CN110567823A - method for testing impact resistance of anchor rod anchoring body - Google Patents
method for testing impact resistance of anchor rod anchoring body Download PDFInfo
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- CN110567823A CN110567823A CN201910934858.8A CN201910934858A CN110567823A CN 110567823 A CN110567823 A CN 110567823A CN 201910934858 A CN201910934858 A CN 201910934858A CN 110567823 A CN110567823 A CN 110567823A
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
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Abstract
The invention relates to the technical field of mine support, and provides a method for testing the impact resistance of an anchor rod anchoring body, which comprises the following steps: prefabricating a rock mass model; anchoring an anchor rod in the rock mass model, and presetting anchoring pretightening force of the anchor rod; loading impact energy: impact energy acts on the rock mass model perpendicular to the axis of the anchor rod, and the axial force of the anchor rod is detected. The method for testing the impact resistance of the anchor rod anchoring body provided by the invention tests the impact resistance of the anchor rod anchoring body and provides guidance for the design of roadway anchor rod support with rock burst.
Description
Technical Field
the invention relates to the technical field of mine support, in particular to a method for testing the shock resistance of an anchor rod anchoring body.
Background
With the gradual development of coal resources in China, the mining depth of the coal resources gradually develops from shallow to deep, and the mining of the deep coal resources is often accompanied by coal and rock dynamic disasters such as rock burst, coal and gas outburst and the like, thereby seriously threatening the safety production of mines.
Rock burst mainly occurs in a roadway, and the prevention and control of the rock burst roadway is always a difficult point for preventing and controlling the rock burst. When the energy of rock burst is low during tunneling, the integrity of the anchor bolt supporting roadway is basically kept; however, when the energy of rock burst is large, the anchoring failure of the anchor bolt supported roadway is very easy to occur under dynamic load.
The anchor rod anchoring body is a combined structure of the anchor rod and the rock mass after the anchor rod is anchored in the rock mass. The impact performance of the anchor rod anchoring body is influenced by a plurality of factors, the impact performance of the anchor rod anchoring body is influenced by different factors to different degrees, the influence rule of the different factors on the impact performance of the anchor rod anchoring body is difficult to obtain by adopting a theoretical analysis and numerical simulation method, and meanwhile, the scientific test on the impact performance of the anchor rod anchoring body is difficult to realize by the conventional test method.
At present, an empirical method is generally adopted in roadway support design of rock burst, a support design method lacks theoretical basis and test data support, and the prior art can only test the static load and the dynamic performance of the mechanical properties of a bolt body material and the mechanical properties of rock bodies such as coal rock bodies, but cannot test the impact performance of an anchor bolt anchoring body.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method for testing the impact resistance of the anchor rod anchoring body, which is used for testing the impact resistance of the anchor rod anchoring body and providing guidance for the design of roadway anchor rod support with rock burst.
According to the method for testing the impact resistance of the anchor rod anchoring body, disclosed by the embodiment of the first aspect of the invention, the method comprises the following steps:
Prefabricating a rock mass model;
Anchoring an anchor rod in the rock mass model, and presetting anchoring pretightening force of the anchor rod;
Loading impact energy: impact energy acts on the rock mass model perpendicular to the axis of the anchor rod, and the axial force of the anchor rod is detected.
According to the method for testing the impact resistance of the anchor rod anchoring body, disclosed by the embodiment of the invention, the impact energy is perpendicular to the axial direction of the anchor rod and acts on the rock mass model, the acting force of rock burst on an actual rock mass is simulated, and a theoretical basis and test data reference are provided for anchor rod support design and construction in a rock burst roadway.
according to one embodiment of the invention, the process of loading the impact energy acquires a change image of the rock mass model.
According to one embodiment of the invention, the process of loading the impact energy is realized by a drop weight tester, and the height of a drop weight on the drop weight tester is adjusted to adjust the preset impact energy.
According to one embodiment of the invention the drop hammer acts on the lengthwise centre of the rock mass model.
According to one embodiment of the invention, before the impact energy loading process, a rock mass model anchored with the anchor rod is fixed on a supporting platform, and the rock mass model is in a two-end supporting state.
according to one embodiment of the invention, in the impact energy loading process, the impact energy loading rule is adjusted according to the pretightening force, the material or the anchoring mode of the anchor rod.
According to one embodiment of the invention, the anchoring means comprises full length anchoring, partial anchoring and non-anchoring.
According to one embodiment of the invention, the anchor pre-tightening force of the anchor rod is realized by adjusting the torque of the nut on the anchor rod.
according to one embodiment of the invention, in the process of prefabricating the rock mass model, an anchoring hole is reserved: and pre-burying a pipe fitting in the rock mass model, and taking out the pipe fitting after the rock mass model is initially set.
According to one embodiment of the invention, the axial force of the anchor rod is measured by an axial force sensor connected thereto.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
The method is used for testing the impact resistance of the anchor rod anchoring body, and the impact energy acts on the rock mass model in the direction perpendicular to the axial direction of the anchor rod, so that theoretical basis and test data reference can be provided for the anchor rod support design and construction of the rock burst roadway.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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 the drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for testing impact resistance of an anchor rod anchoring body provided by an embodiment of the invention;
FIG. 2 is a structural schematic diagram of a relationship between an anchor rod and a rock mass model in the method for testing the impact resistance of the anchor rod anchoring body provided by the embodiment of the invention;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic structural diagram of a testing apparatus of the method for testing impact resistance of the anchor rod anchoring body provided by the embodiment of the invention;
Reference numerals:
1: a threaded segment; 2: an anchor rod; 3: a rock mass model; 4: an anchoring hole; 5: dropping a hammer; 6: a nut; 7: a tray; 8: an axial force sensor; 9: and supporting the platform.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
in the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
in the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
in embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Referring to fig. 1 to 4, an embodiment of the present invention provides a method for testing impact resistance of an anchor, including:
prefabricating a rock mass model 3;
The anchor rod 2 is anchored in the rock mass model 3, and anchoring pre-tightening force of the anchor rod 2 is preset;
Loading impact energy: impact energy acts on the rock mass model 3 perpendicular to the axis of the anchor rod 2, and the axial force of the anchor rod 2 is detected.
Prefabricated rock mass model 3, according to the actual rock mass range equal proportion prefabrication of stock 2 anchor, and the structural strength of rock mass model 3 needs to keep unanimous with the structural strength of actual rock mass to guarantee the accuracy of test result. The dimension change of the rock mass model 3 is used for testing different support ranges of the anchor rod 2 to the actual rock mass, and theoretical guidance is provided for the support distance of the anchor rod 2 in actual construction.
The strength of the rock mass model 3, the anchoring mode of the anchor rod 2 in the rock mass model 3, the pretightening force of the anchor rod 2 and the impact energy are all adjustable variables. And carrying out test tests on different anchoring modes to obtain the influence of the different anchoring modes on the anchoring effect of the anchor rod 2. And testing different pre-tightening forces to obtain the influence of the different pre-tightening forces on the anchoring effect of the anchor rod 2. And carrying out test tests on different impact energies to obtain the impact resistance of the anchor rod 2.
Different sizes of the rock mass model 3, different anchoring modes, different pretightening forces and different impact energies are combined to form a plurality of test conditions, and the test method of the embodiment obtains the change condition of the axial force corresponding to each test condition so as to obtain the impact resistance of the anchor rod 2.
And (3) breaking the anchor rod 2 in the anchor rod anchoring body to be used as a criterion for judging the failure of the anchor rod anchoring body. Under the preset test condition, impact energy is loaded, and then the change process of the axial force of the anchor rod 2 is detected to obtain whether the anchor rod 2 is broken or not. Before the impact energy is loaded, the axial force of the anchor rod 2 is a fixed value related to the pretightening force. After the impact energy is loaded, when the axial force of the anchor rod 2 becomes 0, the impact energy is shown to exceed the bearing range of the anchor rod 2, the anchor rod 2 is broken, and the anchor body of the anchor rod fails; when the axial force of the anchor rod 2 is still a fixed value other than 0 (in general, after impact energy is loaded, the measured axial force is greater than the initial axial force), it indicates that the anchor rod 2 can bear the impact energy, the anchor rod 2 is not broken, and the anchor rod anchoring body is not failed.
According to the embodiment, after the impact energy loading is completed every time, the anchor rod anchoring body is replaced, and then the test under other test conditions is carried out, so that the test accuracy is ensured.
The impact resistance testing method of the embodiment can test the impact resistance of the anchor rod anchoring body, can measure the influence of variables such as the rock mass model 3, the pretightening force and the anchoring mode on the impact resistance of the anchor rod anchoring body, and can provide theoretical basis and test data reference for the support design and construction of the rock bolt 2 of the rock burst roadway. When underground rock burst occurs, most rock bodies and anchor rods are laterally impacted, which is equivalent to the direction perpendicular to the axial direction of the anchor rods, impact energy is loaded in the direction perpendicular to the axial direction of the anchor rods, the underground rock burst is closer to the actual working condition on site, and the test result guides the actual engineering application to be more scientific and reasonable. And impact energy is loaded in a direction perpendicular to the axial direction of the anchor rod, so that the axial force of the anchor rod cannot be interfered, and the measured axial force of the anchor rod is more accurate.
Compared with the existing test method which can only realize the test of the static load or the dynamic load of the single anchor rod 2 or the single rock, the test method of the embodiment can realize the comprehensive test of the anchor rod anchoring body, the test data is more accurate and comprehensive, and the method can provide guidance for the support design of the rock bolt 2 of the rock burst roadway.
In another embodiment, during the process of loading the impact energy, a change image of the rock mass model 3 is collected, the image is used for recording the surface crack condition of the rock mass model 3, and the rock mass fracture condition can be indicated through the surface crack of the rock mass model 3. Wherein, the collection of the change image can be realized by a high-speed camera, and the shooting speed of the high-speed camera is 3000-5000 pieces per second.
In another embodiment, the process of loading impact energy is realized by a drop weight tester, and the height of the drop weight 5 on the drop weight tester is adjusted to adjust the preset impact energy. In addition, the drop weight 5 of the drop weight tester can be replaced to adjust the impact energy.
In the test process, the loading mode of the impact energy can be from small to large, the impact energy can be set to 500J, 1000J, 1500J, 2000J and the like, and the impact energy can be adjusted according to the applicable working condition of the anchor rod anchoring body.
In another embodiment, the drop hammer 5 acts on the length direction center of the rock mass model 3, when impact energy is loaded, the two ends of the rock mass model 3 are prevented from moving due to uneven stress, the stability of the rock mass model 3 is improved, and the mode of loading the impact energy to the length direction center of the rock mass model 3 is close to the stress condition of the actual rock mass.
In another embodiment, before the impact energy is loaded, the rock mass model 3 anchored with the anchor rod 2 is fixed on the supporting platform 9, the rock mass model 3 is in a two-end supporting state, and the two-end supporting state is more consistent with the stress state of an actual rock mass, so that the test result is closer to the actual effect. Be equipped with the spherical surface supporting shoe (generally for the hemisphere piece) on supporting platform 9, rock mass model 3 places on the spherical surface supporting shoe, and rock mass model 3 is receiving the impact after, and the support mode remains unchanged, supports for the plane, and it is little to the interference of axial force detection accuracy.
In another embodiment, the impact energy loading process is carried out, and the impact energy loading rule is adjusted according to the strength and the pretightening force of the rock mass model 3 of the anchor rod 2, the mechanical property of the anchor rod 2 or the anchoring mode. For different pre-tightening forces of the anchor rod 2, the loading law of the impact energy can be adjusted accordingly. For example, the pre-tightening force of the anchor rod 2 is 10KN, the impact energy can be subjected to loading tests according to the sequence of 500J, 1000J, 1500J and 2000J, if the impact energy is 1500J, the anchor rod 2 is broken, the impact energy is 2000J, the test is not carried out, and the impact energy between 1000J and 1500J is tested; the pre-tightening force of the anchor rod 2 is 15KN, the impact energy can be subjected to loading tests according to the sequence of 1500J, 2000J and 2500J, and if the impact energy is 2000J and the anchor rod 2 is broken, the impact energy between 1500J and 2000J is tested. Because the pretightning force of stock 2 is different, and the anchor bolt 2 is strutted the effect difference, and the impact energy that can bear also is different, according to actual need, formulates different test scheme to save test time, reduce the test cost.
in the same way, the rock mass model 3 has different strength, the anchor rod 2 has different mechanical properties or different anchoring modes, and the loading law of the impact energy can be adjusted accordingly.
Furthermore, the anchoring mode comprises full-length anchoring, local anchoring and non-anchoring, and the impact resistance of three different anchoring modes is tested to provide guidance for the anchoring mode in practical application. Whether anchoring is carried out is determined by whether an anchoring agent is filled in a gap between the anchor rod 2 and the anchoring hole 4, the anchor rod 2 adopts two modes of non-anchoring, local anchoring and full-length anchoring, and the anchor rod 2 directly penetrates through the anchoring hole 4 during non-anchoring; when the anchor rod is anchored in the full length, a gap between the anchor rod 2 and the anchoring hole 4 is filled with a slow anchoring agent, and the slow anchoring agent is slowly solidified after pre-tightening force is applied; and when local anchoring is performed, filling an anchoring agent in a preset position.
The mechanical property of the anchor rod 2 is related to the material and size of the anchor rod, and the material of the anchor rod 2 can be HRB No. 400 steel bars (common hot-rolled deformed steel), HRB No. 500 steel bars (high-strength hot-rolled deformed steel), CRM No. 600 steel bars (heat-treated high-strength deformed steel) and other forms. The strength of the rock mass model 3 can be related to the thickness, the width and other dimensions, and also related to the material quality. The rock mass model 3 can be made of cement mortar or underground rock.
In another embodiment, the anchoring pretightening force of the anchor rod 2 is realized by adjusting the torque of the nut 6 on the anchor rod 2, and the adjusting mode is simple and convenient. The nut 6 is a high-strength nut and has stable performance.
In another embodiment, the process of prefabricating the rock mass model 3, the anchoring holes 4 are reserved: pipe fittings are pre-buried in the rock mass model 3, and the pipe fittings are taken out after the rock mass model 3 is initially set. The size specification of the anchoring hole 4 is different according to the size of the anchor rod 2, the anchoring mode and the like. The mode of reserving anchor hole 4, processing is simple and convenient, the process of drilling has been saved, raise the efficiency.
in another embodiment, the axial force of the anchor rod 2 is measured by an axial force sensor 8 connected thereto. Rock mass model 3 is all stretched out at the both ends of stock 2, and the one end coupling nut 6 of stock 2 provides the pretightning force, and gasket and axial force sensor 8 are connected to the other end of stock 2, and axial force sensor 8 installs in the loading end (the link of nut 6) of keeping away from the pretightning force promptly, reduces the interference of pretightning force to the axial force, improves experimental precision.
Meanwhile, the axial force sensor 8 can also be used for measuring the pretightening force, the pretightening force is displayed through the display of the axial force sensor 8, and the measuring mode is simple and convenient.
In addition, in the above examples, the test of each condition was repeated at least three times to improve the accuracy of the test results.
The following provides, one embodiment of the present invention:
(1) Prefabricating a rock mass model 3;
As shown in fig. 2 and 3, the rock mass model 3 can be made of cement mortar or downhole rock, the size is 150 × 1000mm, the strength of the cement mortar is 40-50MPa, the aggregate is river sand, the setting agent is cement and water, the cement is 52.5 grade cement: sand and water in a ratio of 1:2:0.5, and curing time is 28 days.
In the process of manufacturing the rock mass model 3, an anchoring hole 4 is reserved in the rock mass model 3 and used for inserting the anchor rod 2 for anchoring, the diameter of the anchoring hole 4 is 20mm, the steel pipe or the white plastic pipe is manufactured in a pre-embedded mode of 20mm, and the steel pipe or the plastic pipe is pulled out after the rock mass model 3 is initially set.
(2) The anchor rod 2 is anchored in the rock mass model 3, and anchoring pre-tightening force of the anchor rod 2 is preset;
adopt length to be 1400mm, the stock 2 that the diameter is 22mm carries out lathe processing to it, processes into 2mm length of stock, and 2mm section diameters in the middle part of stock are processed into 10 mm's anchor section, and the each 200mm fixed department stock 2 diameter 16mm in both ends, and the both ends diameter 16mm section is processed into the screw thread and is formed screw thread section 1 to join in marriage nut 6 in one end, generally be high strength nut 6.
Anchor rod 2 nut 6 will match tray 7, generally is the flat tray, and tray 7 adopts the steel sheet processing to make, and steel sheet thickness 10mm, the size is 50mm, can exert the pretightning force through screwing up nut 6.
The anchor rod 2 is inserted into the anchoring hole 4, the tray 7 and the axial force sensor 8 are sequentially installed on the threaded section 1 at one end of the anchor rod 2, the nut 6 is installed on the threaded section 1 at the other end of the anchor rod 2, and the pre-tightening force of the anchor rod 2 can be determined by applying torque through the nut 6.
The axial force sensor 8 is used for measuring the axial force of the anchor rod 2, the axial force sensor 8 is installed in the threaded section 1 far away from one end of the mounting nut 6, and the axial force sensor 8 is separated from the rock mass model 3 through the tray 7.
(3) Loading impact energy:
as shown in fig. 4, the rock mass model 3 anchored with the anchor 2 forms an anchor anchoring body, the anchor anchoring body is placed on the supporting platform 9, the drop hammer 5 is placed at a set height to set impact energy, the drop hammer 5 drops to load the impact energy to the anchor anchoring body, and the axial force of the anchor 2 is detected.
The impact resistance of the anchor rod anchoring body is comprehensively analyzed by testing the influence of each parameter on the impact resistance of the anchor rod anchoring body by changing the parameters of the rock mass model 3 such as strength, the material of the anchor rod 2, the pretightening force of the anchor rod 2, the anchoring mode and the like; meanwhile, in the impact process of the drop hammer 5, a change image of the impact energy of the drop hammer 5 and the fracture condition of the rock mass model 3 can be obtained.
in combination with the above, according to the embodiment of the invention, the optimal support parameters of the anchor rod anchoring body are determined by accurately testing the influence degree of parameters such as the strength of the rock mass model 3, the mechanical property of the anchor rod 2, the pretightening force and the anchoring mode on the impact property of the anchor rod anchoring body. The impact performance of the anchor rod anchoring body can be obviously improved by optimizing and combining the factors, so that theoretical basis and test data reference are provided for the support design of the rock burst roadway anchor rod 2.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A method for testing the impact resistance of an anchor rod anchoring body is characterized by comprising the following steps:
Prefabricating a rock mass model;
Anchoring an anchor rod in the rock mass model, and presetting anchoring pretightening force of the anchor rod;
Loading impact energy: impact energy acts on the rock mass model perpendicular to the axis of the anchor rod, and the axial force of the anchor rod is detected.
2. the method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein the process of loading the impact energy is used for acquiring a change image of the rock mass model.
3. the method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein the process of loading the impact energy is realized by a drop weight tester, and the height of a drop weight on the drop weight tester is adjusted to adjust the preset impact energy.
4. The method for testing the impact resistance of the anchor anchoring body according to claim 3, wherein the drop hammer acts on the center of the rock mass model in the length direction.
5. The method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein a rock mass model anchored with the anchor rod is fixed on a supporting platform before the impact energy loading process, and the rock mass model is in a two-end supporting state.
6. The method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein in the process of loading the impact energy, the loading rule of the impact energy is adjusted according to the pretightening force, the material or the anchoring mode of the anchor rod.
7. The method for testing the impact resistance of the anchor rod anchoring body according to claim 6, wherein the anchoring manner comprises full-length anchoring, partial anchoring and non-anchoring.
8. The method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein the anchoring pretightening force of the anchor rod is realized by adjusting the torque of a nut on the anchor rod.
9. The method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein in the process of prefabricating the rock mass model, an anchoring hole is reserved: and pre-burying a pipe fitting in the rock mass model, and taking out the pipe fitting after the rock mass model is initially set.
10. the method for testing the impact resistance of the anchor rod anchoring body according to claim 1, wherein the axial force of the anchor rod is measured by an axial force sensor connected thereto.
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| CN111929020A (en) * | 2020-08-14 | 2020-11-13 | 王�琦 | Method and system for testing impact resistance of underground engineering anchoring system |
| CN112067224A (en) * | 2020-09-18 | 2020-12-11 | 中煤科工开采研究院有限公司 | Detection method for whole-course dynamic load response characteristic of anchor rod in drop hammer impact mode |
| CN112377230A (en) * | 2020-10-28 | 2021-02-19 | 中煤科工开采研究院有限公司 | Anchor rod support combined member and metal net impact mechanical property testing device and method |
| CN112781979A (en) * | 2021-02-03 | 2021-05-11 | 中煤科工开采研究院有限公司 | Testing method of anchor rod lateral impact test bed |
| CN112798212A (en) * | 2021-02-03 | 2021-05-14 | 中煤科工开采研究院有限公司 | Anchor rod axial impact test bed and test method |
| CN112880958A (en) * | 2021-02-03 | 2021-06-01 | 中煤科工开采研究院有限公司 | Anchoring body axial shock resistance testing method and test bed |
| CN113899631A (en) * | 2021-10-25 | 2022-01-07 | 中煤科工开采研究院有限公司 | System and method for testing performance of anchored rock mass |
| CN114486572A (en) * | 2022-01-11 | 2022-05-13 | 天地科技股份有限公司 | Experimental device and method for preventing and controlling rock burst by cooperation of anchor rod support and anti-impact bracket |
| CN114720298A (en) * | 2022-05-10 | 2022-07-08 | 中国矿业大学(北京) | Dynamic and static mechanical property testing system and method for engineering rock mass |
| CN117030178A (en) * | 2023-07-26 | 2023-11-10 | 东北大学 | Test method for prestressed support reinforcing self-bearing support structure of broken rock mass |
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| CN111929020A (en) * | 2020-08-14 | 2020-11-13 | 王�琦 | Method and system for testing impact resistance of underground engineering anchoring system |
| CN112067224A (en) * | 2020-09-18 | 2020-12-11 | 中煤科工开采研究院有限公司 | Detection method for whole-course dynamic load response characteristic of anchor rod in drop hammer impact mode |
| CN112377230A (en) * | 2020-10-28 | 2021-02-19 | 中煤科工开采研究院有限公司 | Anchor rod support combined member and metal net impact mechanical property testing device and method |
| CN112798212B (en) * | 2021-02-03 | 2022-06-17 | 中煤科工开采研究院有限公司 | Anchor rod axial impact test bed and test method |
| CN112798212A (en) * | 2021-02-03 | 2021-05-14 | 中煤科工开采研究院有限公司 | Anchor rod axial impact test bed and test method |
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| CN112781979A (en) * | 2021-02-03 | 2021-05-11 | 中煤科工开采研究院有限公司 | Testing method of anchor rod lateral impact test bed |
| CN113899631A (en) * | 2021-10-25 | 2022-01-07 | 中煤科工开采研究院有限公司 | System and method for testing performance of anchored rock mass |
| CN114486572A (en) * | 2022-01-11 | 2022-05-13 | 天地科技股份有限公司 | Experimental device and method for preventing and controlling rock burst by cooperation of anchor rod support and anti-impact bracket |
| CN114486572B (en) * | 2022-01-11 | 2024-04-23 | 天地科技股份有限公司 | Experimental device and method for cooperatively preventing and controlling rock burst through anchor bolt support and impact-resistant support |
| CN114720298A (en) * | 2022-05-10 | 2022-07-08 | 中国矿业大学(北京) | Dynamic and static mechanical property testing system and method for engineering rock mass |
| CN117030178A (en) * | 2023-07-26 | 2023-11-10 | 东北大学 | Test method for prestressed support reinforcing self-bearing support structure of broken rock mass |
| CN117030178B (en) * | 2023-07-26 | 2024-04-12 | 东北大学 | Test method for prestressed support reinforcing self-bearing support structure of broken rock mass |
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