out simulated experiment by small specimen can not well study the pests occurrence rule of rock burst.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provides a kind of deep-lying tunnel rock burst simple and easy simulation experiment system.
For achieving the above object, the utility model adopts following technical proposals:
The simple and easy simulation experiment system of deep-lying tunnel rock burst, is characterized in that, comprises that test specimen loads box, the trapezoidal test specimen of class, load cylinder, oil sources, base and counter-force steel strand wires;
Described test specimen loads box, comprises U-shaped groove, triangular prism cushion block, loads cushion block and side shield; U-shaped groove is one-piece construction, comprises base plate and two sidewalls; Two right angle faces of triangular prism cushion block contact with side wall inner surfaces with the base plate of U-shaped groove respectively, and two inclination angle of inclined plane of its inclination angle of inclined plane and the trapezoidal test specimen of class mate; Loading cushion block lower surface is circular arc, contacts with the trapezoidal test specimen upper surface of class, and its first half is extended to both sides, and in both sides, is respectively equipped with the vertical through hole of a row, so that fixing counter-force steel strand wires; Side shield is fixed on the both sides, front and back of U-shaped groove, its role is to prevent the trapezoidal test specimen generation of class axial deformation, to meet the requirement of plane strain state;
The trapezoidal test specimen of described class, upper and lower surface is coaxial circles cambered surface, the extension line of left and right side is by the axis of above-mentioned arc surface, front and back sides is perpendicular to surface level, left and right side contacts with triangular prism cushion block inclined-plane, and front and back sides contacts with side shield inside surface, and four sides and upper surface all scribble lubricant, the shear stress being subject to reduce it, prearrangement of deformation amount space between lower surface and U-shaped trough floor inside surface;
Described load cylinder, one end is supported on base, and the other end loads box to test specimen and exerts pressure; Described oil sources, is connected with load cylinder;
Described counter-force steel strand wires, have two rows, and wherein one end of any one is fixed on base, and the other end is fixed on the loading cushion block of test specimen loading box; According to the rigidity of rock sample test specimen, can adjust steel strand wires number or sectional area and make pilot system there is different rigidity, to carry out the experiment under different condition.
As a kind of optimal way, the utility model also comprises supporting guide, is fixed on base, and its effect is before experiment, to hold test specimen to load box, prevents that test specimen from loading box generation deflection in experimentation.
As a kind of optimal way, the utility model also comprises strain gauge and displacement transducer, and its effect is in experimentation, to monitor test specimen force and deformation situation.
According to test needs, can change the inclination angle on triangular prism cushion block inclined-plane and the shape of loading cushion block curved plate, to mate the trapezoidal test specimen of class of simulating different size.
Principle and advantage of the present utility model is:
Stressed, the deformation and failure problem of deep-lying tunnel country rock can be similar to thinks axisymmetric problem, therefore, gets its part (being the trapezoidal test specimen of class described in the utility model) and tests the character that can reflect country rock integral body; Due to the utility model, only get a part for country rock and analyze, with respect to existing full cross-section model device, can carry out super large-scale model test.
According to current research, think, when test specimen destroys, can produce rapidly certain displacement, conventional test machine loading velocity is limited; The utility model replaces the column of conventional test machine to apply counter-force to test specimen by many counter-force steel strand wires, and when test specimen destroys, counter-force steel strand wires can shrink moment, and test specimen is carried out to supplementing rapidly of failure energy, has met the occurrence condition of rock burst; With respect to spring-loaded system, the counter-force steel strand wires that the utility model adopts can obtain larger rigidity and loading condition, the rigidity of the utility model testing machine can also need to be adjusted according to experiment simultaneously, the pests occurrence rule of more convenient more systematic research rock burst.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
Fig. 1 is mechanics principle figure of the present utility model;
Fig. 2 is agent structure schematic diagram of the present utility model.
Embodiment
By reference to the accompanying drawings 1, the utility model adopts the principle of local test specimen to be, stressed, the deformation and failure problem of deep-lying tunnel country rock can be thought axisymmetric problem; For axisymmetric problem, can get its part, the trapezoidal test specimen 5 of class described in the utility model, tests the character that can reflect country rock integral body.
By reference to the accompanying drawings 2, the simple and easy simulation experiment system of a kind of deep-lying tunnel rock burst, comprises that test specimen loads box, the trapezoidal test specimen 5 of class, load cylinder 6, base 7, counter-force steel strand wires 8, supporting guide 9 and oil sources.
Described test specimen loads box, comprises U-shaped groove 1, triangular prism cushion block 2, loads cushion block 3 and side shield; U-shaped groove 1 is one-piece construction, comprises base plate and two sidewalls; 2 two right angle faces of triangular prism cushion block contact with side wall inner surfaces with the base plate of U-shaped groove 1 respectively, and its inclination angle of inclined plane mates with two inclination angle of inclined plane of the trapezoidal test specimen 5 of class; Loading cushion block 3 lower surfaces is circular arc, contacts with trapezoidal test specimen 5 upper surfaces of class, and its first half is extended to both sides, and in both sides, is respectively equipped with the vertical through hole of a row, so that fixing counter-force steel strand wires 8; Side shield is fixed on the both sides, front and back of U-shaped groove 1, its role is to prevent the trapezoidal test specimen generation of class axial deformation, to meet the requirement of plane strain state.
The trapezoidal test specimen 5 of described class, upper and lower surface is coaxial circles cambered surface, the extension line of left and right side is by the axis of above-mentioned arc surface, front and back sides is perpendicular to surface level, left and right side contacts with triangular prism cushion block 2 inclined-planes, and front and back sides contacts with side shield inside surface, and four sides and upper surface all scribble lubricant, the shear stress being subject to reduce it, prearrangement of deformation amount space between lower surface and U-shaped groove 1 plate inner surface.
Described load cylinder 6, one end is supported on base 8, and the other end loads box to test specimen and exerts pressure; Described oil sources, is connected with load cylinder 6.
Described counter-force steel strand wires 7, have two rows, and wherein one end of any one is fixed on base 8, and the other end is fixed on the loading cushion block 3 of test specimen loading box; According to the rigidity of rock sample test specimen, can adjust steel strand wires number or sectional area and make pilot system there is different rigidity, to carry out the experiment under different condition.
Described supporting guide 9, is fixed on base 8, and its effect is before experiment, to hold test specimen to load box, prevents that test specimen from loading box generation deflection in experimentation.
The above embodiment, is a kind of of the more preferably concrete embodiment of the utility model, and the common variation that those skilled in the art carries out within the scope of technical solutions of the utility model and replacement all should be included in protection domain of the present utility model.
Claims (3)
1. the simple and easy simulation experiment system of deep-lying tunnel rock burst, is characterized in that: comprise that test specimen loads box, the trapezoidal test specimen of class, load cylinder, oil sources, base and counter-force steel strand wires;
Described test specimen loads box, comprises U-shaped groove, triangular prism cushion block, loads cushion block and side shield; U-shaped groove is one-piece construction, comprises base plate and two sidewalls; Two right angle faces of triangular prism cushion block contact with side wall inner surfaces with the base plate of U-shaped groove respectively, and two inclination angle of inclined plane of its inclination angle of inclined plane and the trapezoidal test specimen of class mate; Loading cushion block lower surface is circular arc, and its first half both sides are respectively equipped with the vertical through hole of a row; Side shield is fixed on the both sides, front and back of U-shaped groove;
The trapezoidal test specimen of described class, upper and lower surface is coaxial circles cambered surface, the extension line of left and right side is by the axis of above-mentioned arc surface, front and back sides is perpendicular to surface level, left and right side contacts with triangular prism cushion block inclined-plane, front and back sides contacts with side shield inside surface, and four sides and upper surface all scribble lubricant, prearrangement of deformation amount space between lower surface and U-shaped trough floor inside surface;
Described load cylinder, one end is supported on base, and the other end loads box to test specimen and exerts pressure; Described oil sources, is connected with load cylinder;
Described counter-force steel strand wires, have two rows, and wherein one end of any one is fixed on base, and the other end is fixed on the loading cushion block of test specimen loading box.
2. the simple and easy simulation experiment system of a kind of deep-lying tunnel rock burst according to claim 1, is characterized in that, comprises supporting guide, and is fixed on base.
3. the simple and easy simulation experiment system of a kind of deep-lying tunnel rock burst according to claim 1, is characterized in that, comprises strain gauge and displacement transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578343.7U CN203455238U (en) | 2013-09-18 | 2013-09-18 | Simple rockburst simulation test system for deep-buried tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320578343.7U CN203455238U (en) | 2013-09-18 | 2013-09-18 | Simple rockburst simulation test system for deep-buried tunnel |
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| CN203455238U true CN203455238U (en) | 2014-02-26 |
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| CN201320578343.7U Withdrawn - After Issue CN203455238U (en) | 2013-09-18 | 2013-09-18 | Simple rockburst simulation test system for deep-buried tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471928A (en) * | 2013-09-18 | 2013-12-25 | 山东科技大学 | Simple deeply-buried tunnel rock burst simulation test system |
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- 2013-09-18 CN CN201320578343.7U patent/CN203455238U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471928A (en) * | 2013-09-18 | 2013-12-25 | 山东科技大学 | Simple deeply-buried tunnel rock burst simulation test system |
| CN103471928B (en) * | 2013-09-18 | 2015-09-02 | 山东科技大学 | The simple and easy simulation experiment system of deep-lying tunnel rock burst |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140226 Effective date of abandoning: 20150902 |
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| RGAV | Abandon patent right to avoid regrant |