Method and device for determining water accumulation rate of coal mine goaf, medium and equipment
By establishing the correspondence between the water accumulation rate of the goaf and the extreme value of the induced electromotive force increase, the transient electromagnetic method is used to detect the induced electromotive force, and accurately determine the water accumulation rate of the coal mine goaf, solving the problem of difficult to determine the water accumulation rate of the goaf, and improving the safety of mining operations.
Patent Information
- Application Number
- CN202510130386.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2025-06-13
AI Technical Summary
The water accumulation rate in coal mine goaf is difficult to accurately determine, resulting in high safety risks in mining operations, and it is difficult for existing technology to effectively solve this problem.
By obtaining the correspondence between the water accumulation rate of the goaf and the increase extreme value of the induced electromotive force, the induced electromotive force of the target goaf is detected by transient electromagnetic method, and the water accumulation rate of the goaf is determined based on the increase extreme value and correspondence relationship.
It realizes the accurate determination of the water accumulation rate in the coal mine goaf, improves the safety of mining operations, is simple, fast processing speed and high accuracy.
Smart Images
Figure CN120143271A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of geological exploration technology, and in particular, to a method, device, medium and equipment for determining the water accumulation rate of a coal mine goaf. Background Art
[0002] Large-scale early development of coal resources will generate goafs in old coal mines, which will bring great safety hazards to underground coal mine production. The problem of water hazard prevention in goafs is to find out the water content in goafs so that effective prevention and control measures can be taken; geophysical transient electromagnetic detection is a leading means of achieving prediction and forecasting. Among many geophysical detection methods, transient electromagnetic method is an effective means of detecting water-bearing structures in goafs and is widely used in the detection of water-rich coal-bearing strata. Summary of the invention
[0003] The purpose of the present invention is to provide a method, device, medium and equipment for determining the water accumulation rate of the goaf area of a coal mine, which can more accurately determine the water accumulation rate of the goaf area and improve the safety of mining operations.
[0004] In order to achieve the above object, the present disclosure provides a method for determining the water accumulation rate of a coal mine goaf, the method comprising: Obtaining the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase of the induced electromotive force, wherein the extreme value of the increase of the induced electromotive force is the extreme value of the increase of the induced electromotive force obtained by the transient electromagnetic method relative to the reference induced electromotive force, and the reference induced electromotive force is the induced electromotive force obtained by the transient electromagnetic method when the water accumulation rate of the goaf is zero; Obtaining the induced electromotive force corresponding to the target goaf area detected by transient electromagnetic method; The water accumulation rate of the target goaf is determined according to the maximum value of the increase of the induced electromotive force corresponding to the target goaf and the corresponding relationship.
[0005] Optionally, the step of obtaining the corresponding relationship between the water accumulation rate of the goaf and the maximum value of the increase of the induced electromotive force includes: Determining geological data of a goaf model, the goaf model including water content, depth and resistivity of the goaf; Obtaining the working parameters of the transient electromagnetic method detection device; According to the geological data and the working parameters, a plurality of groups of induced electromotive forces corresponding to a plurality of water contents in the goaf model are respectively calculated, wherein each group of induced electromotive forces includes a plurality of induced electromotive forces corresponding to a plurality of sampling times; The corresponding relationship is determined according to the calculated induced electromotive force.
[0006] Optionally, the geological data for determining the goaf model includes: Determine the geological data of the target goaf as the geological data of the goaf model.
[0007] Optionally, the corresponding relationship is the corresponding relationship between the water accumulation rate of the goaf and the maximum value of the increase in the induced electromotive force.
[0008] The present disclosure also provides a device for determining the water accumulation rate of a coal mine goaf, the device comprising: A first acquisition module, configured to acquire the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase in the induced electromotive force, where the extreme value of the increase in the induced electromotive force is the extreme value of the increase in the induced electromotive force obtained by the transient electromagnetic method relative to the reference induced electromotive force, and the reference induced electromotive force is the induced electromotive force obtained by the transient electromagnetic method when the water accumulation rate of the goaf is zero; A second acquisition module, configured to acquire the induced electromotive force corresponding to the target goaf detected by the transient electromagnetic method; A determination module, configured to determine the water accumulation rate of the target goaf according to the extreme value of the increase in the induced electromotive force corresponding to the target goaf and the corresponding relationship.
[0009] Optionally, the first acquisition module includes: A first determination sub-module, configured to determine the geological data of the goaf model, where the goaf model includes the water content rate, depth, and resistivity of the goaf; An acquisition sub-module, configured to acquire the working parameters of the transient electromagnetic method detection device; A calculation sub-module, configured to calculate multiple groups of induced electromotive forces corresponding to multiple water content rates in the goaf model according to the geological data and the working parameters, where each group of induced electromotive forces includes multiple induced electromotive forces corresponding to multiple sampling times; A second determination sub-module, configured to determine the corresponding relationship according to the calculated induced electromotive force.
[0010] Optionally, the first determination sub-module is configured to determine the geological data of the target goaf as the geological data of the goaf model.
[0011] Optionally, the corresponding relationship is the corresponding relationship between the water accumulation rate of the goaf and the maximum value of the increase in the induced electromotive force.
[0012] The present disclosure also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method provided by the present disclosure are implemented.
[0013] The present disclosure also provides an electronic device, including: A memory, on which a computer program is stored; A processor for executing the computer program in the memory to implement the steps of the above method provided by the present disclosure.
[0014] Through the above technical solution, the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase in the induced electromotive force is obtained; the induced electromotive force corresponding to the target goaf detected by the transient electromagnetic method is obtained; according to the extreme value of the increase in the induced electromotive force corresponding to the target goaf and the corresponding relationship, the water accumulation rate of the target goaf is determined. In this way, according to the pre-determined corresponding relationship, the water accumulation rate corresponding to the detected induced electromotive force can be directly found in the corresponding relationship, and the method is simple, the processing speed is fast, and the accuracy is good.
[0015] Other features and advantages of the present disclosure will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation manners, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 is a flowchart of a method for determining the water accumulation rate of a coal mine goaf provided by an exemplary embodiment; Figure 2 is a schematic structural diagram of a goaf model provided by an exemplary embodiment; Figure 3 is a curve graph of the induced electromotive force corresponding to different resistivities provided by an exemplary embodiment; Figure 4 is a curve graph of the induced electromotive force corresponding to different water contents provided by an exemplary embodiment; Figure 5 is a curve graph of the increase in the induced electromotive force corresponding to different water contents provided by an exemplary embodiment; Figure 6 is a curve graph of the induced electromotive force before and after grouting in a coal mine goaf provided by an exemplary embodiment; Figure 7 is a block diagram of a device for determining the water accumulation rate of a coal mine goaf provided by an exemplary embodiment; Figure 8 is a block diagram of an electronic device shown by an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following will describe in detail the specific implementation manners of the present disclosure with reference to the drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.
[0018] It should be noted that all actions of obtaining signals, information, or data in this disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and with the authorization given by the owner of the corresponding device.
[0019] Figure 1 is a flowchart of a method for determining the water accumulation rate in a coal mine gob area provided by an exemplary embodiment. As Figure 1 shown, the method for determining the water accumulation rate in a coal mine gob area includes the following steps.
[0020] S101, obtain the corresponding relationship between the water accumulation rate in the gob area and the extreme value of the increase in the induced electromotive force. The extreme value of the increase in the induced electromotive force is the extreme value of the increase in the induced electromotive force obtained by the transient electromagnetic method relative to the reference induced electromotive force, and the reference induced electromotive force is the induced electromotive force obtained by the transient electromagnetic method when the water accumulation rate in the gob area is zero.
[0021] S102, obtain the induced electromotive force corresponding to the target gob area detected by the transient electromagnetic method.
[0022] S103, determine the water accumulation rate in the target gob area according to the extreme value of the increase in the induced electromotive force corresponding to the target gob area and the corresponding relationship.
[0023] In the related art, the induced electromotive force can be detected by the transient electromagnetic method. The increase in the induced electromotive force is the ratio of the difference between the current induced electromotive force corresponding to the current water accumulation rate and the reference induced electromotive force to the reference induced electromotive force. The increase can be greater than or equal to zero. The extreme value can include the maximum value and the minimum value.
[0024] The corresponding relationship between the water accumulation rate in the gob area and the extreme value of the increase in the induced electromotive force can be pre-calibrated. Since there is a strong correlation between the water accumulation rate in the gob area and the increase in the induced electromotive force under the same geological structure, therefore, on the basis of detecting the induced electromotive force by the transient electromagnetic method, as long as the extreme value of the increase in the induced electromotive force is determined, the water accumulation rate in the gob area can be easily found using the corresponding relationship.
[0025] Among them, the same geological structure means that parameters such as the overlying layer of the gob area, the height of the gob area, the height of the air above the gob area, and the height of the water layer below are the same.
[0026] Through the above technical solution, obtain the corresponding relationship between the water accumulation rate in the gob area and the extreme value of the increase in the induced electromotive force; obtain the induced electromotive force corresponding to the target gob area detected by the transient electromagnetic method; determine the water accumulation rate in the target gob area according to the extreme value of the increase in the induced electromotive force corresponding to the target gob area and the corresponding relationship. In this way, according to the pre-determined corresponding relationship, the water accumulation rate corresponding to the detected induced electromotive force can be directly found in the corresponding relationship, the method is simple, the processing speed is fast, and the accuracy is good.
[0027] In another embodiment, obtaining the corresponding relationship between the water accumulation rate in the goaf and the extreme value of the increase in the induced electromotive force includes: Determine the geological data of the goaf model, where the goaf model includes the water content rate and depth of the goaf; Obtain the working parameters of the transient electromagnetic detection device; Calculate multiple induced electromotive forces corresponding to multiple water content rates in the goaf model respectively according to the geological data and the working parameters; Determine the corresponding relationship according to the calculated induced electromotive force.
[0028] Figure 2 is a schematic structural diagram of the goaf model provided by an exemplary embodiment. As Figure 2 shown, below the ground surface, the thickness h1 of the overlying layer (surrounding rock) of the goaf is, for example, 80m, and the resistivity = 100Ω·m, the height h2 of the goaf is 20m, and the water content rate γ can be set to include eleven cases increasing from 0% to 100% at intervals of 10%. The upper air layer is set to be high-resistance, and its resistivity = 10 5 Ω·m, the lower water layer is set to be low-resistance, and its resistivity = 10Ω·m. The thickness h3 of the bottom plate is an infinite value, and the resistivity = 100Ω·m. When performing forward calculation, a central loop device can be used, the side length of the transmitting wire frame is 200m, the area of the receiving wire frame is 100m 2 , the time series is 41 channels logarithmically equally spaced from 1µs to 10ms (corresponding to 41 sampling times), and the sampling time is t = 10 -6 ~10 0 seconds, and the sampling interval is an exponential interval.
[0029] Among them, determining the geological data of the goaf model may include: determining the geological data of the target goaf as the geological data of the goaf model. The existing geological geophysical exploration data of the target goaf can be investigated, combined with the data of boreholes and resistivity logging, to determine the goaf model, calculate multiple induced electromotive forces corresponding to multiple water content rates in the goaf model, and perform forward calculation.
[0030] The working parameters of the transient electromagnetic detection device may, for example, include the side length of the transmitting wire frame, the current intensity in the transmitting wire frame, etc.
[0031] Calculate multiple groups of induced electromotive forces corresponding to multiple water content rates in the goaf model respectively according to the geological data and the working parameters, and each group of induced electromotive forces includes multiple induced electromotive forces corresponding to multiple sampling times.
[0032] First, the relationship between the water content and resistivity in the goaf model can be set as follows: Assume the depth of the goaf is h2, the thickness of the aquifer in the goaf is , and the thickness of the air layer in the goaf is . Set the air layer as high resistivity (for example, resistivity is 10 5 Ω·m), and the aquifer as low resistivity (for example, resistivity is 10Ω·m). When performing forward modeling based on the goaf model, it is equivalent to knowing the resistivity (known water content) at each depth and solving for the induced electromotive force.
[0033] First, satisfy the following formula (1) (1) where is the exploration depth, is the resistivity at time , and is the delay time (sampling time). According to the depths of each layer in the goaf model, select the time window -6 = 10 -2 s as the observation time window.
[0034] According to the following formula (2), calculate the derivative of the magnetic induction intensity with respect to time: (2) where dB / dt is the derivative of the magnetic induction intensity with respect to time, B is the magnetic induction intensity, is the kernel function feature, is the side length of the transmitting wire frame, is the current intensity in the transmitting wire frame. (3) (4) (5) where is the error function, is the magnetic permeability of the medium, and its value can be taken as 4π×10 -7 H / m. In practical applications, using the data in the late stage of attenuation, as the value increases, the value changes. When << 1, expand and using the first three terms of the Taylor series to meet the calculation accuracy requirements. The formula is as follows: (6) (7) Substituting formula (6) and formula (7) into formula (2) gives: (8) Calculated according to formula (8) dB / dt After that, combined with the coil area, the induced electromotive force can be calculated. After multiple calculations, the induced electromotive forces corresponding to different water contents are obtained.
[0035] Figure 3 It is a curve graph of the induced electromotive forces corresponding to different resistivities provided by an exemplary embodiment. Figure 3 In it, the abscissa is the sampling time and the ordinate is the induced electromotive force. The curve "100Ω / 20Ω / 200Ω" represents the induced electromotive force corresponding to each sampling time when the resistivity of the overlying layer (surrounding rock) above the goaf, the resistivity of the water layer in the goaf, and the resistivity of the floor below the goaf are 100Ω·m, 10Ω·m, and 200Ω·m respectively.
[0036] The curve "half - space 100Ω" is a set of induced electromotive forces, indicating the induced electromotive force corresponding to each sampling time if the resistivity of the half - space below the ground is 100Ω.
[0037] The curve "half - space 10Ω" is a set of induced electromotive forces, indicating the induced electromotive force corresponding to each sampling time if the resistivity of the half - space below the ground is 10Ω.
[0038] The curve "half - space 200Ω" is a set of induced electromotive forces, indicating the induced electromotive force corresponding to each sampling time if the resistivity of the half - space below the ground is 200Ω.
[0039] It can be seen that in the early sampling stage (corresponding to the surrounding rock stage), the curve "100Ω / 10Ω / 200Ω" basically coincides with the curve "half - space 100Ω". In the middle sampling stage (corresponding to the goaf stage), the curve "100Ω / 10Ω / 200Ω" has a certain increase on the basis of the curve "half - space 100Ω" and is between the curve "half - space 100Ω" and the curve "half - space 10Ω".
[0040] Figure 4 It is a curve graph of the induced electromotive forces corresponding to different water contents provided by an exemplary embodiment. Figure 4 In it, the abscissa is the sampling time and the ordinate is the induced electromotive force. Figure 4 The curves showing the variation of the induced electromotive force with the sampling time for water contents at intervals of 10% from 0% to 100% are shown. One curve of water content represents a set of induced electromotive forces, which is formed by connecting the induced electromotive forces corresponding to multiple sampling times.
[0041] Figure 4 Among them, h1 is 80m, and the depth of the goaf floor is 100m. It can be seen that the transient electromagnetic responses of goafs with different water contents are significantly different. Except for individual cases (γ = 10%), there are also obvious differences from the solid coal seam (i.e., homogeneous half-space). Before 0.1ms, the curves basically coincide, indicating that the resistivities in the shallow part are basically the same; between 0.1 and 1ms, as the water content γ increases, the induced electromotive force also increases; after 1ms, the curves gradually tend to coincide again, reflecting that the resistivities in deeper parts are close.
[0042] Figure 5 It is a graph showing the increase amplitude of the induced electromotive force corresponding to different water contents provided by an exemplary embodiment. Figure 5 Among them, the abscissa is the sampling time, and the ordinate is the increase amplitude of the induced electromotive force. The increase amplitude of the induced electromotive force is the increase amplitude based on a water content of 0%. This increase amplitude can be expressed as a percentage, that is, the current induced electromotive force minus the induced electromotive force at a water content of 0%, and then divided by the induced electromotive force at a water content of 0%.
[0043] As Figure 5 shown, when the goaf is water-free, as the underground induced eddy current propagates and decays, first an extreme value of the increase amplitude caused by the interference of reflected waves appears, and then it gradually decreases to a minimum value, but the amplitude of the minimum value is larger than that of the maximum value. When the water content of the goaf is 10%, under the combined action of the high-resistance air layer and the low-resistance water accumulation layer, the curve of its induced electromotive force is very close to the curve when there is no goaf (water content is 0%), and both the increase amplitude and the decrease amplitude are not obvious. When the water content of the goaf increases or decreases to 20%, a minimum value caused by the interference of reflected waves appears, and then it gradually increases to a maximum value, and the amplitude of the maximum value is much larger than that of the minimum value, indicating that the low-resistance water accumulation starts to play a dominant role at this time, and it also shows that compared with high-resistance bodies, transient electromagnetic is more sensitive to low-resistance bodies; thereafter, as the water accumulation rate in the goaf increases, the curve characteristics basically remain unchanged, but the values of the extreme values gradually increase. At the same time, since the propagation speed of the transient electromagnetic wave field is inversely proportional to the resistivity, as the water accumulation rate in the goaf increases, the time when the extreme values appear becomes later and later. The transient electromagnetic response is mainly determined by the roof function at the ground surface, and the main parameters determining the transient electromagnetic response are the resistivity ratio and thickness ratio of the upper two strata (surrounding rock stratum and goaf). From Figure 5 it can be seen that it is feasible to infer the water accumulation rate in the goaf based on the extreme values of the increase amplitude of the induced electromotive force.
[0044] And, from Figure 5 it can be seen that although both the maximum value and the minimum value can infer the water accumulation rate in the goaf, the difference in the maximum value is greater, and it is easier to distinguish different water accumulation rates using the maximum value. Therefore, in another embodiment, the corresponding relationship is the corresponding relationship between the water accumulation rate in the goaf and the maximum value of the increase amplitude of the induced electromotive force.
[0045] In this solution, goaf models with different depths and different water accumulation rates are established to conduct one-dimensional forward simulation on the transient electromagnetic response eigenvalues of the goaf. Since there is a second-order polynomial relationship between the water accumulation rate and the extreme value of the increase in induced electromotive force, the extreme value of the increase in transient electromagnetic induced electromotive force is used to determine the water accumulation in the goaf, and the evaluation method is reliable, which is of great significance for the safe production of coal mines.
[0046] In order to verify the evaluation effect of using transient electromagnetic method for the water accumulation rate in the goaf, in the coal mine field, transient electromagnetic method was used to conduct the inspection by filling the goaf with water-rich materials. The goafs around the site were grouted, and the slurry selected was the ultra-high water material with a water content of over 90%. Transient electromagnetic detection was carried out once before and after grouting respectively. The coal seam dip angle is about 20°, the mining depth is about 200 - 250m, and the cumulative mining thickness is about 5m.
[0047] Figure 6 It is the curve graph of the induced electromotive force before and after grouting in the coal mine goaf provided by an exemplary embodiment. According to the comparison of the detection results before and after grouting, the goaf was basically water-free before grouting, and the resistivity decreased significantly after grouting, inferring that it has been filled with slurry, and multiple slurry gushing points nearby also support this inference. Since the water content of the ultra-high water material exceeds 90%, the goaf after grouting can be regarded as a goaf with a water content of 100%.
[0048] In Figure 6 the experiment, the induced electromotive force before grouting began to increase significantly compared with that after grouting at about 10ms. According to the forward data, if the induced electromotive force after grouting is taken as the reference, the maximum value of the increase in the induced electromotive force before grouting is about 247%, while in the measured data, the maximum value of the increase in the induced electromotive force before grouting is about 233%, and the relative error between the two is about -5.67%, which is within the allowable range.
[0049] According to the same inventive concept, the present disclosure also provides a device for determining the water accumulation rate in a coal mine goaf. Figure 7 It is the block diagram of the device 700 for determining the water accumulation rate in a coal mine goaf provided by an exemplary embodiment. As Figure 7 shown, the device 700 for determining the water accumulation rate in a coal mine goaf may include a first acquisition module 701, a second acquisition module 702, and a determination module 703.
[0050] The first acquisition module 701 is used to acquire the corresponding relationship between the water accumulation rate in the goaf and the extreme value of the increase in the induced electromotive force. The extreme value of the increase in the induced electromotive force is the extreme value of the increase in the induced electromotive force obtained by the transient electromagnetic method relative to the reference induced electromotive force, and the reference induced electromotive force is the induced electromotive force obtained by the transient electromagnetic method when the water accumulation rate in the goaf is zero.
[0051] The second acquisition module 702 is configured to acquire the induced electromotive force corresponding to the target goaf detected by the transient electromagnetic method.
[0052] The determination module 703 is configured to determine the water accumulation rate of the target goaf according to the extreme value of the increase amplitude of the induced electromotive force corresponding to the target goaf and the corresponding relationship.
[0053] Optionally, the first acquisition module 701 includes a first determination sub-module, an acquisition sub-module, a calculation sub-module, and a second determination sub-module.
[0054] The first determination sub-module is configured to determine the geological data of the goaf model, where the goaf model includes the water content rate, depth, and resistivity of the goaf. The acquisition sub-module is configured to acquire the working parameters of the transient electromagnetic method detection device. The calculation sub-module is configured to calculate multiple groups of induced electromotive forces corresponding to multiple water content rates in the goaf model respectively according to the geological data and the working parameters, and each group of induced electromotive forces includes multiple induced electromotive forces corresponding to multiple sampling times. The second determination sub-module is configured to determine the corresponding relationship according to the calculated induced electromotive force.
[0055] Optionally, the first determination sub-module is configured to determine the geological data of the target goaf as the geological data of the goaf model.
[0056] Optionally, the corresponding relationship is the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase amplitude of the induced electromotive force.
[0057] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.
[0058] Through the above technical solutions, the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase amplitude of the induced electromotive force is obtained; the induced electromotive force corresponding to the target goaf detected by the transient electromagnetic method is obtained; and the water accumulation rate of the target goaf is determined according to the extreme value of the increase amplitude of the induced electromotive force corresponding to the target goaf and the corresponding relationship. In this way, according to the pre-determined corresponding relationship, the water accumulation rate corresponding to the detected induced electromotive force can be directly found in the corresponding relationship, and the method is simple, the processing speed is fast, and the accuracy is good.
[0059] The present disclosure also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method provided by the present disclosure are implemented.
[0060] The present disclosure also provides an electronic device, including: A memory, on which a computer program is stored; A processor for executing the computer program in the memory to implement the steps of the above method provided by the present disclosure.
[0061] Figure 8 is a block diagram of an electronic device 800 shown in an exemplary embodiment. As Figure 8 shown, the electronic device 800 may include: a processor 801, a memory 802. The electronic device 800 may further include one or more of a multimedia component 803, an input / output (I / O) interface 804, and a communication component 805.
[0062] Among them, the processor 801 is used to control the overall operation of the electronic device 800 to complete all or part of the steps in the above-mentioned method for determining the water accumulation rate in the goaf of a coal mine. The memory 802 is used to store various types of data to support the operation of the electronic device 800. These data may include, for example, instructions for any application or method operating on the electronic device 800, as well as application-related data, such as contact data, received and sent messages, pictures, audio, video, and so on. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G, etc., or a combination of one or more of them is not limited here. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, an NFC module, and so on.
[0063] In an exemplary embodiment, the electronic device 800 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is used to execute the above method for determining the water accumulation rate in the goaf of a coal mine.
[0064] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When the program instructions are executed by a processor, the steps of the above method for determining the water accumulation rate in the goaf of a coal mine are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 802 including program instructions, and the above program instructions can be executed by the processor 801 of the electronic device 800 to complete the above method for determining the water accumulation rate in the goaf of a coal mine.
[0065] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program that can be executed by a programmable device, and the computer program has a code part for executing the above method for determining the water accumulation rate in the goaf of a coal mine when executed by the programmable device.
[0066] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0067] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination methods.
[0068] Furthermore, any combination can be made between different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.
Claims
1. A method for determining the water accumulation rate of coal mine goaf, characterized in that: The method comprises: Obtaining the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase of the induced electromotive force, wherein the extreme value of the increase of the induced electromotive force is the extreme value of the increase of the induced electromotive force obtained by the transient electromagnetic method relative to the reference induced electromotive force, and the reference induced electromotive force is the induced electromotive force obtained by the transient electromagnetic method when the water accumulation rate of the goaf is zero; Obtaining the induced electromotive force corresponding to the target goaf area detected by transient electromagnetic method; The water accumulation rate of the target goaf is determined according to the maximum value of the increase of the induced electromotive force corresponding to the target goaf and the corresponding relationship.
2. The method according to claim 1, characterized in that The method of obtaining the corresponding relationship between the water accumulation rate of the goaf and the maximum value of the increase of the induced electromotive force includes: Determining geological data of a goaf model, the goaf model including water content, depth and resistivity of the goaf; Obtaining the working parameters of the transient electromagnetic method detection device; According to the geological data and the working parameters, a plurality of groups of induced electromotive forces corresponding to a plurality of water contents in the goaf model are respectively calculated, wherein each group of induced electromotive forces includes a plurality of induced electromotive forces corresponding to a plurality of sampling times; The corresponding relationship is determined according to the calculated induced electromotive force.
3. The method according to claim 2, characterized in that The geological data for determining the goaf model include: The geological data of the target goaf is determined as the geological data of the goaf model.
4. The method according to claim 1, characterized in that: The corresponding relationship is the corresponding relationship between the water accumulation rate of the goaf and the maximum increase value of the induced electromotive force.
5. A device for determining the water accumulation rate of coal mine goaf, characterized in that: The device comprises: The first acquisition module is used to obtain the corresponding relationship between the water accumulation rate of the goaf and the extreme value of the increase of the induced electromotive force, wherein the extreme value of the increase of the induced electromotive force is the extreme value of the increase of the induced electromotive force obtained by the transient electromagnetic method relative to the reference induced electromotive force, and the reference induced electromotive force is the induced electromotive force obtained by the transient electromagnetic method when the water accumulation rate of the goaf is zero; The second acquisition module is used to acquire the induced electromotive force corresponding to the target goaf detected by transient electromagnetic method; The determination module is used to determine the water accumulation rate of the target goaf area according to the maximum increase value of the induced electromotive force corresponding to the target goaf area and the corresponding relationship.
6. The device according to claim 5, characterized in that The first acquisition module includes: A first determination submodule is used to determine geological data of a goaf model, wherein the goaf model includes water content, depth and resistivity of the goaf; An acquisition submodule is used to acquire the working parameters of the transient electromagnetic method detection device; A calculation submodule, for respectively calculating a plurality of groups of induced electromotive forces corresponding to a plurality of water contents in the goaf model according to the geological data and the working parameters, wherein each group of induced electromotive forces includes a plurality of induced electromotive forces corresponding to a plurality of sampling times; The second determining submodule is used to determine the corresponding relationship according to the calculated induced electromotive force.
7. The device according to claim 6, characterized in that The first determination submodule is used to determine the geological data of the target goaf as the geological data of the goaf model.
8. The device according to claim 5, characterized in that The corresponding relationship is the corresponding relationship between the water accumulation rate of the goaf and the maximum increase value of the induced electromotive force.
9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.
10. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 4.