CN203455151U - Deep tunnel impact earth pressure simulation test system - Google Patents
Deep tunnel impact earth pressure simulation test system Download PDFInfo
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- CN203455151U CN203455151U CN201320577462.0U CN201320577462U CN203455151U CN 203455151 U CN203455151 U CN 203455151U CN 201320577462 U CN201320577462 U CN 201320577462U CN 203455151 U CN203455151 U CN 203455151U
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Abstract
The utility model discloses a deep tunnel impact earth pressure simulation test system which allows a test piece to bear impact load under high pressure condition and rapidly replenishes energy in a test piece destruction process to perform large scale model test. The deep tunnel impact earth pressure simulation test system is characterized by comprising a test piece loading box, a test piece in a shape similar to a trapezoid, a loading oil cylinder, a hydraulic pump station, a base, a counterforce steel strand, a door type framework, an impact weight and a lifting device; the test piece loading box comprises a U-shaped groove, a triangular prism cushion block, a loading cushion block and a side baffle. The deep tunnel impact earth pressure simulation test system only takes a partial surrounding rock for analysis and can perform super large scale model test compared with a full section model test device of prior arts. The deep tunnel impact earth pressure simulation test system applies pressure to a test piece through the loading oil cylinder and the counterforce steel strand and applies impact load to the test piece through the impact weight; the test piece is destroyed under the conditions of high stress and shock disturbance, and in the process, the counterforce steel strand contracts instantly due to the elastic effect, performs supplementary load on the test piece and stimulates the generation condition of impact earth pressure in a better way.
Description
Technical field
The utility model relates to the research of deep coalmine rock burst pests occurrence rule, particularly relates to a kind of deep-lying tunnel rock burst simulation experiment system.
Background technology
Rock burst refers to around colliery roadway or coal face, coal and rock under high-ground stress condition is subject to roof break or blast disturbance destroys, and in destructive process, be subject to the further crushing failure at high speed effect of country rock, instantaneous relase huge energy and produce the mine motive force phenomenon of destruction.Often be attended by the huge sound, coal and rock is thrown to the phenomenons such as digging space and blast, cause the destruction of support apparatus in digging space and the distortion in digging space, when serious, cause casualties and the breaking-up of roadway, even cause surface subsidence and cause local earthquake.
Rock burst is the major issue that mining industry faces, and is having a strong impact on the safety in production of mine, and especially, in during deep mining operation, coal and rock, under condition of high ground stress, is subject to Overlying Strata In A Face fracture disturbance, is easy to occur rock blast hazard.Research rock burst pests occurrence rule, not only will pass through theoretical analysis, more will explore its essential laws by simulating lab test.
According to field observation and theoretical analysis, think, in lab simulation rock burst phenomenon, need meet following three necessary conditions:
by loading, make coal and rock under high-stress state;
coal and rock under condition of high ground stress is applied to impact load, to simulate the impact to tunnel of stress wave that overburden of the goaf fracture causes;
in the process of destroying in coal and rock, supplement rapidly loading, makeup energy, does work to the further extruding of coal and rock to simulate outside country rock.But, also do not have at present equipment can meet above-mentioned three conditions simultaneously, laboratory simulation becomes the bottleneck of the research of rock burst.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of and can make the test specimen load that withstands shocks under condition of high ground stress, and in test specimen destructive process rapid makeup energy, carry out the deep-lying tunnel rock burst simulation experiment system of large scale model test.
For achieving the above object, the utility model adopts following technical proposals:
A deep-lying tunnel rock burst simulation experiment system, is characterized in that, comprises that test specimen loads box, the trapezoidal test specimen of class, load cylinder, hydraulic power unit, base, counter-force steel strand wires, portal frame, impact pouring weight and lifting gear;
Described test specimen loads box, comprises U-shaped groove, triangular prism cushion block, loads cushion block, 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 that 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 provided with vertical through hole 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, front and back sides contacts with side shield inside surface, and four sides all scribble lubricant, the shear stress being subject to reduce it;
Described load cylinder, one end is supported on base, and the other end loads box to test specimen and exerts pressure; Described hydraulic power unit is connected with load cylinder, for it provides oil pressure;
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 by jig;
Described impact pouring weight, for rock sample test specimen is applied to impact load, its weight and highly all adjustable, its axle center and loading cushion block center are on same vertical curve;
Described lifting gear, is fixed on portal frame, for mentioning and discharging, impacts pouring weight.
The utility model can also comprise load and displacement measurement unit, as strain gauge and LVDT extensometer, for measuring test specimen in the displacement of experimentation load and up-and-down boundary generation, and measurement result is sent to servo control unit.
The utility model can also comprise servo control unit, according to user instruction and described load and displacement detecting and controlling unit measurement result controlled loading oil cylinder load and displacement.
The utility model can also comprise orientation measurement device, is fixed on portal frame, and its surface indicates scale, for measuring the height that impacts pouring weight, and prevents from impacting deflection occurs when pouring weight falls.
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.
The utility model can also comprise protective device, for preventing from impacting the danger that pouring weight is toppled over or may cause during the disintegration of rock sample test specimen.
Test method of the present utility model is:
1) make the trapezoidal test specimen of class, put it into test specimen and load box, test specimen is loaded to box installation in position, fixedly counter-force steel strand wires;
2) by load cylinder, test specimen is loaded to box and load, make test specimen meet the requirements of stress state, then keep;
3) adjust height and the weight of impacting pouring weight, then discharge and impact pouring weight, test specimen is loaded to box and impact;
4) mention impact pouring weight, shed load cylinder pressure, unload counter-force steel strand wires, dismantle test specimen and load box, take out test specimen, the destruction situation of record analysis test specimen.
Principle 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.
The utility model is exerted pressure to test specimen by load cylinder and counter-force steel strand wires, makes it under high-stress state, and in this process, counter-force steel strand wires have certain elastic elongation; By impacting pouring weight, test specimen is applied to impact load, the impact of the stress wave causing with the fracture of simulation overburden of the goaf to tunnel, because counter-force steel strand wires are flexible material, can as conventional rigid posts, not impact (buttressing effect) by impact load, realize allowing the withstand shocks target of load of test specimen under specific loading condition; Test specimen destroys under heavily stressed and shock vibration condition, also there is certain displacement in its strength decreased, in this process, the moment contraction of counter-force steel strand wires, supplements rapidly loading to test specimen, be makeup energy, simulated the further extruding acting of outside country rock to coal and rock.
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 4 of class described in the utility model, tests the character that can reflect country rock integral body.
By reference to the accompanying drawings 2, a deep-lying tunnel rock burst simulation experiment system, comprises that test specimen loads box, the trapezoidal test specimen 4 of class, load cylinder 5, hydraulic power unit (not shown), base 6, counter-force steel strand wires 7, supporting guide 8, portal frame 9, impacts pouring weight 10, lifting gear 11, orientation measurement device 1.
Described test specimen loads box, comprises U-shaped groove 1, triangular prism cushion block 2, loads cushion block 3, side shield (not shown); 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 two inclination angle of inclined plane of its inclination angle of inclined plane and the trapezoidal test specimen of class mate; Loading cushion block 3 lower surfaces is that circular arc contacts with trapezoidal test specimen 4 upper surfaces of class, and its first half is extended to both sides, and in both sides, is provided with vertical through hole so that fixing counter-force steel strand wires 7; 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 4 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, front and back sides contacts with side shield inside surface, and four sides all scribble lubricant, the shear stress being subject to reduce it.
Described load cylinder 5, one end is supported on base 6, and the other end loads box to test specimen and exerts pressure; Described hydraulic power unit is connected with load cylinder 5, for it provides oil pressure.
Described counter-force steel strand wires 7, have two rows, and wherein one end of any one is fixed on base 6, and the other end is fixed on the loading cushion block 3 of test specimen loading box by jig.
Described supporting guide 8, is fixed on base 6, and its effect is before experiment, to hold test specimen to load box, prevents that test specimen from loading box generation deflection in experimentation.
Described impact pouring weight 10, for rock sample test specimen is applied to impact load, its weight and highly all adjustable, its axle center and loading cushion block 3 centers are on same vertical curve.
Described lifting gear 11, is fixed on portal frame 9, for mentioning and discharging, impacts pouring weight.
Described orientation measurement device 12, is fixed on portal frame 9, and its surface indicates scale, for measuring the height that impacts pouring weight, and prevents from impacting deflection occurs when pouring weight falls.
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 (6)
1. a deep-lying tunnel rock burst simulation experiment system, is characterized in that, comprises that test specimen loads box, the trapezoidal test specimen of class, load cylinder, hydraulic power unit, base, counter-force steel strand wires, portal frame, impact pouring weight and lifting gear;
Described test specimen loads box, comprises U-shaped groove, triangular prism cushion block, loads cushion block, 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 that circular arc contacts with the trapezoidal test specimen upper surface of class, and both sides are provided with vertical through hole; 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, and front and back sides contacts with side shield inside surface, and four sides all scribble lubricant;
Described load cylinder, one end is supported on base, and the other end loads box to test specimen and exerts pressure;
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 by jig;
Described impact pouring weight, for rock sample test specimen is applied to impact load, its weight and highly all adjustable;
Described lifting gear, is fixed on portal frame, for mentioning and discharging, impacts pouring weight.
2. a kind of deep-lying tunnel rock burst simulation experiment system according to claim 1, is characterized in that, comprises load and displacement measurement unit.
3. a kind of deep-lying tunnel rock burst simulation experiment system according to claim 1, is characterized in that, comprises servo control unit.
4. a kind of deep-lying tunnel rock burst simulation experiment system according to claim 1, is characterized in that, comprises orientation measurement device, is fixed on portal frame, and its surface indicates scale.
5. a kind of deep-lying tunnel rock burst simulation experiment system according to claim 1, is characterized in that, comprises supporting guide, is fixed on base.
6. a kind of deep-lying tunnel rock burst simulation experiment system according to claim 1, is characterized in that, comprises protective device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577462.0U CN203455151U (en) | 2013-09-18 | 2013-09-18 | Deep tunnel impact earth pressure simulation test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577462.0U CN203455151U (en) | 2013-09-18 | 2013-09-18 | Deep tunnel impact earth pressure simulation test system |
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| CN203455151U true CN203455151U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320577462.0U Withdrawn - After Issue CN203455151U (en) | 2013-09-18 | 2013-09-18 | Deep tunnel impact earth pressure simulation test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471801A (en) * | 2013-09-18 | 2013-12-25 | 山东科技大学 | Deep-buried tunnel rock burst simulation test system and testing method thereof |
| CN105043903A (en) * | 2015-06-26 | 2015-11-11 | 黑龙江科技大学 | Rock burst/rock explosion analog simulation energy storage-time tank device |
-
2013
- 2013-09-18 CN CN201320577462.0U patent/CN203455151U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471801A (en) * | 2013-09-18 | 2013-12-25 | 山东科技大学 | Deep-buried tunnel rock burst simulation test system and testing method thereof |
| CN103471801B (en) * | 2013-09-18 | 2015-07-15 | 山东科技大学 | Deep-buried tunnel rock burst simulation test system and testing method thereof |
| CN105043903A (en) * | 2015-06-26 | 2015-11-11 | 黑龙江科技大学 | Rock burst/rock explosion analog simulation energy storage-time tank device |
| CN105043903B (en) * | 2015-06-26 | 2017-07-04 | 黑龙江科技大学 | A kind of bump/rock burst analog simulation energy storage time tank arrangement |
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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: 20150715 |
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| RGAV | Abandon patent right to avoid regrant |