Bimodal monitoring system and monitoring method for drilling gas

Abstract

The invention discloses a bimodal monitoring system and a bimodal monitoring method for drilling gas. The bimodal monitoring system comprises a plurality of bimodal monitoring modules, the bimodal monitoring modules are arranged at drill hole gas measuring points, and each bimodal monitoring module comprises a gas concentration monitoring sub-module and a gas flow monitoring sub-module; the transmission channel is arranged below the bimodal monitoring module, the transmission channel is communicated with a gas outlet of the bimodal monitoring module, the transmission channel further comprises a data transmission line, and the data transmission line is connected with the gas concentration monitoring sub-module and the gas flow monitoring sub-module; the data processing module is connected with the data transmission line; and the display module is connected with the data processing module. Gas capacitance values of different drill hole gas measuring points are obtained according to the gas concentration monitoring sub-module, then the gas concentration is obtained, and multi-data measurement of the gas concentration is achieved; temperature control is achieved through the gas flow monitoring sub-module, and accuracy and stability of measurement results are ensured.

Description

Technical Field

[0001] This invention relates to the field of underground coal mine drilling technology, and in particular to a dual-modal monitoring system and method for borehole gas. Background Technology

[0002] Coal is my country's primary energy source, and over 20% of China's mines are coal and gas outburst mines. Gas borehole drainage is an effective way to prevent gas disasters and promote gas utilization. In recent years, with the development of directional drilling technology, the new technology of long borehole gas drainage has been gradually promoted. Long boreholes have the advantages of large drainage volume fraction and long drainage time. However, due to the excessive length of the borehole, there will be negative pressure attenuation during gas flow, which will also affect the gas flow around the borehole, thus affecting the continuous and efficient drainage of gas. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] In view of this, the present invention provides a dual-mode monitoring system and method for borehole gas, wherein the dual-mode monitoring system can obtain the gas capacitance value of different borehole gas measuring points according to the gas concentration monitoring submodule, and then obtain the gas concentration, thereby realizing multi-data measurement of gas concentration; the gas flow monitoring submodule realizes temperature control to ensure the accuracy and stability of the measurement results.

[0005] Specifically, the following technical solutions are included:

[0006] An embodiment of the first aspect of the present invention provides a dual-modal monitoring system for borehole gas, the dual-modal monitoring system comprising:

[0007] A dual-modal monitoring module, wherein multiple dual-modal monitoring modules are installed at borehole gas measuring points, and the dual-modal detection module includes a gas concentration monitoring sub-module and a gas flow monitoring sub-module;

[0008] A transmission channel is located below the dual-modal monitoring module and is connected to the gas outlet of the dual-modal monitoring module. The transmission channel also includes a data transmission line, which is connected to the gas concentration monitoring submodule and the gas flow monitoring submodule, respectively.

[0009] The data processing module is connected to the data transmission line;

[0010] The display module is connected to the data processing module.

[0011] Optionally, the dual-modal monitoring system further includes:

[0012] A protective damping layer is provided, at least a portion of which is disposed at the end of the dual-mode monitoring module away from the transmission channel, and at least a portion of which is connected to the transmission channel;

[0013] The protective damping layer includes:

[0014] The shock-absorbing layer body is disposed on the side of the dual-modal monitoring module away from the transmission channel, and a mineral environment protection coating is provided on the side of the shock-absorbing layer body opposite to the dual-modal monitoring module.

[0015] The top seat is fixedly connected to the damping layer body, and the top seat is located on the side of the damping layer body facing the dual-modal monitoring module;

[0016] Telescopic support column, wherein the telescopic ends of multiple telescopic support columns are fixedly connected to the top seat, and the fixed ends of the telescopic support columns are provided with hooks, which are fixedly connected to the transmission channel.

[0017] Optionally, the dual-modal monitoring module further includes a filter layer assembly disposed on the side of the gas concentration monitoring submodule and the gas flow monitoring submodule opposite to the transmission channel, the filter layer assembly comprising:

[0018] A first support frame is provided with a first air inlet, which is located away from the transmission channel. A first air outlet, a second air outlet, and a third air outlet are provided on the side of the first support frame opposite to the first air inlet.

[0019] The filter membrane and the pores are arranged in multiple layers within the first support frame. The pores are formed on the filter membrane.

[0020] Optionally, the gas concentration monitoring submodule includes:

[0021] The second support frame is disposed below the first support frame, and the second support frame is provided with a second air inlet, which is connected to the second air outlet. A fourth air outlet is provided on the side of the second support frame opposite to the second air inlet.

[0022] The gas monitoring unit is installed within the second support frame;

[0023] The first data transmission unit is electrically connected to the gas monitoring unit, and the first data transmission unit is connected to the data transmission line;

[0024] The first power supply unit is connected to both the gas monitoring unit and the first data transmission unit.

[0025] Optionally, the gas monitoring unit includes: an insulating shaft, a first curved electrode plate, a second curved electrode plate, and a first insulating electrode plate, wherein the first curved electrode plate, the first insulating electrode plate, and the second curved electrode plate are connected in sequence, and the first curved electrode plate, the first insulating electrode plate, and the second curved electrode plate are spirally wound around the outside of the insulating shaft.

[0026] Optionally, the gas flow monitoring submodule includes:

[0027] A third support frame is disposed below the first support frame and is adjacent to the second support frame. The third support frame is provided with a third air inlet, which is connected to the third air outlet. A fifth air outlet is provided on the side of the third support frame opposite to the third air inlet.

[0028] A heating sensor is disposed within the third support frame;

[0029] A light temperature sensor is disposed within the third support frame, and the light temperature sensor is disposed adjacent to the heating sensor;

[0030] An adaptive temperature control integrated unit is connected to the heating sensor and the light temperature sensor, respectively.

[0031] The second data transmission unit is connected to the heating sensor, the light temperature sensor and the adaptive temperature control integrated unit respectively, and the second data transmission unit is also connected to the data transmission line;

[0032] The second power supply unit is configured to supply power to the heating sensor, the light temperature sensor, the adaptive temperature control integrated unit, and the second data transmission unit.

[0033] Optionally, the adaptive temperature control integrated unit includes a heating subunit, a heat dissipation subunit, and a coordination subunit, wherein the coordination subunit is connected to the heating subunit, the heat dissipation subunit, the heating sensor, and the light temperature sensor, respectively.

[0034] Optionally, the dual-modal monitoring system includes an air pump, and the transmission channel further includes a fourth air inlet and an air supply pipe. The fourth air inlet is connected to the air outlet of the dual-modal monitoring module, and the outlet of the air supply pipe is connected to the air pump. The transmission channel is also equipped with traction ropes, and multiple traction ropes are symmetrically arranged on both sides of the transmission channel. The outer wall of the transmission channel is provided with a protective layer made of an ultra-tough material.

[0035] Optionally, the data processing module includes: a gas concentration calculation module, a flow velocity negative pressure calculation module, and a temperature automatic controller. The processing module is connected to the borehole gas measuring point via a data transmission line. The gas concentration calculation module is connected to the gas concentration monitoring submodule. The flow velocity negative pressure calculation module is connected to the gas flow monitoring submodule. The temperature automatic controller is connected to the gas flow monitoring submodule.

[0036] A second aspect of the present invention provides a dual-modal monitoring method for borehole gas, utilizing the aforementioned dual-modal monitoring system. The dual-modal monitoring method includes the following steps:

[0037] The dual-modal monitoring system was activated, extracting methane gas from multiple borehole gas monitoring points.

[0038] The gas enters the gas concentration monitoring submodule and the gas flow monitoring submodule respectively;

[0039] Based on the gas concentration monitoring submodule and the gas flow monitoring submodule, the monitoring data of the gas is obtained;

[0040] The monitoring data is transmitted to the data processing module to obtain the concentration, flow rate, and pressure of the gas.

[0041] The concentration, flow rate, and pressure are displayed on the display module and then analyzed.

[0042] The present invention provides a dual-modal monitoring system and method for borehole gas. The dual-modal monitoring system includes a dual-modal monitoring module installed at the borehole gas measuring point. This module comprises a gas concentration monitoring submodule and a gas flow monitoring submodule. The gas concentration monitoring submodule acquires the gas capacitance values ​​at different borehole gas measuring points, thereby obtaining the gas concentration and achieving multi-data measurement of gas concentration. The gas flow monitoring submodule controls the temperature, ensuring the accuracy and stability of the measurement results. The dual-modal monitoring system also includes a transmission channel, a data processing module, and a display module. Monitoring data from the gas concentration and flow monitoring submodules are transmitted to the data processing module via the data transmission line of the transmission channel. The data processing module calculates the data and displays the results on the display module, improving the convenience of data acquisition.

[0043] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of a dual-mode monitoring system for borehole gas according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram showing the installation location of a dual-modal monitoring module according to an embodiment of the present invention;

[0047] Figure 3 This is an internal schematic diagram of a dual-modal monitoring module according to an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of a filter layer assembly according to an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of a gas concentration monitoring submodule according to an embodiment of the present invention;

[0050] Figure 6 This is a schematic diagram of a gas monitoring unit according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of a gas flow monitoring submodule according to an embodiment of the present invention;

[0052] Figure 8 This is a schematic diagram of an adaptive temperature control integrated unit according to an embodiment of the present invention;

[0053] Figure 9 This is a schematic diagram of a transmission channel according to an embodiment of the present invention.

[0054] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0055] 100 Dual-modal monitoring system, 1 Protective damping layer, 11 Mine environment protection coating, 12 Damping layer body, 13 Top base, 14 Telescopic support column, 15 Hook, 2 Dual-modal monitoring module, 21 Filter layer assembly, 211 First air inlet, 212 Filter membrane, 213 Air pores, 214 First air outlet, 215 Second air outlet, 216 Third air outlet, 22 Gas concentration monitoring submodule, 221 Second air inlet, 222 Gas detection unit, 2221 First curved electrode plate, 2222 Second curved electrode plate, 2223 First insulating electrode plate, 2224 Insulating shaft, 2225 Monitoring channel, 223 First power supply unit, 224 First data transmission unit. 225 Fourth air outlet, 23 Gas flow monitoring submodule, 231 Third air inlet, 232 Heating sensor, 233 Light temperature sensor, 234 Adaptive temperature control integrated unit, 2341 Heating subunit, 2342 Heat dissipation subunit, 2343 Coordination subunit, 235 Second power supply unit, 236 Second data transmission unit, 237 Fifth air outlet, 3 Transmission channel, 31 Protective layer, 32 Fourth air inlet, 33 Gas delivery pipe, 34 Traction rope, 35 Data transmission line, 4 Data processing module, 41 Gas concentration calculation module, 42 Flow rate and negative pressure calculation module, 43 Automatic temperature controller, 5 Concentration display, 6 Flow rate and negative pressure display, 7 Air pump. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] Before providing a further detailed description of the embodiments of the present invention, the directional terms used in the embodiments of the present invention, such as "upper part", "lower part" and "side part", are not intended to limit the scope of protection of the present invention.

[0058] To make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0059] Figure 1 This is a schematic diagram of a dual-mode monitoring system for borehole gas according to an embodiment of the present invention.

[0060] like Figure 1 As shown, one embodiment of the present invention provides a dual-modal monitoring system 100 for borehole gas, the dual-modal monitoring system 100 comprising:

[0061] Dual-modal monitoring module 2, multiple dual-modal monitoring modules 2 are set at the borehole gas measuring points, the dual-modal detection module 2 includes a gas concentration monitoring sub-module 22 and a gas flow monitoring sub-module 23;

[0062] The transmission channel 3 is located below the dual-modal monitoring module 2 and is connected to the gas outlet of the dual-modal monitoring module 3. The transmission channel 3 also includes a data transmission line 35, which is connected to the gas concentration monitoring sub-module 22 and the gas flow monitoring sub-module 23 respectively.

[0063] Data processing module 4 is connected to data transmission line 35;

[0064] The display module is connected to the data processing module 4.

[0065] The dual-modal monitoring system 100 includes a dual-modal monitoring module 2, which is installed at multiple borehole gas measuring points. The dual-modal monitoring module 2 includes a gas concentration monitoring submodule 22 and a gas flow monitoring submodule 23. It can obtain the gas capacitance value at different borehole gas measuring points based on the gas concentration monitoring submodule 22, thereby obtaining the gas concentration and achieving multi-data measurement of gas concentration. The gas flow monitoring submodule 23 controls the temperature to ensure the accuracy and stability of the measurement results. The dual-modal monitoring system 100 also includes a transmission channel 3, a data processing module 4, and a display module. The monitoring data from the gas concentration monitoring submodule 22 and the gas flow monitoring submodule 23 are transmitted to the data processing module 4 via the data transmission line 35 of the transmission channel 3. The calculation results from the data processing module 4 are then displayed on the display module, improving the convenience of data acquisition.

[0066] Specifically, a dual-mode monitoring module 2 and a transmission channel 3 can be installed at each borehole gas measuring point. An air extraction pump 7 is located outside the mine and connected to the transmission channel 3. The air extraction pump 7 extracts methane gas from the borehole gas measuring point. The methane gas passes through the dual-mode monitoring module 2 and the transmission channel 3. As the methane gas passes through the dual-mode monitoring module 2, the methane concentration monitoring submodule 22 within the dual-mode monitoring module 2 monitors the methane capacitance and transmits this data to the external data processing module 4 to calculate the methane concentration. Simultaneously, the methane flow rate monitoring submodule 23 acquires the methane flow rate. In this application, the methane flow rate monitoring submodule 23 calculates the flow rate based on the "temperature difference," and temperature control is the core means to ensure that this temperature difference signal is not affected by environmental interference. The data processing module 4 calculates the flow rate and displays the methane concentration and flow rate on the display module for easy observation and subsequent processing by personnel. This design avoids the negative pressure attenuation during the methane gas extraction process from affecting the surrounding methane flow, ensuring continuous and efficient methane gas extraction. In other words, the dual-modal monitoring system 100 of this application sets up "multiple dual-modal monitoring modules 2" distributed at different gas measuring points in a long borehole (rather than a single monitoring point). Each dual-modal monitoring module 2 includes a gas concentration monitoring submodule 22 and a gas flow monitoring submodule 23. Through multi-point synchronous monitoring, gas concentration, flow rate, and pressure data at different locations within the borehole can be acquired in real time, enabling precise positioning and overcoming the limitation of traditional single monitoring points in comprehensively reflecting the gas state within a long borehole. Simultaneously, the transmission channel 3 includes a gas delivery pipe 33, a protective layer 31, and a data transmission line 35, ensuring stable gas transmission during gas extraction and transmitting multi-point monitoring data back to the data processing module 4 in real time. Operators can intuitively obtain changes in parameters at each measuring point through the display module 5, adjusting the extraction strategy to ensure continuous and efficient gas extraction from the long borehole. This also avoids the negative pressure attenuation during gas extraction affecting the surrounding gas flow.

[0067] It should be noted that dual-mode refers to the simultaneous presence of two monitoring modes in the dual-mode monitoring system 100: gas concentration monitoring and gas flow rate monitoring. Existing single-parameter monitoring has limitations. During gas extraction, monitoring only the concentration does not reveal the gas flow rate, making it difficult to determine extraction efficiency; conversely, monitoring only the flow rate does not reveal the actual gas concentration, making it difficult to assess whether the concentration exceeds the limit. Monitoring only the concentration or only the flow rate cannot fully reflect the true state of gas within the borehole.

[0068] Figure 2 This is a schematic diagram showing the installation location of a dual-modal monitoring module according to an embodiment of the present invention; Figure 3 This is an internal schematic diagram of a dual-modal monitoring module according to an embodiment of the present invention.

[0069] In one feasible implementation, such as Figure 2and Figure 3 As shown, the dual-modal monitoring system 100 also includes:

[0070] The protective damping layer 1 is at least partially disposed at the end of the dual-mode monitoring module 2 away from the transmission channel 3, and at least partially connected to the transmission channel 3.

[0071] Protective damping layer 1 includes:

[0072] The damping layer body 12 is located on the side of the dual-mode monitoring module 2 away from the transmission channel 3, and the side of the damping layer body 12 facing away from the dual-mode monitoring module 2 is provided with a mineral environment protection coating 11.

[0073] The top seat 13 is fixedly connected to the damping layer body 12, and the top seat 13 is located on the side of the damping layer body 12 facing the dual-mode monitoring module 2;

[0074] Telescopic support column 14, the telescopic ends of multiple telescopic support columns 14 are fixedly connected to the top seat 13, and the fixed ends of the telescopic support columns 14 are provided with hooks 15, which are fixedly connected to the transmission channel 3.

[0075] The top support 13 provides structural support for the mine shaft, better protects the dual-modal monitoring module 2 and the transmission channel 3, and improves the stability and reliability of the dual-modal detection module 2. It should be noted that a certain space is left between the top support 13 and the dual-modal detection module 2 to facilitate the dynamic operation of the telescopic support 14.

[0076] In this embodiment, the mine environment protection coating 11 is a wear-resistant and corrosion-resistant coating material, such as epoxy resin coating or polyurea coating, which can improve the anti-aging and anti-corrosion capabilities of the damping layer body 12. The main function of the damping layer body 12 is to buffer mine vibrations, and it uses materials with good elasticity and impact resistance, such as nitrile rubber, neoprene rubber, or polyurethane foam. The top seat 13 needs to bear the function of support and fixation, requiring high strength and rigidity. It is made of high-strength steel or cast iron and other metal materials, which can withstand the mine pressure and the force of the telescopic support 14 to ensure structural stability.

[0077] It should be noted that the telescopic support 14 is typically a hydraulic support, but can also be an electric telescopic rod, enabling relatively precise location determination of the borehole gas measuring point and accurate monitoring of the gas within that borehole section. The outer layer of the transmission channel 3 has graduated markings. When a specific borehole gas measuring point needs to be located (e.g., at 100m), the telescopic support 14 is extended or retracted, causing its top seat 13 to press firmly against the inner wall of the borehole, thus stably fixing the dual-mode monitoring module 2 at the target measuring point position according to the graduated markings. To switch measuring points, simply retract the current telescopic support 14 and extend the telescopic support 14 at the target position, achieving precise switching of the dual-mode monitoring module 2 between different measuring points. Generally, four or six hydraulic supports are used for support, symmetrically distributed at the connection between the top seat 13 and the transmission channel 3.

[0078] It is understandable that by setting up the protective damping layer 1, the vibrations from other mining operations in the mine can be prevented from affecting the operation of the dual-mode detection module 2 and the transmission channel 3. In other words, by setting up the protective damping layer 1, the accuracy and reliability of the monitoring data of the dual-mode monitoring system 100 can be guaranteed.

[0079] Figure 4 This is a schematic diagram of a filter layer assembly according to an embodiment of the present invention.

[0080] In one feasible implementation, such as Figure 4 As shown, the dual-modal monitoring module 2 also includes a filter layer assembly 21, which is disposed on the side of the gas concentration monitoring submodule 22 and the gas flow monitoring submodule 23 away from the transmission channel 3. The filter layer assembly 21 includes:

[0081] The first support frame is provided with a first air inlet 211, which is located away from the transmission channel 3. The first air inlet 211 is provided with a first air outlet 214, a second air outlet 215 and a third air outlet 216 on the side of the first support frame opposite to the first air inlet 211.

[0082] The filter membrane 212 and the pores 213 are arranged in the first support frame. The filter membrane 212 has pores 213 formed on it.

[0083] Typically, the filter layer assembly 21 is located on the side of the fixed end of the telescopic support 14 away from the transmission channel 3, to prevent the telescopic support 14 from affecting the operation of the dual-modal monitoring module 2 during its extension and retraction. The dual-modal monitoring module 2 is also equipped with the filter layer assembly 21, which can quickly and efficiently filter impurities such as water and coal particles in the extracted gas. It can also prevent the formation of water vapor through heat transfer between the filtered gas and the air in the mine, thus preventing damage to the dual-modal monitoring module 2 and extending its service life.

[0084] Specifically, the filter layer assembly 21 includes a first support frame, a first air inlet 211 and multiple air outlets disposed thereon. A second air outlet 215 is connected to the gas concentration monitoring submodule 22, and a third air outlet 216 is connected to the gas flow monitoring submodule 23. The first air outlet 214 is used to discharge water and impurities generated during filtration, ensuring the normal operation of subsequent monitoring submodules. The first support frame contains a filter membrane 212 and pores 213. The filter membrane 212 can be made of materials such as polytetrafluoroethylene, polypropylene, or polyester, and mainly filters liquid and solid impurities such as water and coal particles in the gas, preventing impurities from entering subsequent monitoring submodules and affecting measurement accuracy. The pores 213 are microstructures formed by the membrane material itself through a specific process. The pores 213 can further block or discharge tiny impurities that the filter membrane 212 does not completely trap. It should be noted that multiple layers of filter membranes 212 can be set to improve the filtration effect of the filter layer assembly 21, ensure the purity of the gas, and improve the accuracy of monitoring results.

[0085] Figure 5 This is a schematic diagram of a gas concentration monitoring submodule according to an embodiment of the present invention.

[0086] In one feasible implementation, such as Figure 5 As shown, the gas concentration monitoring submodule 22 includes:

[0087] The second support frame is located below the first support frame, and the second support frame is provided with a second air inlet 221. The second air inlet 221 is connected to the second air outlet 214, and a fourth air outlet 225 is provided on the side of the second support frame opposite to the second air inlet 221.

[0088] Gas monitoring unit 222 is installed within the second support frame;

[0089] The first data transmission unit 224 is electrically connected to the gas monitoring unit 222, and the first data transmission unit 224 is connected to the data transmission line 35.

[0090] The first power supply unit 223 is connected to the gas monitoring unit 222 and the first data transmission unit 224, respectively.

[0091] The gas concentration monitoring submodule 22 is designed to monitor the gas concentration information at borehole gas measuring points. Gas concentration is a core indicator of safe production in coal mines. Real-time monitoring of the gas concentration at each measuring point in the borehole allows for timely detection of any risks of excessive concentration (such as approaching the explosion threshold), providing direct data support for preventing gas explosions, poisoning, and other disasters, and ensuring safe mine operations. The concentration information reflects the gas occurrence status and extraction effect at different borehole measuring points. By analyzing the change pattern of concentration at each measuring point over time, it is possible to determine whether the gas has been effectively extracted during the extraction process and whether the extraction range is reasonable. Combined with parameters such as flow rate, the applicability of the current extraction strategy can also be evaluated, providing a basis for targeted adjustments to the extraction plan, ultimately achieving efficient and continuous gas extraction.

[0092] Figure 6 This is a schematic diagram of a gas monitoring unit according to an embodiment of the present invention.

[0093] In one feasible implementation, such as Figure 6 As shown, the gas monitoring unit 222 includes: an insulating shaft 2224, a first curved electrode plate 2221, a second curved electrode plate 2222, and a first insulating electrode plate 2223. The first curved electrode plate 2221, the first insulating electrode plate 2223, and the second curved electrode plate 2222 are connected in sequence, and the first curved electrode plate 2221, the first insulating electrode plate 2223, and the second curved electrode plate 2222 are spirally wound around the outside of the insulating shaft 2224.

[0094] The system includes a gas monitoring unit 222, which comprises a first curved electrode plate 2221 and a second curved electrode plate 2222 forming parallel upper and lower electrode plates, and forming a spiral monitoring channel 2225 with an insulating shaft 2224. This unit can acquire the capacitance value of gas at different borehole gas measuring points, and obtain the concentration of extracted gas based on the linear model correction method in the data processing module 4, thereby achieving high-precision measurement of gas concentration with multiple data points.

[0095] It should be noted that a first insulating electrode plate 2223 is provided between the first curved electrode plate 2221 and the second curved electrode plate 2222. The three are fitted together and spirally wound around the outside of the insulating shaft 2224 to form a monitoring channel 2225. The spiral path of the monitoring channel 2225 extends the gas detection length. A single-point airflow triggers multiple turns of the electrode for continuous measurement (acquiring n sets of capacitance values). By averaging, random errors are significantly suppressed, thereby achieving high-precision measurement of gas concentration with multiple data points.

[0096] Figure 7 This is a schematic diagram of a gas flow monitoring submodule according to an embodiment of the present invention.

[0097] In one feasible implementation, such as Figure 7 As shown, the gas flow monitoring submodule 23 includes:

[0098] The third support frame is located below the first support frame and is adjacent to the second support frame. The third support frame is provided with a third air inlet 231, which is connected to a third air outlet 216. A fifth air outlet 237 is provided on the side of the third support frame opposite to the third air inlet 231.

[0099] Heating sensor 232 is disposed within the third support frame;

[0100] The light temperature sensor 233 is disposed within the third support frame, and the light temperature sensor 233 is disposed adjacent to the heating sensor 232;

[0101] The adaptive temperature control integrated unit 234 is connected to the heating sensor 232 and the light temperature sensor 233 respectively;

[0102] The second data transmission unit 236 is connected to the heating sensor 232, the light temperature sensor 233 and the adaptive temperature control integrated unit 234 respectively. The second data transmission unit 236 is also connected to the data transmission line 35.

[0103] The second power supply unit 235 is configured to supply power to the heating sensor 232, the light temperature sensor 233, the adaptive temperature control integrated unit 234, and the second data transmission unit 236.

[0104] The gas flow monitoring submodule 23 can measure the flow rate of methane gas. Flow rate is a core indicator for measuring the efficiency of methane gas extraction. Combined with methane concentration, the actual extraction volume per unit time can be calculated. By analyzing the flow rate variation patterns at different borehole measuring points, it is possible to directly determine whether the methane gas in the area is being effectively extracted and whether the extraction intensity is reasonable. Abnormal fluctuations in flow rate (such as sudden increases or decreases) may indicate abnormal methane migration within the borehole (such as methane surges or channel blockages). Combined with concentration data, potential safety risks can be warned in advance, providing decision support for timely implementation of measures such as stopping mining and strengthening ventilation, thus ensuring mine operation safety.

[0105] It should be noted that the adaptive temperature control integrated unit 234 can achieve precise temperature control, ensuring the accuracy and stability of measurements. Flow monitoring is temperature-dependent; the flow characteristics of methane gas (such as flow rate and pressure) are closely related to its temperature, and temperature fluctuations in the mine environment directly interfere with the accuracy of flow measurement. Furthermore, the sensitivity of components such as the heating sensor 232 and the light temperature sensor 233 in the methane flow monitoring submodule 23 is also affected by temperature. Ambient temperature fluctuations can cause instability in the sensor's output signal, further amplifying measurement errors. The adaptive temperature control integrated unit 234 solves these problems. Through the coordinated operation of the heating subunit 2341, the heat dissipation subunit 2342, and the coordination subunit 2343, this unit can monitor the temperature within the methane flow monitoring submodule 23 in real time and dynamically adjust the heating or heat dissipation intensity, stabilizing the monitoring environment temperature within a suitable reference range, ultimately achieving accurate and long-term stable flow data.

[0106] Figure 8 This is a schematic diagram of an adaptive temperature control integrated unit according to an embodiment of the present invention.

[0107] In one feasible implementation, such as Figure 8 As shown, the adaptive temperature control integrated unit 234 includes a heating subunit 2341, a heat dissipation subunit 2342, and a coordination subunit 2343. The coordination subunit 2343 is connected to the heating subunit 2341, the heat dissipation subunit 2342, the heating sensor 232, and the light and temperature sensor 233, respectively.

[0108] The coordination subunit 2343 is the core control center, connected to the heating subunit 2341, the heat dissipation subunit 2342, the light temperature sensor 233, and the heating sensor 232. The coordination subunit 2343 receives real-time temperature data from the light temperature sensor 233 and sends control commands to the heating subunit 2341 and the heat dissipation subunit 2342 to control their start / stop and intensity adjustment. In operation, the light temperature sensor 233 continuously monitors the ambient temperature within the gas flow monitoring submodule 23 and transmits the data to the coordination subunit 2343. When the detected temperature is lower than the reference temperature required for flow measurement, the coordination subunit 2343 activates the heating subunit 2341 to raise the ambient temperature; when the temperature is higher than the reference temperature, the coordination subunit 2343 activates the heat dissipation subunit 2342 to lower the ambient temperature; if the temperature is within the reference range, the coordination subunit 2343 maintains its current state.

[0109] Specifically, the heating sensor 232 actively generates heat to form a stable local temperature field, providing a reference heat source for flow measurement. The light temperature sensor 233 is positioned adjacent to the heating sensor 232, monitoring the temperature around the heating sensor 232 in real time and transmitting the temperature data to the coordination subunit 2343 of the adaptive temperature control integrated unit 234. After receiving the temperature signal from the light temperature sensor 233, the coordination subunit 2343 in the adaptive temperature control integrated unit 234 compares it to a preset reference temperature. If the temperature deviates from the reference, it is adjusted through the heating subunit 2341 (heating up) or the heat dissipation subunit 2342 (cooling down).

[0110] Furthermore, the temperature difference data between the heating sensor 232 and the fiber optic temperature sensor 233 can be used to derive gas flow-related data. Heating timing: When the fiber optic temperature sensor 233 detects that the temperature around the heating sensor 232 is lower than a preset reference value, the coordination subunit 2343 triggers the heating subunit 2341 to operate, increasing the heating intensity of the heating sensor 232 and causing the local temperature to rise back to the reference value. The cooling timing is the opposite and will not be elaborated further.

[0111] Figure 9 This is a schematic diagram of a transmission channel according to an embodiment of the present invention.

[0112] In one feasible implementation, such as Figure 9 As shown, the dual-modal monitoring system 100 includes an air pump 7, and the transmission channel 3 also includes a fourth air inlet 32 ​​and an air delivery pipe 33. The fourth air inlet 32 ​​is connected to the air outlet of the dual-modal monitoring module 2, and the outlet of the air delivery pipe 33 is connected to the air pump 7. The transmission channel 3 is also equipped with a traction rope 34, and multiple traction ropes 34 are symmetrically arranged on both sides of the transmission channel 3. The outer wall of the transmission channel 3 is provided with a protective layer 31, which is made of an ultra-tough material.

[0113] The transmission channel 3 is fixedly connected to the hook 15 on the protective shock-absorbing layer 1. A protective layer 31 is provided on the outside of the transmission channel 3, and the protective layer 31 contains ultra-tough materials such as ultra-high molecular weight polyethylene, polyetheretherketone, aramid fiber, and glass fiber reinforced epoxy resin composite material, which provides impact protection for the transmission channel 3 and improves the stability and reliability of data and gas transmission. The gas delivery pipe 33 is located near the dual-modal monitoring module 2 of the transmission channel 3, and its top fourth air inlet 32 ​​is connected to the fourth air outlet 225 and the fifth air outlet 237, respectively. Traction ropes 34 are set on both sides of the transmission channel 3 to ensure the guided lowering of the transmission channel 3 during installation and to accurately position the transmission channel 3. The traction ropes 34 extend to the roadway at the borehole entrance. By pulling the traction ropes 34 outside the mine using the drilling rig, the transmission channel 3 is gradually lowered along the borehole axis using its tension. The outer layer of the transmission channel 3 has scale markings. The transmission channel 3 can resist external forces such as bottom stress and fluid impact, preventing it from shaking and maintaining its stability in the complex drilling environment of the mine. The data transmission line 35 is located below the transmission channel 3 and is connected to the first data transmission unit 224 and the second data transmission unit 236 respectively, transmitting the data monitored by the gas concentration monitoring submodule 22 and the gas flow monitoring submodule 23 to the data processing module 4 for processing and calculation.

[0114] It should be noted that ultra-tough materials refer to new types of materials with extremely high strength and toughness. Their microstructure achieves a dual breakthrough in strength and toughness through special design. When subjected to external forces, these materials can effectively resist fracture and absorb energy through plastic deformation, exhibiting excellent impact resistance.

[0115] In one feasible implementation, the data processing module 4 includes: a gas concentration calculation module 41, a flow velocity negative pressure calculation module 42, and a temperature automatic controller 43. The data processing module 4 is connected to the borehole gas measuring point through a data transmission line 35. The gas concentration calculation module 41 is connected to the gas concentration monitoring submodule 22, the flow velocity negative pressure calculation module 42 is connected to the gas flow monitoring submodule 23, and the temperature automatic controller 43 is connected to the gas flow monitoring submodule 23.

[0116] It should be noted that the gas concentration calculation module 41 is mainly connected to the first data transmission unit 224 of the gas concentration monitoring submodule 22, acquiring multiple sets of gas capacitance values ​​transmitted from the gas concentration monitoring submodule 22, and calculating the gas concentration data through the linear model correction method. The flow velocity and negative pressure calculation module 42 is mainly connected to the second data transmission unit 236 of the gas flow monitoring submodule 23, acquiring the flow-related signals monitored by the gas flow monitoring submodule 23 based on temperature changes, and deriving the gas flow velocity and corresponding negative pressure data by combining calculation models such as the ideal gas law. The automatic temperature controller 43 is mainly connected to the light temperature sensor 233 and the adaptive temperature control integrated unit 234 of the gas flow monitoring submodule 23. On the one hand, it receives real-time temperature data fed back by the light temperature sensor 233, and on the other hand, it sends control commands to the adaptive temperature control integrated unit 234 to realize dynamic control of the monitored ambient temperature. All three belong to the data processing module 4 and have internal collaborative relationships.

[0117] The data processing module 4 is connected to the dual-mode monitoring module 2 at the borehole gas measuring point via data transmission line 35. It acquires monitoring data from the gas concentration monitoring submodule 22 through the gas concentration calculation module 41 and calculates the gas concentration. It also acquires monitoring data from the gas flow monitoring submodule 23 through the flow velocity negative pressure calculation module 42 and calculates the gas flow rate. The data is ultimately displayed on the display module: the gas concentration is displayed on the concentration display 5, and the gas flow rate is displayed on the flow velocity negative pressure display 6. The automatic temperature controller 43 dynamically adjusts the ambient temperature to provide stable conditions for accurate gas flow measurement. The data processing module 4 of this application can control the operation of the dual-mode monitoring system 100 and is connected to the dual-mode detection modules 2 and transmission channels 3 at multiple borehole gas measuring points via the air extraction pump 7, enabling continuous extraction of gas from the borehole gas measuring points.

[0118] This application uses the telescopic support column 14 to precisely lock the position of the borehole gas measuring point. The inclusion of a protective damping layer 1 and a filter layer assembly 21 effectively ensures the stable operation of the dual-mode monitoring module 2. Simultaneously, the capacitive gas monitoring unit 222 measures the concentration of methane gas, and in conjunction with the adaptive temperature control integrated unit 234, it enables high-precision, multi-dimensional monitoring of borehole gas parameters, improving the accuracy and stability of data monitoring.

[0119] In the dual-mode monitoring system for borehole gas of this application, the spiral path of monitoring channel 2225 extends the gas detection length, and single-point airflow triggers continuous measurement of multiple electrodes (acquiring n sets of capacitance values). Random errors are significantly suppressed through averaging. The physical parameters of gas, such as flow rate and pressure, are closely related to temperature. Temperature fluctuations can cause changes in the density, flow rate, and other properties of gas, directly affecting the accuracy of flow measurement. A stable temperature environment can also reduce the sensor's own error and ensure the consistency of long-term measurements, thus guaranteeing the accuracy and stability of the results.

[0120] Another embodiment of the present invention provides a dual-modal monitoring method for borehole gas, utilizing the aforementioned dual-modal monitoring system. This dual-modal monitoring method includes the following steps:

[0121] The dual-modal monitoring system was activated, extracting methane gas from multiple borehole gas monitoring points.

[0122] The gas enters the gas concentration monitoring submodule and the gas flow monitoring submodule respectively;

[0123] Based on the gas concentration monitoring submodule and the gas flow monitoring submodule, gas monitoring data is obtained;

[0124] The monitoring data is transmitted to the data processing module to obtain the concentration, flow rate, and pressure of the gas.

[0125] After the concentration, flow rate, and pressure are displayed on the display module, analysis and research are conducted.

[0126] The monitoring data includes multiple capacitance values ​​obtained through the gas concentration monitoring submodule, as well as temperature, flow rate, and negative pressure values ​​obtained through the gas flow monitoring submodule. The dual-modal monitoring method of this application enables multi-data, multi-dimensional measurement of gas extraction, and displays the final calculation results on the display module, revealing the time-varying pattern of extracted gas concentration at different points, and evaluating the gas extraction effect.

[0127] The dual-modal monitoring method of this application sets up "multiple dual-modal monitoring modules" distributed at different gas measuring points in a long borehole (rather than a single monitoring point). Each dual-modal monitoring module includes a gas concentration monitoring sub-module and a gas flow monitoring sub-module. Through multi-point synchronous monitoring, gas concentration, flow rate, and pressure data at different locations within the borehole can be acquired in real time, enabling precise positioning and overcoming the limitation of traditional single-point monitoring, which cannot comprehensively reflect the gas state within a long borehole. Simultaneously, the transmission channel includes a gas delivery pipe, a protective layer, and a data transmission line to ensure stable gas transmission during gas extraction, while simultaneously transmitting multi-point monitoring data back to the data processing module in real time. Operators can intuitively obtain changes in parameters at each measuring point through the display module, adjusting the extraction strategy to ensure continuous and efficient gas extraction from the long borehole. This also avoids the negative pressure attenuation during gas extraction from affecting the surrounding gas flow.

[0128] It should be noted that dual-mode refers to the simultaneous presence of two monitoring modes in the monitoring system: gas concentration monitoring and gas flow rate monitoring. Existing single-parameter monitoring has limitations. During gas extraction, monitoring only the concentration does not reveal the gas flow rate, making it difficult to determine extraction efficiency; conversely, monitoring only the flow rate does not reveal the actual gas concentration, making it difficult to assess whether the concentration exceeds the limit. Monitoring only the concentration or only the flow rate cannot fully reflect the true state of gas within the borehole.

[0129] Example

[0130] The dual-modal detection module 2, transmission channel 3, and protective damping layer 1 of this application are placed at the borehole gas measuring point in the mine. The dual-modal monitoring system 100 is controlled by the data processing module 4. After operation, the telescopic support column 14 at the borehole gas measuring point is raised. The raising and lowering of the telescopic support column 14 can precisely select the measuring point position. For example, if only 100m is measured, only the telescopic support column at 100m needs to be opened, and the others can be closed. Multiple gas measuring points are preset at different depths in the borehole (such as 50m, 100m, 200m, etc.), and a set of telescopic support columns 14 is set at each measuring point. The core function of the telescopic support column 14 is not only "telescopic adjustment", but more importantly, it stabilizes and fixes the dual-modal monitoring module 2 at the current measuring point by "extending and pressing against the inner wall of the borehole". Its telescopic state directly determines whether the dual-modal monitoring module 2 is in the working position. Opening the telescopic support 14 at the 100m measurement point means that the telescopic support 14 at the 100m measurement point extends and presses against the inner wall of the borehole, firmly fixing the dual-mode monitoring module 2 at a depth of 100m at this location. This allows it to accurately monitor data such as the concentration and flow rate of methane gas at that measurement point (the module is in working condition at this time). The telescopic supports 14 at measurement points other than 100m (such as 50m, 200m, etc.) retract and do not participate in the monitoring of those measurement points. The outer layer of the transmission channel 3 has scale markings to further locate the position of the dual-mode monitoring module 2.

[0131] The gas supply pipe 33 is a core component of the transmission channel 3. Its end near the dual-modal monitoring module 2 is connected via the fourth air inlet 32 ​​to the fourth air outlet 225 and the fifth air outlet 237 of the dual-modal monitoring module 2. The dual-modal monitoring module 2 is directly connected to the gas at the borehole gas measuring point. In this design, the gas supply pipe 33 effectively functions as a connector between the borehole gas point and the extraction pump 7: the gas in the borehole first enters the dual-modal monitoring module 2 for monitoring, and then is extracted by the extraction pump 7 through the gas supply pipe 33. When the extraction pump 7 is turned on to extract borehole gas, the gas passes sequentially through the first inlet 211, filter membrane 212, and pores 213 of the filter layer assembly 21, and is discharged through the first outlet 214 to the third outlet 216. The filter membrane 212 filters out impurities such as water and coal particles from the gas. The pores 213 formed on the filter membrane 212 further filter out or discharge any small impurities not completely trapped by the filter membrane 212. These impurities then enter the second inlet 221 of the gas concentration monitoring submodule 22 and the third inlet 231 of the gas flow monitoring submodule 23, respectively. After entering the second air inlet 221, the gas passes through a spiral monitoring channel 2225 composed of a first curved electrode plate 2221, a second curved electrode plate 2222, and an insulating shaft 2224. This generates n sets of capacitance values, c1, c2, and c3. The spiral shape of the monitoring channel 2225 means that the electrode plates are not a single set of parallel plates, but rather multiple alternating "first curved electrode plate 2221 - first insulating electrode plate 2223 - second curved electrode plate 2222" units along the length of the insulating shaft 2224. Each spiral combination of electrode plates constitutes an independent capacitor. When the gas flows through the monitoring channel 2225 of the insulating shaft 2224, it capacitively couples with each independent electrode plate pair, and each pair outputs a corresponding capacitance value. Therefore, the combined action of multiple electrode units in the spiral structure generates n independent capacitance values, providing a multi-data basis for subsequent calculation of gas concentration using the linear model correction method, thus improving measurement accuracy. After being transmitted to the data transmission line 35 via the first data transmission unit 224, the data is then transmitted to the gas concentration calculation module 41. The average value cn of multiple capacitances is taken. The gas concentration calculation module 41 obtains the gas concentration extracted at different measuring points based on the linear model correction method (c = kφ) and transmits it to the concentration display 5 for display. In c = kφ, c is the capacitance value corresponding to the gas, measured by the gas monitoring unit 222 of the gas concentration monitoring submodule 22. k is the calibration coefficient. The average value cn is the average of n sets of capacitance values ​​at a single measuring point. Because the multiple sets of electrode plates (each spiral rotation is one set) of the spiral monitoring channel 2225 will generate n independent capacitance measurements (c1 to cn) of the gas at the same measuring point, taking the average can reduce random errors and improve the stability of the capacitance value at that measuring point (i.e., the average capacitance cn of a single measuring point).Sources of concentration at different measuring points: Independent dual-mode monitoring modules 2 are installed at different locations (such as 50m, 100m, 200m, etc.) within the long borehole. Each measuring point will repeat the above process - each will generate n sets of capacitance values, take the average to obtain cn for that measuring point, and then calculate the gas concentration φ for that measuring point using c = kφ.

[0132] Simultaneously, gas flows through the third inlet 231, and the heating sensor 232 begins to heat up, raising the temperature of the surrounding fluid and creating a temperature difference with the fiber optic temperature sensor 233. This temperature difference (used to derive gas flow rate data) is transmitted to the second data transmission unit 236. If the temperature of the gas flow monitoring submodule 23 changes, the automatic temperature controller 43 controls the coordination subunit 2343 to adjust the temperatures of the heating subunit 2341 and the heat dissipation subunit 2342, respectively. The acquired monitoring data (temperature difference data between the heating sensor 232 and the fiber optic temperature sensor 233, and gas flow rate data derived from this temperature difference) is transmitted to the flow rate negative pressure calculation module 42. Based on the ideal gas law, the flow rate is calculated using Q... m =ρvA calculates the gas flow rate at the measuring point, and the automatic temperature controller 43 accurately obtains the gas temperature. Then, the ideal gas law p = (q m The gas pressure at the measuring point is calculated using RT / (Mqv) and transmitted to the flow rate negative pressure display 6.

[0133] Q m =ρvA, Q m ρ refers to the mass flow rate of the gas, which is the final calculated target parameter, representing the mass of gas flowing through a certain cross-section per unit time. ρ refers to the density of the gas, ρ = PM / (RT), where pressure P (gas pressure inside the borehole) and temperature T (monitored by fiber optic temperature sensor 233) are measured values, R is the gas constant (a known fixed value), and M is the molar mass of gas, a known value. v refers to the flow velocity of the gas, calculated based on the temperature difference between heating sensor 232 and fiber optic temperature sensor 233. A refers to the cross-sectional area of ​​the gas flow channel, an inherent structural parameter of the gas delivery pipe 33 or monitoring channel in transmission channel 3, calculated from the channel's inner diameter (A = π(d / 2)²). The direct monitoring target of fiber optic temperature sensor 233 is the actual temperature of the gas (not just for calculating the temperature difference). The "temperature difference" is the difference between the heating sensor 232 (actively heating, temperature T2) and the fiber optic temperature sensor 233 (monitoring gas temperature T1) (ΔT = T2 - T1). This difference is only used to infer the gas flow rate.

[0134] In the calculation based on the temperature difference between the heating sensor 232 and the fiber optic temperature sensor 233, the heating sensor 232 and the fiber optic temperature sensor 233 together form a thermal flow meter, which can directly generate data. The automatic temperature controller 43 is used to avoid environmental interference with ΔT and ensure overall accuracy. The relationship between the temperature difference ΔT and the flow velocity v is described by King's Law:

[0135] Flow velocity v = [(Q / (k2A·ΔT)) - k1 / k2] 2

[0136] In the formula, Q is the heat loss power of the heating sensor; A is the surface area of ​​the heating sensor; k1 and k2 are calibration constants, which are related to the thermal conductivity, density, viscosity and sensor of the fluid.

[0137] It should be noted that p = (q m In RT / (Mqv), p refers to the pressure of the gas (unit: Pa or kPa), which is the target parameter calculated using this formula, representing the gas pressure at the measuring point. q m Qm refers to the mass flow rate of the gas (unit: kg / s), which is the mass flow rate of the gas at the measuring point calculated by Qm = ρvA (using the same parameter as Qm mentioned earlier). R refers to the gas constant (unit: J / (mol·K)), which is an inherent physical constant of gas (a known fixed value, such as R = 8.314 J / (mol·K) for methane-dominated gas). T refers to the thermodynamic temperature of the gas (unit: K), which is directly monitored by the fiber optic temperature sensor 233 (the actual monitored gas temperature is converted to units, such as T = 273.15 + t, where t is the Celsius temperature). M refers to the molar mass of the gas (unit: kg / mol), which is a known fixed value (M = 0.016 kg / mol for methane-dominated gas). qv refers to the volumetric flow rate of gas (unit: m3 / s), which can be calculated by the relationship between volumetric flow rate and velocity (qv=vA, where v is the gas velocity and A is the cross-sectional area of ​​the transmission channel), or derived from the relationship between mass flow rate and density (qv=qm / ρ).

[0138] Based on the data obtained from the concentration display 5 and the flow rate negative pressure display 6, the law of change of gas concentration at different borehole gas measuring points over time is obtained, which is used to evaluate the effect of gas extraction.

[0139] Gas Concentration Variation Pattern: The gas concentration monitoring submodule 23 can acquire real-time gas concentration data at different borehole gas measuring points. For example, the gas concentration may be high in the initial stage of extraction, and may gradually decrease as extraction progresses. By monitoring the gas concentration at different time points, a curve showing the change in gas concentration over time can be plotted, thus understanding the gas release pattern. In some cases, the gas concentration may fluctuate, which may be due to changes in geological conditions, the operating status of the extraction equipment, or the influence of mine ventilation conditions. By analyzing these fluctuations, the extraction strategy can be adjusted in a timely manner to optimize the extraction effect.

[0140] Gas Flow Rate Variation Pattern: The gas flow rate monitoring submodule 23 can monitor gas flow rate data in real time. Changes in flow rate reflect the flow state of gas during the extraction process. During extraction, the gas flow rate may gradually stabilize as extraction time increases. Abnormal changes in flow rate, such as a sudden increase or decrease, may indicate a malfunction in the gas extraction system or a change in geological conditions. By monitoring changes in gas flow rate and combining this with gas concentration data, the total amount of gas extracted can be calculated. This is crucial for evaluating the effectiveness of gas extraction and developing subsequent extraction plans.

[0141] Gas pressure variation patterns: Monitoring gas pressure reflects the pressure status of gas during the extraction process. Changes in gas pressure during extraction can affect gas flow velocity and extraction efficiency. For example, the gas pressure may be high at the beginning of extraction, gradually decreasing as extraction progresses. If the gas pressure is too low, it may slow down the gas flow velocity, affecting extraction efficiency. By monitoring changes in gas pressure, the operating parameters of the extraction equipment, such as the power of the air pump, can be adjusted in a timely manner to maintain the gas pressure within a suitable range, thereby improving extraction efficiency.

[0142] Improving gas extraction efficiency: The dual-mode monitoring system 100 can monitor gas concentration, flow rate, and pressure in real time, thereby achieving precise control of the gas extraction process. Based on the monitoring data, the operating parameters of the extraction equipment can be adjusted in a timely manner to improve gas extraction efficiency.

[0143] Ensuring the safety of gas extraction: Methane gas is a flammable and explosive gas, and changes in its concentration and pressure are crucial to mine safety. The dual-modal monitoring system 100 can monitor gas concentration and pressure in real time, promptly detecting situations where gas concentration exceeds standards or pressure is abnormal, allowing for appropriate measures such as stopping extraction or ventilation to ensure mine safety.

[0144] Optimizing gas drainage strategies: By analyzing the changing patterns of gas concentration, flow rate, and pressure, more optimized gas drainage strategies can be developed. For example, based on the changing patterns of gas concentration, the optimal drainage time and depth can be determined; based on the changing patterns of gas flow rate, the operating parameters of the drainage equipment can be adjusted to improve drainage efficiency; and based on the changing patterns of gas pressure, the layout and operation of the drainage equipment can be optimized.

[0145] Extending equipment lifespan: The filter layer component 21 in the dual-modal monitoring system 100 effectively filters impurities in the gas, protecting the gas extraction equipment from corrosion and thus extending its lifespan. Simultaneously, by monitoring the gas concentration, flow rate, and pressure in real time, potential equipment malfunctions can be detected promptly, allowing for early maintenance and upkeep, further extending the equipment's lifespan.

[0146] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "a plurality" refers to two or more unless otherwise expressly defined.

[0147] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0148] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-mode monitoring system for borehole gas, characterized in that, The dual-modal monitoring system includes: A dual-modal monitoring module, wherein multiple dual-modal monitoring modules are installed at borehole gas measuring points, and the dual-modal detection module includes a gas concentration monitoring sub-module and a gas flow monitoring sub-module; A transmission channel is located below the dual-modal monitoring module and is connected to the gas outlet of the dual-modal monitoring module. The transmission channel also includes a data transmission line, which is connected to the gas concentration monitoring submodule and the gas flow monitoring submodule, respectively. The data processing module is connected to the data transmission line; The display module is connected to the data processing module.

2. The dual-mode monitoring system for borehole gas according to claim 1, characterized in that, The dual-modal monitoring system also includes: A protective damping layer is provided, at least a portion of which is disposed at the end of the dual-mode monitoring module away from the transmission channel, and at least a portion of which is connected to the transmission channel; The protective damping layer includes: The shock-absorbing layer body is disposed on the side of the dual-modal monitoring module away from the transmission channel, and a mineral environment protection coating is provided on the side of the shock-absorbing layer body opposite to the dual-modal monitoring module. The top seat is fixedly connected to the damping layer body, and the top seat is located on the side of the damping layer body facing the dual-modal monitoring module; Telescopic support column, wherein the telescopic ends of multiple telescopic support columns are fixedly connected to the top seat, and the fixed ends of the telescopic support columns are provided with hooks, which are fixedly connected to the transmission channel.

3. The dual-mode monitoring system for borehole gas according to claim 1, characterized in that, The dual-modal monitoring module further includes a filter layer assembly disposed on the side of the gas concentration monitoring submodule and the gas flow monitoring submodule away from the transmission channel. The filter layer assembly includes: A first support frame is provided with a first air inlet, which is located away from the transmission channel. A first air outlet, a second air outlet, and a third air outlet are provided on the side of the first support frame opposite to the first air inlet. The filter membrane and the pores are arranged in multiple layers within the first support frame. The pores are formed on the filter membrane.

4. The dual-mode monitoring system for borehole gas according to claim 3, characterized in that, The gas concentration monitoring submodule includes: The second support frame is disposed below the first support frame, and the second support frame is provided with a second air inlet, which is connected to the second air outlet. A fourth air outlet is provided on the side of the second support frame opposite to the second air inlet. The gas monitoring unit is installed within the second support frame; The first data transmission unit is electrically connected to the gas monitoring unit, and the first data transmission unit is connected to the data transmission line; The first power supply unit is connected to both the gas monitoring unit and the first data transmission unit.

5. The dual-mode monitoring system for borehole gas according to claim 4, characterized in that, The gas monitoring unit includes an insulating shaft, a first curved electrode plate, a second curved electrode plate, and a first insulating electrode plate. The first curved electrode plate, the first insulating electrode plate, and the second curved electrode plate are connected in sequence, and the first curved electrode plate, the first insulating electrode plate, and the second curved electrode plate are spirally wound around the outside of the insulating shaft.

6. The dual-mode monitoring system for borehole gas according to claim 3, characterized in that, The gas flow monitoring submodule includes: A third support frame is disposed below the first support frame and is adjacent to the second support frame. The third support frame is provided with a third air inlet and is connected to the third air outlet. A fifth air outlet is provided on the side of the third support frame opposite to the third air inlet. A heating sensor is disposed within the third support frame; A light temperature sensor is disposed within the third support frame, and the light temperature sensor is disposed adjacent to the heating sensor; An adaptive temperature control integrated unit is connected to the heating sensor and the light temperature sensor, respectively. The second data transmission unit is connected to the heating sensor, the light temperature sensor and the adaptive temperature control integrated unit respectively, and the second data transmission unit is also connected to the data transmission line; The second power supply unit is configured to supply power to the heating sensor, the light temperature sensor, the adaptive temperature control integrated unit, and the second data transmission unit.

7. The dual-mode monitoring system for borehole gas according to claim 6, characterized in that, The adaptive temperature control integrated unit includes a heating subunit, a heat dissipation subunit, and a coordination subunit. The coordination subunit is connected to the heating subunit, the heat dissipation subunit, the heating sensor, and the light temperature sensor, respectively.

8. The dual-mode monitoring system for borehole gas according to claim 1, characterized in that, The dual-modal monitoring system includes an air pump, and the transmission channel further includes a fourth air inlet and an air supply pipe. The fourth air inlet is connected to the air outlet of the dual-modal monitoring module, and the outlet of the air supply pipe is connected to the air pump. The transmission channel is also equipped with traction ropes, and multiple traction ropes are symmetrically arranged on both sides of the transmission channel. The outer wall of the transmission channel is provided with a protective layer, which is made of an ultra-tough material.

9. The dual-mode monitoring system for borehole gas according to claim 1, characterized in that, The data processing module includes: a gas concentration calculation module, a flow velocity negative pressure calculation module, and a temperature automatic controller. The processing module is connected to the borehole gas measuring point via a data transmission line. The gas concentration calculation module is connected to the gas concentration monitoring submodule, the flow velocity negative pressure calculation module is connected to the gas flow monitoring submodule, and the temperature automatic controller is connected to the gas flow monitoring submodule.

10. A method for dual-modal monitoring of borehole gas, utilizing the dual-modal monitoring system according to any one of claims 1 to 9, characterized in that, The dual-modal monitoring method includes the following steps: The dual-modal monitoring system was activated, extracting methane gas from multiple borehole gas monitoring points. The gas enters the gas concentration monitoring submodule and the gas flow monitoring submodule respectively; Based on the gas concentration monitoring submodule and the gas flow monitoring submodule, the monitoring data of the gas is obtained; The monitoring data is transmitted to the data processing module to obtain the concentration, flow rate, and pressure of the gas. The concentration, flow rate, and pressure are displayed on the display module and then analyzed.

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