CN211873078U - Dynamic drawing testing device for side wall anchor rod of underground tunnel - Google Patents
Dynamic drawing testing device for side wall anchor rod of underground tunnel Download PDFInfo
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- CN211873078U CN211873078U CN202020157741.1U CN202020157741U CN211873078U CN 211873078 U CN211873078 U CN 211873078U CN 202020157741 U CN202020157741 U CN 202020157741U CN 211873078 U CN211873078 U CN 211873078U
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Abstract
The utility model discloses a testing arrangement is drawn to underworkings side group stock developments, the stock is worn to establish in the country rock in tunnel, the stock has overhanging end, overhanging end wear out extremely the outside of tunnel country rock, testing arrangement includes: the left side and the right side of the lower surface of the pressure-bearing beam are respectively provided with a support upright post, and the bottom of each support upright post is provided with a base; the energy impact unit comprises a lifting connection mechanism and an impact weight, wherein the lifting connection mechanism is used for lifting the impact weight to a set height and then releasing the impact weight to form impact energy; the energy conduction unit is respectively connected with the energy impact unit and the outward extending end of the anchor rod; and the data monitoring unit is used for monitoring the impact resistance data of the anchor rod. The utility model realizes the in-situ test of the impact resistance of the anchor rod and obtains real field data; and simultaneously, the utility model discloses can adapt to the multiple stock and arrange the condition, impact energy regulation and control is convenient, and the result is easy to be analyzed.
Description
Technical Field
The utility model relates to a mining engineering experimental study technical field especially relates to a testing arrangement is drawn to underworkings side group stock developments.
Background
Anchor rod reinforcement is the most common and important support means for deep mine anchoring at present. A large number of tests and field engineering show that the anchor rod reinforcement plays an effective protection role on the roadway, the mechanical property of surrounding rock and rock mass of the anchor rod support is obviously improved, the stress distribution of the rock mass is optimized, the bearing capacity of the surrounding rock of the roadway is enhanced, the deformation of the mine roadway is obviously reduced, and the safety of the mine is obviously improved. Rock burst is a common dynamic phenomenon in coal mine production, and often causes rapid deformation and damage of a roadway, casualties and even damage of a ground building. How to ensure that the instability and damage of the roadway cannot occur under the condition of large deformation when the rock burst phenomenon occurs is one of important directions of research of domestic and foreign experts and scholars. As the most important and effective support method of the underground roadway, the anchor rod is increasingly paid more attention and researched on the impact and damage state of the rock burst and the impact load resistance of the anchor rod.
At present, most of the detection of the impact load influence of the anchor rod is a test for directly impacting the anchor rod body, or a laboratory method is utilized to carry out a simulation test on the site to test the limit impact load of the anchor rod body. Taking the utility model 201210093451.5 as an example, the utility model mainly aims at the anchor rod and the tray to carry out direct impact test, and under the condition of mine roadway site, not only the body of the anchor rod itself is destroyed, but also the anchoring state of the anchor rod and the rock mass is determined; taking the utility model 201110387388.1 as an example, considering the impact and other influences on the anchor rod caused by the combined action of dynamic and static loads, the combined action only acts on the body of the anchor rod, and still does not consider the interaction between the anchor rod and the rock body; use utility model patent 201520987499.X as an example, this patent is considered stock and is strutted rock mass and receive the influence degree under the impact, nevertheless because be small-size analog simulation test, have certain gap with on-the-spot actual conditions, and the experimentation does not contain the data acquisition link, can't carry out quantitative analysis to the impact effect, can only observe the anchor body by the post-impact state.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the technical problem who exists among the prior art to a tunnel side group stock developments in pit that the flexibility is good, adapt to multiple stock arrangement condition, impact energy regulation and control is convenient, the result is easy to be analyzed are provided and are drawn testing arrangement.
The above technical problem of the present invention can be solved by the following technical solutions:
the utility model provides a pair of testing arrangement is drawn to underworkings side group stock developments, the stock is worn to establish in the country rock in tunnel, the stock has overhanging end, overhanging end wear out extremely the outside of tunnel country rock, testing arrangement includes:
the left side and the right side of the lower surface of the pressure-bearing beam are respectively provided with a support upright post, and the bottom of each support upright post is provided with a base;
the energy impact unit comprises a lifting connection mechanism and an impact weight, one end of the lifting connection mechanism is connected with the center of the lower surface of the pressure-bearing beam, the other end of the lifting connection mechanism is connected with the impact weight, and the lifting connection mechanism is used for lifting the impact weight to a set height and then releasing the impact weight to form impact energy;
the energy conduction unit is respectively connected with the energy impact unit and the overhanging end of the anchor rod and is used for conducting impact energy generated by the energy impact unit to the overhanging end of the anchor rod so as to enable the overhanging end of the anchor rod to be impacted in the axial direction;
and the data monitoring unit is used for monitoring the impact resistance data of the anchor rod.
Further, promote coupling mechanism and include manual hoist, self-discharging lifting hook and first wire rope, the upper portion of manual hoist with the lower surface central point of pressure-bearing crossbeam puts and is connected, the lower part of manual hoist with the self-discharging lifting hook is connected, the self-discharging lifting hook with but the self-discharging formula of first wire rope's one end is connected, first wire rope's the other end with the impact heavy object is connected.
Further, the impact weight comprises a supporting plate, a middle straight rod and a plurality of weight plates, lifting lugs are arranged on two sides of the supporting plate, the middle straight rod is vertically arranged at the center of the upper surface of the supporting plate, the weight plates are sequentially stacked and then penetrate through the middle straight rod, the top of the middle straight rod is higher than the weight plate on the uppermost layer, and the top of the middle straight rod is connected with the other end of the first steel wire rope.
Further, the energy conducting unit comprises:
the sliding block is connected to the supporting upright in a sliding mode and can be locked on the supporting upright through screws;
the pulley lever is horizontally arranged and close to one side of the anchor rod, and the left side and the right side of the pulley lever are respectively connected with the sliding block;
the special-shaped fixed pulley is rotatably arranged in the middle of the pulley lever; first to third protruding ends are arranged on the outer circumferential surface of the special-shaped fixed pulley at intervals;
one end of the second steel wire rope is fixedly connected with the first protruding end, and the other end of the second steel wire rope is connected with the extending end of the anchor rod through the data monitoring and processing unit; and the axis of the second steel wire rope is collinear with the axis of the anchor rod;
one end of the third steel wire rope is fixedly connected with the second protruding end, and the other end of the third steel wire rope is connected with an adjusting heavy object;
and one end of the fourth steel wire rope is connected with the cantilevers on the two sides of the third protruding end, and the other end of the fourth steel wire rope is connected with the lifting lug.
Furthermore, the data monitoring and processing unit comprises a sensor integration box, one end of the sensor integration box is provided with a threaded hole, the threaded hole is in threaded connection with the extending end of the anchor rod, the other end of the sensor integration box is provided with a connecting block, the connecting block is connected with the other end of the second steel wire rope, and a sensor output port is further formed in the sensor integration box.
Furthermore, a cushion pad is arranged below the impact weight, the cushion pad is placed on the ground, and the base is provided with a lengthening plate in the direction perpendicular to the pressure-bearing beam.
The utility model provides a testing method of testing arrangement is drawn to underworkings side group stock developments, it includes following step:
s1, adjusting the height and angle of the energy conduction unit according to the height and inclination angle of the anchor rod to be measured, so that the height and angle of the energy conduction unit are matched with the height and inclination angle of the anchor rod to be measured;
s2, lifting the impact weight to a set height by a lifting connecting mechanism of the energy impact unit, and releasing to form impact energy;
s3, the energy conduction unit conducts impact energy generated by the energy impact unit to the outward extending end of the anchor rod, so that the outward extending end of the anchor rod is subjected to impact force in the axial direction;
and S4, monitoring the impact resistance data of the anchor rod by the data monitoring and processing unit.
Further, the step S1 includes:
s11, opening screws on the sliding block according to the height and the inclination angle of the anchor rod to be measured, and enabling the sliding block to be adjusted in height up and down along the supporting upright posts;
s12, adjusting the angle of the second steel wire rope to be consistent with the angle of the anchor rod to be detected, tightening the screw on the sliding block, and locking the sliding block on the supporting upright post;
and S13, connecting the adjusting weight with a second protruding end on the special-shaped fixed pulley through a third steel wire rope to tension the second steel wire rope.
Further, the step S2 includes:
s21, connecting the impact weight with a self-discharging lifting hook through a first steel wire rope, and connecting the impact weight with a third protruding end cantilever of the special-shaped fixed pulley through a fourth steel wire rope;
and S22, lifting the impact weight to a set height by using the chain block, confirming the safety of the field environment, and releasing the impact weight by using the self-discharging lifting hook to generate impact energy.
Further, the step S4 includes: and monitoring the impact energy parameter by using a sensor integration box of the data monitoring and processing unit, and acquiring and processing data.
The beneficial effects of the utility model reside in that: lifting the impact weight to a set height through a lifting connecting mechanism of the energy impact unit and then releasing to form impact energy; then, the energy conduction unit conducts impact energy generated by the energy impact unit to the outward extending end of the anchor rod, so that the outward extending end of the anchor rod is subjected to impact force in the axial direction; finally, the data monitoring unit monitors the impact resistance data of the anchor rod, so that the in-situ test of the impact resistance of the anchor rod is realized, and real field data is obtained; and simultaneously, the utility model discloses an it strikes to provide sufficient impact energy after the impact heavy object is adjustable, and it can be adapted to multiple stock and arrange the condition, and the impact energy regulation and control is convenient, and the result is easily analyzed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a working state diagram of the dynamic drawing testing device for the side wall anchor rod of the underground tunnel of the utility model;
FIG. 2 is a schematic structural view of the dynamic drawing testing device for the side wall anchor rod of the underground tunnel of the present invention;
FIG. 3 is a schematic structural view of a special-shaped fixed pulley of the dynamic drawing testing device for the side wall anchor rod of the underground tunnel;
FIG. 4 is a schematic structural diagram of an impact weight of the dynamic drawing testing device for the side wall anchor rod of the underground tunnel of the present invention;
fig. 5 is a schematic structural diagram of a sensor integrated box of the dynamic drawing testing device for the side wall anchor rod of the underground tunnel of the invention;
fig. 6 is a method flowchart of the testing method of the dynamic drawing testing device for the side wall anchor rod of the underground tunnel.
In the figure:
1-anchor rod;
2-a pressure-bearing beam;
3-supporting the upright column;
4-a base;
5-energy impact unit, 51-impact weight, 511-supporting plate, 512-middle straight rod, 513-weight plate, 514-lifting lug, 52-manual lifting block, 53-self-discharging lifting hook and 54-first steel wire rope;
6-energy conducting unit, 61-sliding block, 62-pulley rod, 63-special-shaped fixed pulley, 631-first protruding end, 632-second protruding end, 633-third protruding end, 64-second steel wire rope, 65-third steel wire rope, 66-fourth steel wire rope, 67-adjusting weight;
7-data monitoring unit, 71-sensor integrated box, 72-threaded hole, 73-connecting block, 74-sensor output port;
8-a buffer pad;
9-lengthening plate.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
Referring to fig. 1-4, the utility model discloses a testing arrangement is drawn to underworkings side group stock developments, during anchor rod 1 worn to establish the country rock in tunnel, anchor rod 1 had overhanging end, and overhanging end is worn out to the outside of tunnel country rock, and testing arrangement includes:
the left side and the right side of the lower surface of the pressure-bearing beam 2 are respectively provided with a support upright 3, and the bottom of the support upright 3 is provided with a base 4;
the energy impact unit 5 comprises a lifting connection mechanism and an impact weight 51, one end of the lifting connection mechanism is connected with the center of the lower surface of the pressure-bearing beam 2, the other end of the lifting connection mechanism is connected with the impact weight 51, and the lifting connection mechanism is used for lifting the impact weight 51 to a set height and then releasing the impact energy;
the energy conduction unit 6 is respectively connected with the energy impact unit 5 and the overhanging end of the anchor rod 1, and the energy conduction unit 6 is used for conducting impact energy generated by the energy impact unit 5 to the overhanging end of the anchor rod 1 so as to enable the overhanging end of the anchor rod 1 to be impacted in the axial direction;
and the data monitoring unit 7 is used for monitoring the impact resistance data of the anchor rod 1.
The utility model uses the lifting connecting mechanism of the energy impact unit 5 to lift the impact heavy object 51 to a set height and then release the impact energy; then, the energy conduction unit 6 conducts impact energy generated by the energy impact unit 5 to the overhanging end of the anchor rod 1, so that the overhanging end of the anchor rod 1 is subjected to impact force in the axial direction; finally, the data monitoring unit 7 monitors the impact resistance data of the anchor rod 1, so that the impact resistance of the anchor rod 1 is tested in situ, and real field data is obtained; and simultaneously, the utility model discloses an it provides sufficient impact energy to strike stock 1 after the impact heavy object 51 is adjustable, and it can be adapted to multiple stock 1 and arrange the condition, and the impact energy regulation and control is convenient, and the result is easily analyzed.
Specifically, the utility model discloses a promote coupling mechanism includes manual hoist 52, self-discharging lifting hook 53 and first wire rope 54, and the upper portion of manual hoist 52 puts with the lower surface central point of pressure-bearing crossbeam 2 and is connected, and the lower part of manual hoist 52 is connected with self-discharging lifting hook 53, but self-discharging lifting hook 53 is connected with the one end self-discharging formula of first wire rope 54, and the other end of first wire rope 54 is connected with impact heavy object 51.
The utility model discloses in, strike heavy object 51 can be the great metal of density to for the demountable assembly design, utilize first wire rope 54 to be connected impact heavy object 51 and self-discharging lifting hook 53, can accomplish the automatic lifting and the release process that strike heavy object 51 through self-discharging lifting hook 53, obtain impact energy.
Specifically, the utility model discloses an impact heavy object 51 includes layer board 511, middle straight-bar 512 and a plurality of heavy object board 513, and the both sides of layer board 511 are equipped with lug 514, and middle straight-bar 512 sets up the upper surface central point department at layer board 511 vertically, and a plurality of heavy object boards 513 wear to establish on middle straight-bar 512 after range upon range of in proper order, and wherein, the top of middle straight-bar 512 is higher than the heavy object board 513 of the superiors, and the top of middle straight-bar 512 is connected with first wire rope 54's the other end. The utility model discloses an impact heavy object 51 is formed by the stack of foraminiferous heavy object board 513 in the middle of the multilayer, forms different impact weight through the stack quantity that changes heavy object board 513 to conveniently adjust impact energy. In this embodiment, the middle straight rod 512 is mainly used to limit the position of the weight plate 513 and is connected to the self-discharging hook 53.
The utility model discloses an energy conduction unit 6 includes:
the sliding block 61 is connected to the supporting upright post 3 in a sliding manner, and the sliding block 61 can be locked on the supporting upright post 3 through screws;
the pulley lever 62 is horizontally arranged and close to one side of the anchor rod 1, and the left side and the right side of the pulley lever 62 are respectively connected with the sliding block 61;
the special-shaped fixed pulley 63 is rotatably arranged in the middle of the pulley rod 62; first to third protruding ends (631 and 633) are arranged on the outer circumferential surface of the special-shaped fixed pulley 63 at intervals;
one end of the second steel wire rope 64 is fixedly connected with the first protruding end 631, and the other end of the second steel wire rope 64 is connected with the protruding end of the anchor rod 1 through the data monitoring and processing unit 7; and the axis of the second wire rope 64 is collinear with the axis of the anchor rod 1;
one end of the third steel wire rope 65 is fixedly connected with the second protruding end 632, and the other end of the third steel wire rope 65 is connected with the adjusting heavy object 67;
one end of a fourth wire rope 66 is connected to the cantilevers at the two sides of the third protruding end 633, and the other end of the fourth wire rope 66 is connected to the lifting lug 514.
The utility model discloses in, adjust the high position of trolley pole 62 on support post 3 through sliding block 61 to realize position locking through the screw elasticity. The pulley lever 62 mainly provides an attachment point for the shaped fixed pulley 63. The third protruding end 633 of the special-shaped fixed pulley 63 is connected with the impact weight 51 through the fourth steel wire rope 66, so that the impact energy of the impact weight 51 is transmitted to the special-shaped fixed pulley 63, and when the impact weight 51 generates the impact energy, the special-shaped fixed pulley 63 can be driven to rotate, the first protruding end 631 is driven to rotate, and the impact energy acts on the outward extending end of the anchor rod 1. In this embodiment, the second protruding end 632 is connected to the adjusting weight 67 through the third wire rope 65, and is used for tensioning the second wire rope 64.
Referring to fig. 5, the utility model discloses a data monitoring processing unit 7 includes the integrated box 71 of sensor, and the one end of the integrated box 71 of sensor is equipped with screw hole 72, screw hole 72 and the overhanging end threaded connection of stock 1, and the other end of the integrated box 71 of sensor is equipped with connecting block 73, and connecting block 73 is connected with the other end of second wire rope 64, wherein, still is equipped with sensor output port 74 on the integrated box 71 of sensor. The utility model discloses in, data transmission line connects to sensor output port 74, carries out data acquisition by the computer etc.. One end of the integrated sensor box 71 is connected with the anchor rod 1, the other end of the integrated sensor box is connected with the second steel wire rope 64, and the integrated sensor box is internally composed of an acceleration sensor, a speed sensor, a force sensor, a data acquisition unit, a power supply and the like, so that data change in the impact process is monitored.
The utility model discloses in, the below of assaulting heavy object 51 is equipped with blotter 8, and blotter 8 places subaerial, and base 4 is equipped with extension board 9 in the direction of perpendicular to pressure-bearing crossbeam 2. In this embodiment, the base 4 is of an elongated design (elongated plate 9) in the horizontal direction of impact, mainly to prevent the device from toppling over, while the bottom is provided with a cushion 8 mainly for: provides cushioning for the impact weight 51, reducing the risk.
Referring to fig. 6, the utility model discloses a testing method of testing arrangement is drawn to underworkings side group stock developments, it includes following step:
s1, adjusting the height and angle of the energy conduction unit 6 according to the height and inclination angle of the anchor rod 1 to be measured, so that the height and angle of the energy conduction unit 6 are matched with the height and inclination angle of the anchor rod 1 to be measured; in this embodiment, after each part of the test apparatus is brought into the downhole test detection position, the ground needs to be processed to ensure a certain flatness, and then the apparatus main body is assembled.
S2, the lifting connection mechanism of the energy impact unit 5 lifts the impact weight 51 to a set height and then releases the impact energy to form impact energy;
s3, the energy conduction unit 6 conducts impact energy generated by the energy impact unit 5 to the overhanging end of the anchor rod 1, so that the overhanging end of the anchor rod 1 is impacted in the axial direction;
and S4, the data monitoring and processing unit 7 monitors the impact resistance data of the anchor rod 1.
Specifically, step S1 of the present invention includes:
s11, opening screws on the sliding block 61 according to the height and the inclination angle of the anchor rod 1 to be measured, and enabling the sliding block 61 to be adjusted in height up and down along the supporting upright post 3;
s12, adjusting the angle of the second steel wire rope 64 to be consistent with the angle of the anchor rod 1 to be tested, tightening the screw on the sliding block 61, and locking the sliding block 61 on the supporting upright post 3;
and S13, connecting the adjusting weight 67 with a second protruding end 632 on the special-shaped fixed pulley 63 through a third steel wire rope 65, and tensioning the second steel wire rope 64.
Specifically, step S2 of the present invention includes:
s21, connecting the impact weight 51 with a self-discharging hook 53 through a first wire rope 54, and connecting the impact weight 51 with a third protruding end 633 of the special-shaped fixed pulley 63 in a cantilever manner through a fourth wire rope 66;
and S22, lifting the impact weight 51 to a set height by using the chain block 52, confirming the safety of the field environment, and releasing the impact weight 51 by using the self-discharging hook 53 to generate impact energy.
The utility model discloses the energy transfer mode in step S3 does: when the impact weight 51 generates impact energy, the irregular fixed pulley 63 can be driven to rotate, so as to drive the first protruding end 631 to rotate, and further apply acting force to the extending end of the anchor rod 1 through the second steel wire rope 64.
Specifically, step S4 of the present invention includes: and monitoring the impact energy parameter by using a sensor integration box of the data monitoring and processing unit 7, and acquiring and processing data. Specifically, the influence degree of the anchor rod 1 due to the impact is observed and checked, whether the extending end of the anchor rod is loosened, extends out of the distance and the like is detected, and the influence degree is evaluated according to the impact energy.
The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (6)
1. The utility model provides a testing arrangement is drawn to underworkings side group stock developments, the stock is worn to establish in the country rock in tunnel, the stock has overhanging end, overhanging end wear out to the outside of tunnel country rock, its characterized in that, testing arrangement includes:
the left side and the right side of the lower surface of the pressure-bearing beam are respectively provided with a support upright post, and the bottom of each support upright post is provided with a base;
the energy impact unit comprises a lifting connection mechanism and an impact weight, one end of the lifting connection mechanism is connected with the center of the lower surface of the pressure-bearing beam, the other end of the lifting connection mechanism is connected with the impact weight, and the lifting connection mechanism is used for lifting the impact weight to a set height and then releasing the impact weight to form impact energy;
the energy conduction unit is respectively connected with the energy impact unit and the overhanging end of the anchor rod and is used for conducting impact energy generated by the energy impact unit to the overhanging end of the anchor rod so as to enable the overhanging end of the anchor rod to be impacted in the axial direction;
and the data monitoring unit is used for monitoring the impact resistance data of the anchor rod.
2. The dynamic pulling test device for the underground roadway side anchor rod according to claim 1, wherein the lifting connection mechanism comprises a manual lifting hoist, a self-discharging lifting hook and a first steel wire rope, the upper part of the manual lifting hoist is connected with the center of the lower surface of the pressure-bearing cross beam, the lower part of the manual lifting hoist is connected with the self-discharging lifting hook, the self-discharging lifting hook is connected with one end of the first steel wire rope in a self-discharging manner, and the other end of the first steel wire rope is connected with the impact weight.
3. The dynamic pulling test device for the underground roadway side anchor rod according to claim 2, wherein the impact weight comprises a supporting plate, a middle straight rod and a plurality of weight plates, lifting lugs are arranged on two sides of the supporting plate, the middle straight rod is vertically arranged at the center of the upper surface of the supporting plate, the weight plates are sequentially stacked and then penetrate through the middle straight rod, the top of the middle straight rod is higher than the weight plate on the uppermost layer, and the top of the middle straight rod is connected with the other end of the first steel wire rope.
4. The dynamic pull test device for the underground roadway side anchor rod according to claim 3, wherein the energy conduction unit comprises:
the sliding block is connected to the supporting upright in a sliding mode and can be locked on the supporting upright through screws;
the pulley lever is horizontally arranged and close to one side of the anchor rod, and the left side and the right side of the pulley lever are respectively connected with the sliding block;
the special-shaped fixed pulley is rotatably arranged in the middle of the pulley lever; first to third protruding ends are arranged on the outer circumferential surface of the special-shaped fixed pulley at intervals;
one end of the second steel wire rope is fixedly connected with the first protruding end, and the other end of the second steel wire rope is connected with the extending end of the anchor rod through the data monitoring and processing unit; and the axis of the second steel wire rope is collinear with the axis of the anchor rod;
one end of the third steel wire rope is fixedly connected with the second protruding end, and the other end of the third steel wire rope is connected with an adjusting heavy object;
and one end of the fourth steel wire rope is connected with the cantilevers on the two sides of the third protruding end, and the other end of the fourth steel wire rope is connected with the lifting lug.
5. The dynamic pulling test device for the anchor rod of the underground roadway side wall of claim 4, wherein the data monitoring and processing unit comprises a sensor integration box, one end of the sensor integration box is provided with a threaded hole, the threaded hole is in threaded connection with the extending end of the anchor rod, the other end of the sensor integration box is provided with a connecting block, the connecting block is connected with the other end of the second steel wire rope, and the sensor integration box is further provided with a sensor output port.
6. The dynamic pulling test device for the underground roadway side anchor rod according to claim 1, wherein a cushion pad is arranged below the impact weight, the cushion pad is placed on the ground, and the base is provided with an elongated plate in a direction perpendicular to the pressure-bearing cross beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020157741.1U CN211873078U (en) | 2020-02-10 | 2020-02-10 | Dynamic drawing testing device for side wall anchor rod of underground tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020157741.1U CN211873078U (en) | 2020-02-10 | 2020-02-10 | Dynamic drawing testing device for side wall anchor rod of underground tunnel |
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| Publication Number | Publication Date |
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| CN211873078U true CN211873078U (en) | 2020-11-06 |
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| CN202020157741.1U Active CN211873078U (en) | 2020-02-10 | 2020-02-10 | Dynamic drawing testing device for side wall anchor rod of underground tunnel |
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| Country | Link |
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| CN (1) | CN211873078U (en) |
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