CN113218774A - Mining microcapsule stopping agent compressive strength test system and test method - Google Patents
Mining microcapsule stopping agent compressive strength test system and test method Download PDFInfo
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- CN113218774A CN113218774A CN202110405064.XA CN202110405064A CN113218774A CN 113218774 A CN113218774 A CN 113218774A CN 202110405064 A CN202110405064 A CN 202110405064A CN 113218774 A CN113218774 A CN 113218774A
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention discloses a test system and a test method for compressive strength of a microcapsule stopping agent for mines.A pressure control part of the test system comprises a hydraulic pump station and a main loading hydraulic cylinder, and the main loading hydraulic cylinder is fixedly arranged on a test platform; the testing part comprises an auxiliary loading hydraulic cylinder and a pressure container, a piston II of the auxiliary loading hydraulic cylinder and a piston I of the main loading hydraulic cylinder are connected into an integral structure through a piston rod, a carrier liquid injection port is formed in the large cavity end of the auxiliary loading hydraulic cylinder, the pressure container is communicated and connected with the large cavity end of the auxiliary loading hydraulic cylinder, and a microcapsule stopping agent injection port and a mixed liquid discharge port are formed in the pressure container; the detection part comprises a liquid chromatograph connected with the mixed liquid discharge port through a sample introduction pipeline. The invention can accurately measure the compressive strength of the microcapsule stopping agent on the premise of accurately reducing the real compression condition of the microcapsule stopping agent in the high-pressure pipeline conveying process, and can provide theoretical basis and data support for determining proper pipeline injection pressure.
Description
Technical Field
The invention relates to a compressive strength test system and a test method, in particular to a test system and a test method suitable for a compressive strength test of a mining microcapsule stopping agent, and belongs to the technical field of mining fire extinguishing stopping.
Background
In the coal mining process, coal spontaneous combustion is one of the main natural disasters threatening the safety mining of coal. The spontaneous combustion of coal not only damages and wastes coal resources, but also produces toxic and harmful gas which seriously threatens the physical and psychological health of people, even causes serious and serious vicious accidents such as gas, coal dust explosion and the like under certain conditions, and seriously threatens the safety production of mines.
In the prior art, flame-retardant slurry, inert gas, flame-retardant foam or flame-retardant stopping agent is generally injected into a mine coal spontaneous combustion area to prevent coal spontaneous combustion, wherein the injection of the microcapsule stopping agent into the mine coal spontaneous combustion area is an efficient coal spontaneous combustion prevention technology developed in recent years. The microcapsule stopping agent generally comprises a wall material and a stopping core material wrapped in the wall material, when coal self-heats to the melting point of the wall material, the wall material melts and breaks to release the stopping core material, the stopping core material can react with active groups in the coal to inhibit the generation of lipoxy radicals or lipoxy radicals, so that the oxidation reaction of the coal is interrupted, the spontaneous combustion process of the coal is effectively prevented, and the flame-retardant stopping agent can timely play a stopping role at a specified temperature.
When the fire prevention and extinguishing measures are implemented, because the spontaneous combustion area of the mine coal is mostly located in dangerous closed zones such as mine goaf and the like, the fire prevention and extinguishing materials such as microcapsule stopping agents and the like are generally injected into the spontaneous combustion area of the mine coal by adopting a high-pressure pipeline. However, the wall material of the microcapsule stopping agent is soft, so that the microcapsule stopping agent is very easy to be broken by pressure during conveying in a high-pressure conveying pipeline, and further the stopping core material is lost, so that the expected stopping effect cannot be achieved. At present, an effective and feasible method for accurately measuring the compressive strength of the microcapsule stopping agent is not available, but the conventional uniaxial compressive strength test system and triaxial compressive strength test system aiming at a rock sample or a coal sample cannot accurately reduce the real compressive condition of the microcapsule stopping agent in the high-pressure pipeline conveying process, the particles of the microcapsule stopping agent are small, and the compressive rupture condition of the microcapsule stopping agent is difficult to observe in the test process.
Disclosure of Invention
Aiming at the problems, the invention provides a test system and a test method for compressive strength of a microcapsule stopping agent for mining, which can accurately measure the compressive strength of the microcapsule stopping agent on the premise of accurately reducing the real compression condition of the microcapsule stopping agent in the conveying process of a high-pressure pipeline, and further can provide theoretical basis and data support for determining proper pipeline injection pressure for achieving the expected stopping effect.
In order to achieve the aim, the mining microcapsule stopping agent compressive strength test system comprises a pressure control part, a test part, a detection part and a centralized electric control part;
the pressure control part comprises a hydraulic pump station and a main loading hydraulic cylinder; the hydraulic pump station is provided with a pressure gauge and is connected with the main loading hydraulic cylinder through a pump pressure output pipeline and an oil return pipeline; the cylinder body end of the main loading hydraulic cylinder is fixedly arranged on the test platform through a support frame, and a piston rod of the main loading hydraulic cylinder vertically extends downwards;
the testing part comprises an auxiliary loading hydraulic cylinder and a pressure container; the auxiliary loading hydraulic cylinder is of a barrel-shaped structure with an open top end, the bottom end of the auxiliary loading hydraulic cylinder is fixedly mounted on the test platform, the auxiliary loading hydraulic cylinder and the main loading hydraulic cylinder are coaxially arranged, a piston II of the auxiliary loading hydraulic cylinder and a piston I of the main loading hydraulic cylinder are connected into an integral structure through a piston rod of the main loading hydraulic cylinder, and a carrier liquid injection port is arranged at the large cavity end of the auxiliary loading hydraulic cylinder; the pressure container with a closed cavity is communicated and connected with the large cavity end of the auxiliary loading hydraulic cylinder through a carrier liquid communication pipeline, a one-way valve capable of preventing carrier liquid from flowing back to the auxiliary loading hydraulic cylinder is arranged on the carrier liquid communication pipeline, and a microcapsule stopping agent injection port and a mixed liquid discharge port are arranged on the pressure container;
the detection part comprises a liquid chromatograph, and the liquid chromatograph is connected with the mixed liquid discharge port through a sample introduction pipeline;
the centralized electric control part comprises a central controller, a loading control loop, a detection control loop and a data acquisition record output loop, wherein the central controller is respectively and electrically connected with the hydraulic pump station, the pressure gauge and the liquid chromatograph.
As a further improvement scheme of the invention, the detection part also comprises an ultrasonic cleaning instrument, and the ultrasonic cleaning instrument electrically connected with the central controller is communicated with the sample inlet pipeline.
As a further improvement scheme of the invention, the carrier liquid communication pipeline and the sample injection pipeline are both of flexible high-pressure rubber pipe structures, the pressure container is also provided with a uniform mixing control mechanism which can control the whole movement of the pressure container, and the uniform mixing control mechanism comprises a uniform mixing driving control part which is electrically connected with the central controller.
As a further improvement of the invention, the piston II is provided with an exhaust hole provided with an exhaust valve.
As a further improvement scheme of the invention, the mixed liquid outlet is connected with the sample injection pipeline through a flow control valve.
As a further improvement scheme of the invention, an electric control valve electrically connected with the central controller is arranged on the mixed liquid discharge port.
A mining microcapsule stopping agent compressive strength test method specifically comprises the following steps:
a. preparation of the test: opening a microcapsule stopping agent injection port, closing a mixed liquid discharge port, injecting the microcapsule stopping agent into the pressure container through the microcapsule stopping agent injection port according to the set dosage, injecting carrier liquid into the auxiliary loading hydraulic cylinder through the carrier liquid inlet, stopping injecting the carrier liquid after the large cavity of the auxiliary loading hydraulic cylinder and the pressure container are emptied, and closing the carrier liquid inlet and the microcapsule stopping agent injection port;
b. and (3) loading test: the central controller controls the hydraulic pump station to pump pressure to the main loading hydraulic cylinder, the main loading hydraulic cylinder outputs set test pressure through the feedback of the pressure gauge, and the piston rod drives the piston II to press down to enable the carrier hydraulic pressure in the large cavity of the auxiliary loading hydraulic cylinder to be increased strongly until the test pressure fed back by the pressure gauge is stable and reaches a set test pressure value;
c. detection and data output: opening a mixed liquid discharge port for a set time and then closing the mixed liquid discharge port, setting the measured mixed liquid to enter a liquid chromatograph for detection through a sample introduction pipeline under the action of pressure, if the microcapsule stopping agent core material is not detected in the carrier liquid, the set test pressure does not reach the compressive strength limit of the microcapsule stopping agent, controlling a hydraulic pump station by a central controller to increase the set test pressure and then continuing a loading test until the microcapsule stopping agent core material is detected in the carrier liquid by the liquid chromatograph, completing the test, and storing and outputting data by the central controller.
As a further improvement of the present invention, in step c, after the test is completed, the central controller calculates the formula
And calculating the compressive strength of the microcapsule stopping agent, storing and outputting the compressive strength, wherein sigma is the compressive strength of the microcapsule stopping agent, F is a pressure value fed back by a pressure gauge, and S is the area of the lower surface of the piston II.
As a further improvement of the present invention, in step c, the measured mixed solution is set to be subjected to ultrasonic cleaning by an ultrasonic cleaning instrument under the action of pressure, and then the mixed solution enters a liquid chromatograph for detection.
As a further improvement of the invention, in the step b, the central controller controls the homogeneous mixing drive control component to move the pressure vessel as a whole.
Compared with the prior art, the mining microcapsule stopping agent compressive strength test system utilizes the pressure effect of the ballasted body fluid to truly reduce the compression condition of the microcapsule stopping agent in the high-pressure pipeline conveying process, further realizes the in-situ test of the microcapsule stopping agent compressive strength, can realize that the same batch of microcapsule stopping agent with the same granularity performs the compressive strength test according to different set doses to obtain the test data of the injection pressure of the microcapsule stopping agent under the condition of different dosage, further can obtain the relationship between the dosage and the injection pressure of the same batch of microcapsule stopping agent with the same granularity, can also obtain the relationship between the microcapsule stopping agent with different granularities and the injection pressure, can overcome the defects and the defects of the conventional single-axis compressive test system and the triaxial compressive test system, and can accurately measure the compressive strength of the microcapsule stopping agent, the method has simple and convenient operation process, can quickly realize multiple times of measurement, and can provide theoretical basis and data support for determining proper pipeline injection pressure for achieving the expected inhibition effect.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the device comprises a main loading hydraulic cylinder, 2, pistons I, 3, piston rods, 4, a support frame, 5, pistons II, 6, an auxiliary loading hydraulic cylinder, 7, a carrier liquid injection port, 8, a pressure gauge, 9, a hydraulic pump station, 10, a carrier liquid communication pipeline, 11, a one-way valve, 12, a microcapsule stopping agent injection port, 13, a pressure container, 14, a uniform mixing control mechanism, 15, a mixed liquid discharge port, 16, an ultrasonic cleaning instrument, 17, a sample injection pipeline, 18, a liquid chromatograph, 19 and a central controller.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The mining microcapsule stopping agent compressive strength test system comprises a pressure control part, a test part, a detection part and a centralized electric control part.
As shown in fig. 1, the pressure control part comprises a hydraulic pump station 9 and a main loading hydraulic cylinder 1; a pressure gauge 8 is arranged on the hydraulic pump station 9, and the hydraulic pump station 9 is connected with the main loading hydraulic cylinder 1 through a pump pressure output pipeline and an oil return pipeline; the cylinder body end of the main loading hydraulic cylinder 1 is fixedly arranged on the test platform through a support frame 4, and a piston rod 3 of the main loading hydraulic cylinder 1 vertically extends downwards.
The testing part comprises a secondary loading hydraulic cylinder 6 and a pressure container 13; the auxiliary loading hydraulic cylinder 6 is of a barrel-shaped structure with an open top end, the bottom end of the auxiliary loading hydraulic cylinder 6 is fixedly mounted on the test platform, the auxiliary loading hydraulic cylinder 6 and the main loading hydraulic cylinder 1 are coaxially arranged, a piston II 5 of the auxiliary loading hydraulic cylinder 6 and a piston I2 of the main loading hydraulic cylinder 1 are connected into an integral structure through a piston rod 3 of the main loading hydraulic cylinder 1, a carrier liquid injection port 7 is formed in the large cavity end of the auxiliary loading hydraulic cylinder 6, and the carrier liquid injection port 7 can be arranged on the piston II 5 under the condition that the size of the carrier liquid injection port 7 is far smaller than the area of the lower surface of the piston II 5; the pressure container 13 with a closed cavity is communicated and connected with the large cavity end of the auxiliary loading hydraulic cylinder 6 through a carrier liquid communication pipeline 10, a one-way valve 11 capable of preventing carrier liquid from flowing back to the auxiliary loading hydraulic cylinder 6 is arranged on the carrier liquid communication pipeline 10, and a microcapsule stopping agent injection port 12 and a mixed liquid discharge port 15 are arranged on the pressure container 13.
The detection part comprises a liquid chromatograph 18, and the liquid chromatograph 18 is connected with the mixed liquid discharge port 15 through a sample injection pipeline 17.
The centralized electric control part comprises a central controller 19, a loading control loop, a detection control loop and a data acquisition, recording and output loop, wherein the central controller 19 is respectively and electrically connected with the hydraulic pump station 9, the pressure gauge 8 and the liquid chromatograph 18.
When the mining microcapsule stopping agent compressive strength test system is used for testing the compressive strength of the mining microcapsule stopping agent, firstly, opening a microcapsule stopping agent injection port 12 and closing a mixed liquid discharge port 15, injecting the same batch of microcapsule stopping agent with the same granularity into a pressure container 13 through the microcapsule stopping agent injection port 12 according to the set dosage, carrier fluid is injected into the auxiliary loading hydraulic cylinder 6 through the carrier fluid inlet 7, after the large cavity of the auxiliary loading hydraulic cylinder 6 and the pressure container 13 are emptied, stopping injecting the carrier liquid, closing the carrier liquid inlet 7 and the microcapsule stopping agent injection port 12, forming a communicated closed space by the large cavity of the secondary loading hydraulic cylinder 6 and the pressure container 13, and fully mixing the carrier liquid entering the pressure container 13 through the one-way valve 11 and the microcapsule stopping agent with set dosage to form a mixed liquid, namely carrying out a loading test; the central controller 19 controls the hydraulic pump station 9 to pump pressure to the main loading hydraulic cylinder 1, and the main loading hydraulic cylinder 1 outputs set test pressure through the feedback of the pressure gauge 8, the piston rod 3 drives the piston II 5 to press down to increase the carrier hydraulic pressure in the large cavity of the auxiliary loading hydraulic cylinder 6, according to the Pascal principle, the pressure acting on the carrier fluid in the large cavity of the auxiliary loading hydraulic cylinder 6 is transmitted to each position in the pressure container 13 through the carrier fluid communication pipeline 10 in an equivalent manner, namely, the pressure exerted by the carrier fluid on the microcapsule stopping agent is equal to the carrier fluid pressure in the large cavity of the auxiliary loading hydraulic cylinder 6, so that the situation that the microcapsule stopping agent is in real pipeline pressure bearing is simulated, and the detection can be carried out after the test pressure fed back by the pressure gauge 8 is stable; opening a mixed liquid discharge port 15 for a set time, closing the mixed liquid discharge port, allowing the set metered mixed liquid to enter a liquid chromatograph 18 for detection through a sample introduction pipeline 17 under the action of pressure, if a microcapsule stopping agent core material is not detected in carrier liquid, indicating that a wall material of the microcapsule stopping agent is not broken, namely the set test pressure does not reach the compressive strength limit of the microcapsule stopping agent, controlling a hydraulic pump station 9 by a central controller 19 to improve the set test pressure, and continuing a loading test until the microcapsule stopping agent core material is detected in the carrier liquid by the liquid chromatograph 18, wherein the pressure strength of the mixed liquid is the compressive strength of the microcapsule stopping agent with the set dose in the batch, and the calculation formula is as follows:
wherein, sigma is the compression strength of the microcapsule stopping agent, F is the pressure value fed back by the pressure gauge 8, S is the lower surface area of the piston II 5, and the central controller 19 calculates the compression strength of the microcapsule stopping agent with the set dose of the batch and then stores and outputs the compression strength.
In order to avoid the influence of impurities in the mixture on the test data, as a further improvement of the invention, the detection part further comprises an ultrasonic cleaning instrument 16, and the ultrasonic cleaning instrument 16 electrically connected with the central controller 19 is communicated and arranged on the sample feeding pipeline 17. The mixed liquid set for metering is subjected to ultrasonic cleaning by an ultrasonic cleaning instrument 16 under the action of pressure, and then enters a liquid phase chromatograph 18 for detection.
In order to avoid the precipitation phenomenon of the microcapsule stopping agent in the pressure container 13 during the loading test process and further cause the non-homogeneous phenomenon of the mixed liquid, thereby affecting the accuracy of the detection data, as a further improvement scheme of the invention, the carrier liquid communicating pipeline 10 and the sample injection pipeline 17 are both flexible high-pressure rubber pipe structures, the pressure container 13 is also provided with a uniform mixing control mechanism 14 capable of controlling the whole motion of the pressure container 13, the uniform mixing control mechanism 14 comprises a uniform mixing driving control part electrically connected with a central controller 19, the uniform mixing driving control part is electrically connected with the central controller 19, the uniform mixing control mechanism 14 can be a crank arm rocker structure which is driven by a motor and can make the whole pressure container 13 swing back and forth along a hinge point, or can be a linear motion structure which is driven by a telescopic cylinder and can make the whole pressure container 13 move back and forth, or a vibration disc structure and other structures which are driven by a motor and can enable the pressure container 13 to vibrate integrally at low frequency or high frequency, and in the loading test process, the central controller 19 can control the pressure container 13 to move integrally by controlling the uniform mixing drive control component so as to ensure the uniformity of the mixed liquid.
In order to facilitate the exhaust of the auxiliary loading hydraulic cylinder 6, as a further improvement scheme of the invention, an exhaust hole provided with an exhaust valve is arranged on the piston II 5, the exhaust valve is opened during the exhaust, and the exhaust valve is closed after the exhaust is completed.
In order to realize accurate control of the dosage of the mixed liquid entering the liquid chromatograph 18, as a further improvement of the present invention, the mixed liquid discharge port 15 is connected to the sample injection line 17 through a flow control valve.
In order to realize automation of the test process, as a further improvement scheme of the invention, an electric control valve electrically connected with the central controller 19 is arranged on the mixed liquid discharge port 15, and the central controller 19 can realize automatic control on opening and closing of the mixed liquid discharge port 15 in the test process.
The carrier liquid can be ordinary hydraulic oil or anti-wear hydraulic oil, and in order to improve the accuracy of the compressive strength test, the preferred scheme of the invention is that the carrier liquid is HM high-pressure anti-wear hydraulic oil.
The mining microcapsule stopping agent compressive strength test system utilizes the pressure effect of the ballasted body fluid to truly reduce the compression condition of the microcapsule stopping agent in the high-pressure pipeline conveying process, further realizes the in-situ test of the compressive strength of the microcapsule stopping agent, can realize that the same batch of microcapsule stopping agent with the same granularity performs the compressive strength test according to different set doses to obtain the test data of the injection pressure of the microcapsule stopping agent under the condition of different dosing doses, further can obtain the relation between the dosing dose and the injection pressure of the same batch of microcapsule stopping agent with the same granularity, can also obtain the relation between the microcapsule stopping agents with different granularities and the injection pressure, can overcome the defects and the shortages of the conventional single-axis compressive test system and the triaxial compressive test system, and can accurately determine the compressive strength of the microcapsule stopping agent, the method has simple and convenient operation process, can quickly realize multiple times of measurement, and can provide theoretical basis and data support for determining proper pipeline injection pressure for achieving the expected inhibition effect.
Claims (10)
1. A mining microcapsule stopping agent compressive strength test system is characterized by comprising a pressure control part, a test part, a detection part and a centralized electric control part;
the pressure control part comprises a hydraulic pump station (9) and a main loading hydraulic cylinder (1); a pressure gauge (8) is arranged on the hydraulic pump station (9), and the hydraulic pump station (9) is connected with the main loading hydraulic cylinder (1) through a pump pressure output pipeline and an oil return pipeline; the cylinder body end of the main loading hydraulic cylinder (1) is fixedly arranged on the test platform through a support frame, and a piston rod (3) of the main loading hydraulic cylinder (1) vertically extends downwards;
the testing part comprises a secondary loading hydraulic cylinder (6) and a pressure container (13); the auxiliary loading hydraulic cylinder (6) is of a barrel-shaped structure with an open top end, the bottom end of the auxiliary loading hydraulic cylinder (6) is fixedly installed on the test platform, the auxiliary loading hydraulic cylinder (6) and the main loading hydraulic cylinder (1) are coaxially arranged, a piston II (5) of the auxiliary loading hydraulic cylinder (6) and a piston I (2) of the main loading hydraulic cylinder (1) are connected into an integral structure through a piston rod (3) of the main loading hydraulic cylinder (1), and a carrier liquid injection port (7) is formed in the large cavity end of the auxiliary loading hydraulic cylinder (6); a pressure container (13) with a closed cavity is communicated and connected with the large cavity end of the auxiliary loading hydraulic cylinder (6) through a carrier fluid communication pipeline (10), a one-way valve (11) capable of preventing carrier fluid from flowing back to the auxiliary loading hydraulic cylinder (6) is arranged on the carrier fluid communication pipeline (10), and a microcapsule stopping agent injection port (12) and a mixed liquid discharge port (15) are arranged on the pressure container (13);
the detection part comprises a liquid chromatograph (18), and the liquid chromatograph (18) is connected with the mixed liquid discharge port (15) through a sample introduction pipeline (17);
the centralized electric control part comprises a central controller (19), a loading control loop, a detection control loop and a data acquisition record output loop, wherein the central controller (19) is electrically connected with the hydraulic pump station (9), the pressure gauge (8) and the liquid chromatograph (18) respectively.
2. The mining microcapsule stopping agent compressive strength testing system according to claim 1, wherein the detection part further comprises an ultrasonic cleaning instrument (16), and the ultrasonic cleaning instrument (16) electrically connected with the central controller (19) is communicated with and arranged on the sample feeding pipeline (17).
3. The mining microcapsule stopping agent compressive strength testing system according to claim 1, wherein the carrier liquid communicating pipeline (10) and the sample injection pipeline (17) are both flexible high-pressure rubber pipe structures, the pressure container (13) is further provided with a uniform mixing control mechanism (14) capable of controlling the overall movement of the pressure container (13), and the uniform mixing control mechanism (14) comprises a uniform mixing driving control part electrically connected with the central controller (19).
4. The mining microcapsule stopping agent compressive strength testing system according to claim 1, 2 or 3, wherein the piston II (5) is provided with an exhaust hole provided with an exhaust valve.
5. The mining microcapsule stopping agent compressive strength testing system according to claim 1, 2 or 3, wherein the mixed liquid discharge port (15) is connected with the sample injection pipeline (17) through a flow control valve.
6. The mining microcapsule stopping agent compressive strength testing system according to claim 1, 2 or 3, wherein an electrically controlled valve electrically connected with the central controller (19) is arranged on the mixed liquid discharge port (15).
7. The mining microcapsule stopping agent compressive strength test method is characterized by comprising the following steps:
a. preparation of the test: opening a microcapsule stopping agent injection port (12), closing a mixed liquid discharge port (15), injecting the microcapsule stopping agent into a pressure container (13) through the microcapsule stopping agent injection port (12) according to a set dose, then injecting carrier liquid into the secondary loading hydraulic cylinder (6) through a carrier liquid inlet (7), stopping injecting the carrier liquid after a large cavity of the secondary loading hydraulic cylinder (6) and the pressure container (13) are emptied, and closing the carrier liquid inlet (7) and the microcapsule stopping agent injection port (12);
b. and (3) loading test: the central controller (19) controls a hydraulic pump station (9) to pump pressure to the main loading hydraulic cylinder (1), the main loading hydraulic cylinder (1) outputs set test pressure through feedback of the pressure gauge (8), and the piston rod (3) drives the piston II (5) to press downwards to enable carrier hydraulic pressure in the large cavity of the auxiliary loading hydraulic cylinder (6) to be increased strongly until the test pressure fed back by the pressure gauge (8) is stable and reaches a set test pressure value;
c. detection and data output: opening a mixed liquid discharge port (15) for a set time and then closing the mixed liquid discharge port, setting the measured mixed liquid to enter a liquid chromatograph (18) for detection through a sample introduction pipeline (17) under the action of pressure, if the microcapsule stopping agent core material is not detected in the carrier liquid, the set test pressure does not reach the compressive strength limit of the microcapsule stopping agent, controlling a hydraulic pump station (9) by a central controller (19) to increase the set test pressure and then continue a loading test until the microcapsule stopping agent core material is detected in the carrier liquid by the liquid chromatograph (18), completing the test, and storing and outputting data by the central controller (19).
8. The mining microcapsule stopping agent compressive strength testing method according to claim 7, wherein in the step c, after the test is completed, the central controller (19) calculates the formula
And calculating the compressive strength of the microcapsule stopping agent, storing and outputting the compressive strength, wherein sigma is the compressive strength of the microcapsule stopping agent, F is a pressure value fed back by a pressure gauge (8), and S is the lower surface area of the piston II (5).
9. The mining microcapsule stopping agent compressive strength test method according to claim 7, wherein the detection part further comprises an ultrasonic cleaning instrument (16), and the ultrasonic cleaning instrument (16) electrically connected with the central controller (19) is communicated and arranged on the sample feeding pipeline (17);
in the step c, the set and metered mixed solution is subjected to ultrasonic cleaning by an ultrasonic cleaning instrument (16) under the action of pressure, and then enters a liquid chromatograph (18) for detection.
10. The mining microcapsule stopping agent compressive strength test method according to claim 7, wherein the carrier liquid communicating pipeline (10) and the sample injection pipeline (17) are both flexible high-pressure rubber pipe structures, the pressure container (13) is further provided with a uniform mixing control mechanism (14) capable of controlling the overall movement of the pressure container (13), and the uniform mixing control mechanism (14) comprises a uniform mixing driving control part electrically connected with the central controller (19);
in the step b, the central controller (19) drives the control part to make the pressure container (13) move integrally by controlling the uniform mixing.
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| CN114113454A (en) * | 2021-11-08 | 2022-03-01 | 太原工业学院 | Testing device and method for testing effect of stopping agent |
| CN114166644A (en) * | 2022-01-05 | 2022-03-11 | 中钢集团郑州金属制品研究院股份有限公司 | Viscous damper testing device and method |
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