CN114545514A - Mine water disaster monitoring device and method - Google Patents
Mine water disaster monitoring device and method Download PDFInfo
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- CN114545514A CN114545514A CN202210193140.XA CN202210193140A CN114545514A CN 114545514 A CN114545514 A CN 114545514A CN 202210193140 A CN202210193140 A CN 202210193140A CN 114545514 A CN114545514 A CN 114545514A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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
Technical Field
The application relates to the technical field of geological monitoring, in particular to a mine water disaster monitoring device and method.
Background
Along with the continuous change of the mining depth and the mining conditions of a mine, the tunnel excavation, namely the complex geological structure of a working face, often causes the abnormal operation of coal mine production, the safe and efficient production of the coal mine is seriously threatened, even equipment damage and casualties are caused, and the frequency and the strength of deep dynamic disasters such as water penetration accidents and the like are obviously increased. The water disaster is one of the main potential safety hazards in mine production, and the conditions such as mine hydrological address conditions and the like are not clear and cannot be effectively prevented, so that coal mine accidents frequently occur, and property and people life safety are seriously threatened.
Water control is a very important task in coal mine production operations, and the main geophysical methods currently used by mines for who also detects include: the method comprises the geophysical exploration measures such as a mine direct current method, a mine transient electromagnetic method, radio wave perspective, audio frequency electrical perspective, layer reflection and refraction seismic exploration, Rayleigh wave exploration, microgravity measurement, infrared temperature measurement, radioactivity measurement and the like. Whether the geophysical method succeeds or not depends on multiple factors such as effectiveness of the adopted method, a signal acquisition technology, resolution, a signal-to-noise ratio, physical property difference and the like, and the conventional geophysical method is mainly applied by detection and cannot monitor dynamic changes of water temperature and geological conditions in real time.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The application aims to provide a mine water damage monitoring device and a mine water damage monitoring method, so as to solve or alleviate the problems in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a mine water damage monitoring devices 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 is used for acquiring the ground electric field of the armored electrode chain in real time; the composite modem is connected with the reference electrode and is used for collecting a background electric field of the mine; wherein the reference electrode is coupled to any of the monitored formations; and the control unit is connected with the composite modem and used for predicting the mine water damage of the mine according to the ground electric field and the background electric field collected by the composite modem.
Preferably, a plurality of the intelligent electrodes are arranged in parallel, and each intelligent electrode has a unique address; correspondingly, the composite modem controls the intelligent electrode to be switched on or off through the H bridge.
Preferably, the modem acquires the background electric field of the mine through the potential difference between the ground electric field of the monitored formation corresponding to the intelligent electrode and the reference electrode.
Preferably, there are three armored electrode chains, and the three armored electrode chains respectively measure the ground electric fields in three mutually orthogonal directions of the mine.
Preferably, the smart electrode comprises a power supply terminal, a reference terminal and a signal terminal, wherein the power supply terminal is connected with a power supply port of the composite modem; the reference terminal is connected with a reference port of the composite modem and is connected with the reference electrode; the signal terminal is connected with a signal port of the composite modem.
The embodiment of the application further provides a mine water damage monitoring method, the mine water damage monitoring device of any one of the embodiments is adopted to predict the mine water damage of the mine, and the mine water damage monitoring method comprises the following steps: s101, embedding a plurality of armored electrode chains in a mine to be monitored along a plurality of directions; step S102, collecting a plurality of ground electric fields in different directions of the mine and a background electric field of the mine based on a plurality of armored electrode chains; and S103, predicting the mine water damage of the mine according to the ground electric field and the background electric field.
Preferably, in step S101, one armored electrode chain is embedded in a vertical well of the mine along a vertical direction; and embedding the two armored electrode chains into the wellhead of the vertical well along two mutually orthogonal directions, or embedding the two armored electrode chains into a mine roadway or a working face through which the vertical well passes, wherein the two armored electrode chains are mutually perpendicular.
Preferably, in step S101, the length error between the two armored electrode chains embedded in the vertical well mouth along two mutually orthogonal directions and the length error between the armored electrode chains embedded in the vertical well mouth is less than or equal to a preset threshold value; or the length error between the two armored electrode chains which are vertically embedded in the mine roadway or the working face through which the vertical well passes and the length error between the two armored electrode chains embedded in the vertical well are smaller than or equal to the preset threshold value.
Preferably, in step S102, when the power supply of the earth electric field is turned off, all the intelligent electrodes in the armored electrode chain are turned on, and the intelligent electrodes in the armored electrode chain are sequentially turned on, the earth electric fields in the plurality of different directions of the mine are collected.
Preferably, in step S103, the geoelectric field is compared with the background electric field, and the time, the spatial position and the magnitude of the anomaly of the geoelectric field when the underground hydrogeological condition of the mine changes are calculated in an inversion manner, so as to predict the mine water damage of the mine.
Has the advantages that:
in the technical scheme provided by the embodiment of the application, the intelligent electrodes on at least one armored electrode chain are buried in different monitoring stratums of a mine and are coupled with the corresponding monitoring stratums, so that the real-time measurement of the ground electric fields of the different monitoring stratums is realized; the multiple armored electrode chains are embedded along multiple different directions of a mine, so that real-time measurement of the ground electric fields in multiple directions of the mine is realized; the data acquisition of the ground electric field measured by the armored electrode chain is completed through a composite modem connected with the armored electrode chain; and completing data acquisition of a background electric field of the mine by a reference electrode which is arranged at infinity and coupled with any monitoring stratum; and then, the composite modem sends the collected data of the ground electric field and the background electric field to the control unit, and the control unit analyzes the potential risk and possibility of underground induced mine safety accident disasters according to the ground electric field and the background electric field, so that the prediction of the mine water damage is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
fig. 1 is a schematic view of a mine flood damage monitoring device deployed in a mine according to some embodiments of the present application;
fig. 2 is a schematic structural view of a mine water damage monitoring device according to some embodiments of the present application;
FIG. 3 is a schematic diagram of a power supply according to some embodiments of the present application;
FIG. 4 is a schematic illustration of a ground electric field potential measurement provided in accordance with some embodiments of the present application;
fig. 5 is a cross-sectional schematic view of an electrode chain cable provided in accordance with some embodiments of the present application;
fig. 6 is a schematic flow chart of a mine flood damage monitoring method according to some embodiments of the present application.
Description of reference numerals:
100. sheathing an electrode chain; 200. a composite modem; 300. a control unit; 400. a reference electrode; 500. a power supply;
101. an intelligent electrode; 111. a power supply terminal; 121. a reference terminal; 131. a signal terminal; 102. a power interface; 103. a signal interface;
201. an H bridge; 202. a power port; 203. a reference port; 204. a signal port.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of 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 instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
In the description of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present application but do not require that the present application must be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
At present, the geophysical method adopted for monitoring the water disaster of the mine mainly takes detection as a main part and cannot monitor the dynamic change of the hydrogeological condition in real time, so that the establishment of a real-time, dynamic and continuous geophysical method for dynamically monitoring the change of the hydrogeological condition of the mine in real time is an urgent problem to be solved, so that the occurrence of the water disaster of the mine is effectively prevented, and the life safety and economic loss of people are avoided. In the scheme for dynamically monitoring the mine water disaster, the armored electrode chain 100 integrating power supply and potential measurement is used for dynamically monitoring the mine hydrogeological condition change in real time and preventing the mine water disaster accident.
As shown in fig. 1 to 5, the mine water damage monitoring device includes: the armored electrode chain 100 is provided with a plurality of armored electrode chains 100, the armored electrode chains 100 are respectively embedded along a plurality of different directions of a mine, a plurality of intelligent electrodes 101 are distributed in each armored electrode chain 100 along the length direction of the armored electrode chain 100, and the intelligent electrodes 101 of at least one armored electrode chain 100 are embedded in different monitoring stratums of the mine and are coupled with the corresponding monitoring stratums; the composite modem 200 is connected with the armored electrode chain 100, and the ground electric field of the armored electrode chain 100 is acquired in real time; the composite modem 200 is connected with the reference electrode 400 and used for collecting the background electric field of the mine; wherein the reference electrode 400 is coupled to any of the monitored formations; and a control unit 300 connected to the composite modem 200, for predicting the water damage of the mine according to the ground electric field and the background electric field collected by the composite modem 200.
In the embodiment of the application, the plurality of intelligent electrodes 101 of one armored electrode chain 100 are respectively and correspondingly buried in different monitoring stratums, and by independently controlling the conduction of each intelligent electrode 101, an artificial earth electric field can be established in the corresponding different monitoring stratums by using the intelligent electrodes 101, and the potential distribution of the excitation electric field is changed due to the change of the hydrogeological conditions of the mine. Then, the potential difference between different positions of the ground electric field space and the reference electrode 400 buried at infinity is monitored through the armored electrode chain 100, and under the action of unit current of the artificial ground electric field, if the hydrogeological conditions of the mine are changed, the potential difference between the different positions of the space and the reference electrode 400 at infinity is inevitably changed, so that the difference and real-time monitoring of the stratums at different depths of the mine are realized.
In the embodiment of the present application, a plurality of intelligent electrodes 101 are arranged in parallel, and each intelligent electrode 101 has a unique address; therefore, the monitoring stratum corresponding to each intelligent electrode 101 and the formed artificial earth field can be effectively identified by using the unique address of the intelligent electrode 101, different monitoring stratums of a mine can be further identified and positioned quickly, when the hydrogeological condition of the mine changes, the monitoring stratum with the changed hydrogeological condition can be positioned quickly through the unique address of the intelligent electrode 101, and the prediction precision and the prediction efficiency of the mine water damage are improved.
In the embodiment of the present application, the composite modem 200 controls the intelligent electrode 101 to be turned on or off through the H-bridge 201. That is, the composite modem 200 sends a command to the smart electrode 101 to turn on or off the positive electrode of the earth electric field power supply 500, that is, the composite modem 200 controls the switching of the smart electrode 101 through the H-bridge 201 to turn on or off the smart electrode 101, and reverses the current direction of the smart electrode 101 through the control of the H-bridge 201. Meanwhile, the composite modem 200 sends positive and negative alternating square waves to the monitored stratum corresponding to the intelligent electrode 101 through the H-bridge 201, so that the power supply 500 can establish an artificial ground field by coupling the monitored stratum with the intelligent electrode 101.
In the embodiment of the present application, the variation of hydrogeological conditions may cause the variation of the excitation electric field of the monitored formation, and the modem acquires 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, under the condition of artificial ground field excitation without the power supply 500, the potential difference between the intelligent electrodes 101 of all the armored electrode chains 100 and infinite distances is measured, so that a background electric field of the mine hydrogeological conditions is formed.
In the embodiment of the present application, there are three armored electrode chains 100, and the three armored electrode chains 100 respectively measure the ground electric fields in three mutually orthogonal directions of the mine. Specifically, one armored electrode chain 100 is buried along the depth direction of a monitoring stratum of the mine, and two armored electrode chains 100 are buried along two different horizontal directions in an orthogonal manner in a plane, so that the three-dimensional monitoring of the hydrogeology of the mine is realized.
In the embodiment of the present application, the smart electrode 101 includes a power supply terminal 111, a reference terminal 121, and a signal terminal 131, the power supply terminal 111 is connected with a power supply port 202 of the composite modem 200; reference terminal 121 is connected to reference port 203 of composite modem 200 and to reference electrode 400; the signal terminal 131 is connected to a 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 intelligent electrodes 101, the armored electrode chain 100 is connected with the composite modem 200 through an electrode chain cable, and the composite modem 200 is connected with the ground electric field power supply 500 and the reference electrode 400 through the electrode chain cable. Specifically, between the composite tuner and the power supply 500, the reference electrode 400 and the control unit 300, the core (+) and the core (-) of the electrode chain cable are connected to the two poles of the power supply 500 through the H-bridge 201, the core (G) is connected to the reference electrode 400 buried in an infinite distance, 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 supply terminal 111 of the smart electrode 101 and the power supply port 202 of the composite modem 200 are connected through (power supply interface 102) (core (+) and core (-) respectively), the reference terminal 121 of the smart electrode 101 and the reference port 203 of the composite modem 200 are connected through the signal interface 103 (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 a power supply voltage and current, and the composite modem 200 sends an on or off command to the armored electrode chain 100, demodulates the data of the ground electric field returned by the armored electrode chain 100, and sends the data to the control unit 300. The control unit 300 processes the real-time monitored ground electric fields and background electric fields in three mutually orthogonal directions, so as to predict the hydrological disasters of the mine.
It should be noted that, the intelligent electrode 101 of the present application performs potential measurement on the monitored stratum through the potentiometer (V), so as to realize real-time monitoring of hydrogeological condition changes of the monitored stratum, and provide a basis for predicting hydrogeological disasters of a mine.
FIG. 6 is a schematic flow chart of a method for monitoring water damage in a mine according to some embodiments of the present application; as shown in fig. 6, the mine water damage monitoring method adopts the mine water damage monitoring device of any one of the above embodiments to predict the mine water damage of the mine, and includes:
s101, embedding a plurality of armored electrode chains 100 in a mine to be monitored along multiple directions;
in the embodiment of the application, one armored electrode chain 100 is buried in a vertical well of a mine along the vertical direction; the two armored electrode chains 100 are embedded in the wellhead of the vertical well along two mutually orthogonal directions, or the two armored electrode chains 100 are embedded in the mine roadway or the working face through which the vertical well passes in a mutually perpendicular mode.
Specifically, a vertical well is drilled in a mine needing to be monitored for the hydrological disaster or having the potential hydrological disaster, the vertical well penetrates through different monitoring stratums and aquifers thereof, one armored electrode chain 100 is slowly lowered into the drilled well hole, exposed metal connected with the armored electrode is enabled to be coupled with the surrounding stratums (current is conducted and conduction is conducted), then cement is poured into the well hole, and the armored electrode chain 100 is permanently fixed underground.
Respectively excavating two shallow trenches in two mutually orthogonal directions at the ground of a drilling wellhead, and correspondingly laying two armored electrode chains 100 in the two shallow trenches; or two mutually vertical shallow trenches or horizontal wells are respectively excavated at the mine roadway or the working face through which the vertical well passes, and two armored electrode chains 100 are correspondingly laid in the shallow trenches or the horizontal wells. After the armored electrode chain 100 in the shallow trench or the horizontal well is laid, cement is pumped into the hole by a cement high-pressure pump, so that the annular space between the armored electrode chain 100 and the drilled hole is filled with cement paste, and after the cement paste is solidified, the armored monitoring electrode chain and the monitored stratum rock are permanently and fixedly coupled together.
In the embodiment of the application, the length error between the two armored electrode chains 100 buried in the vertical well mouth along two mutually orthogonal directions and the length error between the armored electrode chains 100 buried in the vertical well mouth is less than or equal to a preset threshold value; or the length error between the two armored electrode chains 100 which are vertically embedded in the mine roadway or the working face through which the vertical well passes and the length error between the armored electrode chains 100 embedded in the vertical well is less than or equal to a preset threshold value.
Specifically, the length error of two shallow trenches dug in two mutually orthogonal directions at the ground of a drilling wellhead is not more than 10%, and the length of two correspondingly embedded armored electrode chains 100 is equivalent to that of the two shallow trenches. The length error of two mutually vertical shallow trenches or horizontal wells dug at a mine roadway or a working face through which a vertical well passes is not more than 10%, and the length of two correspondingly embedded armored electrode chains 100 is equivalent to that of the shallow trenches or the horizontal wells. 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 signals (the ground electric field and the background electric field), but also facilitates the imaging processing of the signals.
Step S102, collecting a plurality of earth electric fields in different directions of a mine and a background electric field of the mine based on a plurality of armored electrode chains 100;
in the present embodiment, the electrode chain cable of the armored electrode chain 100 is connected to the composite modem 200 at the wellhead, i.e., the power port 202 of the composite modem 200 is connected to the cores (+) and (-) of the electrode chain cable, the reference port 203 of the composite modem 200 is connected to the 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 with the reference terminal 121, the power supply 500, and the control unit 300. And starting the composite modem 200, respectively supplying power to the intelligent electrode 101 or the intelligent electrode 101 combination of the armored electrode chain 100, and acquiring change data of the ground electric field measured by the armored electrode chain 100 along three mutually orthogonal directions in real time.
In the embodiment of the application, when the earth electric fields in a plurality of different directions of the mine and the background electric field of the mine are collected based on the plurality of armored electrode chains 100, the earth electric fields in the plurality of different directions of the mine are collected when the earth electric field power supply 500 is turned off, all the intelligent electrodes 101 in the armored electrode chains 100 are turned on, and the intelligent electrodes 101 in the armored electrode chains 100 are sequentially turned on.
In the embodiment of the application, the hydrogeological condition changes to cause the abnormal change of the earth electric field, and the change of the earth electric field caused by the change of the hydrogeological condition of the mine is recorded under three conditions that the earth electric field power supply 500 is turned off, all the intelligent electrodes 101 of the armored electrode chain 100 in the vertical well are conducted with the power supply 500, and the intelligent electrodes 101 of the armored electrode chain 100 in the vertical well are sequentially conducted with the power supply 500 through the three orthogonal armored electrode chains 100. Correspondingly, the artificial electric field is applied to part or all of the monitored stratum, so that the monitoring signal-to-noise ratio of the corresponding monitored stratum can be effectively improved; the sensitivity of the single stratum hydrological condition change of the corresponding monitored stratum can be effectively improved by applying the artificial electric field on the single monitored stratum.
Specifically, the power supply 500 of the earth electric 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 at infinity, that is, the background electric field of the hydrogeological conditions of the mine. Then, a power supply 500 of the earth electric field is turned on, all the intelligent electrodes 101 of the armored electrode chain 100 in the vertical well are conducted with the power supply 500 by using the composite modem 200, and the potential difference between the other two armored electrode chains 100 (two armored electrode chains 100 embedded in the wellhead of the vertical well along two mutually orthogonal directions, or two armored electrode chains 100 embedded in a mine roadway or a working surface through which the vertical well passes, or two armored electrode chains 100 embedded in the mine roadway or the working surface perpendicular to each other) and the reference electrode 400 embedded in an infinite distance is measured at the same time, that is, the background electric field of the armored electrode chain 100 under the mine hydrogeological condition under the excitation condition of the power supply 500 is recorded; similarly, the intelligent electrodes 101 of the armored electrode chains 100 in the vertical well are sequentially conducted through the composite modem 200, and the potential difference between the other two armored electrode chains 100 and the reference electrode 400 is measured at the same time, namely, the background electric field under different monitoring stratum or deep hydrogeological conditions under the single-electrode excitation condition is recorded.
And S103, predicting the mine water damage of the mine according to the ground electric field and the background electric field.
In the embodiment of the application, when a water source gushes out of or grows to a mine through a crack, the resistivity of a mine stratum (a monitoring stratum) is reduced, under the condition of low unit voltage, the current is high, the corresponding ground electric field (strength) is high, and the potential measured by the intelligent electrode 101 of the armored electrode chain 100 is high. When the crack generated in the mine exploitation is gradually enlarged along with the time, the resistivity of the stratum (monitoring stratum) caused by the water source flowing to the mine through the crack is gradually reduced, the potential measured by the intelligent electrode 101 of the armored electrode chain 100 is gradually enhanced, and the potential is gradually increased at t1、t2、t3… and tn (wherein n is a positive integer), and predicting the occurrence trend of the mine water damage by the form of the measurement curve of the potential of the intelligent electrode 101 obtained at intervals and the fitting function of the potential with time.
In the application, the plurality of intelligent electrodes 101 of the armored electrode chain 100 measure the potentials of a plurality of monitored strata simultaneously, and the fracture of a mine or the spatial distribution form of hydrogeological conditions can be acquired more accurately. The changes of the intensity of the ground electric field of the vertical plane along with the time can be obtained by measuring the electric potential through the two armored electrode chains 100, and the changes of the intensity of the ground electric field of the vertical plane along with the time can be obtained by further obtaining the changes of the formation resistivity of the three-dimensional hydrogeological conditions of the observation area or the target area of the mine along with the time through an interpolation method.
In the embodiment of the application, when all the intelligent electrodes 101 of the armored electrode chain 100 vertically arranged along the depth direction of the monitored stratum are electrified, the resolution of the mine hydrogeological condition or fracture in the vertical direction is low, and the time-varying change of the mine hydrogeological condition or fracture is obtained through the following steps:
firstly, measuring the potentials of all intelligent electrodes 101 of other armored electrode chains 100 which are orthogonally arranged mutually under the condition that the intelligent electrodes 101 of the armored electrode chains 100 which are vertically arranged are all conducted (electrified); then, all the intelligent electrodes 101 of the vertically arranged armored electrode chain 100 are closed, and then the intelligent electrodes 101 are sequentially conducted according to the arrangement sequence of the intelligent electrodes 101 in the vertical direction (the intelligent electrodes 101 have unique addresses), and the potentials of all the intelligent electrodes 101 of other armored electrode chains 100 which are arranged in an orthogonal mode are measured.
In response to the intensity of the excitation electric field of the smart electrode 101 monitoring the formation being enhanced relative to its historically measured potential or the intensity of the excitation electric field of the smart electrode 101 relative to other smart electrodes 101 monitoring the formation being changed (greater than or less than a preset threshold), the hydrogeology or fracture change of the monitored formation is abnormal. Therefore, the time and the space position of the underground hydrogeological condition change of the mine and the abnormal size of the ground electric field are calculated in an inversion mode by comparing the ground electric field with the background electric field, and the mine water damage of the mine is predicted.
In the embodiment of the application, a ground electric field of a monitored stratum is measured through three armored electrode chains 100 in mutually orthogonal directions, a background electric field of the monitored stratum is obtained by combining with a reference electrode 400, and an excitation electric field (intensity) and potential change measured by an intelligent electrode 101 of the armored electrode chain 100 when hydrogeological conditions of a mine change are simulated by using an established mine hydrogeological physical model based on a geophysical forward method; meanwhile, the hydrogeological physical model of the mine is corrected according to the actual measurement value of the armored electrode chain 100, so that the analog value (electric field intensity and electric potential) of the hydrogeological physical model of the mine is close to the actual measurement value of the armored electrode chain 100, and the change of hydrogeological conditions can be rapidly obtained through the hydrogeological physical model of the mine, namely the dynamic change of the hydrogeological conditions of the mine along with time is obtained by adopting a geophysical inversion calculation method.
In the embodiment of the application, the ground electric fields recorded on the armored electrode chains 100 in the three mutually orthogonal directions are compared with the background electric field, the time, the three-dimensional space position and the abnormal size of the ground electric field generated by the change of the underground hydrogeological condition are calculated in an inversion mode, the stratum or the well section with the abnormal mine hydrogeological condition is analyzed according to the inversion result, the potential risk and the possibility of the mine water damage caused by the abnormal mine hydrogeological condition are judged, and early warning information of the possible occurrence of the mine water damage is provided in time.
In the embodiment of the application, the ground electric fields under the natural conditions of the mine and the excitation conditions of the power supply 500 can be monitored dynamically and continuously in real time, the change of the hydrogeological conditions of the mine can be analyzed in an inversion mode, the potential risk and the possibility of the water damage of the mine can be analyzed, early warning information can be provided timely, and the early warning and prevention and control of the water damage of the mine can be improved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A mine water damage monitoring device, comprising:
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 is used for acquiring the ground electric field of the armored electrode chain in real time; the composite modem is connected with the reference electrode and is used for collecting a background electric field of the mine; wherein the reference electrode is coupled to any of the monitored formations;
and the control unit is connected with the composite modem and used for predicting the mine water damage of the mine according to the ground electric field and the background electric field collected by the composite modem.
2. The mine flood damage monitoring device of claim 1, wherein a plurality of said intelligent electrodes are arranged in parallel, and each said intelligent electrode has a unique address;
in a corresponding manner, the first and second optical fibers are,
and the composite modem controls the on or off of the intelligent electrode through an H bridge.
3. The mine water damage monitoring device of 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 stratum corresponding to the intelligent electrode and the reference electrode.
4. The mine water damage monitoring device of claim 1,
the number of the armored electrode chains is three, and the three armored electrode chains respectively measure the ground electric fields of the mine in three mutually orthogonal directions.
5. The mine water damage monitoring device of any one of claims 1 to 4, wherein the smart electrode comprises a power terminal, a reference terminal and a signal terminal, the power terminal being connected to a power port of the composite modem; the reference terminal is connected with a reference port of the composite modem and is connected with the reference electrode; the signal terminal is connected with a signal port of the composite modem.
6. A mine water damage monitoring method, characterized in that the mine water damage monitoring device of any one of claims 1 to 5 is used for predicting the mine water damage of the mine, and the mine water damage monitoring method comprises the following steps:
s101, embedding a plurality of armored electrode chains in a mine to be monitored along a plurality of directions;
step S102, collecting a plurality of ground electric fields in different directions of the mine and a background electric field of the mine based on a plurality of armored electrode chains;
and S103, predicting the mine water damage of the mine according to the ground electric field and the background electric field.
7. The mine water damage monitoring method according to claim 6, wherein in step S101,
embedding the armored electrode chain in a vertical well of the mine along the vertical direction;
and embedding the two armored electrode chains into the wellhead of the vertical well along two mutually orthogonal directions, or embedding the two armored electrode chains into a mine roadway or a working face through which the vertical well passes, wherein the two armored electrode chains are mutually perpendicular.
8. The mine water damage monitoring method according to claim 7, wherein in step S101,
the length error between the lengths of the two armored electrode chains embedded in the vertical well mouth along two mutually orthogonal directions and the length error between the armored electrode chains embedded in the vertical well mouth is smaller than or equal to a preset threshold value;
alternatively, the first and second electrodes may be,
the length of the two armored electrode chains which are vertically embedded in the mine roadway or the working face through which the vertical well passes and the length error of the armored electrode chain embedded in the vertical well are smaller than or equal to the preset threshold value.
9. The mine water damage monitoring method as claimed in claim 6, wherein in step S102,
and when the power supply of the ground electric field is turned off, the intelligent electrodes in the armored electrode chain are all conducted, and the intelligent electrodes in the armored electrode chain are sequentially conducted, the ground electric fields in a plurality of different directions of the mine are collected.
10. The mine water damage monitoring method as claimed in any one of claims 6 to 9, wherein in step S103,
and comparing the ground electric field with the background electric field, and calculating time, space position and ground electric field when the underground hydrogeological condition of the mine changes in an inversion manner so as to predict the mine water damage of the mine.
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| CN202210193140.XA CN114545514A (en) | 2022-02-28 | 2022-02-28 | Mine water disaster monitoring device and method |
| PCT/CN2022/133217 WO2023066409A1 (en) | 2022-02-28 | 2022-11-21 | Mine water hazard monitoring apparatus and method |
| SE2350728A SE2350728A1 (en) | 2022-02-28 | 2022-11-21 | Mine water hazard monitoring apparatus and method |
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| CN117114206B (en) * | 2023-10-23 | 2024-01-26 | 北京联创高科信息技术有限公司 | Calculation method for coal mine water damage index data trend |
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| US7158048B2 (en) * | 2003-10-09 | 2007-01-02 | Scintrex Limited | Identically programmed intelligent electrodes for use in geoelectrical surveys |
| CN106443794B (en) * | 2016-08-30 | 2018-08-28 | 安徽惠洲地质安全研究院股份有限公司 | A kind of three-dimensional electrical method observation system and geologic body method for surveying parallel |
| CN210347952U (en) * | 2019-09-12 | 2020-04-17 | 东华理工大学 | Distributed three-dimensional resistivity dynamic variable density self-adaptive grid intelligent acquisition device |
| CN112031743A (en) * | 2020-09-28 | 2020-12-04 | 中油奥博(成都)科技有限公司 | Underground fluid identification device and measurement method based on distributed optical fiber sensing technology |
| CN112415615A (en) * | 2020-12-04 | 2021-02-26 | 中油奥博(成都)科技有限公司 | Time-frequency electromagnetic fracturing monitoring system and monitoring method based on distributed optical fiber sensing |
| CN112780256B (en) * | 2021-03-03 | 2023-11-03 | 中油奥博(成都)科技有限公司 | Horizontal well microseism monitoring system and monitoring method based on distributed optical fiber sensing |
| CN113568037B (en) * | 2021-08-17 | 2023-05-23 | 中油奥博(成都)科技有限公司 | Earthquake and geological disaster monitoring system and monitoring method based on optical fiber sensing technology |
| CN113818929A (en) * | 2021-08-26 | 2021-12-21 | 四川省煤炭设计研究院 | Mine underground water dynamic monitoring system, control method and application |
| CN113653534B (en) * | 2021-08-31 | 2024-03-22 | 中煤科工集团重庆研究院有限公司 | Mine water damage early warning system and method |
| CN114545514A (en) * | 2022-02-28 | 2022-05-27 | 河南省许昌新龙矿业有限责任公司 | Mine water disaster monitoring device and method |
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