A mine water disaster monitoring device and method

Abstract

The application provides a mine water disaster monitoring device and method. The device comprises: a plurality of armored electrode chains, the plurality of armored electrode chains are respectively buried along a plurality of different directions of a mine, a plurality of intelligent electrodes are arranged in each armored electrode chain along the length direction of the armored electrode chain, and the plurality of intelligent electrodes of at least one armored electrode chain are buried in different monitoring strata of the mine and coupled with the corresponding monitoring strata; a composite modem is connected with the armored electrode chain and collects the geoelectric field of the armored electrode chain in real time; the composite modem is connected with a reference electrode and collects the background electric field of the mine; the reference electrode is coupled with any monitoring stratum; a control unit is connected with the composite modem, the geoelectric field and the background electric field collected by the composite modem are used to predict the mine water disaster of the mine, and then the potential risk and possibility of inducing mine safety accidents and disasters underground are analyzed through the geoelectric field and the background electric field, so that the prediction of the mine water disaster is realized.

Description

Technical Field

[0001] This application relates to the field of geological monitoring technology, and in particular to a mine water hazard monitoring device and method. Background Technology

[0002] As mining depths and conditions continuously change, the complex geological structures of roadways and working faces frequently disrupt normal coal mine production, severely threatening safe and efficient production and even causing equipment damage and casualties. The frequency and intensity of deep dynamic disasters, such as water inrush accidents, have increased significantly. Water hazards are one of the major safety risks in mine production. Due to unclear mine hydrogeological conditions, effective prevention is impossible, leading to frequent coal mine accidents that seriously endanger property and people's lives.

[0003] Water control is a crucial aspect of coal mine production. Currently, the main geophysical methods used for water detection in mines include: direct current method, transient electromagnetic method, radio wave imaging, audio-frequency electrical imaging, seismic exploration using layer reflection and refraction, Rayleigh wave exploration, microgravity measurement, infrared thermography, and radiometric measurement. The success of geophysical methods depends on various factors such as the effectiveness of the method itself, signal acquisition technology, resolution, signal-to-noise ratio, and differences in physical properties. Currently, the application of geophysical methods primarily relies on detection and cannot monitor the dynamic changes in water temperature and geological conditions in real time.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of this application is to provide a mine water hazard monitoring device and method to solve or alleviate the problems existing in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] This application provides a mine water hazard monitoring device, comprising: multiple armored electrode chains, each buried along multiple different directions of the mine; multiple smart electrodes arranged along the length of each armored electrode chain; and at least one set of smart electrodes buried in different monitoring strata of the mine and coupled to the corresponding monitoring strata; a composite modem connected to the armored electrode chains to collect the geoelectric field of the armored electrode chains in real time; the composite modem connected to a reference electrode to collect the background electric field of the mine; wherein the reference electrode is coupled to any of the monitoring strata; and a control unit connected to the composite modem to predict mine water hazards based on the geoelectric field and background electric field collected by the composite modem.

[0008] Preferably, multiple smart electrodes are connected in parallel, and each smart electrode has a unique address; correspondingly, the composite modem controls the on or off state of the smart electrodes through an H-bridge.

[0009] Preferably, the modem obtains the background electric field of the mine by the potential difference between the geoelectric field of the monitoring stratum corresponding to the smart electrode and the reference electrode.

[0010] Preferably, there are three armored electrode chains, and the three armored electrode chains respectively measure the geoelectric field in three mutually orthogonal directions of the mine.

[0011] Preferably, the smart electrode includes a power terminal, a reference terminal, and a signal terminal. The power terminal is connected to the power port of the composite modem; the reference terminal is connected to the reference port of the composite modem and to the reference electrode; and the signal terminal is connected to the signal port of the composite modem.

[0012] This application embodiment also provides a method for monitoring mine water hazards, which uses the mine water hazard monitoring device described in any of the above embodiments to predict mine water hazards. The mine water hazard monitoring method includes: step S101, burying multiple armored electrode chains in the mine to be monitored along multiple directions; step S102, collecting the geoelectric field and background electric field of the mine in multiple different directions based on the multiple armored electrode chains; step S103, predicting the mine water hazards based on the geoelectric field and background electric field.

[0013] Preferably, in step S101, one of the armored electrode chains is buried vertically in the vertical shaft of the mine; two of the armored electrode chains are buried in two mutually orthogonal directions at the shaft opening; or, two of the armored electrode chains are buried perpendicularly to each other in the mine roadway or working face through which the vertical shaft passes.

[0014] Preferably, in step S101, the length error between the two armored electrode chains buried at the wellhead of the vertical shaft along two mutually orthogonal directions and the length error between the armored electrode chains buried in the vertical shaft is less than or equal to a preset threshold; or, the length error between the two armored electrode chains buried perpendicularly in the mine roadway or working face through which the vertical shaft passes and the length error between the armored electrode chains buried in the vertical shaft is less than or equal to the preset threshold.

[0015] Preferably, in step S102, when the power supply to the geoelectric field is turned off, all the smart electrodes in the armored electrode chain are turned on, and the smart electrodes in the armored electrode chain are turned on sequentially, the geoelectric field in multiple different directions of the mine is collected.

[0016] Preferably, in step S103, the geoelectric field and the background electric field are compared, and the time, spatial location and magnitude of geoelectric field anomalies when the groundwater hydrogeological conditions of the mine change are calculated to predict mine water hazards.

[0017] Beneficial effects:

[0018] In the technical solution provided in this application embodiment, multiple smart electrodes on at least one armored electrode chain are buried in different monitoring strata of the mine and coupled with the corresponding monitoring strata, thereby realizing real-time measurement of the geoelectric field of different monitoring strata; multiple armored electrode chains are buried along multiple different directions of the mine to realize real-time measurement of the geoelectric field in multiple directions of the mine; a composite modem connected to the armored electrode chain completes the data acquisition of the geoelectric field measured by the armored electrode chain; and a reference electrode deployed at infinity and coupled to any monitoring stratum completes the data acquisition of the background electric field of the mine; then, the composite modem sends the acquired geoelectric field and background electric field data to the control unit, which analyzes the potential risks and possibilities of underground-induced mine safety accidents based on the geoelectric field and background electric field, thereby realizing the prediction of mine water hazards. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0020] Figure 1This is a schematic diagram illustrating the deployment of a mine water hazard monitoring device in a mine according to some embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the structure of a mine water hazard monitoring device according to some embodiments of this application;

[0022] Figure 3 This is a schematic diagram of a power supply provided according to some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of a ground electric field potential measurement according to some embodiments of this application;

[0024] Figure 5 This is a schematic cross-sectional view of an electrode chain cable according to some embodiments of this application;

[0025] Figure 6 This is a schematic flowchart of a mine water hazard monitoring method according to some embodiments of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Armored electrode chain; 200. Composite modem; 300. Control unit; 400. Reference electrode; 500. Power supply;

[0028] 101. Smart electrode; 111. Power terminal; 121. Reference terminal; 131. Signal terminal; 102. Power interface; 103. Signal interface;

[0029] 201, H-bridge; 202, power port; 203, reference port; 204, signal port. Detailed Implementation

[0030] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0031] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] Currently, geophysical methods used for mine water hazard monitoring are mainly based on detection and cannot monitor the dynamic changes in hydrogeological conditions in real time. Therefore, establishing a real-time, dynamic, and continuous geophysical method for real-time dynamic monitoring of changes in mine hydrogeological conditions is an urgent problem to be solved in order to effectively prevent mine water hazards and avoid causing loss of life and economic losses. The scheme for dynamic monitoring of mine water hazards disclosed in this application is based on an armored electrode chain 100 that integrates power supply and potential measurement, which monitors changes in mine hydrogeological conditions in real time to prevent mine water hazard accidents.

[0033] like Figures 1-5 As shown, the mine water hazard monitoring device includes: armored electrode chains 100, multiple armored electrode chains 100, which are buried along multiple different directions in the mine. Each armored electrode chain 100 has multiple smart electrodes 101 arranged along its length. At least one armored electrode chain 100 has multiple smart electrodes 101 buried in different monitoring strata within the mine, coupled to the corresponding monitoring strata; a composite modem 200, connected to the armored electrode chains 100, which collects the geoelectric field of the armored electrode chains 100 in real time; the composite modem 200 is connected to a reference electrode 400, which collects the background electric field of the mine; wherein the reference electrode 400 is coupled to any monitoring stratum; and a control unit 300, connected to the composite modem 200, which predicts mine water hazards based on the geoelectric field and background electric field collected by the composite modem 200.

[0034] In this embodiment, multiple smart electrodes 101 of one armored electrode chain 100 are respectively buried in different monitoring strata. By individually controlling the conduction of each smart electrode 101, an artificial geoelectric field can be established in the corresponding monitoring strata. Changes in the mine's hydrogeological conditions will cause changes in the potential distribution of the excitation electric field. Subsequently, the armored electrode chain 100 monitors the potential difference between different locations in the geoelectric field and a reference electrode 400 buried at infinity. Under the action of a unit current in the artificial geoelectric field, if the mine's hydrogeological conditions change, the potential difference between different locations in space and the infinity reference electrode 400 will inevitably change. In this way, the differentiation and real-time monitoring of strata at different depths in the mine can be achieved.

[0035] In this embodiment, multiple smart electrodes 101 are connected in parallel, and each smart electrode 101 has a unique address. Therefore, the unique address of each smart electrode 101 can be used to effectively identify the monitoring stratum corresponding to each smart electrode 101 and the artificial geoelectric field formed therefrom, thereby quickly identifying and locating different monitoring strata in the mine. When the hydrogeological conditions of the mine change, the unique address of the smart electrode 101 can be used to quickly locate the monitoring stratum where the hydrogeological conditions have changed, thereby improving the prediction accuracy and efficiency of mine water hazards.

[0036] In this embodiment, the composite modem 200 controls the switching on or off of the smart electrode 101 via the H-bridge 201. Specifically, the composite modem 200 sends commands to the smart electrode 101 to switch the positive terminal of the ground electric field power supply 500 on or off. In other words, the composite modem 200 controls the switching of the smart electrode 101 via the H-bridge 201, causing the smart electrode 101 to be on or off, and also reverses the current direction of the smart electrode 101 through the control of the H-bridge 201. Simultaneously, the composite modem 200 sends alternating positive and negative square waves to the monitoring ground layer corresponding to the smart electrode 101 via the H-bridge 201, enabling the power supply 500 to establish an artificial ground electric field by coupling with the monitoring ground layer through the smart electrode 101.

[0037] In this embodiment, changes in hydrogeological conditions lead to changes in the excitation electric field of the monitored stratum. The modem obtains the background electric field of the mine by monitoring the potential difference between the geoelectric field of the stratum and the reference electrode 400. Specifically, under the condition of artificial geoelectric field excitation without power supply 500, the potential difference between the smart electrodes 101 of all armored electrode chains 100 and infinity is measured, thereby forming the background electric field of the mine's hydrogeological conditions.

[0038] In this embodiment, there are three armored electrode chains 100, which measure the geoelectric field in three mutually orthogonal directions in the mine. Specifically, one armored electrode chain 100 is buried along the depth direction of the monitored stratum in the mine, and two armored electrode chains 100 are orthogonally buried in two different horizontal directions in a plane, realizing three-dimensional monitoring of the mine's hydrogeology.

[0039] In this embodiment, the smart electrode 101 includes a power terminal 111, a reference terminal 121, and a signal terminal 131. The power terminal 111 is connected to the power port 202 of the composite modem 200; the reference terminal 121 is connected to the reference port 203 of the composite modem 200 and is also connected to the reference electrode 400; and the signal terminal 131 is connected to the signal port 204 of the composite modem 200.

[0040] In this embodiment, the armored electrode chain 100 is composed of a series of smart electrodes 101. The armored electrode chain 100 is connected to the composite modem 200 via electrode chain cables. The composite modem 200 is connected to the ground electric field power supply 500 and the reference electrode 400 via electrode chain cables. Specifically, between the composite modem and the power supply 500, the reference electrode 400, and the control unit 300, the (+) and (-) cores of the electrode chain cable are connected to the two power poles of the power supply 500 through the H-bridge 201, the (G) core is connected to the reference electrode 400 buried at infinity, and the signal line embedded in the electrode chain cable is connected to the control unit 300; between the composite modem 200 and the smart electrode 101, the power terminal 111 of the smart electrode 101 is connected to the power port 202 of the composite modem 200 through (power interface 102) (cores (+) and (-)), the reference terminal 121 of the smart electrode 101 is connected to the reference port 203 of the composite modem 200 through the signal interface 103 (core (G)), and the signal terminal 131 of the smart electrode 101 is connected to the signal port 204 of the composite modem 200 through a signal line.

[0041] In this embodiment, the reference port 203 of the composite modem 200 is connected to the reference electrode 400, and is supplied with voltage and current by the power supply 500. The composite modem 200 sends on or off commands to the armored electrode chain 100, demodulates the ground electric field data transmitted back by the armored electrode chain 100, and sends it to the control unit 300. The control unit 300 processes the real-time monitored ground electric field and background electric field in three mutually orthogonal directions to predict hydrological hazards in the mine.

[0042] It should be noted that the smart electrode 101 of this application measures the potential of the monitored stratum by setting a potentiometer (V), thereby realizing real-time monitoring of changes in the hydrogeological conditions of the monitored stratum and providing a basis for predicting hydrological disasters in mines.

[0043] Figure 6 This is a schematic flowchart of a mine water hazard monitoring method according to some embodiments of this application; as shown Figure 6 As shown, the mine water hazard monitoring method uses the mine water hazard monitoring device of any of the above embodiments to predict mine water hazards. The mine water hazard monitoring method includes:

[0044] Step S101: Bury multiple armored electrode chains 100 in multiple directions in the mine to be monitored;

[0045] In this embodiment of the application, one armored electrode chain 100 is buried vertically in a vertical shaft of the mine; two armored electrode chains 100 are buried at the shaft opening in two mutually orthogonal directions; or, two armored electrode chains 100 are buried perpendicularly to each other in the mine roadway or working face through which the vertical shaft passes.

[0046] Specifically, in a mine where hydrological disaster monitoring is required or where potential hydrological disasters have occurred, a vertical well is drilled, passing through different monitoring strata and their aquifers. An armored electrode chain 100 is slowly lowered into the completed wellbore, and the exposed metal of the armored electrode chain is coupled with the surrounding strata (current is connected and conduction occurs). Cement slurry is then injected into the wellbore to permanently fix the armored electrode chain 100 underground.

[0047] Two shallow trenches are excavated in two mutually orthogonal directions at the borehole head, and two armored electrode chains 100 are laid in the corresponding trenches; alternatively, two mutually perpendicular shallow trenches or horizontal wells are excavated at the mine roadway or working face through which the vertical shaft passes, and two armored electrode chains 100 are laid in the corresponding trenches or horizontal wells. After the armored electrode chains 100 are laid in the shallow trenches or horizontal wells, cement is pumped into the borehole using a high-pressure cement pump to fill the annulus between the armored electrode chains 100 and the borehole with cement slurry. After the cement slurry solidifies, the armored monitoring electrode chains and the monitored strata rock are permanently fixed and coupled together.

[0048] In this embodiment of the application, the length error between the two armored electrode chains 100 buried at the wellhead of the vertical shaft along two mutually orthogonal directions and the length error between the armored electrode chains 100 buried in the vertical shaft is less than or equal to a preset threshold; or, the length error between the two armored electrode chains 100 buried perpendicularly in the mine roadway or working face through which the vertical shaft passes and the length error between the armored electrode chains 100 buried in the vertical shaft is less than or equal to a preset threshold.

[0049] Specifically, the length error of the two shallow trenches excavated in two mutually orthogonal directions at the borehole opening is no greater than 10%, and the length of the two armored electrode chains 100 buried therein is equivalent to the length of the two shallow trenches. Similarly, the length error of the two mutually perpendicular shallow trenches or horizontal wells excavated at the mine roadway or working face through which the vertical shaft passes is no greater than 10%, and the length of the two armored electrode chains 100 buried therein is equivalent to the length of the shallow trenches or horizontal wells. Here, the length error of the three armored electrode chains 100 is no greater than 10%, ensuring both the effective acquisition of signals (geoelectric field and background electric field) and facilitating signal imaging processing.

[0050] Step S102: Based on multiple armored electrode chains 100, collect the geoelectric field in multiple different directions of the mine and the background electric field of the mine.

[0051] In this embodiment, the electrode chain cable of the armored electrode chain 100 is connected to the composite modem 200 at the wellhead. Specifically, the power port 202 of the composite modem 200 is connected to the (+) and (-) cores of the electrode chain cable, the reference port 203 of the composite modem 200 is connected to the (G) core of the electrode chain cable, and the signal port 204 of the composite modem 200 is connected to the signal line of the electrode chain cable. Simultaneously, the composite modem 200 is connected to the reference terminal 121, the power supply 500, and the control unit 300. When the composite modem 200 is activated, it supplies power to the smart electrodes 101 or combinations of smart electrodes 101 of the armored electrode chain 100, and collects real-time data on changes in the geoelectric field measured along three mutually orthogonal directions of the armored electrode chain 100.

[0052] In this embodiment of the application, when collecting the geoelectric field and background electric field of the mine in multiple different directions based on multiple armored electrode chains 100, the geoelectric field in multiple different directions of the mine is collected when the power supply 500 for the geoelectric field is turned off, all the smart electrodes 101 in the armored electrode chain 100 are turned on, and the smart electrodes 101 in the armored electrode chain 100 are turned on sequentially.

[0053] In this embodiment, changes in hydrogeological conditions will lead to abnormal changes in the geoelectric field. The geoelectric field changes caused by these changes are recorded under three conditions: the geoelectric field power supply 500 is turned off; all smart electrodes 101 of the armored electrode chain 100 in the vertical shaft are connected to the power supply 500; and the smart electrodes 101 of the armored electrode chain 100 in the vertical shaft are sequentially connected to the power supply 500. Correspondingly, by applying an artificial electric field to some or all of the monitored strata, the signal-to-noise ratio of the corresponding monitored strata can be effectively improved; by applying an artificial electric field to a single monitored stratum, the sensitivity to changes in the hydrogeological conditions of that single stratum can be effectively improved.

[0054] Specifically, the power supply 500 to the ground electric field is turned off, and the potential difference between the armored electrode chain 100 and the reference electrode 400 buried at infinity is recorded using the composite modem 200, that is, the background electric field of the mine hydrogeological conditions is recorded. Then, the power supply 500 for the geoelectric field is turned on. Using the composite modem 200, all the smart electrodes 101 of the armored electrode chain 100 in the vertical shaft are connected to the power supply 500. At the same time, the potential difference between the other two armored electrode chains 100 (two armored electrode chains 100 buried at the head of the vertical shaft in two mutually orthogonal directions, or two armored electrode chains 100 buried perpendicularly in the mine roadway or working face through which the vertical shaft passes) and the reference electrode 400 buried at infinity is measured. That is, the background electric field of the armored electrode chain 100 under the excitation condition of the power supply 500 in the mine hydrogeological conditions is recorded. Similarly, through the composite modem 200, the smart electrodes 101 of the armored electrode chain 100 in the vertical shaft are sequentially connected. At the same time, the potential difference between the other two armored electrode chains 100 and the reference electrode 400 is measured. That is, the background electric field under different monitoring strata or depth hydrogeological conditions under single electrode excitation conditions is recorded.

[0055] Step S103: Based on the geoelectric field and background electric field, predict the mine water hazard.

[0056] In this embodiment, when water flows into the mine through fissures or becomes larger, the resistivity of the mine formation (monitored formation) decreases. With a low unit voltage, the current is large, resulting in a relatively large electric field (intensity), and the potential measured by the smart electrode 101 of the armored electrode chain 100 is high. As the fissures generated during mine mining gradually enlarge over time, the resistivity of the formation (monitored formation) caused by water flowing into the mine through the fissures gradually decreases, and the potential measured by the smart electrode 101 of the armored electrode chain 100 gradually strengthens. The shape of the potential measurement curve of the smart electrode 101 and the fitting function of the potential over time, obtained at time intervals of t1, t2, t3, ..., tn (where n is a positive integer), are used to predict the trend of mine water hazards.

[0057] In this application, multiple smart electrodes 101 of the armored electrode chain 100 simultaneously measure the potential of multiple monitored strata, enabling more accurate acquisition of the spatial distribution of fractures or hydrogeological conditions in the mine. Due to the excitation electric field of the armored electrode chain 100 vertically arranged along the depth direction of the monitored strata and the measurement potential of a horizontal armored electrode chain 100, the change in the geoelectric field intensity of the vertical plane over time can be obtained. By measuring the potential of two armored electrode chains 100, the change in the geoelectric field intensity of mutually orthogonal vertical planes over time can be obtained. Furthermore, through interpolation, the change in the formation resistivity of the three-dimensional hydrogeological conditions of the observation area or target area of ​​the mine over time can be obtained.

[0058] In this embodiment, when all the smart electrodes 101 of the armored electrode chain 100, which is vertically arranged along the depth direction of the monitored stratum, are energized, the resolution of the mine hydrogeological conditions or fractures in the vertical direction is low. The following steps are used to obtain the changes in the mine hydrogeological conditions or fractures over time:

[0059] First, with all the smart electrodes 101 of the vertically arranged armored electrode chain 100 turned on (energized), measure the potential of all the smart electrodes 101 of the other mutually orthogonally arranged armored electrode chains 100. Then, turn off all the smart electrodes 101 of the vertically arranged armored electrode chain 100, and turn them on sequentially according to the vertical arrangement order of the smart electrodes 101 (each smart electrode 101 has a unique address), and measure the potential of all the smart electrodes 101 of the other mutually orthogonally arranged armored electrode chains 100.

[0060] If the intensity of the excitation electric field of the smart electrode 101 monitoring the stratum increases relative to its historical measured potential, or if the intensity of the excitation electric field of the smart electrode 101 monitoring other strata changes (greater than or less than a preset threshold), then the hydrogeological or fracture changes in that monitored stratum are abnormal. Based on this, by comparing the geoelectric field and the background electric field, the temporal and spatial location of changes in the mine's groundwater hydrogeological conditions and the magnitude of geoelectric field anomalies are calculated through inversion, thereby predicting mine water hazards.

[0061] In this embodiment, the geoelectric field of the monitored stratum is measured by three mutually orthogonal armored electrode chains 100, and the background electric field of the monitored stratum is obtained in conjunction with the reference electrode 400. Using the established mine hydrogeophysical model, based on the geophysical forward modeling method, the changes in the excitation electric field (intensity) and potential measured by the smart electrode 101 of the armored electrode chain 100 are simulated when the hydrogeological conditions of the mine change. At the same time, the mine hydrogeophysical model is corrected according to the actual measurement values ​​of the armored electrode chain 100, so that the simulated values ​​(electric field intensity, potential) of the mine hydrogeophysical model are close to the actual measurement values ​​of the armored electrode chain 100. Thus, the changes in hydrogeological conditions can be quickly obtained through the mine hydrogeophysical model, that is, the dynamic changes in the space of the mine hydrogeological conditions over time can be obtained by using the geophysical inversion calculation method.

[0062] In this embodiment, the geoelectric field recorded on the armored electrode chains 100 in three mutually orthogonal directions is compared with the background electric field. The time, three-dimensional spatial location and magnitude of geoelectric field anomaly of the changes in groundwater hydrogeological conditions are calculated by inversion. Based on the inversion results, the strata or well sections with abnormal changes in mine hydrogeological conditions are analyzed to determine the potential risks and possibilities of mine water hazards induced by abnormal mine hydrogeological conditions, and to provide timely early warning information on the possible occurrence of mine water hazards.

[0063] In the embodiments of this application, the geoelectric field under natural conditions and 500 excitation conditions of the power supply in the mine can be monitored in real time, dynamically and continuously, the changes in the hydrogeological conditions of the mine can be analyzed by inversion, the potential risks and possibilities of mine water hazards can be analyzed, and early warning information can be provided in a timely manner to improve the early warning and prevention of mine water hazards.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mine water disaster monitoring device, characterized in that, include: The armored electrode chain comprises multiple armored electrode chains, which are buried along multiple different directions of the mine. Each armored electrode chain has multiple smart electrodes arranged along its length. At least one armored electrode chain has multiple smart electrodes buried in different monitoring strata of the mine, and the exposed metal of the armored electrode chain is permanently coupled with the surrounding strata. A composite modem is connected to the armored electrode chain to acquire the geoelectric field of the armored electrode chain in real time; the composite modem is connected to a reference electrode to acquire the background electric field of the mine; wherein the reference electrode is coupled to any of the monitored strata. The control unit is connected to the composite modem and predicts mine water hazards based on the geoelectric field and background electric field collected by the composite modem. The smart electrode includes a power terminal, a reference terminal, and a signal terminal. The power terminal is connected to the power port of the composite modem; the reference terminal is connected to the reference port of the composite modem and to the reference electrode; and the signal terminal is connected to the signal port of the composite modem. The composite modem is connected to the reference terminal, power supply, and control unit; Multiple smart electrodes are connected in parallel, and each smart electrode has a unique address; Correspondingly, The composite modem controls the on / off state of the smart electrode via an H-bridge.

2. The mine water disaster monitoring device according to claim 1, characterized by, The composite modem obtains the background electric field of the mine by measuring the potential difference between the geoelectric field of the monitored stratum corresponding to the smart electrode and the reference electrode.

3. The mine water hazard monitoring device according to claim 1, characterized in that, The armored electrode chain consists of three chains, which respectively measure the geoelectric field in three mutually orthogonal directions of the mine.

4. A mine water disaster monitoring method, characterized in that, The mine water hazard monitoring device according to any one of claims 1-3 is used to predict mine water hazards in the mine, and the mine water hazard monitoring method includes: Step S101: Bury multiple armored electrode chains in multiple directions in the mine to be monitored; Step S102: Based on the multiple armored electrode chains, collect the geoelectric field in multiple different directions of the mine and the background electric field of the mine; Step S103: Based on the geoelectric field and background electric field, predict the mine water hazard of the mine.

5. The mine water hazard monitoring method according to claim 4, characterized in that, In step S101, One of the armored electrode chains is buried vertically in the vertical shaft of the mine. The two armored electrode chains are buried at the opening of the vertical shaft along two mutually orthogonal directions, or the two armored electrode chains are buried perpendicularly to each other in the mine roadway or working face through which the vertical shaft passes.

6. The mine water hazard monitoring method according to claim 5, characterized in that, In step S101, The length error between the lengths of the two armored electrode chains buried at the wellhead of the vertical well along two mutually orthogonal directions and the length error between the lengths of the armored electrode chains buried in the vertical well is less than or equal to a preset threshold. or, The length error between the lengths of the two armored electrode chains that are perpendicularly buried in the mine roadway or working face through which the vertical shaft passes and the length of the armored electrode chain buried in the vertical shaft is less than or equal to the preset threshold.

7. The mine water hazard monitoring method according to claim 4, characterized in that, In step S102, The geoelectric field in the mine is collected when the power supply to the geoelectric field is turned off, when all the smart electrodes in the armored electrode chain are turned on, and when the smart electrodes in the armored electrode chain are turned on sequentially.

8. The mine water hazard monitoring method according to any one of claims 5-7, characterized in that, In step S103, By comparing the geoelectric field and the background electric field, the time, space location and geoelectric field of the mine when the groundwater hydrogeological conditions change are calculated in reverse, so as to predict the mine water hazard.

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