Underground chamber rock mass crack propagation height measuring equipment

Abstract

The invention provides underground chamber rock mass crack propagation height measuring equipment. Comprising a placing frame, the top of the placing frame is fixedly connected with a positioning cylinder, the top of the placing frame is fixedly connected with a hand-cranking wire spool, the outer wall of the hand-cranking wire spool is sleeved with a steel wire rope, one end of the steel wire rope is fixedly connected with the upper plugging plate in two plugging plates, and the other end of the steel wire rope is fixedly connected with the lower plugging plate. The top of the placement frame is fixedly connected with a water pump, the water suction end of the water pump is fixedly connected with a water suction pipe, a water drainage pipe of the water pump is fixedly connected with a liquid drainage pipe, and one end of the liquid drainage pipe penetrates through the plugging plates and extends to the outer side; a pushing mechanism is arranged on the plugging plates, a packing mechanism is fixed to the pushing mechanism, a measuring mechanism is fixed between the upper plugging plate and the lower plugging plate, and a positioning mechanism is arranged on the inner wall of the positioning cylinder. The hole opening support device provides support for the hole opening, and hole opening collapse caused by operation or other external force is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of rock crack measurement, and in particular relates to a device for measuring the extension height of rock cracks in an underground chamber. Background Art

[0002] During the construction and operation of underground chambers (such as mines, tunnels or underground storage facilities), the formation and propagation of rock cracks are important factors affecting the safety and stability of the structures. Therefore, accurately monitoring and evaluating the propagation of rock cracks, especially the changes in their height, is crucial to ensuring the safety of these underground spaces.

[0003] In the prior art (Announcement No. CN118816731A, Patent Name: "An Apparatus for Measuring the Height of Rock Crack Extension in an Underground Chamber"), two sets of metal discs are placed in a borehole via a steel wire rope. A vacuum pump applies pressure through a switching valve, which pressurizes the two sets of metal discs. The air pressure compresses the rock-adhering membranes on the metal discs, causing them to expand. As the membranes expand, they adhere tightly to the rock wall, forming two completely sealed pressure chambers. A cavity is then formed between the two sets of metal discs. A liquid reservoir then injects water containing a fluorescent agent into the cavity through two pressure pipes. The switching valve switches the pressure, and the vacuum pump pressurizes the cavity through the two pressure pipes. A rotating camera, inserted deep into the chamber, detects the presence of a water-conducting fracture if fluorescent liquid drips into the chamber. The height of the water-conducting fracture zone is determined by the up-and-down movement of the steel wire rope. During the implementation of this technical solution, at least the following problems were discovered in the prior art.

[0004] During operation, existing devices may cause the borehole entrance to collapse due to improper operation or other external forces, causing irreversible damage to the equipment. Traditional measuring equipment often causes additional damage to the borehole wall when moving or adjusting its position. This damage not only affects the structural integrity of the hole wall, but may also change the original stress state, thereby interfering with the natural process of crack propagation. Especially when using high-definition probes for crack imaging, falling rock fragments may directly hit the probe, causing damage to the equipment. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems in the prior art, namely, damage to the borehole wall and high-definition probe caused by improper operation or other external forces. To this end, the present invention proposes an underground chamber rock crack propagation height measurement device.

[0006] In order to achieve the above object, the specific technical scheme of the present application is as follows: a kind of underground chamber rock mass crack propagation height measuring equipment, including placing rack, the top of the placing rack is fixedly connected with positioning cylinder, the top of the placing rack is fixedly connected with hand winding reel, the outer wall of the hand winding reel is sleeved with steel wire rope, one end of the steel wire rope is fixedly connected with the upper one of two sealing plates, the upper and lower two sealing plates are fixedly connected by support, the top of the placing rack is fixedly connected with water pump, the water suction end of the water pump is fixedly connected with suction pipe, the drain pipe of the water pump is fixedly connected with liquid discharge pipe, one end of the liquid discharge pipe penetrates sealing plate and extends to outside, the sealing plate is provided with propulsion mechanism, the propulsion mechanism is fixed with sealing mechanism, the measuring mechanism is fixed between the upper and lower two sealing plates, the inner wall of the positioning cylinder is provided with positioning mechanism.

[0007] Preferably, the positioning mechanism includes an annular convex guide rail fixedly connected to the inner wall of the positioning cylinder, the outer wall of the annular convex guide rail is slidably connected with a rotating disc, the top of the rotating disc is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is slidably connected with a sliding rod, the bottom of the sliding rod is fixedly connected with a positioning rod, the positioning rod penetrates the inner wall of the positioning cylinder and extends to the outside, and the end of the positioning rod away from the sliding rod is fixedly connected with an arc-shaped positioning plate.

[0008] Preferably, the top of the rotating disc is fixedly connected with an L-shaped connecting rod, the inside of the L-shaped connecting rod is provided with a reset cavity, the inner wall of the reset cavity is fixedly connected with a reset spring, the bottom end of the reset spring is fixedly connected with a pressing plate, the bottom of the pressing plate is fixedly connected with a clamping column, the outer wall of the positioning cylinder is provided with a limiting slot, and the inner wall of the limiting slot is provided with a plurality of limiting holes.

[0009] Preferably, the propulsion mechanism includes a fixed circular plate fixedly connected to the side wall of the sealing plate, the inner wall of the fixed circular plate is fixedly connected with a connecting spring, and the end of the connecting spring away from the fixed circular plate is fixedly connected with a lower pressing plate.

[0010] Preferably, the side wall of the lower pressing plate is rotatably connected with a push plate, the end of the push plate away from the lower pressing plate is rotatably connected with a T-shaped push rod, one end of the T-shaped push rod penetrates the inner wall of the fixed circular plate and extends to the outside, and the end of the T-shaped push rod away from the push plate is fixedly connected with a caster.

[0011] Preferably, the sealing mechanism includes a first air cylinder fixedly connected to the inner wall of the fixed circular plate, the output end of the first air cylinder is fixedly connected with a lifting plate, the side wall of the lifting plate is fixedly connected with a lifting connecting rod, the end of the lifting connecting rod away from the lifting plate penetrates the side wall of the sealing plate and extends to the inside, and the end of the lifting connecting rod away from the lifting plate is fixedly connected with a pressing plate.

[0012] Preferably, a hydraulic cavity is provided inside the sealing plate, the side wall of the extrusion plate is slidably connected to the inner wall of the hydraulic cavity, a drainage hole is provided on the inner wall of the hydraulic cavity, and a rubber sealing airbag is fixedly connected to the inner wall of the sealing plate.

[0013] Preferably, a measuring mechanism is provided on the outer wall of the blocking plate, and the measuring mechanism includes a fixing frame fixedly connected to the outer wall of the blocking plate, a side wall of the fixing frame is fixedly connected to a servo motor, an output end of the servo motor is fixedly connected to a driving bevel gear, a side wall of the driving bevel gear is meshedly connected to a driven bevel gear, a bottom of the driven bevel gear is fixedly connected to a driving shaft, and an end of the driving shaft away from the driven bevel gear is fixedly connected to a fixing ring.

[0014] Preferably, a waterproof cylinder is fixedly connected to the inner wall of the fixing ring, a high-definition probe is fixedly connected to the inner wall of the waterproof cylinder, and a pressure sensor is fixedly connected to the side wall of the fixing frame.

[0015] Preferably, the outer wall of the fixing ring is fixedly connected to the second cylinder, the output end of the second cylinder is fixedly connected to the connecting bracket, the side wall of the connecting bracket is fixedly connected to the guide groove plate, the end of the waterproof cylinder is fixedly connected to the I-shaped guide rail, the side wall of the I-shaped guide rail is slidably connected to the semicircular sealing disk, the side wall of the semicircular sealing disk is fixedly connected to the guide rod, and the outer wall of the guide rod is slidably connected to the inner wall of the guide groove plate.

[0016] The present invention has the following beneficial effects compared to the prior art: The underground chamber rock crack extension height measuring device of the present invention drives the rotating disk to rotate as the L-shaped connecting rod moves, and the arc groove on the rotating disk guides the sliding rod to ensure that the sliding rod moves according to a predetermined trajectory. The sliding rod drives the positioning rod and the arc-shaped positioning plate to provide support for the hole opening, preventing the hole opening from collapsing due to operation or other external forces, and providing a stable working environment for subsequent crack extension height measurement. In addition, due to the adjustable design of the positioning mechanism, it adapts to the needs of holes of different sizes and shapes, increasing the versatility and flexibility of the device.

[0017] The underground chamber rock crack extension height measuring device of the present invention rotates the hand-cranked winding reel to lower the sealing plate to the specified position. During the lowering process, the connecting spring pulls the lower pressure plate to move, and the lower pressure plate pushes the T-shaped push rod and the casters to expand outward through the push plate. As the T-shaped push rod pushes, the casters gradually approach the borehole wall until they are in close contact with the borehole wall, so that the sealing plate is kept in the center position of the borehole, ensuring that the sealing plate will not directly touch the borehole wall during the lowering process, which not only protects the sealing plate from damage, but also avoids additional damage to the borehole wall, thereby ensuring the accuracy of subsequent measurement work.

[0018] The underground chamber rock crack propagation height measuring device of the present invention, when the sealing plate is lowered to a predetermined position, the first cylinder drives the lifting plate to retract, and the lifting plate drives the lifting connecting rod and the extrusion plate, and the extrusion plate applies pressure to the hydraulic chamber, and the liquid in the hydraulic chamber is forced to be discharged through the drainage hole and flows to the rubber sealing airbag. The inflated rubber sealing airbag is in close contact with the borehole wall to form an effective sealing area. This sealing area can be used as a fracturing test section to isolate the test area from other parts to ensure the accuracy and effectiveness of the experiment. The rubber sealing airbag can effectively prevent rock fragments that may fall during the detection process from directly hitting the high-definition probe, thereby avoiding damage to the equipment and ensuring the quality of data acquisition.

[0019] The underground chamber rock crack extension height measuring device of the present invention, after completing the fracturing test, first needs to drain the water in the test section to provide a dry working environment for subsequent operations, the second cylinder drives the connecting bracket and the guide groove plate to move toward the fixed ring, the guide rod slides along the specific path of the guide groove plate, the guide rod will drive the semicircular sealing disk to move outward, thereby exposing the high-definition probe, and the high-definition probe begins to accurately measure the cracks in the hole wall. After completing the crack measurement, the second cylinder is operated in reverse to make the connecting bracket and the guide groove plate return to the initial position, the semicircular sealing disk is closed, and the port of the waterproof tube is sealed to protect the high-definition probe from the influence of the external environment, such as moisture, dust and other possible physical damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the blocking plate of the present invention; Figure 3 It is a schematic structural diagram of the positioning mechanism of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at center A; Figure 5 It is a schematic structural diagram of the rotating disk of the present invention; Figure 6 This is a schematic diagram of the rubber sealing airbag structure of the present invention; Figure 7 It is a structural schematic diagram of the propulsion mechanism of the present invention; Figure 8It is a cross-sectional view of the sealing mechanism structure of the present invention; Figure 9 This is a schematic diagram of the structure of the high-definition probe of the present invention; Figure 10 It is a schematic structural diagram of the measuring mechanism of the present invention; Figure 11 This is a schematic diagram of the structure of the semicircular occluding disk of the present invention; Figure 12 It is a schematic structural diagram of the cleaning mechanism of the present invention.

[0022] In the figure: 101, placement rack; 102, positioning cylinder; 103, hand-cranked winding drum; 104, wire rope; 111, blocking plate; 112, drainage pipe; 113, water pump; 114, suction pipe; 2, positioning mechanism; 201, annular convex guide rail; 202, rotating disk; 203, arc groove; 204, sliding rod; 205, positioning rod; 206, arc positioning plate; 21, L-shaped connecting rod; 22, reset chamber; 23, reset spring; 24, pressing plate; 25, clamping column; 26, limit notch; 27, limit hole; 3, pushing mechanism; 301, fixed circular plate; 302, connecting spring; 303, lower pressure plate; 304, push plate; 305, T-shaped push rod; 306, caster; 4, sealing mechanism; 401 , first cylinder; 402, lifting plate; 403, lifting connecting rod; 404, extrusion plate; 405, hydraulic chamber; 406, drainage hole; 407, rubber sealing airbag; 5, measuring mechanism; 501, fixing frame; 502, servo motor; 503, driving bevel gear; 504, driven bevel gear; 505, driving shaft; 506, fixing ring; 507, waterproof cylinder; 508, high-definition probe; 509, pressure sensor; 51, second cylinder; 52, connecting bracket; 53, guide groove plate; 54, I-shaped guide rail; 55, semicircular sealing disk; 56, guide rod; 6, cleaning mechanism; 601, connecting frame; 602, jet cylinder; 603, jet tube; 604, extrusion circular plate; 605, L-shaped extrusion rod. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 11As shown, the present invention is an underground chamber rock crack propagation height measurement device, including a placement frame 101, a positioning cylinder 102 is fixedly connected to the top of the placement frame 101, and the positioning cylinder 102 can be inserted into the rock borehole as the basic support point of the entire device. The top of the placement frame 101 is fixedly connected to a hand-cranked winding drum 103, and the outer wall of the hand-cranked winding drum 103 is sheathed with a steel wire rope 104. One end of the steel wire rope 104 is fixedly connected to the upper one of the two upper and lower sealing plates 111 connected by a bracket. The upper and lower sealing plates 111 are parallel to each other. This configuration is used to rotate the hand-cranked winding drum 103 to lower the sealing plate 111 to a specified position, and also includes: The positioning mechanism 2 includes an annular convex guide rail 201 fixedly connected to the inner wall of the positioning cylinder 102, and the outer wall of the annular convex guide rail 201 is slidably connected to a rotating disk 202. The top of the rotating disk 202 is provided with an arc-shaped groove 203, and the inner wall of the arc-shaped groove 203 is slidably connected to a slide rod 204. The bottom of the slide rod 204 is fixedly connected to a positioning rod 205. The positioning rod 205 passes through the inner wall of the positioning cylinder 102 and extends to the outside. The end of the positioning rod 205 away from the slide rod 204 is fixedly connected to an arc-shaped positioning plate 206. This arrangement is to allow the arc groove 203 on the rotating disk 202 to guide the slide bar 204, ensuring that the slide bar 204 moves along a predetermined trajectory. The slide bar 204 drives the positioning rod 205 and the arc positioning plate 206 to provide support for the opening of the hole. The positioning rod 205 passes through the inner wall of the positioning tube 102 and extends to the outside. The end thereof is fixedly connected to the arc positioning plate 206. When the rotating disk 202 rotates, its arc groove 203 guides the slide bar 204 to move along a predetermined trajectory, thereby driving the positioning rod 205 and the arc positioning plate 206 to support the inner wall of the hole.

[0025] An L-shaped connecting rod 21 is fixedly connected to the top of the rotating disk 202, and a reset cavity 22 is opened inside the L-shaped connecting rod 21. A reset spring 23 is fixedly connected to the inner wall of the reset cavity 22, and the bottom end of the reset spring 23 is fixedly connected to a pressing plate 24. The bottom of the pressing plate 24 is fixedly connected to a clamping column 25. A limiting slot 26 is opened on the outer wall of the positioning cylinder 102, and a plurality of limiting holes 27 are opened on the inner wall of the limiting slot 26. This arrangement can be made by holding the L-shaped connecting rod 21 and pressing the pressing plate 24 to make the clamping column 25 on the pressing plate 24 move away from the limiting hole 27, thereby releasing the L-shaped connecting rod 21 so that it can slide in the limiting slot 26.

[0026] A water pump 113 is fixedly connected to the top of the placement rack 101, a water suction end of the water pump 113 is fixedly connected to a water suction pipe 114, and a drainage pipe of the water pump 113 is fixedly connected to a drainage pipe 112. One end of the drainage pipe 112 passes through the sealing plate 111 and extends to the outside.

[0027] When the jack is in the jack-up position, the jack 302 is in the jack-up position, and the jack 303 is in the jack-up position, and the jack 304 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack 306 is in the jack-up position, and the jack When the caster 306 is in the positioning cylinder 102, the positioning cylinder 102 restricts the caster 306 from retracting into the positioning cylinder 102, and the spring is in a stretched state at this time; after the blocking plate 111 is lowered to be free from the restriction of the positioning cylinder 102, the spring returns to a naturally stretched state, driving the caster 306 to extend outward and then abut against the inner wall of the drill hole.

[0028] The inner wall of the fixed circular plate 301 is provided with a sealing mechanism 4, which includes a first cylinder 401 fixedly connected to the inner wall of the fixed circular plate 301, the output end of the first cylinder 401 is fixedly connected to the lifting plate 402, the side wall of the lifting plate 402 is fixedly connected to the lifting connecting rod 403, the end of the lifting connecting rod 403 away from the lifting plate 402 passes through the side wall of the blocking plate 111 and extends to the inside, the end of the lifting connecting rod 403 away from the lifting plate 402 is fixedly connected to the extrusion plate 404, and the interior of the blocking plate 111 is provided with a sealing mechanism 401. The hydraulic chamber 405 and the side walls of the extrusion plate 404 are slidably connected to the inner wall of the hydraulic chamber 405. A drainage hole 406 is provided on the inner wall of the hydraulic chamber 405. A rubber sealing airbag 407 is fixedly connected to the inner wall of the sealing plate 111. This arrangement is to enable the first cylinder 401 to drive the lifting plate 402 to retract, and the lifting plate 402 to drive the lifting connecting rod 403 and the extrusion plate 404. The extrusion plate 404 applies pressure to the hydraulic chamber 405, and the liquid in the hydraulic chamber 405 is forced to be discharged through the drainage hole 406 and flow to the rubber sealing airbag 407.

[0029] A measuring mechanism 5 is provided on the outer wall of the blocking plate 111, and the measuring mechanism 5 includes a fixing frame 501 fixedly connected to the outer wall of the blocking plate 111, and a servo motor 502 is fixedly connected to the side wall of the fixing frame 501, and the output end of the servo motor 502 is fixedly connected to the driving bevel gear 503, and the side wall of the driving bevel gear 503 is meshed with the driven bevel gear 504, and the bottom of the driven bevel gear 504 is fixedly connected to the driving shaft 505, and the end of the driving shaft 505 away from the driven bevel gear 504 is fixedly connected to the fixing ring 506, and the inner wall of the fixing ring 506 is fixedly connected to the waterproof cylinder 507, and the inner wall of the waterproof cylinder 507 is fixedly connected to the high-definition probe 508. This arrangement is for the servo motor 502 to drive the driving bevel gear 503 and the driven bevel gear 504 to rotate, so that the fixing ring 506 drives the high-definition probe 508 to measure the crack, and the side wall of the fixing frame 501 is fixedly connected to the pressure sensor 509, and the pressure sensor 509 is used to collect pressure data.

[0030] The outer wall of the fixing ring 506 is fixedly connected to the second cylinder 51, the output end of the second cylinder 51 is fixedly connected to the connecting bracket 52, the side wall of the connecting bracket 52 is fixedly connected to the guide groove plate 53, the end of the waterproof tube 507 is fixedly connected to the I-shaped guide rail 54, the side wall of the I-shaped guide rail 54 is slidably connected to the semicircular sealing disk 55, the side wall of the semicircular sealing disk 55 is fixedly connected to the guide rod 56, the outer wall of the guide rod 56 is slidably connected to the inner wall of the guide groove plate 53, and this arrangement is for the second cylinder 51 to drive the connecting bracket 52 and the guide groove plate 53 to move toward the fixing ring 506, and the guide rod 56 slides along a specific path of the guide groove plate 53. The guide rod 56 will drive the semicircular sealing disk 55 to move outward, thereby exposing the high-definition probe 508, and reverse the operation of the second cylinder 51, and the semicircular sealing disk 55 is closed to protect the high-definition probe 508 from the influence of the external environment.

[0031] like Figure 12As shown, the high-definition probe 508 is susceptible to external environmental factors such as moisture, dust, etc., which can cause lens blur, sensor failure, etc., thereby affecting the accuracy of the measurement results. However, in winter or cold environments, due to the large temperature difference between the deep hole and the ground surface, as the hole depth increases, the air temperature inside the hole will rise, causing the moisture in the air to liquefy on the outer wall of the lens, the glass lens of the camera area fogs, and the hole wall image cannot be clearly captured, resulting in poor camera effect and inability to distinguish the inside of the hole. The outer wall of the waterproof cylinder 507 is provided with a cleaning mechanism 6, which includes a connecting frame 601 fixedly connected to the outer wall of the waterproof cylinder 507, a gas jet cylinder 602 fixedly connected to the inner wall of the connecting frame 601, a gas jet pipe 603 communicated with the outer surface of the gas jet cylinder 602, the gas jet pipe 603 penetrating through the outer wall of the waterproof cylinder 507 and extending to the inside, and a extrusion circular plate 604 slidingly connected to the inner wall of the gas jet cylinder 602. The side wall of the extrusion circular plate 604 is fixedly connected with an L-shaped extrusion rod 605, and the side wall of the L-shaped extrusion rod 605 is fixedly connected with the side wall of the connecting bracket 52. In this way, when the semicircular blocking disc 55 is opened, the connecting bracket 52 drives the L-shaped extrusion rod 605 and the extrusion circular plate 604 to move. The extrusion circular plate 604 exerts pressure on the gas inside the gas jet cylinder 602. The extruded gas is discharged through the gas jet pipe 603 connected with the gas jet cylinder 602 and directly enters the inside of the waterproof cylinder 507. The discharged gas blows at a certain speed and direction to the lens surface of the high-definition probe 508, effectively removing dust, water droplets or other impurities that may be attached thereto, ensuring that the high-definition probe 508 is in the best working state, prolonging the service life of the equipment, and improving the accuracy and reliability of data acquisition.

[0032] The working principle of the present application is as follows: a drilling device is used to drill a hole in the rock mass for measurement. The positioning cylinder 102 on the device is inserted into the drilled hole in the rock mass as the base support point of the entire device. The operator can hold the L-shaped connecting rod 21 and press the pressing plate 24 to release the L-shaped connecting rod 21, so that it can slide in the limiting groove 26. The movement of the L-shaped connecting rod 21 drives the rotating disc 202 to rotate. The arc-shaped groove 203 on the rotating disc 202 guides the sliding rod 204 to move along the predetermined trajectory. The sliding rod 204 drives the positioning rod 205 and the arc-shaped positioning plate 206 (through the rotating diameter expansion tensioning mechanism) to provide support for the hole opening, preventing the hole opening from collapsing due to operation or other external forces, and providing a stable working environment for subsequent crack extension height measurement. In addition, due to the adjustable design of the positioning mechanism 2, it can adapt to different sizes and shapes of holes, increasing the versatility and flexibility of the device.

[0033] Then, the hand-cranked winding reel 103 is turned to lower the sealing plate 111 to the designated position. During the lowering process, the connecting spring 302 pulls the lower pressure plate 303 to move, and the lower pressure plate 303 pushes the T-shaped push rod 305 and the caster 306 to expand outward through the push plate 304. As the T-shaped push rod 305 pushes, the caster 306 gradually approaches the wall of the drill hole until it is in close contact with the wall of the hole, so that the sealing plate 111 remains in the center position of the drill hole, ensuring that the sealing plate 111 will not directly touch the wall of the hole during the lowering process, which not only protects the sealing plate 111 from damage, but also avoids causing additional damage to the wall of the drill hole, ensuring the accuracy of subsequent measurement work.

[0034] When the blocking plate 111 is lowered to the predetermined position, the first cylinder 401 drives the lifting plate 402 to retract, and the lifting plate 402 drives the lifting connecting rod 403 and the extrusion plate 404. The extrusion plate 404 applies pressure to the hydraulic chamber 405. The liquid in the hydraulic chamber 405 (the hydraulic chamber 405 itself has a part of liquid. The hydraulic chamber 405 is a closed cavity processed inside the blocking plate 111. The liquid in the hydraulic chamber 405 is pre-injected during the equipment manufacturing, assembly or initial debugging stage. Once injected and sealed by the extrusion plate 404, the cavity will be in a normal working cycle, that is, the cylinder returns to the normal working cycle. During compression and extrusion, the liquid is treated as a medium enclosed in a cavity and is pushed back and forth by the extrusion plate. The liquid is forced to be discharged through drainage hole 406 and flow to rubber sealing bladder 407. The inflated rubber sealing bladder 407 comes into close contact with the borehole wall, forming an effective sealing area. This sealing area can be used as a fracturing test section, isolating the test area from other parts to ensure the accuracy and effectiveness of the experiment. The rubber sealing bladder 407 can effectively prevent rock fragments that may fall during the test process from directly hitting the high-definition probe 508, thereby avoiding damage to the equipment and ensuring the quality of data acquisition.

[0035] The water pump 113 is started and injects water into the fracturing test section through the discharge pipe 112. The water injection process needs to be carried out slowly to ensure that the development of the cracks and the response of the rock mass to the pressure can be accurately observed. The pressure sensor 509 synchronously collects pressure data and displays the fracturing curve in real time to help researchers understand the relationship between crack expansion and pressure changes. At the same time, during the process of injecting water into the cracks, the pressure of the water can make originally hidden or inconspicuous cracks more obvious.

[0036] After completing the fracturing test, the water in the test section needs to be drained first to provide a dry working environment for subsequent operations. The second cylinder 51 drives the connecting bracket 52 and the guide groove plate 53 to move toward the fixed ring 506, and the guide rod 56 slides along the specific path of the guide groove plate 53. The guide rod 56 will drive the semicircular sealing disk 55 to move outward, thereby exposing the high-definition probe 508. The high-definition probe 508 begins to accurately measure the cracks in the hole wall, including the extension size of the cracks in the vertical direction (gravity direction). After completing the crack measurement, the second cylinder 51 is operated in reverse to make the connecting bracket 52 and the guide groove plate 53 return to the initial position. The semicircular sealing disk 55 is closed, sealing the port of the waterproof tube 507, and protecting the high-definition probe 508 from the influence of the external environment, such as moisture, dust and other possible physical damage.

[0037] When the semicircular sealing disk 55 is opened, the connecting bracket 52 drives the L-shaped extrusion rod 605 and the extrusion circular plate 604 to move. The extrusion circular plate 604 applies pressure to the gas inside the jet cylinder 602. The squeezed gas is discharged through the jet tube 603 connected to the jet cylinder 602 and directly enters the waterproof cylinder 507. The discharged gas blows toward the lens surface of the high-definition probe 508 at a certain speed and direction, effectively removing dust, water droplets or other impurities that may be attached to it, ensuring that the high-definition probe 508 is in the best working condition, extending the service life of the equipment, and improving the accuracy and reliability of data acquisition.

[0038] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention.

Claims

1. An underground chamber rock crack extension height measuring device, comprising a placement frame (101), a positioning cylinder (102) fixedly connected to the top of the placement frame (101), a hand-cranked winding drum (103) fixedly connected to the top of the placement frame (101), a steel wire rope (104) sheathed on the outer wall of the hand-cranked winding drum (103), one end of the steel wire rope (104) fixedly connected to the upper one of the two blocking plates (111), and the upper and lower blocking plates (111) are fixedly connected by a bracket at intervals, characterized in that: A water pump (113) is fixedly connected to the top of the placement rack (101), a water suction end of the water pump (113) is fixedly connected to a water suction pipe (114), a drainage pipe of the water pump (113) is fixedly connected to a liquid discharge pipe (112), one end of the liquid discharge pipe (112) passes through the blocking plate (111) and extends to the outside, a propulsion mechanism (3) is provided on the blocking plate (111), a sealing mechanism (4) is fixed on the propulsion mechanism (3), a measuring mechanism (5) is fixed between the upper and lower blocking plates (111), and a positioning mechanism (2) is provided on the inner wall of the positioning cylinder (102).

2. The underground chamber rock crack propagation height measuring device according to claim 1, characterized in that: The positioning mechanism (2) comprises an annular convex guide rail (201) fixedly connected to the inner wall of the positioning cylinder (102); the outer wall of the annular convex guide rail (201) is slidably connected to a rotating disk (202); the top of the rotating disk (202) is provided with an arc groove (203); the inner wall of the arc groove (203) is slidably connected to a sliding rod (204); the bottom of the sliding rod (204) is fixedly connected to a positioning rod (205); the positioning rod (205) passes through the inner wall of the positioning cylinder (102) and extends to the outside; the end of the positioning rod (205) away from the sliding rod (204) is fixedly connected to an arc positioning plate (206).

3. The underground chamber rock crack propagation height measuring device according to claim 2, characterized in that: The top of the rotating disk (202) is fixedly connected to an L-shaped connecting rod (21), a reset cavity (22) is provided inside the L-shaped connecting rod (21), an inner wall of the reset cavity (22) is fixedly connected to a reset spring (23), a bottom end of the reset spring (23) is fixedly connected to a pressing plate (24), a bottom of the pressing plate (24) is fixedly connected to a clamping column (25), an outer wall of the positioning cylinder (102) is provided with a limiting notch (26), and an inner wall of the limiting notch (26) is provided with a plurality of limiting holes (27).

4. The underground chamber rock crack propagation height measuring device according to claim 1, characterized in that: The propulsion mechanism (3) comprises a fixed circular plate (301) fixedly connected to the side wall of the blocking plate (111), a connecting spring (302) fixedly connected to the inner wall of the fixed circular plate (301), and a lower pressing plate (303) fixedly connected to one end of the connecting spring (302) away from the fixed circular plate (301).

5. The underground chamber rock crack propagation height measuring device according to claim 4, characterized in that: The side wall of the lower pressure plate (303) is rotatably connected to a push plate (304), and one end of the push plate (304) away from the lower pressure plate (303) is rotatably connected to a T-shaped push rod (305), one end of the T-shaped push rod (305) passes through the inner wall of the fixed circular plate (301) and extends to the outside, and one end of the T-shaped push rod (305) away from the push plate (304) is fixedly connected to a caster (306).

6. The underground chamber rock crack propagation height measuring device according to claim 4, characterized in that: The inner wall of the fixed circular plate (301) is provided with a sealing mechanism (4), and the sealing mechanism (4) comprises a first cylinder (401) fixedly connected to the inner wall of the fixed circular plate (301), the output end of the first cylinder (401) is fixedly connected to the lifting plate (402), the side wall of the lifting plate (402) is fixedly connected to a lifting connecting rod (403), the end of the lifting connecting rod (403) away from the lifting plate (402) passes through the side wall of the sealing plate (111) and extends to the inner side, and the end of the lifting connecting rod (403) away from the lifting plate (402) is fixedly connected to the extrusion plate (404).

7. The underground chamber rock crack propagation height measuring device according to claim 6, characterized in that: A hydraulic cavity (405) is provided inside the blocking plate (111), a side wall of the extrusion plate (404) is slidably connected to the inner wall of the hydraulic cavity (405), a drainage hole (406) is provided on the inner wall of the hydraulic cavity (405), and a rubber blocking airbag (407) is fixedly connected to the inner wall of the blocking plate (111).

8. The underground chamber rock crack propagation height measuring device according to claim 1, characterized in that: The measuring mechanism (5) comprises a fixing frame (501) fixedly connected to the outer wall of the blocking plate (111); a servo motor (502) is fixedly connected to the side wall of the fixing frame (501); an output end of the servo motor (502) is fixedly connected to a driving bevel gear (503); a side wall of the driving bevel gear (503) is meshingly connected to a driven bevel gear (504); a driving shaft (505) is fixedly connected to the bottom of the driven bevel gear (504); and a fixing ring (506) is fixedly connected to one end of the driving shaft (505) away from the driven bevel gear (504).

9. The underground chamber rock crack propagation height measuring device according to claim 8, characterized in that: The inner wall of the fixing ring (506) is fixedly connected to a waterproof cylinder (507), the inner wall of the waterproof cylinder (507) is fixedly connected to a high-definition probe (508), and the side wall of the fixing frame (501) is fixedly connected to a pressure sensor (509).

10. The underground chamber rock crack propagation height measuring device according to claim 9, characterized in that: The outer wall of the fixing ring (506) is fixedly connected to the second cylinder (51), the output end of the second cylinder (51) is fixedly connected to the connecting bracket (52), the side wall of the connecting bracket (52) is fixedly connected to the guide groove plate (53), the end of the waterproof cylinder (507) is fixedly connected to the I-shaped guide rail (54), the side wall of the I-shaped guide rail (54) is slidably connected to the semicircular sealing disk (55), the side wall of the semicircular sealing disk (55) is fixedly connected to the guide rod (56), and the outer wall of the guide rod (56) is slidably connected to the inner wall of the guide groove plate (53).

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