CN107576566B - A kind of mine support material mechanical performance integrated test facility - Google Patents
A kind of mine support material mechanical performance integrated test facility Download PDFInfo
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- CN107576566B CN107576566B CN201710662318.XA CN201710662318A CN107576566B CN 107576566 B CN107576566 B CN 107576566B CN 201710662318 A CN201710662318 A CN 201710662318A CN 107576566 B CN107576566 B CN 107576566B
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Abstract
The present invention relates to mine support material mechanical performance integrated test facilities, current test method can effectively be solved can not be to anchor pole shear behavior integration test, make it while realizing that stretching, shearing and anchoring body to anchor pole draw the compressive property of the test, U-shaped steel bracket of cutting performance to test, and the problem of mine support component compression verification, its solve technical solution be, comprising the following steps: 1) anchor shaft anchor cable tension test；2) support unit mechanical test；3) anchor pole and anchoring body shearing test；4) compound tensile shear testing；5) performance detection data exports；The method of the present invention advantages of simple, effect is good, measures power by high-precision load sensor, and purposes is wide, and simple to operation, is the big innovation on mine support material mechanical performance integrated test facility.
Description
Technical field
The present invention relates to mine support field, especially a kind of mine support material mechanical performance integrated test facility.
Background technique
As mining condition is increasingly sophisticated, tunnel generallys use a variety of combined supporting shapes based on bolting with wire mesh
Formula, but effect is general.To find out its cause, after (1) mine enters deep mining, mechanics shape suffered by mine roadway support material underground
State becomes to become increasingly complex.In bolting with wire mesh system, anchor pole (rope) not only tension/action of compressive stress, but also by shear stress
Effect, anchor pole (rope) deformation failure is largely because by shear action as a result, and domestic detection device does not have drawing
Cut the anti-shear performance under Mechanics Performance Testing, especially anchoring status；(2) the bolting with wire mesh component of a system and shed ding support system
There are major defects for the Proper Match of component, indefinite to the mechanical property of component of a system interaction；(3) deep tunnel by
Heavily stressed effect is necessarily required to high-intensitive support material, at present the domestic test device and phase for lacking relevant large-tonnage
The test method answered.Therefore, it is imperative to develop a kind of mine support material mechanical performance integrated test facility.
Summary of the invention
For above situation, for the defect for solving the prior art, the purpose of the present invention is just to provide a kind of mine support material
Expect mechanical property integrated test facility, can effectively solve current test method can not make it to anchor pole shear behavior integration test
Realize that stretching, shearing and anchoring body to anchor pole (rope) draw the compressive property of the test, U-shaped steel bracket of cutting performance to test simultaneously,
And the problem of mine support component compression verification.
The technical solution that the present invention solves is, comprising the following steps: 1) anchor shaft anchor cable tension test；2) support unit power
Learn test；3) anchor pole (rope) and anchoring body shearing test；4) compound tensile shear testing；5) performance detection data exports.
The method of the present invention advantages of simple, effect is good, measures power by high-precision load sensor, and purposes is wide, and letter
It is single easy to operate, it is the big innovation on mine support material mechanical performance integrated test facility.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the front view of Fig. 1 of the present invention.
Fig. 3 is the side view of Fig. 1 of the present invention.
Fig. 4 is the top view of Fig. 1 of the present invention.
Fig. 5 is lateral shear device (anchor pole (rope) and anchoring body shear test device) perspective view of the invention.
Fig. 6 is vertical loading device of the invention (detection of anchor pole tension and support unit mechanical testing equipment) perspective view.
Fig. 7 is control device perspective view of the invention.
Specific embodiment
Below in conjunction with attached drawing, specific embodiments of the present invention will be described in further detail.
It is provided by Fig. 1-7, the present invention utilizes mine support material mechanical performance comprehensive test device, then carries out following examination
Test step:
1) anchor shaft anchor cable tension test: when carrying out the integration test of mine support material mechanical performance, first by entire mine
Support material mechanical property comprehensive test device is fixed on above the ground crossed by cement treated, when test 11 pull resistance of anchor pole
When energy, vertical servo actuator 1 is bolted on to the top of upper beam 2, and give vertical servo actuation by column 4
Device 1 and upper beam 2 provide holding power, and stretch sensor 3 is linked with collet 6 by collet leading truck 5, and collet 6 is vertical
Under the collective effect of servo actuator 1 and stretch sensor 3, the movement in vertical direction may be implemented, anchor pole 11 utilizes collet 6
Its position is fixed with tensioning auxiliary appliance 7, the detection of 11 tension of anchor pole, vertical deviation measurement range 500mm may be implemented；
2) support unit mechanical test: being that three sections of U-shaped steels 10 are passed through two U-shaped steels when testing support unit performance
The connection of clip 9 or four sections of U-shaped steels 10 are connected by three U-shaped steel clips 9, and backup plate 12, limited block 13 and block 14 fix its position
It sets, collet 6 attaches 8 by compression and upwards pressure to U-shaped steel offer Vertical Square, so that it may realize support unit mechanical test,
It can detecte the quality of connection between U-shaped steel 10 and U-shaped steel clip 9, while measuring the performance of U-shaped steel 10 and U-shaped steel clip 9,
In addition, anchoring tray to be placed on to the end for moving horizontally guide rail 20, i.e., in the lower section of collet 6, it is corresponding anchoring tray can be measured
Anti-compression properties；
3) anchor pole (rope) and anchoring body shearing test: when testing anchor pole (rope) and when anchoring body, anchoring body that will make
22, which attach 17 by shearing with anchor pole (rope) 16, is fixed it, effect of the shear sensors 18 in shearing servo-cylinder 19
Under, make it may be implemented to move horizontally on moving horizontally guide rail 20 by pulley 23, shearing attaches 17 upper section at this time
Be with section below it is fixed, middle section can under the action of shearing servo-cylinder 19, realize horizontal direction on movement,
After starting shearing servo-cylinder 19, to be provided in horizontal direction in the middle part of the test block that anchoring body 22 and anchor pole (rope) 16 form
Shearing force, realize the shearing test of anchor pole (rope) 16 and anchoring body 22, entire shearing test device passes through horizontal addload bracket
21 provide holding power, lateral displacement measurement range 100mm；
4) compound tensile shear testing: anchor pole (rope) is tested (under tension test and shearing test collective effect) under combined stress
And when anchoring body mechanical property, the anchor pole (rope) 16 in the test component of anchoring body 22 and the composition of anchor pole (rope) 16 is passed through into collet
6 and the fixed position of tensioning auxiliary appliance 7, pulling force of the anchor pole (rope) 16 by vertical servo actuator 1 application vertical direction, anchoring body 22
17 fixed positions are attached using shearing, anchoring body 22 applies the shearing force of horizontal direction by shearing servo-cylinder 19, thus real
(the drawing effect of cutting) anchor pole (rope) and anchoring body mechanics properties testing under existing combined stress；
5) performance detection data exports: control device will be used for the computer of data processing and provide the hydraulic oil source of power
26 combinations are on control cabinet 27, wherein host 25 and hydraulic oil source 26 are located at the inside of control cabinet 27, are controlled by computer
Pulling force, support unit mechanical test pressure applied, anchor pole (rope) and the anchoring body test that tension test is applied are applied
Shearing force, anchor pole (rope) and the pulling force that is applied of anchoring bluk recombination tensile shear testing and shearing force, simultaneous computer can be to inspection
The data measured are recorded and draw respective performances curve, to reach the performance detection of corresponding test test specimen.
The mine support material mechanical performance comprehensive test device include vertical loading device, lateral shear device and
Control device, vertical loading device include the rigid loading frame that pedestal 15, upper beam 2 and four columns 4 are constituted, pedestal 15 with it is upper
It is supported and is connected by four columns 4 between crossbeam 2, vertical servo actuator 1 is placed on upper beam 2, the work of vertical servo actuator 1
Stopper rod connects stretch sensor 3, and 3 connecting clip leading truck 5 of stretch sensor and collet 6, stretch sensor 3 are directly tested vertical
Test force is used for the stretching and support unit mechanical test of anchor pole (rope) component；Lateral shear device by horizontal addload bracket 21,
It moves horizontally guide rail 20, shearing servo-cylinder 19 and shearing and attaches 17 compositions, horizontal addload bracket 21 is equipped with to move horizontally and lead
Rail 20, shearing attaches 17, shear sensors 18 and shearing servo-cylinder 19 is sequentially connected and fits together, and moves horizontally guide rail 20
It is fixed on the top of horizontal addload bracket 21, pulley 23 can be slided on moving horizontally guide rail 20, stretch sensor 3,
Shear sensors 18 are connected through conducting wire with the host 25 of control device, the hydraulic oil source of vertical servo actuator 1 and control device
26 are connected.
In order to guarantee using effect, the vertical loading device (the i.e. detection of anchor pole tension and support unit mechanical test
Device) height be 4270mm, length 3200mm, width 1075mm, the model WAW- of vertical servo actuator 1
1500/1000J is capable of providing maximum stretching force 1000kN, maximum compression 1500kN；Stretch anchor rod component maximum spacing
1500mm, test speed range are 0.5-100mm/min；Collet leading truck 5 and collet 6 are located at the inside of four columns 4, to protect
Card collet 6 can be realized the movement in vertical direction, and the size of collet 6 is thickness 257mm, height 600mm, length 750mm；Two
The nearest position of a collet 6 distance under maximum tension range is 1200mm；Pedestal 15 is located at the lower part of four columns 4, ruler
Very little is height 320mm, thickness 300mm, length 3200mm, sets that there are two tensioning auxiliary appliances 7 on collet 6.
15 two sides of pedestal of the vertical loading device are equipped with block 14, and block 14 is having a size of height 170mm, length
210mm, width 170mm；Far from four columns 4 14 side of block on pedestal 15 be equipped with backup plate 12,12 height 1820mm of backup plate,
Length 3200mm；It is equipped with three sections of U-shaped steels 10 between block 14 and passes through three by two connections of U-shaped steel clip 9 or four sections of U-shaped steels 10
The arc body that a U-shaped steel clip 9 connects, arc body highest point are connected with compression and attach 8, and U-shaped steel 10, which is equipped with, is located at backup plate 12
Upper left position and upper right position limited block 13, and arranged by certain radian, having a size of diameter 85mm, length
170mm；U-shaped steel 10(support unit tested parts) maximum span be 2860mm, height 1500mm；Backup plate 12, limited block 13
Effect with block 14 is the position of fixed 10 support unit of U-shaped steel；Anchoring tray is placed on to the end for moving horizontally guide rail 20,
I.e. in the lower section of collet 6, the corresponding compressive property of pallet can be measured.
The lateral shear device (i.e. anchor pole (rope) and anchoring body shear test device), height 1100mm are long
Degree is 1800mm, width 860mm；Shearing servo-cylinder 19 can be provided maximum transversal shearing test power 1000kN, test speed
Degree is 0.5-100 mm/min；Shearing, which attaches, is fixed with shear sensors 18 in 17, shear sensors 18 and shearing servo-cylinder
19 are connected, and lateral shear device two sides are equipped with pulley 23, and there are two pulleys 23 for every side, and pulley 23, which is placed in, is fixed on horizontal addload branch
Moving horizontally in guide rail 20 on frame 21, can be realized and be horizontally moved on horizontal addload bracket；Anchoring body 22 and anchor pole
The tested parts that (rope) 16 forms are clipped to attach 17 fixations.
The control device high 1100mm, long 1500mm, wide 600mm, including host 25, hydraulic oil source 26 and control cabinet
27, exactly combine the computer for being used for data processing and the hydraulic oil source 26 that power is provided in control cabinet 27；Control cabinet 27
Inside be placed with host 25 and hydraulic oil source 26, host 25 is connected with display 24 through conducting wire with hydraulic oil source 26, passes through
Host 25, display 24, hydraulic oil source 26 come control the pulling force that tension test is applied, support unit mechanical test is applied
The shearing force that pressure and anchor pole (rope) and anchoring body are applied, while host 25, display 24 can be to the data detected
It is recorded and draws respective performances curve.
Working condition of the invention is: when carrying out the integration test of mine support material mechanical performance, first by whole device
It is fixed on above the ground for carrying out specially treated；Anchor pole tensile test device is to consolidate vertical servo actuator 1 by bolt
It is scheduled on the top of upper beam 2, and gives vertical servo actuator 1 and the offer holding power of upper beam 2 by column 4, stretches sensing
Device 3 is linked with collet 6 by collet leading truck 5, common work of the collet 6 in vertical servo actuator 1 and stretch sensor 3
Under, the movement in vertical direction may be implemented, when anchor pole 11 fixes its position using collet 6 and tensioning auxiliary appliance 7, may be implemented
The detection of 11 tension of anchor pole, vertical deviation measurement range 500mm；Support unit mechanical testing equipment is when three sections of U-shaped steels 10 pass through
Two connections of U-shaped steel clip 9 or four sections of U-shaped steels 10 are connected by three U-shaped steel clips 9, backup plate 12, limited block 13 and block 14
Its position is fixed, collet 6 attaches 8 by compression and upwards pressure to U-shaped steel offer Vertical Square, so that it may realize support unit power
Test is learned, can detecte the quality of connection between U-shaped steel 10 and U-shaped steel clip 9, while measuring U-shaped steel 10 and U-shaped steel clip 9
Performance, in addition anchoring tray is placed on to the end for moving horizontally guide rail 20, i.e., in the lower section of collet 6, pallet phase can be measured
The anti-compression properties answered；Anchor pole (rope) and anchoring body shear test device are logical by the anchoring body 22 made and anchor pole (rope) 16
It crosses shearing to attach 17 it is fixed, shear sensors 18 make it by pulley 23 under the action of shearing servo-cylinder 19
It may be implemented to move horizontally on moving horizontally guide rail 20, the upper section and section below that shearing attaches 17 at this time are fixed
, middle section can realize the movement in horizontal direction, starting shearing servo-cylinder under the action of shearing servo-cylinder 19
After 19, to provide the shearing force in horizontal direction in the middle part of the test block that anchoring body 22 and anchor pole (rope) 16 form, anchor is realized
The shearing test of bar (rope) 16 and anchoring body 22, entire shearing test device provides holding power by horizontal addload bracket 21, horizontal
To range of displacement measurement 100mm；Anchor pole (rope) and anchoring body (under tension test and shearing test collective effect) under combined stress
Device for detecting mechanical property is exactly that the anchor pole (rope) 16 in the test component formed to anchoring body 22 and anchor pole (rope) 16 passes through folder
First 6 and the fixed position of tensioning auxiliary appliance 7, pulling force of the anchor pole (rope) 16 by vertical servo actuator 1 application vertical direction, anchoring body
22 attach 17 fixed positions using shearing, and anchoring body 22 applies the shearing force of horizontal direction by shearing servo-cylinder 19, thus
Realize (the drawing effect of cutting) anchor pole (rope) and anchoring body mechanics properties testing under combined stress；Control system will be exactly used at data
The computer of reason and the hydraulic oil source 26 for providing power combine on control cabinet 27；Wherein, host 25 and hydraulic oil source 26 are located at
The inside of control cabinet 27 controls the pulling force, supporting that tension test is applied by the computer of host 25, the composition of display 24
The shearing force that element mechanics test pressure applied and anchor pole (rope) and anchoring body are applied, simultaneous computer can be to inspection
The data measured are recorded and draw respective performances curve, to reach the performance detection of corresponding test test specimen.
The numerical value for the test force that shear sensors 18 detect imported into computer by data line, can show all kinds of examinations
Data are tested, the curves such as test force-time, curve automatic data processing are drawn；Function is stored with complete file operation and data
Can, there is complete safety guard；When test force is more than every grade of maximum test force, overload protection, system unloaded；Work as work
When plug displacement reaches front and back extreme position, stroke protection, Oil pump electrical machinery is shut down.
The working principle of the invention is: the fixed support unit U of anchor pole (rope) 11, limited block 13 being added in tensioning auxiliary appliance 7
Fashioned iron is attached in shearing in 17 after addition anchoring body 22, by stretch sensor 3 or shear sensors 18 to tested parts institute
The power of receiving is handled and is recorded by computer, to carry out mine support material mechanical performance integration test, by multiple
Observational record and the data for analyzing dynamometer obtain corresponding roadway support material mechanical performance.
Structure of the invention is new reasonable, and effect is good, expand its measure working range, can carry out the detection of anchor pole tension,
(the drawing effect of cutting) anchor pole (rope) and anchoring under support unit mechanical test, anchor pole (rope) and anchoring body shear test, combined stress
The scientific research activities such as mechanics performance detection；Experimental rig is measured by numerical value of the high-precision load sensor to power, is utilized
Control device Control experiment process, the numerical value and trial curve of test force can be shown by importeding into computer, by the requirement of test
Test data is automatically processed, while can show test force-displacement, test force-time, test force-displacement (deformation) etc. and is a variety of
Trial curve, purposes is wide, and simple to operation, is a big innovation of mine support material mechanical performance comprehensive test device, tool
There is good economic and social benefit.
Claims (6)
1. a kind of mine support material mechanical performance integrated test facility, which is characterized in that utilize the mine support mechanics of materials
Energy comprehensive test device, then carries out following tests step:
1) anchor shaft anchor cable tension test: when carrying out the integration test of mine support material mechanical performance, first by entire mine support
Material mechanical performance comprehensive test device is fixed on above the ground crossed by cement treated, when test anchor pole (11) tensile property
When, vertical servo actuator (1) is bolted on to the top of upper beam (2), and give vertical servo by column (4)
Actuator (1) and upper beam (2) provide holding power, and stretch sensor (3) and collet (6) pass through collet leading truck (5) progress chain
It connects, collet (6) realizes the shifting in vertical direction under the collective effect of vertical servo actuator (1) and stretch sensor (3)
Dynamic, anchor pole (11) fixes its position using collet (6) and tensioning auxiliary appliance (7), realizes the detection of anchor pole (11) tension, and vertical deviation is surveyed
Measure range 500mm；
2) support unit mechanical test: being that three sections of U-shaped steels (10) are passed through two U-shaped steel cards when testing support unit performance
It binds round (9) connection or four sections of U-shaped steels (10) and passes through three U-shaped steel clip (9) connections, backup plate (12), limited block (13) and block
(14) its position is fixed, collet (6) attaches (8) by compression and upwards pressure to U-shaped steel offer Vertical Square, just realizes supporting structure
Part mechanical test detects the quality of connection between U-shaped steel (10) and U-shaped steel clip (9), while measuring U-shaped steel (10) and U-shaped steel
The performance of clip (9), in addition, anchoring tray to be placed on to the end for moving horizontally guide rail (20), i.e. the lower section in collet (6) is surveyed
Measure the corresponding anti-compression properties of anchoring tray；
3) anchor pole and anchoring body shearing test: when testing anchor pole and anchoring body, by the anchoring body made (22) and anchor pole
(16) it attaches (17) by shearing it is fixed, shear sensors (18) are led under the action of shearing servo-cylinder (19)
Cross pulley (23) and realize it on moving horizontally guide rail (20) and move horizontally, shearing at this time attach (17) upper section and under
Side be partially it is fixed, middle section is under the action of shear servo-cylinder (19), movement in realization horizontal direction, and starting cuts
After cutting servo-cylinder (19), to be provided in horizontal direction in the middle part of the test block of anchoring body (22) and anchor pole (16) composition
Shearing force, realizes the shearing test of anchor pole (16) and anchoring body (22), and entire shearing test device passes through horizontal addload bracket
(21) holding power, lateral displacement measurement range 100mm are provided；
4) compound tensile shear testing: when testing anchor pole and anchoring body mechanical property under combined stress, by anchoring body (22) and anchor pole
(16) anchor pole (16) in the test component formed is by collet (6) and the fixed position of tensioning auxiliary appliance (7), and anchor pole (16) is by hanging down
Apply the pulling force of vertical direction to servo actuator (1), anchoring body (22) attaches (17) fixed position, anchoring body using shearing
(22) apply the shearing force of horizontal direction by shearing servo-cylinder (19), to realize combined stress lower bolt and anchoring physical strength
Learn performance detection；
5) performance detection data exports: control device is by the computer for being used for data processing and provides the hydraulic oil source (26) of power
Combination is on control cabinet (27), wherein host (25) and hydraulic oil source (26) are located at the inside of control cabinet (27), pass through computer
It is applied to control pulling force, support unit mechanical test pressure applied, anchor pole and anchoring body test that tension test is applied
Pulling force and shearing force that the shearing force that adds, anchor pole and anchoring bluk recombination tensile shear testing are applied, simultaneous computer is to detecting
Data are recorded and draw respective performances curve, to reach the performance detection of corresponding test test specimen.
2. mine support material mechanical performance integrated test facility according to claim 1, which is characterized in that the mine
Mountain support material mechanical property comprehensive test device includes vertical loading device, lateral shear device and control device, it is vertical plus
It carries and sets the rigid loading frame including pedestal (15), upper beam (2) and four columns (4) composition, pedestal (15) and upper beam (2)
Between supported and connect by four columns (4), vertical servo actuator (1) is placed on upper beam (2), vertical servo actuator (1)
Piston rod connect stretch sensor (3), stretch sensor (3) connecting clip leading truck (5) and collet (6), lateral shear fill
Set by horizontal addload bracket (21), move horizontally guide rail (20), shearing servo-cylinder (19) and shearing attach (17) and constitute, level
Load bracket (21) is equipped with and moves horizontally guide rail (20), and shearing attaches (17), shear sensors (18) and shearing servo-cylinder
(19) it is sequentially connected and fits together, move horizontally the top that guide rail (20) is fixed on horizontal addload bracket (21), pulley (23)
It is slided on moving horizontally guide rail (20), the master of stretch sensor (3), shear sensors (18) through conducting wire and control device
Machine (25) is connected, and vertical servo actuator (1) is connected with the hydraulic oil source (26) of control device.
3. mine support material mechanical performance integrated test facility according to claim 2, which is characterized in that described hangs down
It is 4270mm, length 3200mm, width 1075mm, the model of vertical servo actuator (1) to the height of loading device
For WAW-1500/1000J, it is capable of providing maximum stretching force 1000kN, maximum compression 1500kN；Stretch maximum spacing
1500mm, test speed range are 0.5-100mm/min；Collet leading truck (5) and collet (6) are located at the interior of four columns (4)
Portion, to guarantee that collet (6) can be realized the movement in vertical direction, the size of collet (6) is thickness 257mm, height 600mm,
Length 750mm；The nearest position of two collets (6) distance under maximum tension range is 1200mm；Pedestal (15) is located at four
The lower part of root post (4) is set attached there are two stretching having a size of height 320mm, thickness 300mm, length 3200mm on collet (6)
Have (7).
4. mine support material mechanical performance integrated test facility according to claim 2, which is characterized in that described hangs down
Block (14) are equipped with to pedestal (15) two sides of loading device, block (14) is having a size of height 170mm, length 210mm, width
170mm；Block (14) side far from four columns (4) is equipped with backup plate (12) on pedestal (15), backup plate (12) height 1820mm,
Length 3200mm；It is equipped with three sections of U-shaped steels (10) between block (14) and passes through two U-shaped steel clip (9) connections or four sections of U-shaped steels
(10) arc body connected by three U-shaped steel clips (9), arc body highest point are connected with compression and attach (8), U-shaped steel (10)
It is equipped with the limited block (13) at the upper left position and upper right position positioned at backup plate (12), and is arranged by certain radian, ruler
Very little is diameter 85mm, length 170mm；The maximum span of U-shaped steel (10) is 2860mm, height 1500mm.
5. mine support material mechanical performance integrated test facility according to claim 2, which is characterized in that the cross
To shear, height 1100mm, length 1800mm, width 860mm；Shearing servo-cylinder (19) can be provided most
Big transverse shearing test power 1000kN, test speed are 0.5-100 mm/min；Shearing, which attaches, is fixed with shearing sensing in (17)
Device (18), shear sensors (18) are connected with shearing servo-cylinder (19), and lateral shear device two sides are equipped with pulley (23), every side
There are two pulley (23), pulley (23), which is placed in, is fixed on moving horizontally in guide rail (20) on horizontal addload bracket (21), anchoring
Clipped attach (17) of the tested parts of body (22) and anchor pole (16) composition are fixed.
6. mine support material mechanical performance integrated test facility according to claim 2, which is characterized in that the control
The high 1100mm of device, long 1500mm, wide 600mm processed, including host (25), hydraulic oil source (26) and control cabinet (27), control cabinet
(27) inside is placed with host (25) and hydraulic oil source (26), and host (25) and hydraulic oil source (26) are through conducting wire and display
(24) it is connected.
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| CN112304769A (en) * | 2020-10-15 | 2021-02-02 | 济南三越测试仪器有限公司 | Dynamic tension-shear testing machine |
| CN114323939B (en) * | 2021-12-20 | 2024-06-14 | 东北大学 | Comprehensive experimental device for static and dynamic tension and shear of anchor rod |
| CN115711809B (en) * | 2022-11-15 | 2023-08-18 | 山东科技大学 | System and method for testing anchoring performance of full-size rock mass anchor rod under composite load |
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