Coal seam microcosmic failure process control measurement and seepage displacement simulation test device

Abstract

The invention relates to the technical field of coal bed gas reservoir development, and discloses a coal bed microcosmic failure process control measurement and seepage displacement simulation test device which comprises a supporting mechanism, the supporting mechanism comprises a supporting frame, supporting legs are fixedly connected to the outer wall of the bottom of the supporting frame, a first motor is fixedly connected to the outer surface of the supporting frame, and a second motor is fixedly connected to the outer surface of the first motor. The output end of the first motor is fixedly connected with a rotating frame, the top of the rotating frame is fixedly connected with a double-shaft motor, and when a microcosmic damage and seepage displacement simulation test is carried out on a coal briquette sample, a microcosmic damage experiment and seepage displacement simulation are carried out on the coal briquette through the adjusting mechanism and the auxiliary mechanism; when the action of gravity direction change needs to be analyzed, the first motor drives the rotating frame to drive the observation frame fixed with the first connecting frame to complete overturning, and the coal briquette sample is converted from a vertical posture to a horizontal posture, so that the result change of the seepage displacement simulation test in the gravity direction change process is observed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coalbed methane reservoir development, in particular to a coalbed micro-damage process control measurement and seepage displacement simulation test device. BACKGROUND

[0002] With the increasing demand for efficient development of coalbed methane and safety production of coal mines, accurate control and measurement of the micro-damage process of coalbed and simulation test of seepage displacement behavior are particularly important. Traditional methods are difficult to monitor the damage process in real time at the micro scale, and the simulation of seepage displacement lacks authenticity, resulting in insufficient prediction accuracy.

[0003] Patent application No. CN202011245211.3 discloses a core test device for simulating coalbed methane reservoir fracturing exploitation, comprising a plurality of core test assemblies; each core test assembly comprises a fixing box, a crack prevention box, a fracturing pipe, a communicating vessel and a pressure gauge, wherein the core to be tested is located in the fixing box, a part of the fracturing pipe is located in the fixing groove of the core to be tested, another part is located outside the fixing box and is in communication with the communicating vessel, and the communicating vessel is connected with the fracturing mechanism; the measuring end of the pressure gauge is located in the fixing box, and the reading end is located in the crack prevention box.

[0004] In summary, underground coal seams may be damaged due to high pressure, dynamic impact load and groundwater infiltration, and the seepage displacement caused by damage induced by different factors is different, therefore, experimental research needs to be carried out for various potential influencing factors to avoid structural analysis errors caused by single experiment.

[0005] Therefore, we propose a coalbed micro-damage process control measurement and seepage displacement simulation test device. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides a coalbed micro-damage process control measurement and seepage displacement simulation test device to solve the problems raised in the background art.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a coalbed micro-damage process control measurement and seepage displacement simulation test device, comprising a supporting mechanism, the supporting mechanism comprising a supporting frame, the bottom outer wall of the supporting frame being fixedly connected with a supporting leg, the outer surface of the supporting frame being fixedly connected with a first motor, the output end of the first motor being fixedly connected with a rotating frame, the top of the rotating frame being fixedly connected with a double-shaft motor, the outer wall of the side of the rotating frame away from the double-shaft motor being fixedly connected with a first connecting frame, the top of the first connecting frame being fixedly connected with an observation mechanism;

[0008] The observation mechanism comprises:

[0009] The observation frame is fixedly connected with the first connecting frame at the top, and the inner wall of the observation frame is fixedly connected with the high-pressure-resistant glass.

[0010] The observation frame is fixedly connected with the first connecting frame at the top, and the inner wall of the observation frame is fixedly connected with the high-pressure-resistant glass.

[0011] According to the above technical scheme, the outer surface of the second adjusting frame is provided with a second motor, the output end of the second motor penetrates the second adjusting frame and is fixedly connected with a rotating wheel, and the rotating wheel is rollingly connected to the inner wall of the second sliding groove. The second motor rotates the second adjusting frame along the outer surface of the observation frame through the rotating wheel.

[0012] According to the above technical scheme, the inner wall of the second adjusting frame is fixedly connected with a micro camera, and the inner walls of the two sides of the second adjusting frame near the micro camera are both fixedly connected with auxiliary light sources. The auxiliary light sources are used to improve the light source during the observation process of the micro camera.

[0013] According to the above technical scheme, the bottom of the observation frame is provided with an auxiliary mechanism, the auxiliary mechanism includes a second telescopic rod, the second telescopic rod is fixedly connected to the inner wall of the bottom of the observation frame, the output end of the second telescopic rod is fixedly connected with a sealing frame, the outer wall of one side of the sealing frame near the second telescopic rod is fixedly connected with a third motor, the output end of the third motor is fixedly connected with a stress frame, the outer surface of one side of the stress frame near the sealing frame is provided with a third sliding groove, the outer wall of one side of the sealing frame near the third sliding groove is rotatably connected with a second auxiliary wheel through a rotating shaft, the second auxiliary wheel is rollingly connected to the inner wall of the third sliding groove, and the inner wall diameters of the sealing frame and the high-pressure-resistant glass are the same.

[0014] According to the above technical scheme, the outer surface of the stress frame is fixedly sleeved with a sealing strip, the outer wall of one side of the stress frame near the sealing frame is fixedly connected with a gas injection port, the outer surface of one side of the stress frame away from the gas injection port is provided with a gas outlet, and the outer surface of one side of the stress frame near the gas outlet is provided with a water outlet. The gas injection port injects high-pressure gas into the internal sealing area of the observation frame through the gas outlet.

[0015] According to the above technical scheme, the output end of the double-shaft motor is provided with an adjusting mechanism, the adjusting mechanism includes a first adjusting frame, the inner wall of the first adjusting frame is fixedly connected with the output end of the double-shaft motor, and the inner wall of one side of the first adjusting frame away from the double-shaft motor is fixedly connected with a limiting rod. The limiting rod is used to limit the deflection angle of the first adjusting frame.

[0016] According to the technical scheme, the inner wall of the side, away from the limiting rod, of the first adjusting frame is fixedly connected with a hydraulic rod, the output end of the hydraulic rod is fixedly connected with a second connecting frame, the outer wall of the side, away from the hydraulic rod, of the second connecting frame is fixedly connected with a sealing plate, a through hole is formed in the outer surface of the sealing plate, and the through hole is limited to be sleeved on the limiting pin.

[0017] According to the technical scheme, the inner wall of the side, close to the sealing plate, of the second connecting frame is fixedly connected with a first telescopic rod, the output end of the first telescopic rod penetrates through the sealing plate and is fixedly connected with a pressing plate, the first telescopic rod is used for pushing the pressing plate to be slidingly connected with the inner wall of the observation frame, and the pressing plate has the same diameter as the inner wall of the top of the observation frame.

[0018] According to the technical scheme, the inner wall of the sealing plate is fixedly connected with a liquid injection pipe, the bottom of the liquid injection pipe is fixedly connected with the pressing plate, and the liquid injection pipe is used for injecting fluorescent silicon dioxide nanoparticles into the experimental coal block.

[0019] According to the technical scheme, the outer surface of the supporting frame is provided with a first sliding groove, the outer wall of the side, close to the first sliding groove, of the rotating frame is rotationally connected with a first auxiliary wheel through a rotating shaft, and the first auxiliary wheel is rotationally connected with the inner wall of the first sliding groove, so that the first sliding groove is used for limiting the deflection angle of the rotating frame through the first auxiliary wheel.

[0020] Compared with the prior art, the coal seam micro damage process control measurement and seepage displacement simulation test device has the following beneficial effects:

[0021] 1、The coal seam micro damage process control measurement and seepage displacement simulation test device is used for micro damage experiment and seepage displacement simulation of the coal block through the adjusting mechanism and the auxiliary mechanism when the micro damage and seepage displacement simulation test of the coal block sample is performed, the observation frame fixed with the first connecting frame is driven to complete overturning by the first motor driving the rotating frame when the effect of the change of the gravity direction needs to be analyzed, the coal block sample is converted from the vertical posture to the horizontal posture, and the result change of the seepage displacement simulation test in the change of the gravity direction is observed.

[0022] 2、The coal seam micro damage process control measurement and seepage displacement simulation test device is used for micro damage experiment and seepage displacement simulation of the coal block through the adjusting mechanism and the auxiliary mechanism when the micro damage and seepage displacement simulation test of the coal block sample is performed, the observation frame fixed with the first connecting frame is driven to complete overturning by the first motor driving the rotating frame when the effect of the change of the gravity direction needs to be analyzed, the coal block sample is converted from the vertical posture to the horizontal posture, and the result change of the seepage displacement simulation test in the change of the gravity direction is observed.

[0023] 3、The micro-observation mechanism is arranged, when the micro-observation mechanism is used for carrying out micro-damage and seepage displacement simulation test on the coal sample, the second motor drives the second adjusting frame to rotate along the outer surface of the observation frame through the rotating wheel, the relative position between the micro-camera and the coal sample is changed, the observation of multiple positions of the coal sample is realized, and therefore the result accuracy of the micro-observation process of the coal sample damage is improved.

[0024] 4、The auxiliary mechanism is arranged, the gas injection port injects high-pressure gas into the sealed area inside the observation frame through the gas outlet, and the pressure detector is used for monitoring the high-pressure strength inside the high-pressure glass, so that the micro-damage process of the coal sample under different gas pressure environments is simulated and relevant measurement is carried out. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an overall front structure schematic diagram of the application;

[0026] Figure 2 It is an overall front structure schematic diagram of the application;

[0027] Figure 3 It is a support mechanism and adjusting mechanism structure schematic diagram of the application;

[0028] Figure 4 It is an adjusting mechanism structure schematic diagram of the application;

[0029] Figure 5 It is an adjusting mechanism and observation mechanism structure schematic diagram of the application; Figure 1

[0030] Figure 6 It is an adjusting mechanism and observation mechanism structure schematic diagram of the application; Figure 2

[0031] Figure 7 It is an observation mechanism structure schematic diagram of the application;

[0032] Figure 8 It is an auxiliary mechanism structure schematic diagram of the application;

[0033] Figure 9 It is an auxiliary mechanism structure schematic diagram of the application; Figure 2 It is an auxiliary mechanism structure schematic diagram of the application;

[0034] ​​In the figure: 1, support mechanism; 101, support frame; 102, support leg; 103, first motor; 104, first sliding groove; 105, rotating frame; 106, first auxiliary wheel; 107, first connecting frame; 108, double-shaft motor; 2, adjusting mechanism; 201, first adjusting frame; 202, hydraulic rod; 203, limiting rod; 204, second connecting frame; 205, sealing plate; 206, through hole; 207, first telescopic rod; 208, extrusion plate; 209, liquid injection pipe; 3, observation mechanism; 301, observation frame; 302, second sliding groove; 303, second adjusting frame; 304, second motor; 305, rotating wheel; 306, auxiliary light source; 307, micro camera; 308, pressure detector; 309, limiting pin; 310, high-pressure-resistant glass; 4, auxiliary mechanism; 401, second telescopic rod; 402, sealing frame; 403, second auxiliary wheel; 404, third motor; 405, force receiving frame; 406, third sliding groove; 407, sealing strip; 408, water outlet; 409, gas injection port; 410, gas outlet. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0036] Examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] Embodiment one: refer to Figures 1-4The application provides a technical scheme: a coal seam micro damage process control measurement and seepage displacement simulation test device, which comprises a supporting mechanism 1, the supporting mechanism 1 comprises a supporting frame 101, supporting legs 102 are fixedly connected to the bottom outer wall of the supporting frame 101, a first motor 103 is fixedly connected to the outer surface of the supporting frame 101, a rotating frame 105 is fixedly connected to the output end of the first motor 103, a double-shaft motor 108 is fixedly connected to the top of the rotating frame 105, a first connecting frame 107 is fixedly connected to the outer wall of one side of the rotating frame 105 away from the double-shaft motor 108, and an observation mechanism 3 is fixedly connected to the top of the first connecting frame 107.

[0039] The observation mechanism 3 comprises:

[0040] An observation frame 301 is fixedly connected to the bottom of the first connecting frame 107, a high-pressure-resistant glass 310 is fixedly connected to the inner wall of the observation frame 301, a second sliding groove 302 is formed in the outer surface of the observation frame 301, and a second adjusting frame 303 is slidingly connected to the outer surface of the observation frame 301.

[0041] A limiting pin 309 is fixedly connected to the top outer wall of the observation frame 301, and a pressure detector 308 is fixedly connected to the inner wall of one side of the observation frame 301 close to the limiting pin 309; before the coal block micro damage measurement and seepage displacement simulation test is carried out, a cylindrical coal block sample with a diameter suitable for the inner diameter of the observation frame 301 is placed into the observation frame 301; during the loading of the coal block sample, the second telescopic rod 401 is pre-slid to the top of the observation frame 301, so that the bottom of the coal block sample is assisted and supported, thereby avoiding rigid collision between the coal block sample and the second telescopic rod 401 when the coal block sample vertically falls, and preventing the coal block sample from being damaged due to excessive impact force; since the initial structural integrity of the coal block directly affects the accuracy of test data, the pre-adjusting support of the second telescopic rod 401 can effectively reduce the mechanical damage risk in the loading process, ensures that the coal block sample maintains the original physical properties before the experiment starts, and thus provides a reliable data basis for subsequent microstructure analysis and seepage simulation.

[0042] The output end of the double-shaft motor 108 is provided with an adjusting mechanism 2, the adjusting mechanism 2 comprises a first adjusting frame 201, the inner wall of the first adjusting frame 201 is fixedly connected with the output end of the double-shaft motor 108, the inner wall of one side of the first adjusting frame 201 away from the double-shaft motor 108 is fixedly connected with a limiting rod 203, the limiting rod 203 is used for limiting the deflection angle of the first adjusting frame 201, the inner wall of one side of the first adjusting frame 201 away from the limiting rod 203 is fixedly connected with a hydraulic rod 202, the output end of the hydraulic rod 202 is fixedly connected with a second connecting frame 204, the outer wall of one side of the second connecting frame 204 away from the hydraulic rod 202 is fixedly connected with a sealing plate 205, the outer surface of the sealing plate 205 is provided with a through hole 206, the through hole 206 is limited to be sleeved with the limiting pin 309, when the second telescopic rod 401 resets, the coal sample is sent into the inside of the observation frame 301, the double-shaft motor 108 drives the first adjusting frame 201 to overturn to the top of the observation frame 301, in this process, the second connecting frame 204 fixedly connected with the output end of the hydraulic rod 202 is butted with the top end of the observation frame 301, by sleeving the through hole 206 into the limiting pin 309, so that the inside of the observation frame 301 forms a high airtight test cavity, ensuring the stability of the simulated experimental environment, after the coal sample completes the simulation experiment such as seepage displacement, the hydraulic rod 202 reversely stretches the second connecting frame 204, drives the sealing plate 205 to separate from the top end of the observation frame 301, the double-shaft motor 108 drives the first adjusting frame 201 to rotate clockwise, realizes the complete separation of the sealing plate 205 and the observation frame 301, provides the operation space for the subsequent experimental process or the replacement of the coal sample.

[0043] The inner wall of one side of the second connecting frame 204 close to the sealing plate 205 is fixedly connected with a first telescopic rod 207, the output end of the first telescopic rod 207 penetrates the sealing plate 205 and is fixedly connected with a pressing plate 208, the first telescopic rod 207 is used for pushing the pressing plate 208 to be slidingly connected with the inner wall of the observation frame 301, the pressing plate 208 is the same in diameter with the top inner wall of the observation frame 301, the inner wall of the sealing plate 205 is fixedly connected with a liquid injection pipe 209, the bottom of the liquid injection pipe 209 is fixedly connected with the pressing plate 208, the liquid injection pipe 209 is used for injecting the fluorescent silicon dioxide nanoparticles into the experimental coal, after the sealing plate 205 and the top end of the observation frame 301 complete the lamination, the first telescopic rod 207 drives the pressing plate 208 to translate to the top of the coal, through the cooperation of the pressing plate 208 and the sealing strip 407, auxiliary clamping support is formed on both sides of the coal, providing stable conditions for the subsequent experiment, when the seepage simulation experiment is carried out, the fluorescent silicon dioxide nanoparticles are injected into the inside of the coal sample through the liquid injection pipe 209, the micro camera 307 is used for tracking the migration track of the particles in the pore network of the coal body; when the displacement simulation experiment is carried out, the dynamic pressure is applied to the fluorescent silicon dioxide nanoparticles in the liquid injection pipe 209, the displacement effect of the external particles on the internal particles is strengthened, the spatial distribution change of the particles in the coal sample is captured in real time, so that the data collection of the seepage displacement process is completed.

[0044] The outer surface of the support frame 101 is provided with a first sliding groove 104, and a first auxiliary wheel 106 is rotationally connected to the outer wall of the side of the first sliding groove 104 through a rotating shaft, and the first auxiliary wheel 106 is rotationally connected to the inner wall of the first sliding groove 104. The first sliding groove 104 is used to limit the deflection angle of the rotating frame 105 through the first auxiliary wheel 106. Due to the influence of natural gravity on the seepage displacement simulation test results of the coal sample, the first motor 103 drives the rotating frame 105 to rotate, drives the observation frame 301 fixedly connected with the first connecting frame 107 to overturn, and makes the coal sample change from a vertical state to a horizontal state. By changing the direction of gravity, the change law of the seepage displacement process under different gravity conditions can be observed and analyzed. In the test scene of simulating the crushing of the coal sample in the underground coal seam, the first telescopic rod 207 pushes the extrusion plate 208 to apply a controllable pressure to the coal sample, and the micro camera 307 is used to record the damage evolution process of the microstructure of the coal body in real time, and synchronously monitor the migration trajectory and distribution state of the fluorescent silicon dioxide nanoparticles in the coal body cracks.

[0045] In the study of the damage mechanism of the coal sample under the coupling action of high pressure, dynamic impact load and underground water infiltration of the underground coal seam, the damage modes caused by different incentives will lead to differences in seepage displacement, and the natural gravity field also has interference effect on the results of the same coal sample under different experimental conditions. Therefore, by configuring the support mechanism 1 and the adjusting mechanism 2, a bidirectional clamping structure is formed by the extrusion plate 208 and the stressed frame 405, so as to provide stable conditions for the coal sample experiment. In the seepage simulation test, the fluorescent silicon dioxide nanoparticles are injected through the liquid injection pipe 209, and the micro camera 307 is used to track the migration trajectory of the particles in the coal body cracks. In the displacement simulation test, dynamic pressure is applied to the fluorescent particles in the liquid injection pipe 209 to strengthen the displacement effect of the external particles on the internal particles, so as to realize the dynamic simulation of the seepage process of the coal body. When the influence mechanism of the gravity field on the seepage displacement results needs to be explored, the first motor 103 drives the rotating frame 105 to drive the observation frame 301 fixedly connected with the first connecting frame 107 to complete the attitude conversion, so as to adjust the coal sample from the vertical working condition to the horizontal working condition. By comparing the test data under different gravity directions, the action law of the gravity factor on the seepage displacement process is analyzed.

[0046] Embodiment two: please refer to Figures 5-7On the basis of embodiment one, the application provides technical solutions: the outer surface of the second adjusting frame 303 is provided with a second motor 304, the output end of the second motor 304 penetrates through the second adjusting frame 303 and is fixedly connected with a rotating wheel 305, the rotating wheel 305 is rollingly connected to the inner wall of the second sliding groove 302, the inner wall of the second adjusting frame 303 is fixedly connected with a micro camera 307, the two side inner walls of the second adjusting frame 303 close to the micro camera 307 are fixedly connected with auxiliary light sources 306, the auxiliary light sources 306 are used for improving the light source during the observation process of the micro camera 307, during the process of the coal sample micro damage and seepage displacement simulation test, the second motor 304 drives the rotating wheel 305 to drive the second adjusting frame 303 to rotate along the outer surface of the observation frame 301, the relative position between the micro camera 307 and the coal sample is dynamically adjusted, and it is ensured that the coal sample surface multiple regions can be observed in all directions, the auxiliary light sources 306 are configured on the two sides of the micro camera 307, the optical contrast of the coal sample surface micro features is enhanced by emitting laser interference grid illumination beams, the imaging resolution and the definition of the micro camera 307 are optimized, and thus visual basis is provided for the test analysis.

[0047] During the process of the coal sample micro damage and seepage displacement simulation test, because the distribution of the fragile parts of the coal body has randomness and unpredictability, it is difficult to accurately position the micro damage area, therefore, the observation mechanism is arranged, the second motor 304 drives the rotating wheel 305 to drive the second adjusting frame 303 to do the circular motion along the outer surface of the observation frame 301, the relative position between the micro camera 307 and the coal sample is dynamically adjusted, and thus visual data support is provided for the coal body damage observation.

[0048] Embodiment three: please refer to Figures 8-9On the basis of embodiment one and embodiment two, the application provides a technical scheme: the bottom of the observation frame 301 is provided with an auxiliary mechanism 4, the auxiliary mechanism 4 comprises a second telescopic rod 401, the second telescopic rod 401 is fixedly connected to the inner wall of the bottom of the observation frame 301, the output end of the second telescopic rod 401 is fixedly connected with a sealing frame 402, the sealing frame 402 is fixedly connected with a third motor 404 on the side outer wall close to the second telescopic rod 401, the output end of the third motor 404 is fixedly connected with a stress frame 405, the stress frame 405 is provided with a third sliding groove 406 on the side outer surface close to the sealing frame 402, the sealing frame 402 is rotationally connected with a second auxiliary wheel 403 on the side outer wall close to the third sliding groove 406, the second auxiliary wheel 403 is rollingly connected on the inner wall of the third sliding groove 406, the sealing frame 402 has the same diameter as the inner wall of the high-pressure-resistant glass 310, when the coal block is observed microscopically, in order to enhance the damage effect of the internal structure of the coal block, the third motor 404 is used to drive the stress frame 405 to apply a controllable rotary torque to the coal block, under the state that the stress frame 405 is bidirectionally clamped and constrained by the pressing plate 208, the rotation of the stress frame 405 will cause the coal block to produce torsional deformation, so as to promote the expansion of the original fissure in the coal body and induce the generation of new fissures, thereby improving the damage degree of the microscopic structure of the coal block and effectively enhancing the microscopic damage observation effect, and providing test data for the study of the damage evolution law of the coal body under complex stress conditions.

[0049] The outer surface of the stress frame 405 is fixedly sleeved with a sealing strip 407, the side outer wall of the stress frame 405 close to the sealing frame 402 is fixedly connected with a gas injection port 409, the side outer surface of the stress frame 405 away from the gas injection port 409 is provided with a gas outlet 410, and the side outer surface of the stress frame 405 close to the gas outlet 410 is provided with a water outlet 408, in view of the fact that the underground coal seam is in a complex stress environment for a long time, in order to simulate the response of the coal body under real working conditions, after the third motor 404 stops driving the stress frame 405 to rotate, high-pressure gas is injected into the internal sealed cavity of the observation frame 301 through the gas injection port 409 and the gas outlet 410. In this process, the pressure detector 308 monitors the pressure intensity on the inner side of the high-pressure-resistant glass 310 in real time, so as to ensure that the pressure parameter is controllable, and at the same time, the sealing strip 407 and the sealing plate 205 are used to prevent gas leakage.

[0050] In the simulation of microcosmic destruction of the coal block, in order to restore the multiple factors of the natural environment to the coal body and control the destruction degree, through setting the auxiliary mechanism 4, in the coal block sample test, the third motor 404 drives the force frame 405 to apply a controllable rotation torque to the coal block, in the state that the extrusion plate 208 and the force frame 405 form bidirectional clamping constraints, the coal block is made to produce torsional deformation through the rotation of the force frame 405, the internal crack of the coal body is expanded to enhance the observability of microcosmic destruction, at the same time, the gas injection port 409 injects high-pressure gas into the internal sealing cavity of the observation frame 301 through the gas outlet 410, the pressure detector 308 is used to monitor the pressure intensity on the inner side of the high-pressure resistant glass 310 in real time, through the regulation of the gas pressure parameters, the simulation and quantitative measurement of the microcosmic destruction process of the coal block under different confining pressure conditions are realized.

[0051] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0052] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and does not limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A coal seam micro-destruction process control measurement and seepage displacement simulation test device, comprising a support mechanism (1), wherein the support mechanism (1) comprises a support frame (101), a bottom outer wall of the support frame (101) is fixedly connected to a support foot (102), an outer surface of the support frame (101) is fixedly connected to a first motor (103), an output end of the first motor (103) is fixedly connected to a rotating frame (105), a top of the rotating frame (105) is fixedly connected to a dual-axis motor (108), and an outer wall of the rotating frame (105) on a side away from the dual-axis motor (108) is fixedly connected to a first connecting frame (107), characterized in that: An observation mechanism (3) is fixedly connected to the top of the first connecting frame (107); The observation mechanism (3) comprises: An observation frame (301), wherein the bottom of the observation frame (301) is fixedly connected to the top of the first connecting frame (107), the inner wall of the observation frame (301) is fixedly connected to a high-pressure resistant glass (310), the outer surface of the observation frame (301) is provided with a second sliding groove (302), and the outer surface of the observation frame (301) is slidably connected to a second adjustment frame (303); A limit pin (309) is fixedly connected to the top outer wall of the observation frame (301), and a pressure detector (308) is fixedly connected to the inner wall of the observation frame (301) on one side close to the limit pin (309).

2. The device for controlling and measuring the microscopic damage process of coal seams and simulating seepage displacement according to claim 1, characterized in that: A second motor (304) is provided on the outer surface of the second adjustment frame (303); an output end of the second motor (304) passes through the second adjustment frame (303) and is fixedly connected to a rotating wheel (305); the rotating wheel (305) is rollingly connected to the inner wall of the second sliding groove (302); the second motor (304) causes the second adjustment frame (303) to rotate along the outer surface of the observation frame (301) via the rotating wheel (305).

3. The device for controlling and measuring the microscopic damage process of coal seams and simulating seepage displacement according to claim 2, characterized in that: The inner wall of the second adjustment frame (303) is fixedly connected to a microscopic camera (307), and the inner walls on both sides of the second adjustment frame (303) close to the microscopic camera (307) are fixedly connected to auxiliary light sources (306), and the auxiliary light sources (306) are used to improve the light source for the microscopic camera (307) during the observation process.

4. The coal seam micro-destruction process control measurement and seepage displacement simulation test device according to claim 1, characterized in that: An auxiliary mechanism (4) is provided at the bottom of the observation frame (301), the auxiliary mechanism (4) comprising a second telescopic rod (401), the second telescopic rod (401) being fixedly connected to the inner wall of the bottom of the observation frame (301), the output end of the second telescopic rod (401) being fixedly connected to a sealing frame (402), the outer wall of the sealing frame (402) on a side close to the second telescopic rod (401) being fixedly connected to a third motor (404), the output end of the third motor (404) being fixedly connected to a force-bearing frame (405), the outer surface of the force-bearing frame (405) on a side close to the sealing frame (402) being provided with a third sliding groove (406), the outer wall of the sealing frame (402) on a side close to the third sliding groove (406) being rotatably connected to a second auxiliary wheel (403) via a rotating shaft, the second auxiliary wheel (403) being rollingly connected to the inner wall of the third sliding groove (406), and the sealing frame (402) having the same diameter as the inner wall of the high-pressure resistant glass (310).

5. The coal seam micro-destruction process control measurement and seepage displacement simulation test device according to claim 4, characterized in that: The outer surface of the force-bearing frame (405) is fixedly sleeved with a sealing strip (407); the outer wall of the force-bearing frame (405) on one side close to the sealing frame (402) is fixedly connected with an air injection port (409); the outer surface of the force-bearing frame (405) on one side away from the air injection port (409) is provided with an air outlet (410); the outer surface of the force-bearing frame (405) on one side close to the air outlet (410) is provided with a water outlet (408); the air injection port (409) injects high-pressure gas into the internal sealing area of ​​the observation frame (301) through the air outlet (410).

6. The coal seam micro-destruction process control measurement and seepage displacement simulation test device according to claim 1, characterized in that: The output end of the dual-axis motor (108) is provided with an adjustment mechanism (2), the adjustment mechanism (2) comprising a first adjustment frame (201), the inner wall of the first adjustment frame (201) being fixedly connected to the output end of the dual-axis motor (108), and a limiting rod (203) being fixedly connected to the inner wall of a side of the first adjustment frame (201) away from the dual-axis motor (108), the limiting rod (203) being used to limit the deflection angle of the first adjustment frame (201).

7. The device for controlling and measuring the microscopic damage process of coal seams and simulating seepage displacement according to claim 6, characterized in that: The inner wall of the first adjustment frame (201) away from the limiting rod (203) is fixedly connected to a hydraulic rod (202), the output end of the hydraulic rod (202) is fixedly connected to a second connecting frame (204), the outer wall of the second connecting frame (204) away from the hydraulic rod (202) is fixedly connected to a sealing plate (205), the outer surface of the sealing plate (205) is provided with a through hole (206), and the through hole (206) is limited to be slidably sleeved on the limiting pin (309).

8. The coal seam micro-destruction process control measurement and seepage displacement simulation test device according to claim 7, characterized in that: A first telescopic rod (207) is fixedly connected to the inner wall of one side of the second connecting frame (204) close to the sealing plate (205); an output end of the first telescopic rod (207) passes through the sealing plate (205) and is fixedly connected to an extrusion plate (208); the first telescopic rod (207) is used to push the extrusion plate (208) to slide on the inner wall of the observation frame (301); the extrusion plate (208) has the same diameter as the inner wall of the top of the observation frame (301).

9. The coal seam micro-destruction process control measurement and seepage displacement simulation test device according to claim 8, characterized in that: The inner wall of the sealing plate (205) is fixedly connected with an injection pipe (209), the bottom of the injection pipe (209) is fixedly connected to the extrusion plate (208), and the injection pipe (209) is used to inject fluorescent silica nanoparticles into the experimental coal block.

10. The coal seam micro-destruction process control measurement and seepage displacement simulation test device according to claim 1, characterized in that: The outer surface of the support frame (101) is provided with a first sliding groove (104); the outer wall of the rotating frame (105) on one side close to the first sliding groove (104) is rotatably connected to a first auxiliary wheel (106) via a rotating shaft; the first auxiliary wheel (106) is rotatably connected to the inner wall of the first sliding groove (104); the first sliding groove (104) is used to limit the deflection angle of the rotating frame (105) through the first auxiliary wheel (106).

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