Underground gasification cavity data acquisition device and method

Abstract

The invention provides an underground gasification cavity data acquisition device and an underground gasification cavity data acquisition method, and belongs to the technical field of detection. The underground gasification cavity data acquisition device comprises a mobile measurement assembly; the mobile measuring assembly comprises a drill rod, a drill bit and a connector; wherein a containing groove is formed in the side wall of the connector, an infrared imager is arranged in the containing groove, and the detection face of the infrared imager faces a groove opening of the containing groove; the drill rod and the drill bit are arranged at the two ends of the connector respectively. The mobile measurement assembly in the underground gasification cavity data acquisition device can drill from the side wall of the drill hole, mobile temperature monitoring is realized by using the infrared imager in the horizontal attitude drilling process, and the distribution of the plane position of the underground gasification cavity can be obtained through the mobile temperature monitoring of the infrared imager, so that the underground gasification cavity data acquisition device can obtain the underground gasification cavity data. Therefore, the detection of the underground gasification cavity is simpler and more convenient.

Description

Technical Field

[0001] The present invention belongs to the field of detection technology, and in particular relates to an underground gasification cavity data acquisition device and an underground gasification cavity data acquisition method. Background Art

[0002] Underground coal gasification (UCG) is a technology that converts coal within a seam into a combustible gas, shifting from traditional physical coal mining to a more efficient chemical gas extraction process. Its basic principle is to generate raw coal gas through the pyrolysis of coal and a series of chemical reactions with oxygen and water vapor.

[0003] In order to achieve underground coal gasification, the coal seam needs to be heated, and then the coal undergoes medium-temperature pyrolysis. During the medium-temperature pyrolysis of the coal, the generated volatiles and coke react with water and oxygen in an oxygen-deficient state to gasify, gradually forming a gasification cavity.

[0004] To better understand the planar position distribution of the gasification cavity, it is necessary to use special equipment and specific methods to detect the gasification cavity. For example, Chinese invention patent application number: 202011145799.5, entitled "Method and Device for Identifying In-situ Gasification Boundaries of Underground Coal," discloses a method for identifying in-situ gasification boundaries of underground coal. The method includes:

[0005] Acquire coal gasification signals in the target area;

[0006] Conduct microseismic event location on the coal gasification signal in the target area to obtain the microseismic source coordinates;

[0007] According to the microseismic source coordinates, the magnitude attributes of the microseismic event are extracted to obtain the magnitude of the microseismic event;

[0008] The microseismic events are displayed according to the magnitude of the microseismic events, and the boundary range of the gasification cavity is identified and determined based on the display interface of the microseismic events.

[0009] The method disclosed in the aforementioned invention patent application is relatively complex to operate, requiring multiple pieces of information to determine the boundaries of the gasification cavity, making the entire acquisition process difficult. Therefore, providing a simple, user-friendly device and method for rapidly acquiring underground gasification cavity data is a pressing technical challenge for those skilled in the art. Summary of the Invention

[0010] In view of the above problems, the present invention proposes an underground gasification cavity data acquisition device to solve the technical problem that it is difficult to acquire underground gasification cavity data in the prior art.

[0011] An underground gasification cavity data acquisition device includes a mobile measurement component;

[0012] The mobile measurement assembly includes a drill rod, a drill bit and a connector; wherein,

[0013] A receiving groove is provided on the side wall of the connector, an infrared imager is provided in the receiving groove, and a detection surface of the infrared imager is provided facing the notch of the receiving groove;

[0014] The drill rod and the drill bit are respectively arranged at two ends of the connector.

[0015] In order to better implement the present invention, further optimization is made in the above structure, wherein the drill pipe includes a plurality of universal joints;

[0016] The universal joint is provided with a through-hole inside, the axis of the through-hole is parallel to the axis of the universal joint, a plurality of the universal joints are connected in sequence, and all the through-holes are connected to form a sealed fluid channel;

[0017] The drill bit is provided with a flushing channel, and the fluid channel is communicated with the flushing channel.

[0018] In order to better implement the present invention, the above structure is further optimized. A jet head for cutting the measuring channel is provided on the side wall of the connector, and the fluid channel is connected to the jet head.

[0019] A cavity is provided in the connector, and an opening and closing component for opening / closing the flushing channel is provided in the cavity.

[0020] In order to better implement the present invention, further optimization is made in the above structure, the opening and closing assembly includes a first motor, a moving plate and a fixed plate;

[0021] The movable disc is sealed and rotatably arranged in the cavity, the actuating end of the first motor is transmission-connected to the movable disc, and a first hole is provided on the movable disc;

[0022] The fixed disk is sealed and fixedly arranged in the cavity, and the fixed disk is attached to a side of the movable disk away from the first motor. The fixed disk is provided with a second hole at a position corresponding to the first hole.

[0023] In order to better implement the present invention, further optimization is made in the above structure. The outer wall of the connector is provided with two expandable and contractible sealing rings. The fluid supply device is connected to the sealing rings through a pipeline. The jet head is arranged between the two sealing rings.

[0024] In order to better implement the present invention, the above structure is further optimized, and a suction port is further provided on the side wall of the connector, and the suction port is provided between the two sealing rings;

[0025] The fluid channel is provided with a suction pipe and a driving roller for driving the suction pipe to extend / contract;

[0026] When it is necessary to suck the liquid between the two sealing rings, the driving roller drives the suction end of the suction tube to extend out of the suction port to perform suction.

[0027] In order to better implement the present invention, the above structure is further optimized. A cylinder is provided in the drill bit; a stopper is slidably provided in the cylinder body; a through-hole is provided on the side wall of the drill bit corresponding to the position of the stopper to facilitate the extension / contraction of the stopper; a receiving tray is provided at the bottom of the cylinder body, and a receiving hole is provided on the receiving tray that is connected to the cylinder body;

[0028] The opening and closing assembly further includes a blocking disk, which is disposed at the actuating end of the first motor and located on a side of the fixed plate away from the first motor. The blocking disk is provided with an unsealing hole at a position corresponding to the receiving hole, and the fixed plate is provided with a third hole at a position corresponding to the first hole, and the second hole is separated from the third hole.

[0029] When the third hole body is coaxial with the first hole body, the unsealing hole is coaxial with the receiving hole, and the liquid can enter the cylinder body through the first hole body, the third hole body, the unsealing hole and the receiving hole in sequence, squeezing the abutment to extend outward from the drill bit.

[0030] In order to better implement the present invention, the above structure is further optimized, and a second motor is provided in the connector, and the second motor is transmission-connected to the infrared imager;

[0031] A sealing member adapted to the notch of the accommodating groove is provided on the back side of the infrared imager, and the second motor can drive the infrared imager to rotate so that the detection surface of the infrared imager faces the notch of the accommodating groove or the sealing member blocks the notch of the accommodating groove.

[0032] In order to better implement the present invention, further optimization is made in the above structure, and the underground gasification cavity data acquisition device further includes a guide;

[0033] The guide is arranged in the vertical drill hole, and a guide opening for facilitating the extension of the mobile measuring component is provided on the side wall of the guide.

[0034] In order to better implement the present invention, further optimization is made in the above structure, wherein the underground gasification cavity data acquisition device further includes a comprehensive monitoring component for measuring the temperature, pressure, flow rate and gas composition of the produced gas;

[0035] The comprehensive monitoring component is arranged at the exhaust port of the underground gasification cavity.

[0036] In addition, the present invention also provides a method for acquiring underground gasification cavity data, which is implemented by the above-mentioned underground gasification cavity data acquisition device and includes the following steps:

[0037] The mobile measurement assembly drills from the side wall of the vertical borehole in a nearly horizontal direction, and uses the infrared imager to measure the temperature downward during the drilling process to obtain the plane distribution of the underground gasification cavity.

[0038] In summary, the present invention has at least the following technical effects:

[0039] The mobile measuring component in the underground gasification cavity data acquisition device can drill from the side wall of the borehole. During the horizontal drilling process, mobile temperature monitoring is achieved using an infrared imager. The mobile temperature monitoring of the infrared imager can obtain the distribution of the planar position of the underground gasification cavity, making the detection of the underground gasification cavity simpler and more convenient.

[0040] In addition, the underground gasification cavity data acquisition device can use the jet head to construct a measurement channel, which can reduce the thickness of the rock between the infrared imager and the underground gasification cavity through the measurement channel, thereby improving the effectiveness and accuracy of the infrared imager's temperature measurement.

[0041] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A schematic structural diagram of an underground gasification cavity data acquisition device according to the present invention is shown;

[0044] Figure 2 A schematic structural diagram of a mobile measurement component in an underground gasification cavity data acquisition device according to the present invention is shown;

[0045] Figure 3 A schematic structural diagram of a drill rod in a mobile measurement assembly of the present invention is shown;

[0046] Figure 4 A schematic structural diagram of a connector in a mobile measurement assembly of the present invention is shown;

[0047] Figure 5 A schematic structural diagram of a drill bit in a mobile measurement assembly of the present invention is shown;

[0048] Figure 6 A schematic structural diagram of an opening and closing component in an underground gasification cavity data acquisition device of the present invention is shown.

[0049] In the figure, 1-mobile measuring component, 11-drill rod, 111-universal joint, 112-fluid channel, 113-suction tube, 114-drive roller, 12-connecting head, 121-accommodating groove; 122-infrared imager, 123-jet head, 124-sealing ring, 125-second motor, 126-seal, 13-drill bit, 131-flushing channel, 132-cylinder body, 133-abutment, 2-guide, 3-opening and closing component, 31-first motor, 32-moving disk, 33-fixed disk, 34-sealing disk. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] Example 1:

[0052] An underground gasification cavity data acquisition device includes a mobile measurement component 1;

[0053] The mobile measuring assembly 1 comprises a drill rod 11, a drill bit 13 and a connector 12, see Figure 2 and Figure 4 ;in,

[0054] A receiving groove 121 is formed on the side wall of the connector 12. An infrared imager 122 is disposed in the receiving groove 121. The detection surface of the infrared imager 122 faces the notch of the receiving groove 121.

[0055] The drill rod 11 and the drill bit 13 are respectively arranged at both ends of the connecting head 12.

[0056] When detecting an underground gasification cavity, the staff can drill the mobile measurement component 1 in the underground gasification cavity data acquisition device from the side wall of the borehole;

[0057] The drill bit 13 is used to drill in a nearly horizontal posture. During the drilling process, the infrared imager 122 can monitor the temperature information in the drilling path in real time, realizing mobile temperature monitoring.

[0058] Since the temperature inside the underground gasification cavity is different from the temperature at other locations underground (the temperature of the gasification cavity is about 1000°C higher than the temperature at other locations), the mobile temperature monitoring of the infrared imager 122 can be used to monitor this temperature difference, so as to obtain the planar position distribution of the underground gasification cavity, making the detection of the underground gasification cavity simpler and more convenient.

[0059] It should be noted that the above-mentioned drill bit 13 drilling in a near-horizontal posture means that the drilling path of the drill bit 13 is not necessarily completely parallel to the horizontal plane, and the angle between the axis of the drilling path and the horizontal plane can have a difference range of ±10° to reduce the difficulty of detecting underground gasification cavities.

[0060] Optimally, the drill rod 11 includes a plurality of universal joints 111, see Figure 2 and Figure 3 ;in,

[0061] The universal joint 111 is provided with a perforation inside, the axis of the perforation being parallel to the axis of the universal joint 111. Multiple universal joints 111 are connected in sequence, so that the head and tail of the drill rod 11 can swing relative to each other, so that the position of the drill bit 13 can be adjusted through the drill rod 11, making drilling by the drill bit 13 more convenient and smooth, and all the perforations are connected to form a sealed fluid channel 112;

[0062] A flushing channel 131 is provided on the drill bit 13, and the fluid channel 112 is connected to the flushing channel 131. Water can flow out from the flushing channel 131 through the fluid channel 112 to flush the channel drilled by the drill bit 13, so that the drill bit 13 can drill forward easily.

[0063] It should be noted that, in this embodiment, the axis of the through hole coincides with the axis of the universal joint 111, see Figure 3 .

[0064] Optimally, a fluidic head 123 for cutting the measuring channel is provided on the side wall of the connector 12, and the fluid channel 112 is connected to the fluidic head 123, see Figure 2 and Figure 4 ;

[0065] A cavity is provided in the connector 12, and an opening and closing assembly 3 for opening / closing the flushing channel 131 is provided in the cavity;

[0066] The staff can close the flushing channel 131 through the opening and closing component 3 to increase the water pressure in the cavity and spray it out through the jet head 123. The jet head 123 is used to construct a measurement channel. The measuring channel can reduce the thickness of the rock between the infrared imager 122 and the underground gasification cavity, so as to improve the effectiveness and accuracy of the temperature measurement of the infrared imager 122.

[0067] Optimized, the above-mentioned opening and closing assembly 3 includes a first motor 31, a moving plate 32 and a fixed plate 33, see Figure 2 and Figure 6 ;in,

[0068] The movable disc 32 is sealed and rotatably disposed in the cavity. The actuating end of the first motor 31 is transmission-connected to the movable disc 32. The movable disc 32 is provided with a first hole.

[0069] The fixed plate 33 is sealed and fixed in the cavity, and the fixed plate 33 is attached to the side of the moving plate 32 away from the first motor 31. The second hole is provided at the position of the fixed plate 33 corresponding to the first hole.

[0070] When a measuring channel needs to be opened, the staff can control the first motor 31 to drive the movable disk 32 to rotate, so that the first hole body and the second hole body are completely offset, so that the water pressure in the cavity increases and can only be ejected outward by the jet head 123. The high-pressure water ejected by the jet head 123 completes the opening of the measuring channel;

[0071] When the drilled channel needs to be cleaned, the staff only needs to control the first motor 31 to drive the movable disk 32 to rotate, so that the first hole body is connected to the second hole body, so that the water in the cavity can flow out through the first hole body, the second hole body and the flushing channel 131 in turn to complete the flushing of the drilled channel.

[0072] It should be noted that the control method of the first motor 31 can be remote control. This type of technology is existing technology and is relatively simple for those skilled in the art, so it will not be described in detail here.

[0073] Optimally, the outer wall of the connector 12 is sleeved with two expandable and contractible sealing rings 124 , the fluid supply device is connected to the sealing rings 124 through a pipeline, and the jet head 123 is arranged between the two sealing rings 124 .

[0074] It should be noted that the fluid supply device can be a gas supply device (air compressor, etc.) or a liquid supply device (hydraulic press, etc.), that is, by inputting fluid into the sealing ring 124 to make it fill and expand, it can be able to seal the through hole drilled by the drill bit 13; and when it shrinks to the point where it needs to release pressure through the gas supply device or the liquid supply device, the sealing ring 124 will shrink.

[0075] Optimally, a suction port is further provided on the side wall of the connector 12, and the suction port is provided between the two sealing rings 124;

[0076] The fluid channel 112 is provided with a suction pipe 113 and a driving roller 114 for driving the suction pipe 113 to extend / contract;

[0077] Before using the infrared imager 122 to measure temperature, the jet hole construction action needs to be repeated multiple times. The jet hole construction action includes the following steps:

[0078] Controlling the sealing ring 124 to expand;

[0079] The jet head 123 is used to perform hydraulic cutting for a period of time to construct a hole body by hydraulic cutting. During this process, the water in the hole body gradually increases and fills the hole body and the space between the sealing ring 124. At this time, the water ejected from the jet hole cannot form a cutting force.

[0080] As the water body increases further, the water pressure in the pore body gradually increases, and at this time the water body can be used to fracture the pore body;

[0081] Finally, stop hydraulic cutting and fracturing;

[0082] The suction end of the suction pipe 113 is extended from the suction port by the driving roller 114 to suck and recover the water between the two sealing rings 124;

[0083] Subsequently, the suction tube 113 is reset (retracted back into the connector 12) by using the driving roller 114;

[0084] At this time, cracks have been formed in the hole body, which is conducive to storing more water when the hole body is further extended using the jet head 123, extending the depth of the single extension hole body, and ensuring that the length of the extended hole body can be increased.

[0085] It should be noted that if the jet drilling is achieved only by the jet head 123, the drilling depth is often shallow. The reason is that during the jet drilling process, the hole is gradually filled with water, which will hinder the progress of the jet drilling.

[0086] In this embodiment, before using the infrared imager 122 to measure the temperature, repeatedly performing the jet hole construction action can increase the drilling depth;

[0087] The driving roller 114 is driven by a motor, and the motor can also be controlled by the remote control method mentioned above.

[0088] Optimally, the drill bit 13 is provided with a cylinder 132, see Figure 2 and Figure 5 ;in,

[0089] A stopper 133 is slidably provided in the cylinder body 132. A through hole is provided on the side wall of the drill bit 13 corresponding to the position of the stopper 133 to facilitate the extension / contraction of the stopper 133. A receiving tray is provided at the bottom of the cylinder body 132, and a receiving hole is provided on the receiving tray that is connected to the cylinder body 132.

[0090] The above-mentioned opening and closing assembly 3 also includes a blocking disk 34, which is arranged at the action end of the first motor 31 and is located on the side of the fixed plate 33 away from the first motor 31. The blocking disk 34 has an unsealing hole at a position corresponding to the receiving hole, and the fixed plate 33 has a third hole at a position corresponding to the first hole, and the second hole is separated from the third hole.

[0091] During normal drilling, the third hole body is completely offset from the first hole body, and the unsealing hole and the receiving hole are also completely offset, so that water cannot enter the cylinder body 132;

[0092] When the drilling direction of the drill bit 13 needs to be adjusted, the third hole body is coaxial with the first hole body, the unsealing hole is coaxial with the receiving hole, and the water can enter the cylinder body 132 through the first hole body, the third hole body, the unsealing hole and the receiving hole in sequence, and the squeezing abutment 133 extends to the outside of the drill bit 13, and the abutment 133 abuts on the side wall of the hole body, causing the head of the drill bit 13 to shift to achieve adjustment of the drilling direction.

[0093] It should be noted that the direction of the abutment 133 can be adjusted by rotating the drill bit 13, so that the adjustment of the drilling direction of the drill bit 13 is more convenient.

[0094] Optimally, the connector 12 is provided with a second motor 125, see Figure 4 , the second motor 125 is transmission-connected to the infrared imager 122;

[0095] A seal 126 that matches the notch of the accommodating groove 121 is provided on the back side of the infrared imager 122 , and the second motor 125 can drive the infrared imager 122 to rotate;

[0096] When mobile temperature monitoring is required, the staff can control the second motor 125 to rotate so that the detection surface of the infrared imager 122 faces the notch of the accommodating tank 121 to obtain more accurate temperature information;

[0097] When mobile temperature monitoring is not required, the staff can control the second motor 125 to rotate so that the detection surface of the infrared imager 122 faces the bottom of the accommodating tank 121. At this time, the seal 126 on the infrared imager 122 just blocks the notch of the accommodating tank 121 to prevent soil or water from entering the accommodating tank 121, thereby protecting the infrared imager 122.

[0098] It should be noted that the back side of the infrared imager 122 mentioned above refers to the side of the infrared imager 122 that is away from its detection surface, and the detection surface of the infrared imager 122 is parallel to the plane where the back side of the infrared imager 122 is located;

[0099] The second motor 125 can also be controlled by the aforementioned remote control operation.

[0100] Optimally, the above-mentioned underground gasification cavity data acquisition device further includes a guide 2, see Figure 1 ;

[0101] The guide 2 is set in the vertical drill hole. The side wall of the guide 2 is provided with a guide opening for the mobile measuring component 1 to extend out. The above-mentioned mobile measuring component 1 can drill into the ground through the guide opening of the guide 2.

[0102] It needs to be explained that, in this embodiment, the mobile measuring component 1 passes through the horizontal guide port of the guide 2 and drills in a nearly horizontal posture. During the drilling process in a nearly horizontal posture, mobile temperature monitoring can be realized, and the planar position distribution of the underground gasification cavity can be obtained through mobile temperature monitoring.

[0103] Once again, the above-mentioned "near-horizontal drilling" does not simply refer to a state close to horizontal, but also includes a completely horizontal state, and the angle range of the drilling process is ±10°.

[0104] Optimally, the above-mentioned underground gasification cavity data acquisition device further includes a comprehensive monitoring component for measuring the temperature, pressure, flow rate and gas composition of the produced gas;

[0105] The comprehensive monitoring component is arranged at the exhaust port of the underground gasification cavity.

[0106] It should be noted that the integrated monitoring component includes a variety of sensors, such as temperature sensors and flow sensors, which can measure the temperature, pressure, flow rate and gas composition of the output gas in the underground gasification cavity;

[0107] The temperature, pressure, flow rate and gas composition of the underground gasification cavity can be used to infer the volume and combustion state of the underground gasification cavity using existing mathematical models (existing technology);

[0108] According to the volume of the gasification cavity and the plane distribution of the underground gasification cavity, the vertical span of the underground gasification cavity can be roughly known, so as to obtain more relevant data of the underground gasification cavity.

[0109] Example 2:

[0110] A method for acquiring underground gasification cavity data is implemented by the underground gasification cavity data acquisition device described in Example 1, and includes the following steps:

[0111] The mobile measuring assembly 1 is drilled from the side wall of the vertical borehole, see Figure 1 and Figure 2 During the drilling process, the infrared imager 122 is used to measure the temperature downward to obtain the plane distribution of the underground gasification cavity.

[0112] Since the temperature inside the underground gasification cavity is different from the temperature at other locations underground (the temperature of the gasification cavity is about 1000°C higher than the temperature at other locations), the mobile temperature monitoring of the infrared imager 122 can be used to monitor this temperature difference, so as to obtain the planar position distribution of the underground gasification cavity, making the detection of the underground gasification cavity simpler and more convenient.

[0113] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An underground gasification cavity data acquisition device, characterized in that: The invention comprises a mobile measuring component (1); The mobile measurement assembly (1) comprises a drill rod (11), a drill bit (13) and a connector (12); wherein, A receiving groove (121) is provided on the side wall of the connector (12), an infrared imager (122) is provided in the receiving groove (121), and a detection surface of the infrared imager (122) is arranged toward the notch of the receiving groove (121); The drill rod (11) and the drill bit (13) are respectively arranged at two ends of the connector (12).

2. The underground gasification cavity data acquisition device according to claim 1, characterized in that: The drill rod (11) includes a plurality of universal joints (111); A perforation is provided inside the universal joint (111), the axis of the perforation being parallel to the axis of the universal joint (111), a plurality of the universal joints (111) being connected in sequence, and all the perforations being connected to form a sealed fluid channel (112); The drill bit (13) is provided with a flushing channel (131), and the fluid channel (112) is in communication with the flushing channel (131).

3. The underground gasification cavity data acquisition device according to claim 2, characterized in that: A jet head (123) for cutting a measuring channel is provided on a side wall of the connector (12), and the fluid channel (112) is in communication with the jet head (123); A cavity is provided in the connector (12), and an opening and closing assembly (3) for opening / closing the flushing channel (131) is provided in the cavity.

4. The underground gasification cavity data acquisition device according to claim 3, characterized in that: The opening and closing assembly (3) comprises a first motor (31), a moving disc (32) and a fixed disc (33); The movable disc (32) is arranged in a sealed and rotatable manner in the cavity, the action end of the first motor (31) is in transmission connection with the movable disc (32), and a first hole is provided on the movable disc (32); The fixed disk (33) is sealed and fixedly arranged in the cavity, and the fixed disk (33) is attached to a side of the movable disk (32) away from the first motor (31), and a second hole is provided on the fixed disk (33) at a position corresponding to the first hole.

5. The underground gasification cavity data acquisition device according to claim 4, characterized in that: The outer wall of the connector (12) is sleeved with two expandable and contractible sealing rings (124); a fluid supply device is connected to the sealing rings (124) via a pipeline; and the jet head (123) is arranged between the two sealing rings (124).

6. The underground gasification cavity data acquisition device according to claim 5, characterized in that: A suction port is also provided on the side wall of the connector (12), and the suction port is provided between the two sealing rings (124); The fluid channel (112) is provided with a suction pipe (113) and a driving roller (114) for driving the suction pipe (113) to extend / contract; When it is necessary to suck the liquid between the two sealing rings (124), the driving roller (114) drives the suction end of the suction tube (113) to extend out of the suction port to perform the suction work.

7. The underground gasification cavity data acquisition device according to claim 6, characterized in that: A cylinder (132) is provided in the drill bit (13); a stopper (133) is slidably provided in the cylinder (132); a through hole is provided on the side wall of the drill bit (13) at a position corresponding to the stopper (133) to facilitate the extension / contraction of the stopper (133); a receiving tray is provided at the bottom of the cylinder (132); and a receiving hole is provided on the receiving tray to communicate with the cylinder (132); The opening and closing assembly (3) further comprises a blocking disk (34), the blocking disk (34) being arranged at the action end of the first motor (31), and the blocking disk (34) being located on a side of the fixed disk (33) away from the first motor (31), the blocking disk (34) being provided with an unsealing hole at a position corresponding to the receiving hole, the fixed disk (33) being provided with a third hole at a position corresponding to the first hole, and the second hole being separated from the third hole; When the third hole body is coaxial with the first hole body, the unsealing hole is coaxial with the receiving hole, and liquid can enter the cylinder body (132) through the first hole body, the third hole body, the unsealing hole and the receiving hole in sequence, squeezing the abutment (133) to extend outward from the drill bit (13).

8. The underground gasification cavity data acquisition device according to claim 1, characterized in that: A second motor (125) is provided in the connector (12), and the second motor (125) is transmission-connected to the infrared imager (122); A sealing member (126) adapted to the notch of the accommodating groove (121) is provided on the back side of the infrared imager (122), and the second motor (125) can drive the infrared imager (122) to rotate so that the detection surface of the infrared imager (122) faces the notch of the accommodating groove (121) or the sealing member (126) blocks the notch of the accommodating groove (121).

9. The underground gasification cavity data acquisition device according to any one of claims 1 to 8, characterized in that: The underground gasification cavity data acquisition device further includes a guide (2); The guide (2) is arranged in a vertical drill hole, and a guide opening is provided on a side wall of the guide (2) for facilitating the extension of the mobile measuring component (1).

10. The underground gasification cavity data acquisition device according to claim 9, characterized in that: The underground gasification cavity data acquisition device also includes a comprehensive monitoring component for measuring the temperature, pressure, flow rate and gas composition of the produced gas; The comprehensive monitoring component is arranged at the exhaust port of the underground gasification cavity.

11. A method for acquiring underground gasification cavity data, characterized in that: The method is implemented by the underground gasification cavity data acquisition device according to any one of claims 1 to 10, and the method comprises the following steps: The mobile measurement component (1) drills from the side wall of the vertical borehole in a nearly horizontal direction, and during the drilling process, the infrared imager (122) is used to measure the temperature downward to obtain the plane distribution of the underground gasification cavity.

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