CN109253926A - Simulate the pull-out test device and method of roadway surrounding rock full length fastening quality testing - Google Patents
Simulate the pull-out test device and method of roadway surrounding rock full length fastening quality testing Download PDFInfo
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- CN109253926A CN109253926A CN201811220170.5A CN201811220170A CN109253926A CN 109253926 A CN109253926 A CN 109253926A CN 201811220170 A CN201811220170 A CN 201811220170A CN 109253926 A CN109253926 A CN 109253926A
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- 238000012360 testing method Methods 0.000 claims abstract description 82
- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 14
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/364—Embedding or analogous mounting of samples using resins, epoxy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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Abstract
本发明提供一种模拟巷道围岩全长锚固质量检测的拉拔试验装置及方法，属于采矿工程的技术领域，拉拔试验装置包括模拟试验箱、拉拔系统、用于监测锚杆拉拔过程中拉拔力的压力传感器、用于监测锚杆拉拔过程中位移的位移传感器以及通过数据传输导线分别与压力传感器和位移传感器连接的计算机系统；模拟试验箱包括箱体、设置在箱体内壁上的由电液控制的液压油缸、设置在液压油缸活动端头上的围压板以及伸缩弹簧管；拉拔系统包括由电液控制的空心千斤顶、与空心千斤顶配套的锚杆锚具以及设置有中心孔的承压板和垫盘。该装置可以较真实地实现锚固体原位应力场的模拟和锚杆安装过程中的预紧力施加，尽可能地还原现场。
The invention provides a pull-out test device and method for simulating full-length anchorage quality detection of surrounding rock of a roadway, belonging to the technical field of mining engineering. A pressure sensor for the middle pulling force, a displacement sensor for monitoring the displacement during the bolt pulling process, and a computer system respectively connected with the pressure sensor and the displacement sensor through a data transmission wire; the simulation test box includes a box body, which is arranged on the inner wall of the box The hydraulic cylinder controlled by electro-hydraulic, the confining plate arranged on the movable end of the hydraulic cylinder and the telescopic spring tube; the drawing system includes the hollow jack controlled by electro-hydraulic, the anchor rod and anchoring device matched with the hollow jack, and the Bearing plate and backing plate for center hole. The device can realistically realize the simulation of the in-situ stress field of the anchor and the application of the pre-tightening force during the installation of the bolt, and restore the scene as much as possible.
Description
Technical field
The present invention relates to the technical fields of mining engineering, examine more particularly to a kind of simulation roadway surrounding rock full length fastening quality
The pull-out test device and method of survey.
Background technique
In underground mining activity, channel of the tunnel as transport, ventilation and pedestrian realizes that the control of its surrounding rock stability is
Ensure the key of mine safety efficient green exploitation.Anchor pole, since its cost economy, easy to operate, control effect are good etc. all
More advantages have been widely used for the Surrounding Rock Control of coal mine roadway.
As underground mining activity constantly extends to deep, shadow of the roadway surrounding rock due to high-ground stress and strong mining induced stress
It rings, shows the feature that rock deformation is big, destruction damage is serious, correspondingly also the stress of anchor pole will necessarily be brought to become
Change, if roadway bolting support quality is bad, would potentially result in anchor rod anchored structure damage inactivation, cause tunnel accident, give
Mine or even entire society bring huge loss.
Deep laneway surrounding rock suspension roof support usually uses full length fastening, and this not only increases anchor systems to surrouding rock deformation
Sensibility, come into force in time conducive to anchor pole, while also enhancing the integral strength of anchoring body, be conducive to roadway surrounding rock control.So
The rational design and effect assessment for how realizing deep tunnel full length fastening supporting generally use anchor rod drawing test at present and come
Anchoring quality detection is carried out, and provides theoretical foundation and guidance for the rational design of suspension roof support.Common anchor rod drawing test
Mainly there are live pull-out test in situ and two kinds of laboratory model pull-out test.Live original position pull-out test data result is accurate,
But labour cost is high, repeatability is poor, and cannot reflect the force-transmission mechanism during anchor rod drawing and failure characteristics completely；Phase
Comparatively, the advantage of laboratory model pull-out test is apparent.
For laboratory model pull-out test, to similar to scene as much as possible, need to consider following two points: first is that wanting
Consider pretightning force applied in rockbolt installation process；Second is that consider the stress state of anchoring body constraint confining pressure.In publication number
" a kind of experiment simulator and its method for carrying out anchor rod drawing power test ", publication number disclosed in CN103323336A
" a kind of laboratory anchor rod drawing test pulling capacity-displacement detector " and publication number disclosed in CN205449674U
In " a kind of anchor rod drawing experimental rig " disclosed in CN207248634U, bolt pretension peace treaty in anchor structure is not considered
The application of beam surrouding rock stress, this is not inconsistent the simplification of laboratory model actually with scene, leads to power transmission during anchor rod drawing
There is deviation in mechanism and failure characteristics result, influence the rational design and effect assessment of suspension roof support.
Based on the above deficiency, need to design it is a kind of more can the installation of real simulation deep laneway surrounding rock Bolt and anchor
The laboratory model pull-out test device of solid occurrence condition can preferably reflect the force-transmission mechanism during anchor rod drawing and mistake
Feature is imitated, is the rational design and effect assessment based theoretical of suspension roof support.
Summary of the invention
Existing apparatus there are aiming at the problem that, the present invention provide it is a kind of simulate the quality testing of roadway surrounding rock full length fastening drawing
Experimental rig and method are pulled out, is not only able to realize influence research of each Parameters variation to anchoring property in anchoring body, but also
The influence of country rock rockbolt installation and anchoring body occurrence condition to anchoring property can be more really simulated, to be full length fastening branch
The rational design of shield and effect assessment provide more accurately guidance.
To achieve the above object, the present invention provides a kind of pull-out test dress for simulating the quality testing of roadway surrounding rock full length fastening
Set, including simulation test case, draw systems, for monitoring the pressure sensor of pulling capacity during anchor rod drawing, for monitoring
The displacement sensor that is displaced during anchor rod drawing and by data transmission wires respectively with pressure sensor and displacement sensing
The computer system of device connection；Simulation test case include cabinet, be arranged on cabinet wall by electrichydraulic control hydraulic cylinder,
Confining pressure plate and adjustable spring pipe on hydraulic cylinder movable end are set；The bottom plate of cabinet is provided with a cube rock test block and puts
Set；The quantity of hydraulic cylinder is four, is corresponded with four sides of cube rock test block, and surround cube rock test block
Position is placed to be evenly arranged；Confining pressure plate applies confining pressure to cube rock test block under the promotion of hydraulic cylinder；The number of adjustable spring pipe
It is multiple for measuring, and places a position around cube rock test block and is evenly arranged, including pedestal, bottom end and the bottom being slidably matched with box baseplate
The outer tube of seat connection, the threaded rod being arranged in outer tube and spring and the spring backing plate being set on threaded rod；Threaded rod
Bottom end is fixed on the base, and top is located at outside outer tube, is provided with fastening nut on the body of rod outside spring backing plate and for examining
Survey the pressure gauge of spring force；Spring is located at outside threaded rod, and both ends are connect with pedestal and spring backing plate respectively；Draw systems include
By the hollow jack of electrichydraulic control, anchor rod matched with hollow jack and the bearing plate and pad that are provided with centre bore
Disk；Bearing plate is installed on the top surface of cube rock test block by fastening nut；Disc is between hollow jack and bearing plate；
The axis of the centre bore of bearing plate and disc, the centre bore of cube rock test block and hollow jack is overlapped.
Further, the pull-out test device of above-mentioned simulation roadway surrounding rock full length fastening quality testing, further includes being pasted onto
It is used to monitor the foil gauge of the stress variation during anchor rod drawing on anchor pole；Foil gauge and computer system are transmitted by data
Conducting wire connection.
Further, it is provided on the bottom plate of cabinet and encloses the compression spring stand that cube rock test block places position；
Compression spring stand includes deck plate and compressed spring；Deck plate side rotation connection on the bottom plate of cabinet；Compression
The both ends of spring are connect with the bottom plate of cabinet and deck plate respectively.
Further, the quantity of adjustable spring pipe is four, is corresponded with four sides of cube rock test block.
Further, two opposite in four hydraulic cylinders are controlled for one group by the same control valve, two control valves
By fuel feed pump I and fuel feed pump II respectively to two groups of hydraulic cylinder fuel feeding.
Further, pressure sensor is mounted between hollow jack and anchor rod, and surface installation is parallel to hold
The mark post of pressing plate；Displacement sensor is draw-wire displacement sensor, is mounted on bearing plate, and drawstring is connected on mark post.
Further, mark post is the mark post with magnetic bases, is adsorbed on pressure sensor.
Further, cube rock test block, which is placed, is provided with drainage hole and/or described cube of rock test block placement position in position
Be provided centrally with centring hole.
Further, high-strength bolt is provided with outside cabinet.
The present invention also provides a kind of pull-out test methods for simulating the quality testing of roadway surrounding rock full length fastening, including following steps
It is rapid:
A cube rock test block that is prefabricated in advance and having conserved is put into intracorporal cube of rock test block of case and placed at position by S1, starting
The electrichydraulic control of hydraulic cylinder switchs, and according to simplified anchoring body preservation stress state, confining pressure plate is under the promotion of hydraulic cylinder
A confining pressure is applied to cube rock test block, applying mode is controlled with rate of stressing, loading speed 0.01MPa/s-0.1MPa/s it
Between, then stop until reaching preset confining pressure state, and keep pressure stabilizing state；
Adjustable spring pipe is slid into a cube rock test block edge by S2, bolt pretension setting, and bearing plate is pacified by fastening nut
The setting that the spring in fastening nut compression adjustable spring pipe carries out pretightning force is tightened in top surface loaded on cube rock test block, when
Pretightning force stops when reaching preset value；
S3 rapidly and uniformly falls prepared mining rapid resin Anchor Agent and mining slow resin anchoring agent by dosage requirement
In the centre bore for entering cube rock test block, by anchor pole insertion centre bore center, disc, hollow jack, pressure is successively installed and passed
Sensor and anchor rod twist off fastening nut, the counter-force of recoil of spring is applied to anchor pole after the solidification of mining rapid resin Anchor Agent
Add pretightning force, remove pressure gauge and adjustable spring pipe, then carries out laboratory maintenance；
S4 starts pull-out test after maintenance, the anchor rod drawing power and displacement data measured during test is passed by conducting wire
Transporting line is passed to computer system respectively, and draws corresponding analysis curve, until pull-out test terminates.
The beneficial effects of the present invention are:
First is that can more accurately realize that the simulation of anchoring body in-situ stress field and the pretightning force during rockbolt installation apply, to the greatest extent
Possibly reduction scene；
Two can be achieved on the system research of multifactor multivariable of anchoring body etc., provide more for roadway bolt design and effect assessment
Theoretical basis and guidance well；
Third is that test structure used is relatively easy, easy to use, integrated level is high, and controlling test and data acquiring and recording are all made of electricity
Sonization avoids human error, so that test data is more acurrate.
Detailed description of the invention
Fig. 1 is the pull-out test device for the simulation roadway surrounding rock full length fastening quality testing that the embodiment of the present invention 1 provides
Main view；
Fig. 2 is the top view of pull-out test device shown in Fig. 1；
Fig. 3 is the structural schematic diagram of adjustable spring pipe in pull-out test device shown in Fig. 1；
Fig. 4 is the structural schematic diagram of compression spring stand in pull-out test device shown in Fig. 1.
In figure: 1- pressure sensing；2- displacement sensor；3- cabinet；3.1- spill sliding slot；4- hydraulic cylinder；5- confining pressure plate；
6- adjustable spring pipe；6.1- pedestal；6.2- outer tube；6.3- threaded rod；6.4- spring；6.5- spring backing plate；7- fastening nut；8-
Pressure gauge；9- hollow jack；10- anchor rod；11- bearing plate；12- disc；13- data transmission wires I；14- data pass
Transporting line II；15- compression spring stand；15.1- deck plate；15.2- compressed spring；16- fuel feed pump I；17- fuel feed pump II；
18- mark post；19- drainage hole；20- centring hole；21- high-strength bolt；22- fuel feed pump III；101- anchor pole；102- cubes of rock examination
Block.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of pull-out test devices for simulating the quality testing of roadway surrounding rock full length fastening, including simulation test
Case, draw systems, for monitoring the pressure sensor 1 of pulling capacity in 101 drawing process of anchor pole, for monitoring 101 drawing of anchor pole
It the displacement sensor 2 that is displaced in the process and is connect respectively with pressure sensor 1 and displacement sensor 2 by data transmission wires
Computer system；Simulation test case include cabinet 3, be arranged on 3 inner wall of cabinet by electrichydraulic control hydraulic cylinder 4, set
Set confining pressure plate 5 and adjustable spring pipe 6 on 4 movable end of hydraulic cylinder；The bottom plate of cabinet 3 is provided with for placement cube
Cube rock test block of rock test block 102 places position, and cabinet 3 is other than being used to hold cube rock test block 102 or counter-force fills
It sets；The quantity of hydraulic cylinder 4 is four, is corresponded with four sides of cube rock test block 102, and around a cube rock examination
Block is placed position and is evenly arranged；Confining pressure plate 5 applies confining pressure to cube rock test block 102 under the promotion of hydraulic cylinder 4；Adjustable spring
The quantity of pipe 6 be it is multiple, place a position around cube rock test block and be evenly arranged, including the pedestal being slidably matched with 3 bottom plate of cabinet
6.1, it bottom end and pedestal 6.1 connect outer tube 6.2, the threaded rod 6.3 being arranged in outer tube 6.2 and spring 6.4 and is set in
Spring backing plate 6.5 on threaded rod 6.3；The bottom end of threaded rod 6.4 is fixed on pedestal 6.1, and top is located at outside outer tube 6.2, position
In being provided with fastening nut 7 on the body of rod outside spring backing plate 6.5 and for the pressure gauge 8 of 6.4 elastic force of detection spring；Spring 6.4
Outside threaded rod 6.3, both ends are connect with pedestal 6.1 and spring backing plate 6.5 respectively；Draw systems include the sky by electrichydraulic control
Heart jack 9, anchor rod 10 matched with hollow jack 9 and the bearing plate 11 and disc 12 that are provided with centre bore；It holds
Pressing plate 11 is installed on the top surface of cube rock test block 102 by fastening nut 7；Disc 12 is located at hollow jack 9 and bearing plate
Between 11；The axis of the centre bore of bearing plate 11 and disc 12, the centre bore of cube rock test block 102 and hollow jack 9
It is overlapped, when installing anchor pole 101, the central axis of anchor pole 101 is overlapped with axis.Wherein, the sliding setting of adjustable spring pipe 6 can be real
It is now freely mobile and fixed, it can reduce to the interference in 102 installation process of cube rock test block；Hollow jack 9 is used for anchor
The drawing of bar 101；Pressure sensor 1 and the corresponding data transmission wires of displacement sensor 2 be respectively data transmission wires I13 and
Data transmission wires II14.
Further, the pull-out test device of above-mentioned simulation roadway surrounding rock full length fastening quality testing, further includes being pasted onto
For monitoring the foil gauge of the variation of the stress in 101 drawing process of anchor pole on anchor pole 101；Foil gauge and computer system pass through number
It is connected according to transfer wire.Prevent damage when foil gauge dampness and drawing from failing with silicon rubber package outside foil gauge.
Further, the effect that cube rock test block places position is the shifting prevented in 102 pressure process of cube rock test block
Dynamic bias, can be the limiting groove being arranged on 1 bottom plate of cabinet, and limiting groove and cube rock test block 102 are adapted.At this
In embodiment, it is preferable that be provided on the bottom plate of cabinet 1 and enclose the compression spring stand that cube rock test block places position
15；Compression spring stand 15 includes deck plate 15.1 and compressed spring 15.2；Deck plate 15.1 side rotation connection
On the bottom plate of cabinet 1；The both ends of compressed spring 15.2 are connect with the bottom plate of cabinet 3 and deck plate 15.2 respectively.Compression spring
Deck 15 is compared with groove, be can be realized uniform all loads of 102 confining pressure of cube rock test block, has been effectively eliminated in groove
The case where could not previously be loaded into reduces effect of end surface.
Further, the quantity of adjustable spring pipe 6 is four, is corresponded with four sides of cube rock test block 102,
Influence of this position to load confining pressure is minimum.The through-hole passed through there are four being arranged on bearing plate 11 for threaded rod 6.3.
Further, pressure gauge 8 is digital display pressure gauge, convenient for accurately showing the application size of 6.5 elastic force of spring.For anchor
For pretightning force when bar 101 is installed, since the present apparatus is applied using four adjustable spring pipes 6, according to the equilibrium principle of power,
When required pretightning force isPWhen, the required power provided of each adjustable spring pipe 6 isP/4, i.e. digital display pressure gauge show value should beP/4。
The pedestal 6.1 and 3 bottom plate of cabinet of adjustable spring pipe 6 are realized there are many modes being slidably matched: as set on pedestal 6.1
It is equipped with pulley or sliding block, is provided with spill sliding slot 3.1 on 3 bottom plate of cabinet；For another example, concave card slot, cabinet are provided on pedestal 6.1
Fixture block is provided on 3 bottom plates.For the ease of processing and fabricating and installation, in the present embodiment, sliding block, 3 bottom of cabinet are set on pedestal 6.1
Spill sliding slot 3.1 is provided on plate.
Further, the spring 6.4 of adjustable spring pipe 6 is high strong spring, to guarantee that spring 6.4 has enough intensity.
Further, two opposite in four hydraulic cylinders 4 are controlled for one group by the same control valve, two control valves
By fuel feed pump I 16 and fuel feed pump II 17 respectively to two groups of 4 fuel feeding of hydraulic cylinder, to realize cube rock test block 102 two
The different power in confining pressure direction load.
Further, pressure sensor 1 is mounted between hollow jack 9 and anchor rod 10, and surface is equipped in parallel
In the mark post of bearing plate；Displacement sensor 2 is draw-wire displacement sensor, is mounted on bearing plate 11, drawstring is connected to mark post
On.
Further, mark post is the mark post 18 with magnetic bases, is adsorbed on pressure sensor 1, is easily installed.
Further, drainage hole 19 is provided in cube rock test block placement position and/or cube rock test block places position
It is provided centrally with centring hole 20, to solve the problems, such as the discharge of the water in 101 installation process of anchor pole and centering.
Further, high-strength bolt 21 is provided with outside cabinet 3, high-strength bolt 21 passes through two opposite boxboards of cabinet 3, with
Reinforce the integral strength of cabinet 3.
In the present embodiment, specifically, cabinet 3 is welded using high-strength thickening steel plate；Confining pressure plate 5 and bearing plate 11 are equal
For steel plate.
Further, hollow jack 9 is connect by fuel feed pump III22 with by the control valve in electrichydraulic control.
Embodiment 2
The present embodiment provides a kind of pull-out test methods for simulating the quality testing of roadway surrounding rock full length fastening, are based on 1 institute of embodiment
The pull-out test device for the simulation roadway surrounding rock full length fastening quality testing stated is implemented, and includes the following steps:
Cube rock test block 102 that is prefabricated in advance and having conserved is put into cube rock test block in cabinet 3 and placed at position by S1,
Start the electrichydraulic control switch of hydraulic cylinder 4, according to simplified anchoring body preservation stress state, confining pressure plate 5 is in hydraulic cylinder 4
Confining pressure is applied to cube rock test block 102 under promotion, applying mode is controlled with rate of stressing, and loading speed is in 0.01MPa/s-
Between 0.1MPa/s, then stop until reaching preset confining pressure state, and keep pressure stabilizing state；
S2,101 pretightning force of anchor pole setting, slides into 102 edge of cube rock test block for adjustable spring pipe 6, bearing plate 11 passes through
Fastening nut 7 is installed on the top surface of cube rock test block 102, tightens the spring 6.5 in the compression adjustable spring pipe 6 of fastening nut 7
The setting for carrying out pretightning force stops when pretightning force reaches preset value；
S3 rapidly and uniformly falls prepared mining rapid resin Anchor Agent and mining slow resin anchoring agent by dosage requirement
In the centre bore for entering cube rock test block 102, anchor pole 101 is inserted into centre bore center, disc 12, hollow jack are successively installed
9, pressure sensor 1 and anchor rod 10 twist off fastening nut 7, spring 6.5 returns after the solidification of mining rapid resin Anchor Agent
The counter-force of bullet applies pretightning force to anchor pole 101, removes pressure gauge 8 and adjustable spring pipe 6, then carries out laboratory maintenance；
S4 starts pull-out test after maintenance, the anchor rod drawing power and displacement data measured during test is passed by conducting wire
Transporting line is passed to computer system respectively, and draws corresponding analysis curve, until pull-out test terminates.
In the present embodiment, cube rock test block 102 used is tested, using the theory of similarity of mechanical properties of rock,
Use for laboratory cement, gypsum, fine sand and water determine final proportion after carrying out proportioning test, are finally carried out by the mold customized pre-
System；Test anchor pole 101 used is the twisted steel anchor rod for having rectangle shallow slot along axial direction, convenient for pasting foil gauge.
In step sl, comprehensively consider the loading speed of concrete crushing strength test and in order to reduce loading speed mistake
Fastly to the impact of cabinet 3, loading speed selects 0.01MPa/s-0.1MPa/s.
In step S2 and S3, fastening nut 7 is tightened or is twisted off by torque wrench.
In step s3, mining rapid resin Anchor Agent length accounts for the 1/4-1/3 or so of drilling overall length, remaining length is mine
With slow resin anchoring agent, and then realize the full length fastening of anchor pole.
In conclusion pull-out test device and the side of simulation roadway surrounding rock full length fastening quality testing provided by the invention
Method can more actually realize the research to deep full length fastening roadway bolt drawing stress characteristic and damage inactivation mechanism, and
And more accurate, full and accurate test data can be provided, it is the full length fastening design of its support and anchoring matter in actual production medium and deep tunnel
Amount detection provides theoretical foundation and scientific guidance.
The above is only the embodiment of the present invention, are not intended to limit the scope of the invention, all to be said using the present invention
Equivalent structure or equivalent flow shift made by bright book content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (10)
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| CN110186760A (en) * | 2019-06-13 | 2019-08-30 | 河北建筑工程学院 | A kind of soil property anchor rod drawing test method for considering to change confining pressure condition |
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| CN113931690A (en) * | 2021-03-11 | 2022-01-14 | 中国人民解放军火箭军工程大学 | Tunnel stock anchor effect detection device |
| CN113172104A (en) * | 2021-05-07 | 2021-07-27 | 江苏艾可森钢绳有限公司 | Steel wire drawing experimental equipment with recording function |
| WO2024244122A1 (en) * | 2023-05-31 | 2024-12-05 | 山东科技大学 | In-situ testing apparatus and testing method for rockbolt support response characteristics under dynamic and static loading |
| CN116499885A (en) * | 2023-06-28 | 2023-07-28 | 矿冶科技集团有限公司 | Anchor rod drawing performance testing device and method |
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