CN114545514A - Mine water disaster monitoring device and method - Google Patents

Abstract

The application provides a mine water damage monitoring device and method. The device includes: the armored electrode chains are respectively embedded along a plurality of different directions of the mine, a plurality of intelligent electrodes are distributed in each armored electrode chain along the length direction of the armored electrode chain, and the intelligent electrodes of at least one armored electrode chain are embedded in different monitoring stratums of the mine and are coupled with the corresponding monitoring stratums; the composite modem is connected with the armored electrode chain and collects the ground electric field of the armored electrode chain in real time; the composite modem is connected with the reference electrode and used for collecting a background electric field of a mine; the reference electrode is coupled with any monitoring stratum; the control unit is connected with the composite modem, and predicts the mine water damage of the mine according to the ground electric field and the background electric field collected by the composite modem, and further analyzes the potential risk and possibility of underground induced mine safety accident disasters through the ground electric field and the background electric field, so that the prediction of the mine water damage is realized.

Description

A mine water hazard monitoring device and method

technical field

The present application relates to the technical field of geological monitoring, in particular to a mine water hazard monitoring device and method.

Background technique

As the mining depth and mining conditions of the mine continue to change, the complex geological structure of the roadway mining, that is, the working face, often leads to the failure of the coal mine production work, the safe and efficient production of the coal mine is seriously threatened, and even causes equipment damage and casualties, such as deep water penetration accidents. The frequency and intensity of dynamic disasters increased significantly. Water damage is one of the main safety hazards in mine production. Due to the unknown conditions such as mine hydrological location and other conditions, it cannot be effectively prevented, resulting in frequent coal mine accidents, which seriously endanger the safety of property and people's lives.

Water control is a very important work in coal mine production operations. Currently, the main geophysical methods used for mine detection include: mine direct current method, mine transient electromagnetic method, radio wave perspective, audio frequency perspective, layer reflection and refraction Geophysical exploration methods such as seismic exploration, Rayleigh wave exploration, microgravity measurement, infrared temperature measurement, and radioactivity measurement. The success of geophysical methods depends on many factors such as the effectiveness of the methods used, signal acquisition technology, resolution, signal-to-noise ratio, and physical property differences. At present, the application of geophysical methods is mainly based on detection, and cannot monitor water temperature and geology in real time. Dynamic changes in conditions.

Therefore, it is necessary to provide an improved technical solution for the deficiencies of the above-mentioned prior art.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a mine water hazard monitoring device and method to solve or alleviate the above-mentioned problems in the prior art.

In order to achieve the above purpose, the application provides the following technical solutions:

The application provides a mine water hazard monitoring device, comprising: armored electrode chains, there are multiple armored electrode chains, and the multiple armored electrode chains are respectively buried along multiple different directions of the mine, each A plurality of smart electrodes are arranged in the armored electrode chain along the length direction of the armored electrode chain, and a plurality of the smart electrodes of at least one of the armored electrode chains are buried in different monitoring formations of the mine, coupled with the corresponding monitoring formation; a composite modem, which is connected to the armored electrode chain to collect the ground electric field of the armored electrode chain in real time; the composite modem is connected to the reference electrode to collect the mine shaft wherein, the reference electrode is coupled with any of the monitoring formations; the control unit is connected to the composite modem, and based on the geoelectric field and the background electric field collected by the composite modem, the Predicting water damage.

Preferably, a plurality of the smart electrodes are arranged in parallel, and each of the smart electrodes has a unique address; correspondingly, the composite modem controls the on or off of the smart electrodes through an H bridge.

Preferably, the modem obtains the background electric field of the mine through the potential difference between the ground electric field of the monitoring formation corresponding to the smart electrode and the reference electrode.

Preferably, there are three armored electrode chains, and the three armored electrode chains respectively measure the earth electric field in three mutually orthogonal directions of the mine.

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 is connected to the reference The electrodes are connected; the signal terminal is connected with the signal port of the composite modem.

The embodiment of the present application also provides a mine water hazard monitoring method, which uses the mine water hazard monitoring device described in any of the above embodiments to predict the mine water hazard in the mine. The mine water hazard monitoring method includes: step S101: The armored electrode chains are buried in the mine to be monitored in multiple directions; step S102, based on the multiple armored electrode chains, collect the geoelectric fields of the mine in different directions and the background electric field of the mine ; Step S103 , predicting the mine water damage of the mine according to the geoelectric field and the background electric field.

Preferably, in step S101, one of the armored electrode chains is buried in the vertical well of the mine along a vertical direction; two of the armored electrode chains are buried in the vertical well along two mutually orthogonal directions The wellhead, or, the two armored electrode chains are buried perpendicular to each other in the mine roadway or working face through which the vertical shaft passes.

Preferably, in step S101, the length error between the lengths of the two armored electrode chains embedded in the wellhead of the vertical well and the length of the armored electrode chains embedded in the vertical well in two mutually orthogonal directions is less than or equal to a preset value threshold; or, the length error between the lengths of the two armored electrode chains buried in the mine roadway or working face that the vertical shaft passes through and the length of the armored electrode chain buried in the vertical shaft is less than or equal to the preset threshold value .

Preferably, in step S102, when the power supply of the ground electric field is respectively 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 in sequence, many The geoelectric fields in different directions are collected.

Preferably, in step S103, the geoelectric field and the background electric field are compared, and the time, space position and abnormal magnitude of the geoelectric field when the underground geology and geological conditions of the mine are changed are calculated by inversion, so as to determine the abnormal magnitude of the geoelectric field in the mine. Prediction of mine water hazards.

Beneficial effects:

In the technical solutions provided by the embodiments of the present application, multiple smart electrodes on at least one armored electrode chain are buried in different monitoring strata of the mine, and are coupled with the corresponding monitoring strata, thereby realizing the detection of the geoelectric field of the different monitoring strata. Real-time measurement; 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; through the composite modem connected with the armored electrode chain, the measurement of the armored electrode chain is completed. The data acquisition of the geoelectric field; and, through the reference electrode coupled with any monitoring formation at infinity, the data acquisition of the background electric field of the mine is completed; then, the composite modem transmits the collected data of the geoelectric field and the background electric field To the control unit, the control unit analyzes the potential risks and possibilities of underground induced mine safety accidents and disasters according to the geoelectric field and background electric field, and realizes the prediction of mine water hazards.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application. in:

1 is a schematic diagram of the layout of a mine water hazard monitoring device in a mine provided according to some embodiments of the present application;

2 is a schematic structural diagram of a mine water hazard monitoring device provided according to some embodiments of the present application;

3 is a schematic structural diagram of a power supply provided according to some embodiments of the present application;

4 is a schematic diagram of a ground electric field potential measurement provided according to some embodiments of the present application;

5 is a schematic cross-sectional view of an electrode chain cable provided according to some embodiments of the present application;

FIG. 6 is a schematic flowchart of a mine water hazard monitoring method provided according to some embodiments of the present application.

Description of reference numbers:

100, armored electrode chain; 200, composite modem; 300, control unit; 400, reference electrode; 500, power supply;

101, smart electrode; 111, power terminal; 121, reference terminal; 131, signal terminal; 102, power interface; 103, signal interface;

201, H bridge; 202, power port; 203, reference port; 204, signal port.

Detailed ways

The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. The various examples are provided by way of explanation of the application and do not limit the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield yet another embodiment. Therefore, it is intended that this application cover such modifications and variations as come within the scope of the appended claims and their equivalents.

In the description of this application, the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top" and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application rather than requiring the application to be constructed and operated in a specific orientation, and therefore cannot be understood as LIMITATIONS ON THIS APPLICATION. The terms "connected", "connected" and "arranged" used in this application should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through intermediate components; it can be It is a wired electrical connection, a radio connection, or a wireless communication signal connection. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

At present, the geophysical methods used in mine water hazard monitoring are mainly based on detection, and cannot monitor the dynamic transformation of hydrogeological conditions in real time. Therefore, a real-time, dynamic and continuous geophysical method is established to dynamically monitor mine hydrogeological conditions in real time Change is an urgent problem to be solved in order to effectively prevent the occurrence of mine water hazards and avoid human life safety and economic losses. In the scheme for dynamic monitoring of mine water hazards disclosed in this application, based on the armored electrode chain 100 integrating power supply and potential measurement, changes in mine hydrogeological conditions are dynamically monitored in real time to prevent mine water hazards from occurring.

As shown in Figures 1 to 5, the mine water hazard monitoring device includes: armored electrode chains 100, there are multiple armored electrode chains 100, and the multiple armored electrode chains 100 are respectively buried along multiple different directions of the mine. In the armored electrode chain 100, a plurality of smart electrodes 101 are arranged along the length direction of the armored electrode chain 100, and the plurality of smart electrodes 101 of at least one armored electrode chain 100 are buried in different monitoring strata of the mine, and correspond to the corresponding monitoring strata. coupling; composite modem 200, which is connected to the armored electrode chain 100, and collects the ground electric field of the armored electrode chain 100 in real time; the composite modem 200 is connected to the reference electrode 400, and collects the background electric field of the mine; wherein, the reference electrode 400 is connected to any 1. Monitoring formation coupling; the control unit 300, connected with the composite modem 200, predicts the mine water damage in the mine according to the geoelectric field and the background electric field collected by the composite modem 200.

In the embodiment of the present application, the plurality of smart electrodes 101 of one armored electrode chain 100 are respectively embedded in different monitoring formations, and by individually controlling the conduction of each smart electrode 101, the smart electrodes 101 can Artificial geoelectric fields are established in different monitoring strata, and changes in mine hydrogeological conditions will lead to changes in the potential distribution of the excitation electric fields. Then, the potential difference between different positions of the geoelectric field in space and the reference electrode 400 buried in infinity is monitored through the armored electrode chain 100. Under the action of the unit current of the artificial geoelectric field, if the hydrogeological conditions of the mine change, it will inevitably lead to different spaces. The potential difference between the position and the infinity reference electrode 400 changes, thereby realizing the distinction and real-time monitoring of the strata at different depths of the mine.

In the embodiment of the present application, a plurality of smart electrodes 101 are arranged in parallel, and each smart electrode 101 has a unique address; thus, the unique address of the smart electrode 101 can be used to monitor the stratum corresponding to each smart electrode 101, and the formed The artificial geoelectric field can be effectively identified, and then the different monitoring strata of the mine can be quickly identified and located. When the hydrogeological conditions of the mine change, the unique address of the smart electrode 101 can be used to quickly locate the monitored strata with changes in the hydrogeological conditions, so as to improve the risk of mine water damage. Forecast accuracy and forecast efficiency.

In the embodiment of the present application, the composite modem 200 controls the on or off of the smart electrode 101 through the H bridge 201 . That is, the composite modem 200 sends an instruction to the smart electrode 101 to turn on or off the positive electrode of the ground electric field power supply 500, that is, the composite modem 200 controls the switch of the smart electrode 101 through the H bridge 201, so that the smart electrode 101 is turned on or off. open, and reverse the current direction of the smart electrode 101 through the control of the H-bridge 201 . At the same time, the composite modem 200 sends positive and negative alternating square waves to the monitoring formation corresponding to the smart electrode 101 through the H bridge 201 , so that the power supply 500 can couple the monitoring formation with the smart electrode 101 to establish an artificial geoelectric field.

In the embodiment of the present application, the change of the hydrogeological conditions will cause the excitation electric field of the monitoring formation to change, and the modem obtains the background electric field of the mine by monitoring the potential difference between the ground electric field of the formation and the reference electrode 400 . Specifically, without the artificial ground electric field excitation of the power supply 500, the potential difference between the smart electrodes 101 of all the armored electrode chains 100 and infinity is measured, thereby forming the background electric field of the mine hydrogeological conditions.

In the embodiment of the present application, there are three armored electrode chains 100, and the three armored electrode chains 100 respectively measure the geoelectric fields in three mutually orthogonal directions of the mine. Specifically, one armored electrode chain 100 is buried along the depth direction of the monitored stratum of the mine, and two armored electrode chains 100 are buried orthogonally in two different horizontal directions in the plane to realize three-dimensional monitoring of the mine hydrogeology.

In the embodiment of the present application, 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 It is connected to the reference electrode 400 ; the signal terminal 131 is connected to the signal port 204 of the composite modem 200 .

In the embodiment of the present application, 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 through the electrode chain cable, and the composite modem 200 is connected to the ground electric field power supply 500 through the electrode chain cable. , the reference electrode 400 is connected. Specifically, between the composite modulation demodulator and the power supply 500 , the reference electrode 400 and the control unit 300 , the wire core (+) and the wire core (-) of the electrode chain cable are connected to the power supply 500 through the H bridge 201 . The two poles of the power supply, the wire core (G) is connected with the reference electrode 400 embedded in infinity, the signal line embedded in the electrode chain cable is connected with the control unit 300; between the composite modem 200 and the smart electrode 101, the smart electrode The power terminal 111 of 101 and the power port 202 of the composite modem 200 are connected through (power interface 102 ) (wire core (+) and wire core (-)), and the reference terminal 121 of the smart electrode 101 and the reference terminal 121 of the composite modem 200 The ports 203 are connected through the signal interface 103 (wire core (G)), and the signal terminal 131 of the smart electrode 101 and the signal port 204 of the composite modem 200 are connected through a signal line.

In the embodiment of the present application, the reference port 203 of the composite modem 200 is connected to the reference electrode 400, and the power supply 500 provides the power supply voltage and current, and the composite modem 200 sends an on or off command to the armored electrode chain 100, and The data of the ground electric field returned by the armored electrode chain 100 is demodulated and sent to the control unit 300 . The control unit 300 processes the real-time monitoring of the geoelectric field and the background electric field in three mutually orthogonal directions, so as to realize the prediction of the hydrological disaster in the mine.

It should be noted that the smart electrode 101 of the present application performs potential measurement on the monitoring stratum through the set potentiometer (V), so as to realize real-time monitoring of changes in the hydrogeological conditions of the monitoring stratum, and provide a basis for the prediction of hydrological disasters in the mine.

FIG. 6 is a schematic flow chart of a mine water hazard monitoring method provided according to some embodiments of the present application; as shown in FIG. 6 , the mine water hazard monitoring method adopts the mine water hazard monitoring device of any of the above-mentioned embodiments to perform the mine water hazard monitoring in the mine. It is predicted that the mine water hazard monitoring methods include:

Step S101, burying a plurality of armored electrode chains 100 in a mine to be monitored along a plurality of directions;

In the embodiment of the present application, one armored electrode chain 100 is buried in the vertical well of the mine in the vertical direction; two armored electrode chains 100 are buried in the wellhead of the vertical well in two mutually orthogonal directions, The armored electrode chains 100 are buried perpendicular to each other in the mine roadway or working face through which the vertical shaft passes.

Specifically, a vertical well is drilled in a mine where hydrological disaster monitoring is required or potential hydrological disasters occur, and an armored electrode chain 100 is slowly lowered into the drilled well hole through different monitoring formations and their aquifers. , and make the bare metal connected by the armored electrode to complete the coupling with the surrounding formation (the current is connected to conduct electricity), and then pour cement slurry in the wellbore to permanently fix the armored electrode chain 100 downhole.

Two shallow trenches are excavated in two mutually orthogonal directions at the ground of the borehole wellhead, and two armored electrode chains 100 are correspondingly laid in the two shallow trenches; or, at the mine roadway or working face where the vertical shaft passes through Two mutually perpendicular shallow trenches or horizontal wells are excavated respectively, and two armored electrode chains 100 are correspondingly laid in the shallow trenches or horizontal wells. After the armored electrode chain 100 in the shallow trench or horizontal well is laid, the cement is pumped into the hole with a high-pressure cement pump, so that the annulus between the armored electrode chain 100 and the drilled hole is filled with cement slurry, and the cement slurry is consolidated Afterwards, the armored monitoring electrode chain and the monitoring formation rock are permanently coupled together.

In the embodiment of the present application, the error between the lengths of the two armored electrode chains 100 embedded in the wellhead of the vertical well in two mutually orthogonal directions and the length of the armored electrode chains 100 embedded in the vertical well is less than or equal to a preset threshold; or , the error between the lengths of the two armored electrode chains 100 buried in the mine roadway or working face perpendicular to each other and the length of the armored electrode chains 100 buried in the vertical shaft is less than or equal to a preset threshold.

Specifically, the length error of the two shallow trenches excavated in two mutually orthogonal directions on the ground of the borehole wellhead is not greater than 10%, and the length of the two buried armored electrode chains 100 corresponds to the length of the two shallow trenches. equivalent in length. The length error of excavating two mutually perpendicular shallow trenches or horizontal wells is not more than 10% at the mine roadway or working face that the vertical well passes through, and the length of the corresponding buried two armored electrode chains 100 is equal to of the same length. Here, the length error of the three armored electrode chains 100 is not more than 10%, which not only ensures the acquisition effect of the signal (ground electric field, background electric field), but also makes the signal easy to perform imaging processing.

Step S102, collecting the geoelectric fields of the mine in different directions and the background electric field of the mine based on the plurality of armored electrode chains 100;

In the embodiment of the present application, the electrode chain cable of the armored electrode chain 100 is connected to the composite modem 200 at the wellhead, that is, the power port 202 of the composite modem 200 is connected to the wire core (+) and wire core (+) of the electrode chain cable. -), the reference port 203 of the composite modem 200 is connected to the wire core (G) 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. Meanwhile, the composite modem 200 is connected to the reference terminal 121 , the power supply 500 and the control unit 300 . Start the composite modem 200, respectively supply power to the smart electrodes 101 or the smart electrodes 101 in the armored electrode chain 100, and collect the change data of the ground electric field measured along the armored electrode chains 100 in three mutually orthogonal directions in real time.

In the embodiment of the present application, when collecting the geoelectric fields in multiple different directions of the mine and the background electric field in the mine based on the multiple armored electrode chains 100, the power supply 500 for the geoelectric field is turned off, and the armored electrode chains 100 are respectively turned off. When all the smart electrodes 101 in the mine are turned on, and the smart electrodes 101 in the armored electrode chain 100 are turned on in sequence, the geoelectric fields in multiple different directions of the mine are collected.

In the embodiment of the present application, changes in hydrogeological conditions will lead to abnormal changes in the geoelectric field. The three orthogonal armored electrode chains 100 are used to record the shutdown of the geoelectric field power supply 500 and all smart electrodes of the armored electrode chain 100 in the vertical well. 101 is connected to the power supply 500, and the smart electrodes 101 of the armored electrode chain 100 in the vertical well are connected to the power supply 500 in turn, and the change of the geoelectric field caused by the change of the hydrogeological conditions of the mine. Correspondingly, by applying an artificial electric field to some or all of the monitoring strata, the monitoring signal-to-noise ratio of the corresponding monitoring stratum can be effectively improved; sensitivity.

Specifically, the power supply 500 of the geoelectric field is turned off, and the composite modem 200 is used to record the potential difference between the armored electrode chain 100 and the reference electrode 400 buried in infinity, that is, to record the background electric field of mine hydrogeological conditions. Then, turn on the power supply 500 of the ground electric field, use the composite modem 200 to make all the smart electrodes 101 of the armored electrode chain 100 in the vertical well conduct with the power supply 500, and measure the other two armored electrode chains 100 (along the positive The two armored electrode chains 100 buried in the wellhead of the vertical well in the two directions of the intersection, or the two armored electrode chains 100 buried in the mine roadway or working face that the vertical well passes through) and the reference buried in infinity are perpendicular to each other. The potential difference between the electrodes 400 is to record the background electric field of the armored electrode chain 100 under the mine hydrogeological conditions under the excitation condition of the power supply 500; similarly, through the composite modem 200, the armored electrode chain in the vertical well is turned on in turn The smart electrode 101 of 100 simultaneously measures the potential difference between the other two armored electrode chains 100 and the reference electrode 400, that is, records the background electric field under different monitoring formations or deep hydrogeological conditions under the single-electrode excitation condition.

Step S103 , predict the mine water damage in the mine according to the geoelectric field and the background electric field.

In the embodiment of the present application, when the water source flows out or becomes larger in the mine through the crack, the resistivity of the mine stratum (monitored stratum) will become smaller. When the unit voltage is small, the current will be larger, and the corresponding ground electric field will be larger. (strength) is relatively large, and the potential measured by the smart electrodes 101 of the armored electrode chain 100 is relatively high. When the fissures produced by mine mining gradually become larger over time, the resistivity of the stratum (monitored stratum) caused by the surging of the water source to the mine through the fissures gradually decreases, and the potential measured by the smart electrodes 101 of the armored electrode chain 100 gradually changes. The shape of the measurement curve of the potential of the smart electrode 101 and the fitting function of the potential with time obtained at the intervals of t ₁ , t ₂ , t ₃ , ..., tn (wherein, n is a positive integer), and then predict the mine water damage trend occurs.

In the present application, the multiple smart electrodes 101 of the armored electrode chain 100 simultaneously measure the potentials of multiple monitored formations, which can more accurately obtain the spatial distribution pattern of the fissures or hydrogeological conditions of the mine. Due to the excitation electric field of the armored electrode chain 100 arranged vertically along the depth direction of the monitored stratum and the measurement potential of a horizontal armored electrode chain 100, the change of the ground electric field intensity on the vertical plane with time can be obtained. Through the two armored electrode chains 100 By measuring the potential, the change of the geoelectric field strength of the orthogonal vertical planes with time can be obtained, and then the change of the formation resistivity of the three-dimensional hydrogeological conditions of the observation area or the target area of the mine with time can be obtained through the interpolation method.

In the embodiment of the present application, when all the smart electrodes 101 of the armored electrode chain 100 vertically arranged along the depth direction of the monitoring stratum are powered on, the resolution of the mine hydrogeological conditions or fractures in the vertical direction is low, and the mine shaft is obtained through the following steps Changes in hydrogeological conditions or fractures over time:

First, measure the potentials of all the smart electrodes 101 of other armored electrode chains 100 arranged orthogonally to each other under the condition that all the smart electrodes 101 of the armored electrode chain 100 arranged vertically are turned on (energized); The smart electrodes 101 of the electrode chain 100 are all turned off, and then turned on in sequence according to the arrangement order of the smart electrodes 101 in the vertical direction (the smart electrodes 101 have unique addresses), and measure all the smart electrodes of other armored electrode chains 100 arranged orthogonally to each other. 101 potential.

In response to an increase in the strength of the excitation electric field of the smart electrode 101 monitoring the formation relative to its historical measured potential, or a change (greater or less than a preset threshold) relative to the strength of the excitation electric field of other smart electrodes 101 monitoring the formation, the monitoring Abnormal changes in the hydrogeology or fractures of the formation. Based on this, by comparing the geoelectric field and the background electric field, inverting and calculating the time, space position and anomalous magnitude of the geoelectric field of the underground hydrogeological conditions of the mine, the mine water damage in the mine is predicted.

In the embodiment of the present application, the geoelectric field of the monitored stratum is measured by three armored electrode chains 100 in mutually orthogonal directions, and the background electric field of the monitored stratum is obtained in combination with the reference electrode 400, and the established mine hydrogeological and physical model is used. , based on the method of geophysical forward modeling, simulate the excitation electric field (intensity) and potential changes measured by the smart electrode 101 of the armored electrode chain 100 when the hydrogeological conditions of the mine change; at the same time, according to the actual measurement of the armored electrode chain 100 The hydrogeological and physical model of the mine is corrected, so that the simulated values (electric field strength, potential) of the hydrogeological and physical model of the mine are similar to the actual measured values of the armored electrode chain 100, so that the mine can be quickly obtained through the hydrogeological and physical model of the mine. The change of hydrogeological conditions is to use the method of geophysical inversion calculation to obtain the dynamic changes of space with time in the hydrogeological conditions of the mine.

In the embodiment of the present application, the geoelectric field recorded on the armored electrode chains 100 in three mutually orthogonal directions is compared with the background electric field, and the time, three-dimensional spatial position and anomalous size of the geoelectric field generated by the change of the groundwater geology and geological conditions are inverted and calculated. , according to the inversion results, analyze the strata or well sections with abnormal mine hydrogeological changes, identify the potential risk and possibility of mine water damage caused by abnormal mine hydrogeological conditions, and provide early warning information of mine water damage in a timely manner.

In the embodiment of the present application, the geoelectric field under the natural conditions of the mine and under the excitation condition of the power supply 500 can be monitored in real time, dynamically and continuously, the changes in the hydrogeological conditions of the mine can be inverted and analyzed, and the potential risk and possibility of the occurrence of water damage in the mine can be analyzed. , to provide early warning information in a timely manner, and improve the early warning and prevention and control of mine water hazards.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. a mine water hazard monitoring device, is characterized in that, comprises: Armored electrode chains, there are multiple armored electrode chains, the multiple armored electrode chains are respectively buried along multiple different directions of the mine, and each armored electrode chain is along the armored electrode chains A plurality of smart electrodes are arranged in the length direction of the chain, and the plurality of smart electrodes of at least one of the armored electrode chains are embedded in different monitoring strata of the mine, and are coupled with the corresponding monitoring strata; a composite modem, which is connected to the armored electrode chain to collect the ground electric field of the armored electrode chain in real time; the composite modem is connected to a reference electrode to collect the background electric field of the mine; wherein the reference an electrode is coupled to any of the monitoring formations; A control unit, connected with the composite modem, predicts the mine water damage in the mine according to the geoelectric field and the background electric field collected by the composite modem. 2. The mine water hazard monitoring device according to claim 1, wherein a plurality of the smart electrodes are arranged in parallel, and each of the smart electrodes has a unique address; corresponding, The composite modem controls the on or off of the smart electrodes through the H bridge. 3 . The mine water hazard monitoring device according to claim 1 , wherein the modem obtains the background electric field of the mine through the potential difference between the ground electric field of the monitoring formation corresponding to the smart electrode and the reference electrode. 4 . 4. mine water hazard monitoring device according to claim 1, is characterized in that, There are three armored electrode chains, and the three armored electrode chains respectively measure the earth electric field in three mutually orthogonal directions of the mine. 5. The mine water hazard monitoring device according to any one of claims 1-4, wherein the smart electrode comprises a power terminal, a reference terminal and a signal terminal, and the power terminal is connected to a power port of the composite modem; The reference terminal is connected to the reference port of the composite modem and to the reference electrode; the signal terminal is connected to the signal port of the composite modem. 6. A mine water hazard monitoring method, wherein the mine water hazard monitoring device described in any one of claims 1-5 is used to predict the mine water hazard of the mine, and the mine water hazard monitoring method comprises: Step S101, burying multiple armored electrode chains in the mine to be monitored along multiple directions; Step S102 , collecting a plurality of geoelectric fields in different directions of the mine and the background electric field of the mine based on the plurality of armored electrode chains; Step S103 , predicting the mine water damage of the mine according to the geoelectric field and the background electric field. 7. The mine water hazard monitoring method according to claim 6, wherein in step S101, A piece of the armored electrode chain is buried in the vertical well of the mine along the vertical direction; The two armored electrode chains are buried in the wellhead of the vertical well in two directions orthogonal to each other, or the two armored electrode chains are buried perpendicular to each other in the mine roadway or working face that the vertical well passes through. . 8. mine water hazard monitoring method according to claim 7, is characterized in that, in step S101, The error between the lengths of the two armored electrode chains embedded in the wellhead of the vertical well along two mutually orthogonal directions and the length of the armored electrode chains embedded in the vertical well is less than or equal to a preset threshold; or, The error between the lengths of the two armored electrode chains buried in the mine roadway or working face that the vertical shaft passes through and the length of the armored electrode chains buried in the vertical shaft is less than or equal to the preset threshold. 9. mine water hazard monitoring method according to claim 6, is characterized in that, in step S102, When the power supply of 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 in sequence, the geoelectric fields in multiple different directions of the mine are collected. . 10. The mine water hazard monitoring method according to any one of claims 6-9, wherein in step S103, The geoelectric field and the background electric field are compared, and the time, space position and geoelectric field when the underground hydrogeological conditions of the mine are changed are calculated inversely, so as to predict the mine water damage of the mine.

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