A device for monitoring the depth of a frozen wall in an inclined shaft

Abstract

The application relates to the field of detection equipment and discloses a device for monitoring the depth of a frozen wall of an inclined shaft, which is characterized in that a monitoring cylinder is provided with pressure detection components which are uniformly distributed on the outer wall, the frozen expansion pressure of different depth parts of the frozen layer in the freezing process is monitored in real time, the change of the pressure values of the multiple pressure detection components which are uniformly distributed in different directions and at different depths is judged to determine the intersection condition of the frozen wall, the traditional water level observation method is replaced, and the accuracy of the judgment of the intersection depth of the frozen wall is improved; meanwhile, a water pumping pipe arranged below the monitoring cylinder and a heating component arranged in the monitoring cylinder are used to timely drain the water flow of the shaft cylinder layer, the shaft cylinder layer is depressurized, the forming speed of the frozen curtain is improved, the heating wire is used for heating to maintain the fluidity of the overflow water flow, the continuity of the upward discharge of the overflow water flow is ensured, and the depressurization effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of detection equipment, more particularly, to a device for monitoring the depth of a frozen wall of an inclined shaft. BACKGROUND

[0002] The principle of the coal mine inclined shaft freezing construction method is mainly based on the thermodynamic principle. Heat is extracted from the frozen material by artificial refrigeration means using a refrigeration unit to gradually lower the temperature and reach the predetermined temperature. Before the inclined shaft is excavated, the unstable stratum (such as quicksand silt, aquifer, etc.) around the shaft is frozen to form a solid and closed protective body called a frozen wall. The freezing wall intersection refers to the phenomenon that during the freezing construction process, the freezing cylinders of adjacent freezing holes gradually expand and connect with each other to form a closed frozen wall. Specifically, when using artificial refrigeration methods, low-temperature brine is circulated and delivered to the stratum to freeze the water in the stratum and form frozen soil cylinders. As the freezing process continues, these frozen soil cylinders gradually expand and connect with each other to form a complete and closed frozen wall. This process is called freezing wall intersection. The formation of a frozen curtain refers to the formation of a solid and impermeable frozen wall in the saturated soil after the freezing wall is completely intersected and reaches a certain strength and thickness.

[0003] The water level observation method determines whether the frozen wall is intersected by setting a water level observation hole in the aquifer and monitoring the change of the water level in the hole. When the frozen wall starts to intersect, the static water level in the hole will rise due to frost heaving, and even overflow the ground, which is the main sign of the intersection of the frozen wall. If the water level is observed to rise and remain stable, it means that the frozen wall has successfully intersected and formed a closed frozen cylinder. On the contrary, if the water level changes abnormally, such as slowing down or dropping, it may mean that the frozen wall is not completely intersected or there are other problems that need to be further checked and analyzed. Therefore, the water level observation method is a direct and effective method to determine whether the frozen wall is intersected.

[0004] However, the water level observation method cannot obtain the thickness of the frozen curtain formed after the intersection of the frozen wall, and generally uses experience to determine that the thickness of the frozen curtain reaches the required thickness after the continuous overflow of the water flow for seven days, which has ambiguity in judgment. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to provide a device for monitoring the depth of a frozen wall of an inclined shaft, which can accurately determine the depth of the frozen wall intersection and improve the accuracy of the determination.

[0006] To solve the above problems, the technical scheme adopted by the present application is as follows.

[0007] The application discloses a kind of inclined shaft frozen wall depth monitoring device, including device body, device body includes the monitoring cylinder for insertion to frozen layer, monitoring cylinder lower part is nested with the dipper tube for insertion to wellbore layer, dipper tube lower part is uniformly distributed with filter hole, monitoring cylinder upper end is fixedly connected with installation cylinder, installation cylinder is communicated with the connecting pipe extending to ground;

[0008] The outer wall of the monitoring cylinder is provided with a plurality of vertical equidistantly distributed circumferential pressure monitoring mechanisms, each circumferential pressure monitoring mechanism includes a plurality of circumferentially equidistantly distributed pressure detection components, the pressure detection component includes an extrusion plate slidingly nested in the shell wall of the monitoring cylinder, the inner side of the extrusion plate is fixedly connected with a sliding rod, the sliding rod is slidingly connected with a fixed cylinder fixedly connected with the monitoring cylinder, a pressure sensor is fixedly connected to the inner wall of the fixed cylinder away from the sliding rod, and the pressure sensor is in abutment with the end of the sliding rod through a spring.

[0009] A heating assembly is arranged in the monitoring cylinder, and the heating assembly includes a heat-conducting cylinder fixedly nested in the monitoring cylinder, a heating wire is arranged on the outer side of the heat-conducting cylinder, a heat-insulating cylinder is arranged on the outer side of the heating wire and fixedly connected with the inner wall of the monitoring cylinder, and a temperature sensor is fixedly connected to the outlet of the upper end of the monitoring cylinder.

[0010] As a further scheme of the application, the plurality of pressure sensors, temperature sensors and heating wires are electrically connected with the same controller, the controller is provided with a monitoring system, the monitoring system includes a control module, the input end of the control module is connected with a pressure monitoring module and a temperature monitoring module, the input end of the pressure monitoring module is connected with the plurality of pressure sensors, and the temperature monitoring module is connected with the temperature sensor; the output end of the control module is connected with a frozen depth indication module and a heating module, the output end of the frozen depth indication module is connected with a display screen, the frozen depth indication module displays the pressure values of the plurality of pressure sensors on the display screen according to the corresponding set depths, and the heating module is connected with the heating wire.

[0011] As a further scheme of the application, the output end of the control module is further connected with a warning module, the output end of the warning module is connected with the display screen, and the warning module issues a warning when the pressure value of the pressure sensor at the frozen position fluctuates.

[0012] As a further scheme of the application, the monitoring cylinder is a vertical cylindrical structure, the circumferential side wall of the monitoring cylinder is provided with a plurality of uniformly distributed sliding cavities, the extrusion plate is nested in the sliding cavity and slidingly abuts against the inner wall of the sliding cavity, and the fixed cylinder is fixedly connected with the side wall of the sliding cavity away from the extrusion plate; the sliding cavity is a recess with an open outer end and a rectangular cross section, and the extrusion plate is a rectangular plate structure.

[0013] As a further scheme of the present application, the lower opening of the monitoring cylinder is fixedly connected with a blocking cylinder, the water pipe penetrates through the blocking cylinder and is slidably connected with the blocking cylinder, the upper end of the water pipe is fixedly connected with a support frame, the upper end of the support frame is fixedly connected with an electric push rod, and the upper end of the electric push rod is fixedly connected with a radial rod fixedly connected with the inner wall of the installation cylinder.

[0014] As a further scheme of the present application, the blocking cylinder is a vertical cylindrical structure, a vertical circular hole is vertically arranged in the center of the vertical cylinder, the water pipe is nested in the vertical cylinder, and a sealing ring in interference fit with the water pipe is fixedly nested in the inner wall of the vertical cylinder.

[0015] As a further scheme of the present application, the water pipe is a cylindrical structure with an open upper end, a disc part is arranged on the upper part of the water pipe, a limiting ring is arranged in the monitoring cylinder and opposite to the disc part, and a water level sensor is arranged on the lower end of the support frame and opposite to the inner cavity of the water pipe.

[0016] As a further scheme of the present application, a blocking assembly is arranged on the lower part of the monitoring cylinder, the blocking assembly comprises an expansion bag fixedly nested in the shell wall of the lower part of the monitoring cylinder, the expansion bag is connected with a transfusion pump arranged in the shell wall of the monitoring cylinder through a transfusion pipeline, the transfusion pump is connected with a storage bag through the transfusion pipeline, and the storage bag is filled with a low-temperature salt solution.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] (1) The present application can monitor the frozen expansion pressure of different depth parts of the frozen layer in the freezing process in real time through the monitoring cylinder with the pressure detection assemblies uniformly distributed on the outer wall, can determine the freezing wall intersection condition through the change of the pressure values of the uniformly distributed multiple pressure detection assemblies in different directions and at different depths, and can replace the traditional water level observation method, thereby improving the accuracy of the determination of the freezing wall intersection depth.

[0019] (2) The present application can timely drain the water flow of the well cylinder layer through the water pipe arranged below the monitoring cylinder, can relieve the pressure of the well cylinder layer, and can improve the forming speed of the frozen curtain; in addition, the heat absorption of the water flow passing through the monitoring cylinder by the frozen layer can be reduced through the heat insulation cylinder of the heating assembly, the temperature of the overflow water flow can be detected through the temperature sensor, and the overflow water flow passing through the monitoring cylinder can be heated through the heating wire, thereby ensuring the continuity of the overflow water flow and improving the pressure relief effect.

[0020] (3) The present application can timely give a warning when the pressure sensor in the frozen wall has a pressure value fluctuation during the excavation operation of the well cylinder through the early warning module, thereby improving the safety of the excavation operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0022] Figure 2 A sectional view structure schematic diagram of the present application;

[0023] Figure 3 A sectional view structure schematic diagram of the present application; Figure 2 An enlarged structure schematic diagram at A in the present application;

[0024] Figure 4 A module schematic diagram of the monitoring system in the present application;

[0025] Figure 5 An assembly schematic diagram of the monitoring cylinder and the plugging cylinder in the present application;

[0026] Figure 6 An assembly structure schematic diagram of the heating assembly and the monitoring cylinder in the present application;

[0027] Figure 7 A three-dimensional structure schematic diagram of the plugging assembly in the present application;

[0028] Figure 8 An installation position schematic diagram of the present application in the wellbore construction.

[0029] Explanation of the reference numerals in the figure: 1, monitoring cylinder; 101, sliding cavity; 2, water suction pipe; 201, filter hole; 3, pressure detection assembly; 4, water level sensor; 5, extrusion plate; 6, sliding rod; 7, fixed cylinder; 8, spring; 9, pressure sensor; 10, support frame; 11, electric push rod; 12, installation cylinder; 13, plugging cylinder; 14, sealing ring; 15, limiting ring; 16, temperature sensor; 17, heating assembly; 18, plugging assembly; 19, expansion balloon; 20, infusion pump; 21, liquid storage balloon; 22, heat conduction cylinder; 23, heating wire; 24, heat insulation cylinder; 25, radial rod. DETAILED DESCRIPTION

[0030] 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, but not all the embodiments; based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] See also Figures 1-8 In one embodiment of the present invention, a device for monitoring the depth of a frozen wall in an inclined well includes a device body, the device body including a monitoring tube 1 for inserting into the frozen layer, a water pumping pipe 2 for inserting into the wellbore layer nested in the lower portion of the monitoring tube 1, the water pumping pipe 2 having evenly distributed filter holes 201 formed in the lower portion, a mounting tube 12 fixedly connected to the upper end of the monitoring tube 1, and the mounting tube 12 communicating with a connecting pipe extending to the ground;

[0034] See also Figure 1 and Figure 3 The outer wall of the monitoring tube 1 is provided with multiple groups of circumferential pressure monitoring mechanisms distributed vertically and equidistantly. Each group of circumferential pressure monitoring mechanisms includes multiple pressure detection components 3 distributed equidistantly around the circumference. The pressure detection component 3 includes an extrusion plate 5 slidably nested in the shell wall of the monitoring tube 1. A sliding rod 6 is fixedly connected to the inner side of the extrusion plate 5. The sliding rod 6 is slidably connected to a fixed tube 7 fixedly connected to the monitoring tube 1. A pressure sensor 9 is fixedly connected to the inner wall of the fixed tube 7 away from the sliding rod 6. The pressure sensor 9 is abutted against the end of the sliding rod 6 through a spring 8.

[0035] See also Figure 3 and Figure 6 A heating assembly 17 is provided in the monitoring tube 1. The heating assembly 17 includes a heat-conducting tube 22 fixedly nested in the monitoring tube 1. A heating wire 23 is provided on the outside of the heat-conducting tube 22. An insulating tube 24 fixedly connected to the inner wall of the monitoring tube 1 is provided on the outside of the heating wire 23. A temperature sensor 16 is fixedly connected to the outlet of the upper end of the monitoring tube 1.

[0036] See also Figure 4, multiple pressure sensors 9, temperature sensors 16 and heating wire 23 are all electrically connected to the same controller. The controller is equipped with a monitoring system. The monitoring system includes a control module. The input end of the control module is respectively connected to the pressure monitoring module and the temperature monitoring module. The input end of the pressure monitoring module is connected to the multiple pressure sensors 9, and the temperature monitoring module is connected to the temperature sensor 16; the output end of the control module is connected to the freezing depth indication module and the heating module, and the output end of the freezing depth indication module is connected to the display screen. The freezing depth indication module displays the pressure values ​​of the multiple pressure sensors 9 on the display screen according to the corresponding set depths; the heating module is connected to the heating wire 23.

[0037] It should be noted that when the freezing expansion pressure value monitored by the pressure sensor 9 at a certain depth changes from zero to a fluctuating state and then to a fixed pressure value, it is determined that the freezing wall at the depth position has completed the circle to form a freezing curtain.

[0038] For details, please refer to Figure 8 , the above monitoring device comprises the following steps when in use:

[0039] Step 1: After the freezing pipes of the inclined wellbore are arranged, a hydrological hole is drilled. The middle position of a pair of adjacent freezing pipes is selected for drilling. The lower end of the hydrological hole extends into the wellbore layer. The monitoring device is installed at the lower end of the connecting pipe, and then the monitoring device is inserted into the hydrological hole.

[0040] It should be noted that the vertical length of the monitoring tube 1 is greater than the vertical depth of the layer to be frozen, and the vertical distribution density and circumferential distribution density of the pressure detection components 3 are set as needed. Specifically, the higher the distribution density of the pressure detection components 3, the higher the accuracy of monitoring the frozen wall thickness.

[0041] Step 2: Start the external cooling pump room, inject the freezing salt solution into the freezing pipe to perform the freezing operation, and start the pressure sensor 9 in the pressure detection component 3 and the temperature sensor 16 set at the upper end opening of the monitoring tube 1 to monitor the freezing depth.

[0042] Specifically, during the freezing process, as the freezing pipe freezes the frozen layer, the water flow in the frozen layer expands after being frozen, squeezing the monitoring tube 1 embedded in the frozen layer, and the squeezing plate 5 moves toward the center of the monitoring tube 1. The squeezing plate 5 squeezes the spring 8 in the fixed tube 7 through the sliding rod 6, and the spring 8 squeezes the pressure sensor 9, and then the freezing expansion pressure of the monitoring tube 1 at this position is monitored through the pressure sensor 9. The freezing expansion pressure of the monitoring tube 1 in various directions at the depth position is monitored through multiple pressure detection components 3 distributed in a circle. When the values ​​of the pressure sensors 9 of the multiple pressure detection components 3 distributed in the circumferential direction no longer fluctuate, that is, the frozen wall at this depth completes the intersection to form a frozen curtain, and then the depth value of the frozen wall intersection to form the frozen curtain is obtained. At the same time, multiple groups of circumferential pressure monitoring mechanisms arranged at different heights are used to judge the freezing depth of the frozen wall.

[0043] In addition, the water flow in the wellbore layer after the formation of the freezing curtain is discharged outward through the water pumping pipe 2 (as the freezing curtain is formed, the water flow pressure in the wellbore layer gradually increases), and the water flow flowing into the water pumping pipe 2 is discharged upward through the heat-conducting tube 22 of the heating component 17. The water flow flowing into the heat-conducting tube 22 flows into the installation tube 12 through the upper opening of the monitoring tube 1, and then is discharged to the ground through the connecting pipe. During the water flow discharge process, the insulation tube 24 insulates the water flow in the heat-conducting tube 22 to prevent the freezing layer from absorbing heat from the monitoring tube 1, causing the water flow to be frozen in the monitoring tube 1. In addition, the water flow temperature is detected by the temperature sensor 16. When the water flow temperature is lower than the set threshold value, the heating wire 23 is started to heat the water flow in the heat-conducting tube 22 to ensure the continuity of the water flow discharge, improve the effect of the wellbore layer pressure relief, improve the safety of the freezing construction, and facilitate the formation of the freezing curtain.

[0044] Compared with traditional hydrological pipes, the present invention monitors the freezing expansion pressure of different depths of the frozen layer during the freezing process in real time by providing a monitoring tube 1 with pressure detection components 3 evenly distributed on the outer wall, and judges the freezing wall intersection situation by the changes in the pressure values ​​of multiple evenly distributed pressure detection components 3 in different directions and at different depths, replacing the traditional water level observation method, thereby improving the accuracy of judging the depth of the freezing wall intersection; at the same time, through the water suction pipe 2 arranged below the monitoring tube 1, the water flow of the wellbore layer is discharged in time, the pressure of the wellbore layer is relieved, and the forming speed of the freezing curtain is increased; in addition, through the heating component 17 arranged in the monitoring tube 1, the insulation tube 24 of the heating component 17 is used to reduce the heat absorption of the frozen layer to the water flow passing through the monitoring tube 1, and at the same time, the temperature of the overflowing water flow is detected by the temperature sensor 16, and the overflowing water flow passing through the monitoring tube 1 is heated in conjunction with the heating wire 23 to ensure the continuity of the overflowing water flow and improve the pressure relief effect.

[0045] See also Figure 5The monitoring cylinder 1 is a vertical cylindrical structure, and a plurality of sliding cavities 101 are uniformly arranged on the circumferential side wall of the monitoring cylinder 1; the extrusion plate 5 is nested in the sliding cavity 101 and is in sliding abutment with the inner wall of the sliding cavity 101; and the fixed cylinder 7 is fixedly connected with the side wall of the sliding cavity 101 away from the extrusion plate 5.

[0046] Specifically, when the freezing layer freezes, the soil in the freezing layer that contains water freezes and expands, the frozen soil expands to extrude the extrusion plate 5, and part of the frozen soil invades into the sliding cavity 101, so that the monitoring cylinder 1 is clamped by the frozen soil, and the stability of the monitoring cylinder 1 is further improved; and the overflow water flows out through the upper part of the monitoring cylinder 1, which further accelerates the formation of the freezing curtain.

[0047] Please refer to Figure 5 The sliding cavity 101 is a concave cavity with an open outer end and a rectangular cross section, and the extrusion plate 5 is a rectangular plate structure.

[0048] Specifically, the extrusion plate 5 moves to the center of the monitoring cylinder 1 when it is extruded by the frozen soil.

[0049] In another embodiment of the present application, please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The monitoring cylinder 1 is fixedly connected with a blocking cylinder 13 at the opening position of the lower part of the monitoring cylinder 1; the water pumping pipe 2 penetrates through the blocking cylinder 13 and is in sliding connection with the blocking cylinder 13; the upper end of the water pumping pipe 2 is fixedly connected with a support frame 10; the upper end of the support frame 10 is fixedly connected with an electric push rod 11; and the upper end of the electric push rod 11 is fixedly connected with a radial rod 25 which is fixedly connected with the inner wall of the installation cylinder 12.

[0050] Please refer to Figure 4 The output end of the control module is further connected with a warning module, the output end of the warning module is connected with the display screen, and the warning module issues a warning when the pressure value of the pressure sensor 9 at the frozen position fluctuates.

[0051] Specifically, when the well shaft layer is excavated, the electric push rod 11 is started, the electric push rod 11 drives the water pumping pipe 2 to be recovered into the monitoring cylinder 1 through the support frame 10, and the filter hole 201 of the water pumping pipe 2 is blocked by the blocking cylinder 13, so that the hydrological pipe does not need to be disassembled and the hydrological hole does not need to be blocked, the overall construction efficiency is improved, and at the same time, the monitoring cylinder 1 continues to be left in the freezing curtain, the freezing curtain is monitored during the well shaft excavation, and when the pressure sensor 9 of the pressure detection assembly 3 detects pressure fluctuation and the pressure fluctuation is greater than a threshold value, a warning is issued in time to remind the operator to check the strength of the freezing curtain and timely improve the freezing power of the freezing pump.

[0052] Please refer to Figure 5The blocking cylinder 13 is a vertical cylindrical structure, and a vertical circular hole is vertically arranged in the center of the blocking cylinder 13. The water pipe 2 is nested in the vertical cylinder. The inner wall of the vertical cylinder is fixedly sleeved with a sealing ring 14 in interference fit with the water pipe 2.

[0053] Specifically, the water pipe 2 is sealed by the sealing ring 14 to avoid the backflow of water through the water pipe 2 into the shaft layer operation surface, thereby improving the safety of construction.

[0054] Please refer to Figure 3 The water pipe 2 is a cylindrical structure with an open upper end, and a disc part is arranged at the upper portion of the water pipe 2. The monitoring cylinder 1 is provided with a limiting ring 15 arranged opposite to the disc part. The water level sensor 4 is fixedly connected to the lower end of the support frame 10 and arranged opposite to the inner cavity of the water pipe 2.

[0055] Specifically, the water level in the water pipe 2 is monitored by the water level sensor 4 before the formation of the freezing curtain, which assists in judging the formation of the freezing wall and the water flow discharge. When the water level in the water pipe 2 is getting higher and higher, it indicates that the freezing wall is gradually forming. When the water level in the water pipe 2 suddenly rises in a short time, it indicates that the freezing wall has been closed. When the shaft is excavated, if the water pipe 2 continuously descends or the water level is very low, it indicates that the excavator is close to the water pipe 2, prompting the operator to timely retract the water pipe 2 into the monitoring cylinder 1, thereby improving the safety of excavation. It should be noted that the water level sensor 4 is a laser liquid level sensor.

[0056] Please refer to Figure 3 and Figure 7 The monitoring cylinder 1 is provided with a blocking assembly 18 at the lower portion. The blocking assembly 18 includes an expansion bag 19 fixedly sleeved in the shell wall of the monitoring cylinder 1. The expansion bag 19 is communicated with a liquid infusion pump 20 installed in the shell wall of the monitoring cylinder 1 through a liquid infusion pipeline. The liquid infusion pump 20 is communicated with a liquid storage bag 21 through a liquid infusion pipeline. The liquid storage bag 21 is filled with a low-temperature salt solution.

[0057] Specifically, before starting the freezing pipe for freezing operation, the liquid infusion pump 20 is started first. The liquid infusion pump 20 injects the low-temperature salt solution from the liquid storage bag 21 into the expansion bag 19, so that the expansion bag 19 is expanded to contact the inner wall of the hydrological hole, thereby blocking the gap between the hydrological hole and the monitoring cylinder 1, reducing the overflow of water into the gap between the hydrological hole and the monitoring cylinder 1 before the formation of the freezing curtain, reducing the flowability of the water in the freezing layer, and accelerating the formation of the freezing wall in the freezing layer. At the same time, during the shaft excavation operation, the expansion bag 19 blocks the lower end of the hydrological hole to avoid the external water flow or the residue formed by the broken freezing wall from falling into the shaft operation surface through the hydrological hole, thereby improving the safety of construction. It should be noted that the filling of the low-temperature salt solution avoids the freezing of the filling liquid in the expansion bag 19.

[0058] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art, according to the technical solution of the present application and the improved concept thereof, makes equivalent replacement or change within the technical range disclosed by the present application, and should be covered within the protection scope of the present application.

Claims

1. A device for monitoring the depth of frozen wall in an inclined shaft, characterized in that: The device comprises a main body, which comprises a monitoring tube (1) for inserting into a frozen layer, a water pumping pipe (2) for inserting into a wellbore layer being nested in the lower part of the monitoring tube (1), the lower part of the water pumping pipe (2) being provided with evenly distributed filtering holes (201), the upper end of the monitoring tube (1) being fixedly connected to a mounting tube (12), and the mounting tube (12) being connected to a connecting pipe extending to the ground; The outer wall of the monitoring tube (1) is provided with a plurality of groups of circumferential pressure monitoring mechanisms distributed vertically and equidistantly, each group of circumferential pressure monitoring mechanisms includes a plurality of pressure detection components (3) distributed equidistantly around the circumference, the pressure detection component (3) including an extrusion plate (5) slidably nested in the shell wall of the monitoring tube (1), a sliding rod (6) is fixedly connected to the inner side of the extrusion plate (5), the sliding rod (6) is slidably connected to a fixed tube (7) fixedly connected to the monitoring tube (1), a pressure sensor (9) is fixedly connected to the inner wall of the fixed tube (7) away from the sliding rod (6), and the pressure sensor (9) is abutted against the end of the sliding rod (6) via a spring (8); The monitoring tube (1) is provided with a heating assembly (17), the heating assembly (17) comprises a heat-conducting tube (22) fixedly nested in the monitoring tube (1), a heating wire (23) is provided on the outside of the heat-conducting tube (22), a heat-insulating tube (24) fixedly connected to the inner wall of the monitoring tube (1) is provided on the outside of the heating wire (23), and a temperature sensor (16) is fixedly connected to the outlet of the upper end of the monitoring tube (1); a plurality of pressure sensors (9), temperature sensors (16) and heating wires (23) are all electrically connected to the same controller, and the controller is equipped with a monitoring system, the monitoring system comprises a control module, the input end of the control module is respectively connected to a pressure monitoring module and a temperature monitoring module, the input end of the pressure monitoring module is connected to the plurality of pressure sensors (9), and the temperature monitoring module is connected to the temperature sensor (16); the output end of the control module is connected to a freezing depth indication module and a heating module, the output end of the freezing depth indication module is connected to a display screen, and the freezing depth indication module is connected to the plurality of pressure sensors (9). The pressure value of the sensor (9) is displayed on the display screen according to the corresponding set depth; the heating module is connected to the heating wire (23); a blocking tube (13) is fixedly connected to the lower opening position of the monitoring tube (1), a water pumping pipe (2) passes through the blocking tube (13) and is slidably connected to the blocking tube (13), the upper end of the water pumping pipe (2) is fixedly connected to the support frame (10), the upper end of the support frame (10) is fixedly connected to the electric push rod (11), and the upper end of the electric push rod (11) is fixedly connected to a radial rod (25) fixedly connected to the inner wall of the installation tube (12); a blocking component (18) is installed at the lower part of the monitoring tube (1), the blocking component (18) includes an expansion bag (19) nested and fixed in the lower shell wall of the monitoring tube (1), the expansion bag (19) is connected to an infusion pump (20) installed in the shell wall of the monitoring tube (1) through an infusion pipe, the infusion pump (20) is connected to a liquid storage bag (21) through the infusion pipe, and the liquid storage bag (21) is filled with a low-temperature salt solution.

2. The device for monitoring the depth of frozen wall in an inclined shaft according to claim 1, characterized in that: The output end of the control module is also connected to an early warning module, and the output end of the early warning module is connected to a display screen. The early warning module issues an early warning when the pressure value of the pressure sensor (9) at the frozen position fluctuates.

3. The device for monitoring the depth of a frozen wall in an inclined shaft according to claim 1, characterized in that: The monitoring tube (1) is a vertical cylindrical structure. The circumferential side wall of the monitoring tube (1) is provided with evenly distributed sliding cavities (101). The extrusion plate (5) is nested in the sliding cavity (101) and slides against the inner wall of the sliding cavity (101). The fixed tube (7) is fixedly connected to the side wall of the sliding cavity (101) away from the extrusion plate (5). The sliding cavity (101) is a concave cavity with an open outer end and a rectangular cross section. The extrusion plate (5) is a rectangular plate-shaped structure.

4. The device for monitoring the depth of frozen wall in an inclined shaft according to claim 1, characterized in that: The blocking cylinder (13) is a vertical cylindrical structure, and a vertical circular hole is vertically opened in the center thereof. The water drawing pipe (2) is nested in the vertical cylinder, and a sealing ring (14) with an interference fit with the water drawing pipe (2) is nested and fixed on the inner wall of the vertical cylinder.

5. The device for monitoring the depth of frozen wall in inclined shaft according to claim 1, characterized in that: The water-drawing pipe (2) is a cylindrical structure with an open upper end, and a disc portion is provided on the upper portion thereof. A limiting ring (15) arranged opposite to the disc portion is provided in the monitoring tube (1). The lower end of the support frame (10) is fixedly connected to a water level sensor (4) arranged opposite to the inner cavity of the water-drawing pipe (2).

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