CN204008301U - A kind of testing table of testing anchor pole axial load and axial deformation - Google Patents
A kind of testing table of testing anchor pole axial load and axial deformation Download PDFInfo
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- CN204008301U CN204008301U CN201420358378.4U CN201420358378U CN204008301U CN 204008301 U CN204008301 U CN 204008301U CN 201420358378 U CN201420358378 U CN 201420358378U CN 204008301 U CN204008301 U CN 204008301U
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Abstract
The utility model relates to mine support technical field, has been specifically related to a kind of testing table of testing anchor pole axial load and axial deformation.In the work test board of this testing table, be provided with the boring model for anchoring rod, anchor pole one end is anchored in boring model, on the end face that the other end tray of anchor pole fastening nut are fixed on impact beam; Stretching back timber thrusting action under the drive of driving mechanism, in impact beam, is out of shape so that anchor pole bears axial tension load and axial tension occurs; Load sensor is between impact beam and stretching back timber, and for testing axial tension load, displacement transducer is installed on respectively the two ends of anchor pole, for testing axial deflection.This testing table is realized the test to bolt supporting process axial force and axial deformation in laboratory, for the Design of bolt support under anchor rod supporting theory research and complex stress condition provides foundation, to the research of in-depth bolt support mechanism, guarantee that engineering safety is significant.
Description
Technical field
The utility model relates to mine support technical field, relates in particular to a kind of testing table of testing anchor pole axial load and axial deformation.
Background technology
At present, bolt supporting has become coal mine roadway main support pattern safely and efficiently, in China's coal-mine tunnel, obtains large scale application.Bolt supporting be by anchor rod anchored in coal and rock, tighten bar tail nut, country rock is applied to prestress, the distortion absciss layer of constraint roadway surrounding rock, broken swollen and the slippage changing of the relative positions.
In bolt supporting work progress, during tray fastening nut, in anchor bar body, form primitive axis to tensile load, and produce initial axial deformation.After rockbolt installation completes, in Bracing Process, during surrounding rock separation layer bulking deformation, the axial tension load that anchor pole bears and axial deflection increase.In addition, boring that surrouding rock deformation causes destroys, and affects anchor rod anchored section stable, even causes anchor pole along borehole axial, sliding under certain Axial Loads.The axial load that the body of rod bears or axial deformation reach body of rod ultimate bearing capacity or ultimate deformation amount, are the final principal modes destroying of anchor pole.Research bolt supporting process is born axial load and axial deformation performance, to the research of in-depth bolt support mechanism, improves bolt supporting reliability, guarantees that engineering safety is significant.
The method that research anchor pole bears xial feed and axial deformation performance mainly contains two large classes: underground trials and laboratory examination.
The axially loaded of the anchor pole of underground trials test, comprised under the various complex external force effects such as shear-type load, bending load, the total axial load forming in the body of rod, can only reflect that total axial stress that anchor pole forms under various stress resultant effects or line shaft are to magnitude of load, real load cannot be distinguished to the mode of action of anchor pole and amplitude, broken body of rod axial load when swollen of surrounding rock separation layer can not be tested.Because not taking out the anchor pole being anchored in country rock, can only test the distortion that shifts near rock stratum, component analysis supporting district of roadway surrounding rock, the practical distortion that cannot test anchor pole.In addition, due to the special environment in down-hole, the monitoring method that some are advanced and the application of instrument are also restricted, and the anchor pole limited amount that can monitor, representative not enough.
The current Main Basis test standard of laboratory examination is carried out the tension test of anchor rod body material test specimen, and the test axial bearing capacity of anchor pole and the body of rod axial deformation of drawing process, although the data of test are accurate, can reflect the basic mechanical performance of anchor pole material.But shop experiment only reflects anchor pole mechanics of materials index, cannot simulate bolt supporting process in broken axially loaded situation when swollen of surrounding rock separation layer, also cannot test out axial bearing capacity and the actual axial deformation of bolt supporting process.
Therefore,, for above deficiency, needs are a kind of can be at the testing table of experiment lab simulation rockbolt installation and course of work axially loaded and distortion.
Utility model content
(1) technical matters that will solve
The technical problems to be solved in the utility model has been to provide a kind of testing table of testing anchor pole axial load and axial deformation, make can simulate rockbolt installation and course of work axially loaded and change and distortion in laboratory, and can test out accurately and effectively axially loaded and the axial deformation process after anchor rod anchored.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of testing table of testing anchor pole axial load and axial deformation, this testing table comprises the anchor pole for mine support, this testing table also comprises work test board, stretching device, driving mechanism, load sensor and displacement transducer, in described work test board, be provided with the boring model for anchoring rod, described stretching device comprises impact beam and stretching back timber, described anchor pole one end is anchored in boring model, and the other end is fixed on the end face of impact beam; Described stretching back timber thrusting action under the drive of driving mechanism, in impact beam, is out of shape so that described anchor pole bears axial tension load and axial tension occurs; Described load sensor is between impact beam and stretching back timber, and for testing described axial tension load, described displacement transducer is installed on respectively the two ends of anchor pole, for testing described axial deflection.
Wherein, described driving mechanism is two oil cylinders, described oil cylinder is arranged on work test board by frame, and the piston rod of described oil cylinder is fixedly connected with stretching back timber, for driving described stretching back timber along the axial thrusting action of anchor pole in described impact beam, described impact beam drives described anchor pole to produce axial tension load and axial tension distortion occurs.
Wherein, described oil cylinder is symmetricly set in the both sides of boring model, and the piston rod of described oil cylinder is parallel with the axis of boring model.
Wherein, described anchor pole through impact beam and stretching back timber and be anchored in boring model in, by nut, pallet, the spherical washer locking of aligning on the end face of impact beam.
Wherein, described anchor pole bonds by Anchor Agent and the coal and rock physical model that forms boring model.
Wherein, described displacement transducer is installed on the two ends of anchor pole by outside support.
Wherein, the quantity of described displacement transducer is two, and described in one of them, displacement transducer is positioned at the boring model exposed junction of anchor pole, and is connected with anchor pole end face center; Described in another, displacement transducer is positioned at the bottom, boring model hole of anchor pole, and is connected with anchor pole end face center through even twisting moment center sensor hole.
(3) beneficial effect
Technique scheme of the present utility model has following beneficial effect: the testing table of the utility model test anchor pole axial load and axial deformation makes can simulate anchor rod anchored rear installation pretension in laboratory and course of work anchor pole axially loaded changes and distortion, and can test out accurately and effectively anchor rod anchored rear axial bearing capacity and axial deformation performance; By load sensor being installed between impact beam and stretching back timber, for testing the normal pressure between impact beam and stretching back timber.Displacement transducer is installed on the two ends of anchor pole, for testing the displacement of anchor pole end, by two displacement algebraically read group total draw bolt shaft to absolute variable, realize and to test out accurately and effectively anchor rod anchored rear axial bearing capacity and axial deformation performance; By the testing table of this test anchor pole axial load and axial deformation, can realize the test to anchor rod anchored rear axial bearing capacity and axial deformation performance in laboratory, for the Design of bolt support under anchor rod supporting theory research and complex stress condition provides foundation, to the research of in-depth bolt support mechanism, improve bolt supporting reliability, guarantee that engineering safety is significant.
Accompanying drawing explanation
Fig. 1 is the cut-open view that the utility model embodiment tests the testing table of anchor pole axial load and axial deformation.
Wherein, 2: work test board; 5: anchor pole; 6: stretching device; 61: stretching back timber; 62: impact beam; 71: driving mechanism; 93: coal and rock physical model; 103: load sensor; 106: displacement transducer; 107: even twisting moment sensor.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but can not be used for limiting scope of the present utility model.
In description of the present utility model, except as otherwise noted, the implication of " a plurality of " is two or more; Term " on ", orientation or the position relationship of the indication such as D score, " left side ", " right side ", " interior ", " outward ", " front end ", " rear end ", " head ", " afterbody " be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific orientation, construct and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. are only for describing object, and can not be interpreted as indication or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
As shown in Figure 1, a kind of testing table of testing anchor pole axial load and axial deformation described in the present embodiment comprises the anchor pole 5 for mine support, this testing table also comprises work test board 2, stretching device 6, driving mechanism 71, load sensor 103 and displacement transducer 106, in work test board 2, be provided with the boring model for anchoring rod 5, and the aperture that anchor pole 5 is installed on boring model by nut lock is located, stretching device 6 comprises impact beam 62 and stretching back timber 61, impact beam 62 setting corresponding to stretching back timber 61, anchor pole 5 one end are anchored in boring model, the other end of anchor pole 5 is fixed on the end face of impact beam 62, stretching back timber 61 is under the drive of driving mechanism 71, along the axial thrusting action of anchor pole 5 in impact beam 62, so that anchor pole 5 bears axial tension load and axial tension distortion occurs, load sensor 103 is installed between impact beam 62 and stretching back timber 61, for testing the normal pressure between impact beam 62 and stretching back timber 61, be axial tension load, displacement transducer 106 is installed on respectively anchor pole 5 two ends, the displacement producing for testing anchor pole 5 ends.
Displacement transducer 106 can be tested surrouding rock deformation process, and the axial deformation that anchor pole 5 produces under the various loads such as stretching, shearing, impact, is not limited only to anchor pole 5 axial deformations that axial load causes.
In order to realize the robotization of this testing table, control, driving mechanism 71 is two oil cylinders, oil cylinder is arranged on work test board 2 by oil cylinder frame, and the piston rod of oil cylinder is fixedly connected with stretching back timber 61, for driving stretching back timber 61 along the axial thrusting action of anchor pole 5 in impact beam 62, impact beam 62 drives anchor poles 5 to produce axial tension load axial tension distortion also occurs.
In order to improve the work efficiency of oil cylinder, oil cylinder is symmetricly set in the both sides of anchor pole 5, the axially parallel of the piston rod of oil cylinder and anchor pole 5, the thrusting action of the piston rod utilizing drives stretching back timber 61 moving axially along anchor pole 5, in stretching back timber 61 and impact beam 62, be respectively equipped with the through hole for sheathed anchor pole 5, stretching back timber 61 is actively located on anchor pole 5, between the through hole of stretching back timber 61 and anchor pole 5 bodies of rod, there is space, stretching back timber 61 moves axially and acts in impact beam 62 along anchor pole 5, between stretching back timber 61 and impact beam 62, form normal pressure, anchor pole 5 wears and is fixed in impact beam 62, normal pressure is transformed to the drawing stress that outer anchor pole 5 bodies of rod bear.
Anchor pole 5 passes impact beam 62 and stretching back timber 61 and is anchored in boring model, and passes through nut, pallet, the spherical washer locking of aligning on impact beam 62 end faces.Anchor pole 5 is coal and rock physical model 93 bondings with boring model by Anchor Agent.Anchor pole 5 bodies of rod are when being subject to tensile load generation axial deformation, and anchor pole 5 two ends can produce displacement.
Coal and rock physical model 93 is preferably real coal or rock, and coal and rock physical model 93 also can be the boring model that the Other Engineering material similar to coal, rock made; Anchor Agent is by unsaturated polyester resin, hardening agent, promoter and other auxiliary material, formulated thick anchoring adhesives by a certain percentage, by mylar, cut apart packing and be cylindric powder stick, after having stirring, normal temperature cure is fast, bonding strength is high, reliable and the endurance of anchor force the premium properties such as well, guarantees the authenticity of test data.
In addition, displacement transducer 106 is installed on the two ends of anchor pole 5 by outside support.
Preferably, the quantity of displacement transducer 106 is two, and one of them displacement transducer 106 is positioned at the boring model exposed junction of anchor pole 5, and is connected with anchor pole 5 end face centers; Another displacement transducer 106 is positioned at the bottom, boring model hole of anchor pole 5, and is connected with anchor pole 5 end face centers through the center pit of even twisting moment sensor 107.
By the testing table of this test anchor pole axial load and axial deformation, can realize the test to anchor rod anchored rear axial bearing capacity and axial deformation performance in laboratory, for the Design of bolt support under anchor rod supporting theory research and complex stress condition provides foundation, to the research of in-depth bolt support mechanism, improve bolt supporting reliability, guarantee that engineering safety is significant.
The utility model also provides the method for testing of the testing table of test anchor pole axial load described in a kind of basis and axial deformation, comprises the steps:
S1, anchor pole one end to be measured is anchored in the boring model of work test board; On the boring model exposed junction of anchor pole, mounting nuts, pallet, aligning spherical washer fastening nut, lock onto on the end face of impact beam.
S2, by driving mechanism, drive stretching back timber thrusting action in impact beam, make anchor pole bear axial tension load, and produce axial tension distortion;
S3, by load sensor, test the normal pressure between stretching back timber and impact beam, normal pressure is identical with axial tension magnitude of load;
S4, by displacement transducer, test respectively the displacement at anchor pole two ends, and by the summation of measured displacement amount algebraically, show that bolt shaft is to absolute variable.
Wherein, in step S2, utilize hydraulic system pressure sensor, the pressure of test oil cylinder liquid-supplying system, and control by control system the pressure that guide proportion reduction valve moves to change liquid-supplying system, thus regulate the thrust of cylinder piston rod; Utilize throttle valve control flow rate of hydraulic system, to change the speed of stretching out of cylinder piston rod, and then control bolt shaft to loading velocity.
Wherein, in step S4, displacement transducer utilizes outside support to be independently arranged on anchor pole two ends, and one of them displacement transducer is positioned at the boring model exposed junction of anchor pole, and directly usings center, anchor pole end as measuring point; Another displacement transducer is positioned at the boring model bottom of anchor pole, and inserts in boring model through the center pit of even twisting moment sensor, and take anchored end anchor pole end face center is measuring point.
This testing table is for actual conditions under simulation well, the broken pure axial tension load that acts on anchor pole when swollen of (tray fastening nut) and bolt supporting course of work country rock during test rockbolt installation pretension; The two ends distortion of test anchor pole, the axial tension that algebraically summation obtains is deformed into the absolute deformation of anchor rod body, has eliminated anchored end slippage and the impact of boring model deformation on test result; The simulation anchor pole course of work, the axial tension load of utilizing stretching oil cylinder to apply, not only can utilize the load sensor test of installing in this programme, also can obtain as calculated by test oil cylinder liquid-supplying system pressure, the flexible resistance of oil cylinder, oil cylinder piston area etc.; The Loading Control of this testing table and Test Data Collecting and processing, all adopt computer programing.
The testing table of the utility model test anchor pole axial load and axial deformation makes can simulate rockbolt installation pretension silver in laboratory and course of work axially loaded changes and distortion, and can test out accurately and effectively anchor rod anchored rear axial bearing capacity and axial deformation performance; By load sensor being installed between impact beam and stretching back timber, for testing the normal pressure between impact beam and stretching back timber.Displacement transducer is installed on the two ends of anchor pole, the displacement producing for testing anchor pole end, by two displacement algebraically read group total draw bolt shaft to absolute variable, realize and to test out accurately and effectively anchor rod anchored rear axial bearing capacity and axial deformation performance; By the testing table of this test anchor pole axial load and axial deformation, can realize the test to anchor pole axial load and axial deformation performance in laboratory, for the Design of bolt support under anchor rod supporting theory research and complex stress condition provides foundation, to the research of in-depth bolt support mechanism, improve bolt supporting reliability, guarantee that engineering safety is significant.
Embodiment of the present utility model provides for example with for the purpose of describing, and is not exhaustively or by the utility model to be limited to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present utility model and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the utility model design is suitable for special-purpose.
Claims (7)
1. a testing table of testing anchor pole axial load and axial deformation, comprise the anchor pole (5) for mine support, it is characterized in that, also comprise work test board (2), stretching device (6), driving mechanism (71), load sensor (103) and displacement transducer (106), in described work test board (2), be provided with the boring model for anchoring rod (5), described stretching device (6) comprises impact beam (62) and stretching back timber (61), described anchor pole (5) one end is anchored in boring model, and the other end is fixed on the end face of described impact beam (62); Described stretching back timber (61) thrusting action under the drive of driving mechanism (71), in impact beam (62), is out of shape so that described anchor pole (5) bears axial tension load and axial tension occurs; Described load sensor (103) is positioned between impact beam (62) and stretching back timber (61), be used for testing described axial tension load, described displacement transducer (106) is installed on respectively the two ends of anchor pole (5), for testing described axial deflection.
2. the testing table of test anchor pole axial load according to claim 1 and axial deformation, it is characterized in that, described driving mechanism (71) is two oil cylinders, described oil cylinder is arranged on work test board (2) by oil cylinder frame, and the piston rod of described oil cylinder is fixedly connected with stretching back timber (61), be used for driving described stretching back timber (61) along the axial thrusting action of anchor pole (5) in described impact beam (62), described impact beam (62) drives described anchor pole (5) to produce axial tension load and axial tension distortion occurs.
3. the testing table of test anchor pole axial load according to claim 2 and axial deformation, is characterized in that, described oil cylinder is symmetricly set in the both sides of boring model, and the piston rod of described oil cylinder is parallel with the axis of boring model.
4. the testing table of test anchor pole axial load according to claim 3 and axial deformation, it is characterized in that, described anchor pole (5) passes impact beam (62) and stretching back timber (61) and is anchored in boring model, and the boring model exposed junction of anchor pole passes through nut, pallet, the spherical washer locking of aligning on the end face of impact beam (62).
5. the testing table of test anchor pole axial load according to claim 4 and axial deformation, is characterized in that, described anchor pole (5) is by Anchor Agent and coal and rock physical model (93) bonding that forms boring model.
6. the testing table of test anchor pole axial load according to claim 5 and axial deformation, is characterized in that, described displacement transducer (106) is installed on the two ends of anchor pole (5) by outside support.
7. the testing table of test anchor pole axial load according to claim 6 and axial deformation, it is characterized in that, the quantity of described displacement transducer (106) is two, displacement transducer described in one of them (106) is positioned at the boring model exposed junction of anchor pole (5), and is connected with anchor pole (5) end face center; Displacement transducer described in another (106) is positioned at the bottom, boring model hole of anchor pole (5), and is connected with anchor pole (5) end face center through the center pit of even twisting moment sensor (107).
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| CN201420358378.4U CN204008301U (en) | 2014-06-30 | 2014-06-30 | A kind of testing table of testing anchor pole axial load and axial deformation |
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| CN201420358378.4U CN204008301U (en) | 2014-06-30 | 2014-06-30 | A kind of testing table of testing anchor pole axial load and axial deformation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104089819A (en) * | 2014-06-30 | 2014-10-08 | 天地科技股份有限公司 | Test bed for testing axial load and axial deformation of anchor rod and test method for test bed |
| CN105221172A (en) * | 2015-09-21 | 2016-01-06 | 中国矿业大学 | A kind of end-fixed bolter free segment real-time axle power nondestructive testing calibration system and method |
| CN109211674A (en) * | 2018-09-05 | 2019-01-15 | 上海华龙测试仪器有限公司 | A kind of anchorage tooling of microcomputer controlled electro-hydraulic servo static load anchoring test machine |
| CN110261234A (en) * | 2019-07-05 | 2019-09-20 | 山东科技大学 | Crack rock absciss layer support with bolting simulation test device and method |
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2014
- 2014-06-30 CN CN201420358378.4U patent/CN204008301U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089819A (en) * | 2014-06-30 | 2014-10-08 | 天地科技股份有限公司 | Test bed for testing axial load and axial deformation of anchor rod and test method for test bed |
| CN104089819B (en) * | 2014-06-30 | 2016-09-14 | 天地科技股份有限公司 | A kind of testing stand testing anchor pole axial load and axial deformation and method of testing |
| CN105221172A (en) * | 2015-09-21 | 2016-01-06 | 中国矿业大学 | A kind of end-fixed bolter free segment real-time axle power nondestructive testing calibration system and method |
| CN105221172B (en) * | 2015-09-21 | 2017-11-17 | 中国矿业大学 | A kind of real-time axle power Non-Destructive Testing calibration system of end-fixed bolter free segment and method |
| CN109211674A (en) * | 2018-09-05 | 2019-01-15 | 上海华龙测试仪器有限公司 | A kind of anchorage tooling of microcomputer controlled electro-hydraulic servo static load anchoring test machine |
| CN109211674B (en) * | 2018-09-05 | 2020-12-29 | 上海华龙测试仪器有限公司 | Anchor tool of microcomputer-controlled electro-hydraulic servo static load anchoring testing machine |
| CN110261234A (en) * | 2019-07-05 | 2019-09-20 | 山东科技大学 | Crack rock absciss layer support with bolting simulation test device and method |
| CN110261234B (en) * | 2019-07-05 | 2022-03-29 | 山东科技大学 | Fractured rock mass separation layer anchoring control simulation test device and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20150630 |
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