CN108362631B - Anchor rod or anchor cable corrosion resistance test device and test method thereof - Google Patents
Anchor rod or anchor cable corrosion resistance test device and test method thereof Download PDFInfo
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- CN108362631B CN108362631B CN201810035768.0A CN201810035768A CN108362631B CN 108362631 B CN108362631 B CN 108362631B CN 201810035768 A CN201810035768 A CN 201810035768A CN 108362631 B CN108362631 B CN 108362631B
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- 238000012360 testing method Methods 0.000 title claims abstract description 194
- 230000007797 corrosion Effects 0.000 title claims abstract description 48
- 238000005260 corrosion Methods 0.000 title claims abstract description 48
- 238000010998 test method Methods 0.000 title claims abstract description 6
- 238000004873 anchoring Methods 0.000 claims abstract description 135
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims description 26
- 239000003245 coal Substances 0.000 claims description 23
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- 230000008093 supporting effect Effects 0.000 claims description 18
- 238000005485 electric heating Methods 0.000 claims description 16
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 239000011435 rock Substances 0.000 claims description 12
- 230000007935 neutral effect Effects 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000003556 assay Methods 0.000 claims 1
- 239000012774 insulation material Substances 0.000 abstract 1
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- 239000003795 chemical substances by application Substances 0.000 description 10
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- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013142 basic testing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The utility model provides an stock or anchor rope corrosion resistance test device, including the test box and set up the anchor test frame in the test box, the front side of test box is provided with insulating door, and the box of test box and insulating door all adopt thermal insulation material to make, and the back lateral part and the bottom in the test box all are provided with the electrothermal tube, are provided with humidity control atomizer, temperature sensor and humidity transducer in the test box, and the right side in the test box is provided with the corrosive liquid injection hole, and the test box right side is provided with operation console. The invention also discloses a test method of the anchor rod or anchor cable corrosion resistance test device. The invention has the advantages of convenient control and adjustment of corrosion test environment, convenient matching of the test box, simple anchoring test frame of the anchor rod or the anchor cable, adjustable anchoring length of the anchoring test frame of the anchor rod or the anchor cable, convenient disassembly and repeated use of the anchor rod or the anchor cable, convenient and quick performance of various foundation tests, and the like.
Description
Technical Field
The invention belongs to the technical field of coal mine roadway support, and particularly relates to a corrosion resistance test device and a test method for an anchor rod or an anchor cable.
Background
At present, anchor rod or anchor cable support has become a safe and efficient main support mode of coal mine tunnel, and is widely popularized and applied in coal mine tunnels in China. The anchor rod or the anchor rope support is to anchor the anchor rod or the anchor rope in a coal rock body, screw a tail nut (lock) of the rod (rope), apply pretightening force to surrounding rocks, and restrict deformation separation layer, crushing expansion and sliding dislocation of the surrounding rocks of a roadway. The method has the advantages that the axial load and the axial deformation performance of the anchor rod or the anchor cable in the supporting process are researched, the anchor rod or the anchor cable supporting mechanism is deepened, the reliability of the anchor rod or the anchor cable is improved, and the safety of mine engineering is guaranteed.
Since the 90 s of the 20 th century, anchor rods or anchor cable supports have been widely used in roadway supports with remarkable technical and economic superiority, make up for the defects of the past supports, and are beneficial to ensuring the safe production of coal mines. However, in the supporting process, the working characteristics of the anchor rod or the anchor cable must be affected by the underground environment, and the anchor rod or the anchor cable passes through the stratum with different properties, so that the anchor rod or the anchor cable is easy to corrode under the action of corrosive media in the stratum and underground water, and the durability and the anchoring performance of the anchor rod or the anchor cable are seriously reduced. The working environment most suitable for the anchor rod or the anchor cable is researched, and corresponding measures are taken underground to enable the underground environment to be close to the working environment most suitable for the anchor rod or the anchor cable, so that the method has important significance for roadway support. The influence of acid and alkali on the corrosion of the anchor rod or the anchor cable is researched, the problem of the corrosion of the anchor rod or the anchor cable is solved, the working environment of the anchor rod or the anchor cable in the pit is favorably improved, the supporting strength of the anchor rod or the anchor cable is ensured, the supporting effect is improved, and the method plays an important role in the application and development of the anchoring technology, so that the safe and efficient production of a coal mine is ensured.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a corrosion resistance test device and a test method for an anchor rod or an anchor cable.
In order to solve the technical problems, the invention adopts the following technical scheme: the anchor rod or anchor cable corrosion resistance test device comprises a test box 1 and an anchoring test frame 3 arranged in the test box 1, wherein the anchor rod or anchor cable is anchored in the anchoring test frame 3;
the front side of the test box 1 is provided with an insulating door 12 used for entering and exiting the anchoring test frame 3, a transparent glass window 30 is arranged on the upper portion of the insulating door 12, the box body of the test box 1 and the insulating door 12 are made of insulating materials, electric heating pipes 7 of U-shaped structures are arranged on the rear side portion and the bottom portion in the test box 1, a humidity adjusting sprayer 6 is arranged on the top portion in the test box 1, a corrosive liquid injection hole 2 is arranged on the right side in the test box 1, a temperature sensor 16 and a humidity sensor 31 are arranged on the left side in the test box 1, an operation console 4 is arranged on the right side of the test box 1, an operation panel is arranged on the top portion of the operation console 4, and the inside of the operation console 4 is connected with the electric heating pipes 7, the humidity adjusting sprayer 6, the temperature sensor 16 and the humidity sensor 31 through control cables.
The anchoring test frame 3 comprises an anchoring test panel 5, a bottom plate 13, a front plate 17, a rear plate 18, a left side plate 32, a right side plate 21 and four full-thread high-strength studs 11, wherein the anchoring test panel 5 and the bottom plate 13 are horizontally arranged, the front plate 17, the rear plate 18, the left side plate 32 and the right side plate 21 are vertically arranged, the lower edges of the front plate 17 and the rear plate 18 are fixedly connected to the front side and the rear side of the upper surface of the bottom plate 13, the front side surface of the front plate 17 and the rear side surface of the rear plate 18 are fixedly provided with reinforcing frames 33, the left side plate 32 and the right side plate 21 are respectively and fixedly connected to the two reinforcing frames 33 on the left side and the two reinforcing frames 33 on the right side through bolt assemblies 19, and the bottom plate 13, the front plate 17, the rear plate 18, the left side plate 32 and the right side plate 21 are encircled to form an anchoring material filling cavity with an open top; the two full-thread high-strength studs 11 are positioned on the left side and the right side of the front part of the front plate 17, the other two full-thread high-strength studs 11 are positioned on the left side and the right side of the rear part of the rear plate 18, the four full-thread high-strength studs 11 are vertically arranged, the lower ends of the four full-thread high-strength studs 11 are fixed on the bottom plate 13, the four full-thread high-strength studs 11 correspondingly penetrate through the reinforcing frame 33 and are in jacking connection with the top of the reinforcing frame 33 through the fastening nuts 34, mounting holes corresponding to the four full-thread high-strength studs 11 are formed in four corners on the anchoring test panel 5, and the four full-thread high-strength studs 11 are in threaded connection with the positioning nuts 9 and the gaskets 10 which are respectively in pressure fit with the upper surface and the lower surface of the anchoring test panel 5; the anchoring test panel 5 is provided with a plurality of anchoring holes 8 for vertically penetrating anchor rods or anchor ropes.
The bottom of the bottom plate 13 is provided with a pulley 15, and the bottom inside the test chamber 1 is provided with a guide rail 14 in the front-rear direction for guiding and supporting the pulley 15 to roll back and forth.
The anchoring holes 8 are arranged in front and back rows on the anchoring test panel 5; four anchor holes 8 are arranged in the front row, the distance between two adjacent anchor holes 8 is 200mm, and the diameter of each anchor hole 8 is 50mm plus or minus 0.5mm; five anchor holes 8 are arranged in the rear row, the distance between two adjacent anchor holes 8 is 200mm, and the diameter of each anchor hole 8 is 32mm plus or minus 0.5mm.
The lower part of the front side of the test box 1 is provided with a guide slope 35 which is obliquely arranged at a lower front and a higher rear below the insulating and heat-insulating door 12, and the rear edge of the guide slope 35 is flush with the bottom surface of the test box 1.
The method for testing the corrosion resistance test device of the anchor rod or the anchor cable comprises the following steps:
pulling the anchoring test frame 3 out of the test box 1, and driving anchor rods or anchor cables into the anchoring test frame 3 outside the test box 1;
secondly, a pulley 15 at the bottom of the anchoring test stand 3 after being driven with an anchor rod or an anchor rope is pushed upwards and backwards along a guide slope 35 to be placed on a guide rail 14, the anchoring test stand 3 is pushed backwards, the pulley 15 moves backwards along the guide rail 14, and the anchoring test stand 3 is pushed into the test box 1;
thirdly, three corrosive liquid injection pipes extend into the test box 1 through the corrosive liquid injection holes 2, gaps between the three corrosive liquid injection pipes and the corrosive liquid injection holes 2 are sealed, the outlet end of each corrosive liquid injection pipe extends to the outer side of an anchor rod or an anchor cable below the anchoring test panel 5, and the three corrosive liquid injection pipes are fixed in place and then the insulating heat insulation door 12 is closed;
fourthly, an operation panel at the top of the operation console 4 is controlled, the electric heating tube 7 is started to heat the inside of the test box 1, the temperature sensor 16 and the humidity sensor 31 monitor the temperature and the humidity in the test box 1 respectively in real time, when the temperature in the test box 1 is higher than a set temperature, the set temperature is the temperature in a coal mine tunnel, the temperature sensor 16 sends a signal to the operation console 4, and the operation console 4 adjusts the heating power of the electric heating tube 7 to keep the temperature in the test box 1 stable; when the humidity in the test box 1 is lower than the set humidity, the set humidity is the humidity in the coal mine tunnel, the humidity sensor 31 sends a signal to the operation console 4, the operation console 4 sends a command signal to the humidity adjusting sprayer 6, and the humidity adjusting sprayer 6 sprays water mist into the test box 1 to adjust the humidity; simultaneously, the outside of the test box 1 is injected with corrosive liquid to the surface of the anchor rod or the anchor cable through three corrosive liquid injection pipes, and the corrosive liquid injected through the three corrosive liquid injection pipes is acid liquid, neutral liquid and alkaline liquid respectively;
fifthly, observing corrosion conditions of the anchor rods or the anchor cables through the transparent glass window 30 at intervals, and injecting the corrosion liquid again;
and (six) after 30 days, 60 days or 90 days of test, operating the operation panel at the top of the operation console 4, closing the electric heating tube 7, opening the insulating door 12, pulling the anchoring test frame 3 out of the test box 1, respectively carrying out pull tests on three anchor rods or anchor ropes by using an anchor rod pull meter, and detecting the corrosion of the three anchor rods or anchor ropes in acidic, neutral and alkaline environments by the pull tests, wherein the final result is that the corrosion to the anchor rods in the acidic environment is strongest, the second in the alkaline environment and the corrosion in the neutral environment is weakest.
The specific process of the step (one) is as follows: firstly, a prepared similar material is filled in an anchoring material filling cavity with an opening at the top, which is formed by surrounding a bottom plate 13, a front plate 17, a rear plate 18, a left side plate 32 and a right side plate 21, wherein the similar material is formed by laying rocks in a coal mine tunnel in a layered manner, compacting the similar material in the anchoring material filling cavity, using an anchor rod or anchor rope machine to downwards drive the anchor rod or anchor rope into the similar material on an anchoring test panel 5 through an anchoring hole 8, anchoring the anchoring material between the upper end of the anchor rod or anchor rope and the upper surface of the anchoring test panel 5, and simulating the anchoring process of the anchor rod or anchor rope support in the coal mine tunnel.
By adopting the technical scheme, the electric heating tube in the test box in the constant temperature and humidity environment is used for controlling the constant temperature, the variable temperature and the constant humidity of the space in the test box, and in order to enable the test effect to be more similar to the field environment, various corrosive liquids are directly injected into the annular gap between the anchor rod or the anchor cable and similar materials through the corrosive liquid injection hole on the right side of the test box, so that corrosion tests in different environments are carried out. Four full-thread high-strength studs of the anchoring test frame can be used for moving the anchoring test panel up and down to each position of the full-thread high-strength studs according to actual test conditions, and simultaneously, a front plate, a rear plate, a left side plate and a right side plate which are convenient to install and detach are matched, so that the purpose of flexibly adjusting the anchoring length of an anchor rod or an anchor cable is achieved; the positioning nuts matched with the full-thread high-strength stud can be synchronously moved through threads on the full-thread high-strength stud, so that the anchor rod or the anchor cable can be ensured to be applied with enough and accurate pretightening force. The anchoring device can be used for driving the anchor rod or the anchor rope into the box body through the fixed anchoring hole on the anchoring test panel by using the anchor rod or the anchor rope machine, simulating the anchoring process of supporting the anchor rod or the anchor rope of the coal mine roadway, detecting the mechanical characteristic change of an anchoring system and the anchoring effect of the anchor rod or the anchor rope, optimizing the quantity of the anchoring agents, carrying out an anchor rod or anchor rope anchoring force drawing test, observing the characteristic change between the anchoring interface of the anchoring agent and surrounding rock and the anchoring interface of the anchoring agent and the anchor rod or the anchor rope through the drawing test, and observing the using effect of the anchor rod or the anchor rope anchoring agent and the characteristics of the anchoring force. The different diameters of the anchoring holes can be used for testing the anchor rods or anchor ropes with different diameters.
The invention has the advantages of being capable of conveniently controlling and adjusting corrosion test environment, being convenient for matching with a test box, being capable of conveniently adjusting the anchoring length of a simple anchor rod or an anchor rope, being convenient for disassembling and repeatedly using the anchor rod or the anchor rope, being convenient and fast for various basic tests, reducing test cost, improving test efficiency, overcoming the defects of the prior art, ensuring that the simulation quality and test effect are close to field conditions, improving the research level of factors influencing the supporting strength of the anchor rod or the anchor rope under various corrosion environments for a coal mine tunnel, and ensuring the safe and reliable supporting of the coal mine tunnel.
The invention has simple and practical structure, novel and unique structure, can intuitively simulate the stress corrosion attenuation process of the anchor rod or the anchor cable in various corrosion environments, study the influence factors and solving measures of the anchor rod or the anchor cable in the corrosion environments of the roadway, can simulate the whole process of the supporting of the anchor rod or the anchor cable of the coal mine roadway through the anchor rod or the anchor cable corrosion test frame, is beneficial to the study of the supporting and anchoring construction process of the anchor rod or the anchor cable in the site, is beneficial to the detection of the supporting quality of the anchor rod or the anchor cable in the site, can study and simulate the anchoring process of the anchor rod or the anchor cable of the roadway according to the stress corrosion attenuation rule of the anchor rod or the anchor cable in various corrosion environments, study the anchor rod or the anchor cable anchoring mechanism, the interaction relation with surrounding rock, the stress distribution rule, the anchor rod or anchor cable anchoring body bearing characteristics, the anchor rod or anchor cable anchoring effect test and observe the use effect of the anchor rod or anchor cable anchoring agent, the characteristic analysis of anchoring force and the like of the anchor rod or the anchor cable, and the factors influencing the supporting strength of the anchor rod or the anchor cable in various corrosion environments are analyzed, and the factors of the anchor rod or anchor cable supporting strength are prevented from causing or anchor cable failure due to corrosion in the working site, thus causing accidents.
The whole test of the invention adopts a controlled variable method, and under the same corrosion environment, the external conditions of different temperatures and humidity are adopted to test the pulling force of the anchor rod or the anchor cable on the corrosion test frame, the anchoring force is measured, and the result is recorded; under the external conditions of the same temperature and humidity, adopting different corrosion environments to carry out corrosion tests on the anchoring body, then carrying out drawing force tests on the anchor rod or the anchor cable on the anchoring test frame, measuring the anchoring force, recording the result, comparing with the previous result, and obtaining the conclusion and providing corresponding prevention and treatment measures. The method can simulate and study the stress corrosion mechanism, anchoring mechanism, interaction relation with surrounding rock, stress distribution rule, anchor bearing characteristic of the anchor rod or the anchor cable, anchor rod or anchor cable anchoring effect test and observation of the using effect of the anchor rod or anchor cable anchoring agent, characteristics of anchoring force and other problems of the anchor rod or anchor cable under different corrosion environments in laboratory conditions, simulate the anchoring process of the coal mine roadway anchor rod or anchor cable support under laboratory conditions, analyze the anchor rod or anchor cable anchoring mechanism under complex conditions, interaction relation with the surrounding rock, stress distribution rule, anchor rod or anchor cable anchoring effect test and stress condition of the anchor rod or anchor cable, detect the information drilled by the anchor rod or anchor cable machine, change the mechanical characteristics of the anchor rod or anchor cable anchoring system, optimize the quantity of the anchor rod or anchor cable anchoring agent, repeatedly conduct anchor rod or anchor cable anchoring force drawing test, observe the characteristic change between the anchor agent and the anchoring interface of the surrounding rock, and the anchor rod or anchor cable anchoring agent, and the using effect of the anchor rod or anchor cable anchoring agent and the characteristics of the anchor rod or anchor cable anchoring force. Meanwhile, the method provides a simple platform for the stress corrosion mechanism of the roadway anchor rod or the anchor cable under the off-site condition, the influence factors of corrosion on the anchoring effect, the maximum influence of exploring which corrosion environment on the anchor rod or the anchor cable supporting strength and the real-time monitoring of the corrosion degree of the anchor rod or the anchor cable, and has a pushing effect on the research of the roadway anchor rod or the anchor cable supporting.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of a test chamber according to the present invention;
FIG. 3 is a schematic perspective view of an anchoring test stand according to the present invention.
Detailed Description
As shown in fig. 1 to 3, the corrosion resistance test device for the anchor rod or the anchor cable comprises a test box 1 and an anchoring test frame 3 arranged in the test box 1, wherein the anchor rod or the anchor cable is anchored in the anchoring test frame 3;
the front side of the test box 1 is provided with an insulating door 12 used for entering and exiting the anchoring test frame 3, a transparent glass window 30 is arranged on the upper portion of the insulating door 12, the box body of the test box 1 and the insulating door 12 are made of insulating materials, electric heating pipes 7 of U-shaped structures are arranged on the rear side portion and the bottom portion in the test box 1, a humidity adjusting sprayer 6 is arranged on the top portion in the test box 1, a corrosive liquid injection hole 2 is arranged on the right side in the test box 1, a temperature sensor 16 and a humidity sensor 31 are arranged on the left side in the test box 1, an operation console 4 is arranged on the right side of the test box 1, an operation panel is arranged on the top portion of the operation console 4, and the inside of the operation console 4 is connected with the electric heating pipes 7, the humidity adjusting sprayer 6, the temperature sensor 16 and the humidity sensor 31 through control cables.
The anchoring test frame 3 comprises an anchoring test panel 5, a bottom plate 13, a front plate 17, a rear plate 18, a left side plate 32, a right side plate 21 and four full-thread high-strength studs 11, wherein the anchoring test panel 5 and the bottom plate 13 are horizontally arranged, the front plate 17, the rear plate 18, the left side plate 32 and the right side plate 21 are vertically arranged, the lower edges of the front plate 17 and the rear plate 18 are fixedly connected to the front side and the rear side of the upper surface of the bottom plate 13, the front side surface of the front plate 17 and the rear side surface of the rear plate 18 are fixedly provided with reinforcing frames 33, the left side plate 32 and the right side plate 21 are respectively and fixedly connected to the two reinforcing frames 33 on the left side and the two reinforcing frames 33 on the right side through bolt assemblies 19, and the bottom plate 13, the front plate 17, the rear plate 18, the left side plate 32 and the right side plate 21 are encircled to form an anchoring material filling cavity with an open top; the two full-thread high-strength studs 11 are positioned on the left side and the right side of the front part of the front plate 17, the other two full-thread high-strength studs 11 are positioned on the left side and the right side of the rear part of the rear plate 18, the four full-thread high-strength studs 11 are vertically arranged, the lower ends of the four full-thread high-strength studs 11 are fixed on the bottom plate 13, the four full-thread high-strength studs 11 correspondingly penetrate through the reinforcing frame 33 and are in jacking connection with the top of the reinforcing frame 33 through the fastening nuts 34, mounting holes corresponding to the four full-thread high-strength studs 11 are formed in four corners on the anchoring test panel 5, and the four full-thread high-strength studs 11 are in threaded connection with the positioning nuts 9 and the gaskets 10 which are respectively in pressure fit with the upper surface and the lower surface of the anchoring test panel 5; the anchoring test panel 5 is provided with a plurality of anchoring holes 8 for vertically penetrating anchor rods or anchor ropes.
The bottom of the bottom plate 13 is provided with a pulley 15, and the bottom inside the test chamber 1 is provided with a guide rail 14 in the front-rear direction for guiding and supporting the pulley 15 to roll back and forth.
The anchoring holes 8 are arranged in front and back rows on the anchoring test panel 5; four anchor holes 8 are arranged in the front row, the distance between two adjacent anchor holes 8 is 200mm, and the diameter of each anchor hole 8 is 50mm plus or minus 0.5mm; five anchor holes 8 are arranged in the rear row, the distance between two adjacent anchor holes 8 is 200mm, and the diameter of each anchor hole 8 is 32mm plus or minus 0.5mm.
The method for testing by adopting the anchor rod or anchor cable corrosion resistance testing device comprises the following steps:
pulling the anchoring test frame 3 out of the test box 1, and driving anchor rods or anchor cables into the anchoring test frame 3 outside the test box 1;
secondly, a pulley 15 at the bottom of the anchoring test stand 3 after being driven with an anchor rod or an anchor rope is pushed upwards and backwards along a guide slope 35 to be placed on a guide rail 14, the anchoring test stand 3 is pushed backwards, the pulley 15 moves backwards along the guide rail 14, and the anchoring test stand 3 is pushed into the test box 1;
thirdly, three corrosive liquid injection pipes extend into the test box 1 through the corrosive liquid injection holes 2, gaps between the three corrosive liquid injection pipes and the corrosive liquid injection holes 2 are sealed, the outlet end of each corrosive liquid injection pipe extends to the outer side of an anchor rod or an anchor cable below the anchoring test panel 5, and the three corrosive liquid injection pipes are fixed in place and then the insulating heat insulation door 12 is closed;
fourthly, an operation panel at the top of the operation console 4 is controlled, the electric heating tube 7 is started to heat the inside of the test box 1, the temperature sensor 16 and the humidity sensor 31 monitor the temperature and the humidity in the test box 1 respectively in real time, when the temperature in the test box 1 is higher than a set temperature, the set temperature is the temperature in a coal mine tunnel, the temperature sensor 16 sends a signal to the operation console 4, and the operation console 4 adjusts the heating power of the electric heating tube 7 to keep the temperature in the test box 1 stable; when the humidity in the test box 1 is lower than the set humidity, the set humidity is the humidity in the coal mine tunnel, the humidity sensor 31 sends a signal to the operation console 4, the operation console 4 sends a command signal to the humidity adjusting sprayer 6, and the humidity adjusting sprayer 6 sprays water mist into the test box 1 to adjust the humidity; simultaneously, the outside of the test box 1 is injected with corrosive liquid to the surface of the anchor rod or the anchor cable through three corrosive liquid injection pipes, and the corrosive liquid injected through the three corrosive liquid injection pipes is acid liquid, neutral liquid and alkaline liquid respectively;
fifthly, observing corrosion conditions of the anchor rods or the anchor cables through the transparent glass window 30 at intervals, and injecting the corrosion liquid again;
and (six) after 30 days, 60 days or 90 days of test, operating the operation panel at the top of the operation console 4, closing the electric heating tube 7, opening the insulating door 12, pulling the anchoring test frame 3 out of the test box 1, respectively carrying out pull tests on three anchor rods or anchor ropes by using an anchor rod pull meter, and detecting the corrosion of the three anchor rods or anchor ropes in acidic, neutral and alkaline environments by the pull tests, wherein the final result is that the corrosion to the anchor rods in the acidic environment is strongest, the second in the alkaline environment and the corrosion in the neutral environment is weakest.
The specific process of the first step is as follows: firstly, a prepared similar material is filled in an anchoring material filling cavity with an opening at the top, which is formed by surrounding a bottom plate 13, a front plate 17, a rear plate 18, a left side plate 32 and a right side plate 21, wherein the similar material is formed by laying rocks in a coal mine tunnel in a layered manner, compacting the similar material in the anchoring material filling cavity, using an anchor rod or anchor rope machine to downwards drive the anchor rod or anchor rope into the similar material on an anchoring test panel 5 through an anchoring hole 8, anchoring the anchoring material between the upper end of the anchor rod or anchor rope and the upper surface of the anchoring test panel 5, and simulating the anchoring process of the anchor rod or anchor rope support in the coal mine tunnel.
The present embodiment is not limited in any way by the shape, material, structure, etc. of the present invention, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention are all included in the scope of protection of the technical solution of the present invention.
Claims (3)
1. Stock or anchor rope corrosion resistance test device, its characterized in that: the device comprises a test box (1) and an anchoring test frame (3) arranged in the test box (1), wherein an anchor rod or an anchor cable is anchored in the anchoring test frame (3);
the front side of the test box (1) is provided with an insulating door (12) for entering and exiting an anchoring test frame (3), the upper part of the insulating door (12) is provided with a transparent glass window (30), the box body of the test box (1) and the insulating door (12) are made of insulating materials, the rear side part and the bottom part in the test box (1) are both provided with an electric heating tube (7) with a U-shaped structure, the top part in the test box (1) is provided with a humidity adjusting sprayer (6), the right side in the test box (1) is provided with a corrosive liquid injection hole (2), the left side in the test box (1) is provided with a temperature sensor (16) and a humidity sensor (31), the right side of the test box (1) is provided with an operation console (4), the top of the operation console (4) is provided with an operation panel, and the inside of the operation console (4) is respectively connected with the electric heating tube (7), the humidity adjusting sprayer (6), the temperature sensor (16) and the humidity sensor (31) through control cables;
the anchoring test frame (3) comprises an anchoring test panel (5), a bottom plate (13), a front plate (17), a rear plate (18), a left side plate (32), a right side plate (21) and four full-thread high-strength studs (11), wherein the anchoring test panel (5) and the bottom plate (13) are horizontally arranged, the front plate (17), the rear plate (18), the left side plate (32) and the right side plate (21) are vertically arranged, the edges of the lower sides of the front plate (17) and the rear plate (18) are fixedly connected to the front side and the rear side of the upper surface of the bottom plate (13), the front side surface of the front plate (17) and the rear side surface of the rear plate (18) are fixedly provided with reinforcing frames (33), the left side plate (32) and the right side plate (21) are fixedly connected to the two reinforcing frames (33) on the left side and the two reinforcing frames (33) on the right side respectively through bolt assemblies (19), and the bottom plate (13), the front plate (17), the rear plate (18), the left side plate (32) and the right side plate (21) are enclosed to form an anchoring material filling cavity with an open top; the four full-thread high-strength studs (11) are correspondingly penetrated through the reinforcing frame (33) and are in jacking connection with the top of the reinforcing frame (33) through fastening nuts (34), mounting holes corresponding to the four full-thread high-strength studs (11) are formed in four corners on the anchoring test panel (5), and positioning nuts (9) and gaskets (10) which are in pressure fit with the upper surface and the lower surface of the anchoring test panel (5) respectively are connected to the four full-thread high-strength studs (11) in a threaded manner; a plurality of anchoring holes (8) for vertically penetrating the anchor rods or the anchor ropes are formed in the anchoring test panel (5);
the bottom of the bottom plate (13) is provided with a pulley (15), and the bottom in the test box (1) is provided with a guide rail (14) used for guiding and supporting the pulley (15) to roll forwards and backwards along the front-back direction;
the anchoring holes (8) are arranged in a front row and a rear row on the anchoring test panel (5); four anchor holes (8) are arranged in the front row, the distance between two adjacent anchor holes (8) is 200mm, and the diameter of each anchor hole (8) is 50mm plus or minus 0.5mm; five anchor holes (8) are arranged at the rear row, the distance between two adjacent anchor holes (8) is 200mm, and the diameter of each anchor hole (8) is 32mm plus or minus 0.5mm;
the lower part of the front side of the test box (1) is provided with a guide slope (35) which is arranged in a front low and rear high inclined way below the insulating and heat-insulating door (12), and the rear side edge of the guide slope (35) is flush with the bottom surface of the test box (1).
2. A method of testing with the rock bolt or cable corrosion resistance test apparatus of claim 1, wherein: the method comprises the following steps:
firstly, pulling the anchoring test frame (3) out of the test box (1), and driving anchor rods or anchor ropes into the anchoring test frame (3) outside the test box (1);
secondly, a pulley (15) at the bottom of the anchoring test frame (3) after the anchor rod or the anchor cable is driven into is pushed upwards and backwards along a guide slope (35) to be placed on a guide rail (14), the anchoring test frame (3) is pushed backwards, the pulley (15) moves backwards along the guide rail (14), and the anchoring test frame (3) is pushed into a test box (1);
thirdly, three corrosive liquid injection pipes extend into the test box (1) through the corrosive liquid injection holes (2), gaps between the three corrosive liquid injection pipes and the corrosive liquid injection holes (2) are sealed, the outlet end of each corrosive liquid injection pipe extends to the outer side of an anchor rod or an anchor cable below the anchoring test panel (5), and the three corrosive liquid injection pipes are fixed in place and then the insulating heat insulation door (12) is closed;
fourthly, an operation panel at the top of the operation console (4) is controlled, the electric heating tube (7) is started to heat the inside of the test box (1), the temperature sensor (16) and the humidity sensor (31) monitor the temperature and the humidity in the test box (1) respectively in real time, when the temperature in the test box (1) is higher than a set temperature, the set temperature is the temperature in a coal mine tunnel, the temperature sensor (16) sends a signal to the operation console (4), and the operation console (4) adjusts the heating power of the electric heating tube (7) to keep the temperature in the test box (1) stable; when the humidity in the test box (1) is lower than the set humidity, the set humidity is the humidity in a coal mine roadway, a humidity sensor (31) sends a signal to an operation console (4), the operation console (4) sends a command signal to a humidity adjusting sprayer (6), and the humidity adjusting sprayer (6) sprays water mist into the test box (1) to adjust the humidity; simultaneously, the outside of the test box (1) is injected with corrosive liquid to the surface of the anchor rod or the anchor cable through three corrosive liquid injection pipes, and the corrosive liquid injected through the three corrosive liquid injection pipes is acid liquid, neutral liquid and alkaline liquid respectively;
fifthly, observing corrosion conditions of the anchor rods or the anchor cables through the transparent glass window (30) at intervals, and injecting the corrosive liquid again;
and (six) after 30 days, 60 days or 90 days of test, operating the operating panel at the top of the operating console (4), closing the electric heating tube (7), opening the insulating and heat insulating door (12), pulling the anchoring test frame (3) out of the test box (1), respectively carrying out a pulling test on three anchor rods or anchor cables by using an anchor rod pulling meter, and detecting the corrosion of the three anchor rods or anchor cables in acidic, neutral and alkaline environments by the pulling test.
3. The assay method of claim 2, wherein: the specific process of the step (one) is as follows: firstly, a bottom plate (13), a front plate (17), a rear plate (18), a left side plate (32) and a right side plate (21) are surrounded to form an anchoring material filling cavity with an open top, prepared similar materials are filled in the anchoring material filling cavity, the similar materials are paved in a layered mode for rocks in a coal mine tunnel, the similar materials in the anchoring material filling cavity are compacted, an anchor rod or an anchor rope machine is used for driving the anchor rod or the anchor rope into the similar materials downwards on an anchoring test panel (5) through an anchoring hole (8), anchoring is carried out between the upper end of the anchor rod or the anchor rope and the upper surface of the anchoring test panel (5), and an anchoring process of anchor rod or anchor rope support in the coal mine tunnel is simulated.
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