Depth monitoring device for frozen wall of inclined shaft

Abstract

The invention relates to the field of detection equipment, and particularly discloses an inclined shaft frozen wall depth monitoring device which monitors freezing expansion pressure of different-depth parts of a frozen layer in real time in the freezing process through a monitoring cylinder with pressure detection assemblies evenly distributed on the outer wall. The freezing wall circle crossing condition is judged according to changes of pressure values of the multiple pressure detection assemblies which are evenly distributed in different directions and different depths, a traditional water level observation method is replaced, and then the accuracy of judgment of the freezing wall circle crossing depth is improved; and meanwhile, through a water drawing pipe arranged below the monitoring cylinder and a heating assembly arranged in the monitoring cylinder, water flow of a shaft layer is drained in time, pressure relief is conducted on the shaft layer, the forming speed of the frozen curtain is increased, heating is conducted through a heating wire, the flowability of overflowing water flow is maintained, the upward drainage continuity of the overflowing water flow is guaranteed, and the pressure relief effect is improved.

Description

Technical Field

[0001] The invention relates to the field of detection equipment, and more specifically to a device for monitoring the depth of a frozen wall of an inclined shaft. Background Art

[0002] The principle of the coal mine inclined shaft freezing construction method is mainly based on the principle of thermodynamics. Through artificial refrigeration, the refrigeration unit is used to convert heat into work, extract heat from the frozen material, and gradually cool it down to the predetermined temperature. Before the inclined shaft is excavated, the unstable strata around the shaft (such as quicksand silt, aquifer, etc.) are frozen to form a solid and closed protective body called a frozen wall. The intersection of frozen walls refers to the phenomenon that during the freezing construction process, the frozen cylinders of adjacent freezing holes gradually expand and connect with each other to begin to form a closed frozen wall. Specifically, when artificial refrigeration methods are used to transfer low temperature to the stratum through circulating low-temperature brine, etc., the water in the stratum is frozen to form frozen soil columns. As the freezing process continues, these frozen soil columns will gradually expand and intersect and connect with each other, eventually forming a complete and closed frozen wall. This process is called the intersection of frozen walls, and the intersection of frozen walls to form a frozen curtain means that after the frozen wall is completely intertwined and reaches a certain strength and thickness, it forms a solid frozen wall anti-seepage curtain in the water-containing saturated soil, namely the freezing curtain.

[0003] The water level observation method is used to determine whether the frozen wall has been completed. It is mainly achieved by setting up water level observation holes in the aquifer and monitoring the changes in the water level in the holes. When the frozen wall begins to be completed, due to the effect of frost heave, the static water level in the hole will rise, and even overflow the ground. This is the main sign that the frozen wall has been completed. If the water level is observed to rise and remain stable, it means that the frozen wall has been successfully completed and a closed frozen cylinder has been formed. On the contrary, if the water level changes abnormally, such as the rising speed slows down or decreases, it may mean that the frozen wall is not completely completed or there are other problems, which require further inspection and analysis. Therefore, the water level observation method is an intuitive and effective method to determine whether the frozen wall is completed.

[0004] However, the water level observation method cannot obtain the thickness of the frozen curtain formed after the freezing wall is circled. Generally, empirical judgment is used. After the overflow water flow has overflowed for seven consecutive days, it is judged that the thickness of the frozen curtain has reached the requirement, and there is ambiguity in the judgment. Summary of the invention

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

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A device for monitoring the depth of a frozen wall of an inclined well, comprising a device body, the device body comprising a monitoring tube for inserting into a frozen layer, a water pumping pipe for inserting into a wellbore layer being nested at the lower part of the monitoring tube, a filter hole evenly distributed is provided at the lower part of the water pumping pipe, a mounting tube is fixedly connected to the upper end of the monitoring tube, and the mounting tube is connected to a connecting pipe extending to the ground; A plurality of groups of circumferential pressure monitoring mechanisms which are vertically and equidistantly distributed are arranged on the outer wall of the monitoring tube, each group of circumferential pressure monitoring mechanisms includes a plurality of pressure detection components which are circumferentially and equidistantly distributed, and the pressure detection components include an extrusion plate which is slidably nested in the shell wall of the monitoring tube, a sliding rod is fixedly connected to the inner side of the extrusion plate, the sliding rod is slidably connected to a fixed tube which is fixedly connected to the monitoring tube, a pressure sensor is fixedly connected to the inner wall of the fixed tube which is away from the sliding rod, and the pressure sensor is abutted against the end of the sliding rod through a spring; A heating assembly is provided in the monitoring tube, which includes a heat-conducting tube fixedly nested in the monitoring tube, a heating wire is provided on the outside of the heat-conducting tube, an insulating tube fixedly connected to the inner wall of the monitoring tube is provided on the outside of the heating wire, and a temperature sensor is fixedly connected to the outlet of the upper end of the monitoring tube.

[0008] As a further solution of the present invention, multiple pressure sensors, temperature sensors and heating wires are electrically connected to the same controller. The controller is equipped with a monitoring system, which 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 multiple pressure sensors, and the temperature monitoring module is connected to the temperature sensor; 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 displays the pressure values ​​of multiple pressure sensors on the display screen according to the corresponding set depths; the heating module is connected to the heating wire.

[0009] As a further solution of the present invention, 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. When the pressure value of the pressure sensor at the frozen position fluctuates, the early warning module issues an early warning.

[0010] As a further solution of the present invention, the monitoring tube is a vertical cylindrical structure, and a uniformly distributed sliding cavity is opened on the circumferential side wall of the monitoring tube. The extrusion plate is nested in the sliding cavity and slides against the inner wall of the sliding cavity. The fixed tube is fixedly connected to the side wall of the sliding cavity away from the extrusion plate. The sliding cavity is a concave cavity with an open outer end and a rectangular cross-section, and the extrusion plate is a rectangular plate-like structure.

[0011] As a further solution of the present invention, a sealing cylinder is fixedly connected to the lower opening position of the monitoring cylinder, a water pumping pipe passes through the sealing cylinder and is slidably connected to the sealing cylinder, the upper end of the water pumping pipe is fixedly connected to a support frame, the upper end of the support frame is fixedly connected to an electric push rod, and the upper end of the electric push rod is fixedly connected to a radial rod fixedly connected to the inner wall of the mounting cylinder.

[0012] As a further solution of the present invention, the sealing cylinder is a vertical cylindrical structure with a vertical circular hole vertically opened in the center thereof, the water pumping pipe is nested in the vertical cylinder, and a sealing ring which is interference fit with the water pumping pipe is nested and fixed on the inner wall of the vertical cylinder.

[0013] As a further solution of the present invention, the water-drawing pipe is a cylindrical structure with an open upper end and a disc portion provided on its upper part. A limiting ring arranged opposite to the disc portion is provided in the monitoring tube, and a water level sensor arranged opposite to the inner cavity of the water-drawing pipe is fixedly connected to the lower end of the support frame.

[0014] As a further solution of the present invention, a blocking assembly is installed at the lower part of the monitoring tube, and the blocking assembly includes an expansion bag nested and fixed in the shell wall of the lower part of the monitoring tube. The expansion bag is connected to an infusion pump installed in the shell wall of the monitoring tube through an infusion pipeline. The infusion pump is connected to a liquid storage bag through an infusion pipeline. The liquid storage bag is filled with a low-temperature saline solution.

[0015] Compared with the prior art, the advantages of the present invention are: (1) The present invention is provided with a monitoring tube with pressure detection components evenly distributed on the outer wall, so as to monitor the freezing expansion pressure of different depths of the frozen layer in real time during the freezing process, and judge the freezing wall intersection situation by the change of the pressure values ​​of multiple evenly distributed pressure detection components in different directions and at different depths, thereby replacing the traditional water level observation method, thereby improving the accuracy of the judgment of the freezing wall intersection depth.

[0016] (2) The present invention uses a water suction pipe arranged below the monitoring tube to timely drain the water flow in the wellbore layer, relieve the pressure on the wellbore layer, and improve the forming speed of the freezing curtain; in addition, a heating component is arranged in the monitoring tube, and the heat insulation tube of the heating component is used to reduce the heat absorption of the freezing layer to the water flow passing through the monitoring tube. At the same time, the temperature of the overflowing water flow is detected by a temperature sensor, and the overflowing water flow passing through the monitoring tube is heated in conjunction with the heating wire, thereby ensuring the continuity of the overflowing water flow and improving the pressure relief effect.

[0017] (3) The present invention uses an early warning module to provide a timely early warning when a pressure sensor in a frozen wall experiences a pressure value fluctuation during wellbore excavation operations, thereby improving the safety of the excavation operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 It is a module schematic diagram of the monitoring system in the present invention; Figure 5 It is a schematic diagram of the assembly of the monitoring tube and the plugging tube in the present invention; Figure 6 It is a schematic diagram of the assembly structure of the heating component and the monitoring tube in the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the plugging component in the present invention; Figure 8 It is a schematic diagram of the installation position of the present invention in shaft construction.

[0019] Explanation of the numbers in the figure: 1. Monitoring cylinder; 101. Sliding cavity; 2. Water drawing 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. Mounting cylinder; 13. Sealing cylinder; 14. Sealing ring; 15. Limiting ring; 16. Temperature sensor; 17. Heating assembly; 18. Sealing assembly; 19. Expansion bag; 20. Infusion pump; 21. Liquid storage bag; 22. Heat-conducting cylinder; 23. Heating wire; 24. Insulating cylinder; 25. Radial rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1-8 In one embodiment of the present invention, a device for monitoring the depth of a frozen wall of an inclined well includes a device body, the device body includes a monitoring tube 1 for inserting into a frozen layer, a water-drawing pipe 2 for inserting into a wellbore layer is nested at the lower part of the monitoring tube 1, and evenly distributed filter holes 201 are opened at the lower part of the water-drawing pipe 2. The upper end of the monitoring tube 1 is fixedly connected to a mounting tube 12, and the mounting tube 12 is connected to a connecting pipe extending to the ground; See also Figure 1 and Figure 3 , a plurality of groups of circumferential pressure monitoring mechanisms are arranged on the outer wall of the monitoring tube 1 at equal intervals in vertical direction, each group of circumferential pressure monitoring mechanisms includes a plurality of pressure detection components 3 which are equally spaced in the circumference, the pressure detection component 3 includes an extrusion plate 5 which is 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 which is fixedly connected to the monitoring tube 1, a pressure sensor 9 is fixedly connected to the inner wall of the fixed tube 7 which is away from the sliding rod 6, and the pressure sensor 9 is abutted against the end of the sliding rod 6 through a spring 8; See also Figure 3 and Figure 6 A heating assembly 17 is provided in the monitoring tube 1, and 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, and 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.

[0024] See also Figure 4 , multiple pressure sensors 9, temperature sensors 16 and heating wires 23 are all electrically connected to the same controller. The controller is equipped with a monitoring system, which includes a control module. The input ends of the control module are respectively connected to a pressure monitoring module and a temperature monitoring module. The input end of the pressure monitoring module is connected to 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 a freezing depth indication module and a heating module, and the output end of the freezing depth indication module is connected to a display screen. The freezing depth indication module displays the pressure values ​​of multiple pressure sensors 9 on the display screen according to the corresponding set depths; the heating module is connected to the heating wire 23.

[0025] 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 becomes fixed at a certain fixed pressure value, it is determined that the freezing wall at the depth position has completed the circle to form a freezing curtain.

[0026] For details, please refer to Figure 8 The above monitoring device comprises the following steps when in use: Step 1: After the freezing pipes of the inclined shaft are arranged, the hydrological holes are 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 shaft 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. 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 assembly 3 are set as needed. Specifically, when the distribution density of the pressure detection assembly 3 is higher, the accuracy of monitoring the frozen wall thickness is higher; 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 assembly 3 and the temperature sensor 16 set at the upper opening of the monitoring tube 1 to monitor the freezing depth.

[0027] 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, and the freezing expansion pressure of the monitoring tube 1 in all 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 freezing wall intersection to form the frozen curtain is obtained. At the same time, multiple groups of circumferential pressure monitoring mechanisms set at different heights are used to judge the freezing depth of the frozen wall. In addition, the water flow in the wellbore layer after the formation of the freezing curtain is discharged through the water-drawing pipe 2 (with the formation of the freezing curtain, the water flow pressure in the wellbore layer gradually increases), and the water flow flowing into the water-drawing pipe 2 is discharged upward through the heat-conducting tube 22 of the heating component 17, and 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 upward discharge process, the heat-insulating 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 upward 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.

[0028] Compared with the traditional hydrological pipe, the present invention uses a monitoring tube 1 with pressure detection components 3 evenly distributed on the outer wall to monitor the freezing expansion pressure of different depths of the frozen layer during the freezing process in real time, 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, instead of 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 under the monitoring tube 1, the water flow of the wellbore layer is drained in time, the pressure of the wellbore layer is relieved, and the forming speed of the freezing curtain is improved; 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 cooperation with the heating wire 23, to ensure the continuity of the overflowing water flow and improve the pressure relief effect.

[0029] See also Figure 5 The monitoring tube 1 is a vertical cylindrical structure. A uniformly distributed sliding cavity 101 is opened on the circumferential side wall of the monitoring tube 1. 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.

[0030] Specifically, when the frozen layer freezes, the soil containing moisture in the frozen layer frost-swells, and the frozen soil expands to squeeze the extrusion plate 5, and part of the frozen soil intrudes into the sliding cavity 101, so that the monitoring tube 1 is wrapped and clamped by the frozen soil, further improving the stability of the monitoring tube 1, and the overflowing water flows upward through the inside of the monitoring tube 1, further accelerating the formation of the freezing curtain.

[0031] See also 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-shaped structure.

[0032] Specifically, the squeezing plate 5 moves toward the center of the monitoring tube 1 when squeezed by the frozen soil.

[0033] In another embodiment of the present invention, see Figure 2 , Figure 3 , Figure 4 and Figure 5 A blocking tube 13 is fixedly connected at the lower opening position of the monitoring tube 1, the water drawing pipe 2 passes through the blocking tube 13 and is slidably connected to the blocking tube 13, the upper end of the water drawing pipe 2 is fixedly connected to a support frame 10, the upper end of the support frame 10 is fixedly connected to an 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 mounting tube 12.

[0034] See also Figure 4The 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 the display screen. When the pressure value of the pressure sensor 9 at the frozen position fluctuates, the early warning module issues an early warning.

[0035] Specifically, when excavation operations are being carried out in the wellbore layer, the electric push rod 11 is started, and the electric push rod 11 drives the water pumping pipe 2 to be recovered into the monitoring tube 1 through the support frame 10, and the filter hole 201 of the water pumping pipe 2 is blocked by the blocking tube 13. There is no need to disassemble the hydrological pipe and block the hydrological hole, thereby improving the overall construction efficiency. At the same time, the monitoring tube 1 continues to remain in the freezing curtain. During the wellbore excavation operation, the freezing curtain is monitored. When the pressure sensor 9 of the pressure detection assembly 3 detects a pressure fluctuation and the pressure fluctuation is greater than the threshold value, an early warning is issued in time to remind the operator to check the strength of the freezing curtain and increase the freezing power of the freezing pump in time.

[0036] See also Figure 5 The sealing 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 which is interference-fitted with the water-drawing pipe 2 is nested and fixed on the inner wall of the vertical cylinder.

[0037] Specifically, the water-drawing pipe 2 is sealed by the sealing ring 14 to prevent water from flowing back into the working surface of the wellbore layer through the water-drawing pipe 2, thereby improving construction safety.

[0038] See also Figure 3 The water-drawing pipe 2 is a cylindrical structure with an opening at the upper end, and a disc portion is provided on the upper part thereof. A limiting ring 15 arranged opposite to the disc portion is provided in the monitoring tube 1, and a water level sensor 4 arranged opposite to the inner cavity of the water-drawing pipe 2 is fixedly connected to the lower end of the support frame 10.

[0039] Specifically, the water level in the water pipe 2 is monitored by the water level sensor 4 before the freezing curtain is formed, to assist in judging the formation of the freezing wall and the discharge of water. When the water level in the water pipe 2 becomes higher and higher, it indicates that the freezing wall is gradually taking shape; when the water level in the water pipe 2 rises sharply in a short period of time, it indicates that the freezing wall has been circled; when the wellbore excavation operation is being carried out, when the water pipe 2 drops continuously or the water level is very low, it indicates that the excavator is close to the water pipe 2, reminding the operator to retract the water pipe 2 into the monitoring tube 1 in time to improve the excavation safety; it should be noted that the water level sensor 4 is a laser liquid level sensor.

[0040] See also Figure 3 and Figure 7A blocking assembly 18 is installed at the lower part of the monitoring tube 1. The blocking assembly 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 pipeline. The infusion pump 20 is connected to a liquid storage bag 21 through an infusion pipeline. The liquid storage bag 21 is filled with a low-temperature saline solution.

[0041] Specifically, before starting the freezing pipe to perform the freezing operation, the infusion pump 20 is started first. The infusion pump 20 injects the low-temperature salt solution from the storage bag 21 into the expansion bag 19, so that the expansion bag 19 expands and contacts the inner wall of the hydrological hole, thereby sealing the gap between the hydrological hole and the monitoring tube 1, reducing the overflow of water into the gap between the hydrological hole and the monitoring tube 1 before the freezing curtain is formed, reducing the fluidity of the water flow in the frozen layer, and accelerating the formation of the frozen wall in the frozen layer; at the same time, during the wellbore excavation operation, the expansion bag 19 seals the lower end of the hydrological hole to prevent external water flow or residues formed by the broken frozen wall from falling through the hydrological hole into the wellbore working surface, thereby improving the safety of the construction; it should be noted that by filling with low-temperature salt solution, the filling liquid in the expansion bag 19 is prevented from freezing and being unable to flow.

[0042] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

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-drawing pipe (2) for inserting into a wellbore layer being nested at the lower part of the monitoring tube (1), the lower part of the water-drawing 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), 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 which are vertically and equidistantly distributed, each group of circumferential pressure monitoring mechanisms comprises a plurality of pressure detection components (3) which are circumferentially and equidistantly distributed, the pressure detection component (3) comprising an extrusion plate (5) which is slidably nested in the shell wall of the monitoring tube (1), a sliding rod (6) being fixedly connected to the inner side of the extrusion plate (5), the sliding rod (6) being slidably connected to a fixed tube (7) which is fixedly connected to the monitoring tube (1), a pressure sensor (9) being fixedly connected to the inner wall of the fixed tube (7) which is away from the sliding rod (6), the pressure sensor (9) being 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) comprising a heat-conducting tube (22) fixedly nested in the monitoring tube (1), a heating wire (23) being 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) being provided on the outside of the heating wire (23), and a temperature sensor (16) being fixedly connected to the outlet at the upper end of the monitoring tube (1).

2. The device for monitoring the depth of frozen wall in an inclined shaft according to claim 1, characterized in that: The plurality of pressure sensors (9), temperature sensors (16) and heating wires (23) are all electrically connected to the same controller. 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. The freezing depth indication module displays the pressure values ​​of the plurality of pressure sensors (9) on the display screen according to the corresponding set depths. The heating module is connected to the heating wire (23).

3. The device for monitoring the depth of a frozen wall in an inclined shaft according to claim 2, 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. When the pressure value of the pressure sensor (9) at the frozen position fluctuates, the early warning module issues an early warning.

4. The device for monitoring the depth of 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.

5. The device for monitoring the depth of frozen wall in an inclined shaft according to claim 1, characterized in that: A blocking tube (13) is fixedly connected to the lower opening 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), an upper end of the water pumping pipe (2) is fixedly connected to a support frame (10), an upper end of the support frame (10) is fixedly connected to an electric push rod (11), and an upper end of the electric push rod (11) is fixedly connected to a radial rod (25) fixedly connected to the inner wall of the mounting tube (12).

6. The device for monitoring the depth of frozen wall in an inclined shaft according to claim 5, 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) which is interference-fitted with the water-drawing pipe (2) is nested and fixed on the inner wall of the vertical cylinder.

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

8. The device for monitoring the depth of frozen wall in an inclined shaft according to claim 1, characterized in that: A blocking component (18) is installed at the lower part of the monitoring tube (1), and the blocking component (18) comprises an expansion bag (19) which is nested and fixed in the shell wall of the lower part of the monitoring tube (1), and the expansion bag (19) is connected to an infusion pump (20) installed in the shell wall of the monitoring tube (1) through an infusion pipeline, and the infusion pump (20) is connected to a liquid storage bag (21) through an infusion pipeline, and the liquid storage bag (21) is filled with a low-temperature saline solution.

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