Rockfall monitoring method and device based on wide-area electric seismic amplitude-frequency, equipment and medium

Abstract

The present application belongs to the field of dangerous rock monitoring, and provides a dangerous rock monitoring method, device, equipment and medium based on wide-area electric shock amplitude-frequency, which comprises high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring on the dangerous rock monitoring area; whether there is a resistivity difference anomaly and whether an electromagnetic radiation anomaly event occurs are confirmed based on high-frequency wide-area electromagnetic data at different time points; whether there is a velocity structure difference anomaly and whether a vibration anomaly event occurs are confirmed based on micro-motion data at different time points; when the electromagnetic radiation anomaly event and the vibration anomaly event are synchronous in occurrence time and consistent in spatial positioning, it is confirmed that it is a rock breaking event. Through various detection means, wide-band range real-time monitoring of electromagnetic signals and vibration signals is realized, abnormal signals generated by internal changes of rocks can be maximally detected and recognized, the dangerous rock disaster gestation process can be effectively monitored, and the missed report of geological disasters is reduced and the success rate of early warning is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of dangerous rock monitoring, and particularly relates to a dangerous rock monitoring method, device, equipment and medium based on wide-area electric shock amplitude-frequency. BACKGROUND

[0002] As a common geological disaster, dangerous rock collapse has the characteristics of complex causes, wide distribution, strong concealment and suddenness, and great harmfulness, and early warning thereof has always been a challenge.

[0003] Dangerous rock monitoring technology is developing towards integration, intelligence and automation, and dangerous rock monitoring research mainly concentrates on two fields (above water surface): deformation monitoring and macroscopic precursor monitoring.

[0004] Deformation monitoring technology includes ground three-dimensional laser scanning, INSAR, GNSS and the like, can realize millimeter-level measurement accuracy, and can perform risk assessment and early warning through a digital model, but deformation and dangerous rock disasters do not constitute a sufficient condition relationship.

[0005] Macroscopic precursor monitoring, especially monitoring of a dangerous rock structure surface disaster gestation process, mainly includes cross-hole acoustic CT and downhole camera, and can only solve the monitoring problem between holes, and existing other internal monitoring technologies and equipment have insufficient monitoring accuracy.

[0006] In summary, the existing dangerous rock monitoring technology still mainly relies on surface monitoring, and internal monitoring has insufficient accuracy, and it is a technical problem urgently needed to be solved to construct a multi-source collaborative three-dimensional monitoring system. SUMMARY

[0007] In view of the problems in the prior art, the application provides a dangerous rock monitoring method, device, equipment and medium based on wide-area electric shock amplitude-frequency, aiming to solve the technical problems of accurate detection of a dangerous rock structure surface, tracking of a property degradation process and real-time monitoring of development characteristics.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the application is as follows:

[0009] On one hand, the application provides a dangerous rock monitoring method based on wide-area electric shock amplitude-frequency, comprising the following steps:

[0010] Obtaining high-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals synchronously collected when performing high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring on a dangerous rock monitoring area;

[0011] Based on the high-frequency wide-area electromagnetic data at different time points, the underground overall resistivity structure of the dangerous rock monitoring area at different time points is obtained, the current resistivity differential information is calculated according to the time difference principle, when the current resistivity differential information exceeds the first warning critical value, the current resistivity differential is abnormal, it is considered that the electromagnetic radiation abnormal event occurs, and the current collected electromagnetic radiation signal is the electromagnetic radiation signal generated by the suspected rock breaking;

[0012] Based on the micro-motion data at different time points, the underground overall velocity structure of the dangerous rock monitoring area at different time points is obtained, the current velocity structure differential information is calculated according to the time difference principle, when the current velocity structure differential information exceeds the second warning critical value, the current velocity structure differential is abnormal, it is considered that the vibration abnormal event occurs, and the vibration signal generated by the suspected rock breaking is confirmed based on the current collected vibration signal;

[0013] The electromagnetic radiation signal and the vibration signal are jointly monitored and positioned, when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and the spatial positioning of the electromagnetic radiation abnormal event source position and the vibration abnormal event source position is consistent, it is confirmed that it is a rock breaking event.

[0014] On the other hand, the application provides a dangerous rock monitoring device based on wide-area electric shock amplitude frequency, comprising:

[0015] The first module is used for obtaining the high-frequency wide-area electromagnetic data, the electromagnetic radiation signal, the micro-motion data and the vibration signal collected synchronously when the dangerous rock monitoring area is detected by high-frequency wide-area electromagnetic method, the electromagnetic radiation is monitored, the micro-motion is detected and the vibration signal is monitored;

[0016] The second module is used for obtaining the underground overall resistivity structure of the dangerous rock monitoring area at different time points based on the high-frequency wide-area electromagnetic data at different time points, calculating the current resistivity differential information according to the time difference principle, when the current resistivity differential information exceeds the first warning critical value, the current resistivity differential is abnormal, it is considered that the electromagnetic radiation abnormal event occurs, and the current collected electromagnetic radiation signal is the electromagnetic radiation signal generated by the suspected rock breaking;

[0017] The third module is used for obtaining the underground overall velocity structure of the dangerous rock monitoring area at different time points based on the micro-motion data at different time points, calculating the current velocity structure differential information according to the time difference principle, when the current velocity structure differential information exceeds the second warning critical value, the current velocity structure differential is abnormal, it is considered that the vibration abnormal event occurs, and the vibration signal generated by the suspected rock breaking is confirmed based on the current collected vibration signal;

[0018] A fourth module is configured to jointly monitor and locate based on the electromagnetic radiation signal and the vibration signal, and when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and the spatial locations of the electromagnetic radiation abnormal event source and the vibration abnormal event source are consistent, it is determined that the event is a rock breaking event.

[0019] In another aspect, the present application provides an electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the steps of the rockfall monitoring method based on wide-area electric seismic amplitude-frequency when executing the computer program.

[0020] In another aspect, the present application provides a computer readable storage medium storing a computer program, and the computer program implements the steps of the rockfall monitoring method based on wide-area electric seismic amplitude-frequency when executed by a processor.

[0021] In another aspect, the present application provides a computer program product stored on a computer readable storage medium and comprising computer instructions which, when executed by a processor, cause a computer device to implement the steps of the rockfall monitoring method based on wide-area electric seismic amplitude-frequency.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] The rockfall monitoring method based on wide-area electric seismic amplitude-frequency fuses the monitoring data collected by high-frequency wide-area electromagnetic method, microseismic (surface wave) method, electromagnetic radiation monitoring and vibration (elastic wave and acoustic emission) monitoring, aiming to solve the technical problems of accurate detection of rockfall structure surface, tracking of deterioration process and real-time monitoring of development characteristics. The present application performs high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, microseismic detection and vibration signal monitoring on the rockfall monitoring area; based on the high-frequency wide-area electromagnetic data at different time points, it determines whether there is a resistivity difference anomaly and whether an electromagnetic radiation abnormal event occurs; based on the microseismic data at different time points, it determines whether there is a velocity structure difference anomaly and whether a vibration abnormal event occurs; when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and the spatial locations are consistent, it is determined that the event is a rock breaking event. Through the mutual intersection of the four detection methods, wide-band real-time monitoring of electromagnetic signals and vibration signals can be achieved, which can maximize the detection and identification of abnormal signals caused by internal changes of rocks, effectively monitor the rockfall disaster process, reduce the missed report of geological disasters and improve the success rate of early warning.

[0024] Specifically, the present application provides a dangerous rock monitoring method based on wide-area electric shock amplitude frequency. High-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals synchronously collected during high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring of a dangerous rock monitoring area can reflect resistivity and velocity structure changes of a rock mass in a long-term and gradual deterioration process, and can be combined with vibration and electromagnetic radiation signals reflecting instantaneous and sudden rupture events, so that complete disaster evolution chain monitoring from slow quantitative change to instantaneous qualitative change is realized, and the depth and breadth of monitoring are greatly improved.

[0025] By introducing a time difference principle to dynamically track underground resistivity structure and velocity structure, rock mass physical property deterioration trends caused by crack occurrence and development can be identified before rock rupture (vibration and electromagnetic radiation) occurs. Compared with a monitoring method that only relies on rock rupture event signals, this early warning based on rock mass physical property changes provides more advanced early warning information.

[0026] The present application can determine abnormal events and accurately give the spatial coordinate position of the abnormal event occurrence position through a positioning algorithm. The present application requires that electromagnetic radiation abnormal events and vibration abnormal events are synchronous in time and homologous in space, and only then is a rock breaking event confirmed to be effective. This strict joint determination mechanism can effectively distinguish real signals generated by rock rupture from non-disaster signals such as environmental noise and interference, thereby significantly improving the confidence of disaster identification. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without creative labor.

[0028] Figure 1 A flowchart of a dangerous rock monitoring method based on wide-area electric shock amplitude frequency provided by an embodiment;

[0029] Figure 2 A layout diagram of a sensor in an embodiment;

[0030] Figure 3 A rock breaking event monitoring and positioning flowchart in an embodiment. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] With reference to Figure 1 In an embodiment, a dangerous rock monitoring method based on wide-area electric shock amplitude-frequency is provided, comprising the following steps:

[0033] High-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals synchronously collected when high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring are performed on the dangerous rock monitoring area are acquired.

[0034] Based on the high-frequency wide-area electromagnetic data at different time points, the underground overall resistivity structure of the dangerous rock monitoring area at different time points is obtained, the current resistivity difference information is calculated according to the time difference principle, and when the current resistivity difference information exceeds a first early warning critical value, the current resistivity difference is abnormal, and it is considered that an electromagnetic radiation abnormal event occurs, and the currently collected electromagnetic radiation signal is the electromagnetic radiation signal generated by suspected rock breaking;

[0035] Based on the micro-motion data at different time points, the underground overall velocity structure of the dangerous rock monitoring area at different time points is obtained, the current velocity structure difference information is calculated according to the time difference principle, and when the current velocity structure difference information exceeds a second early warning critical value, the current velocity structure difference is abnormal, and it is considered that a vibration abnormal event occurs, and the vibration signal generated by suspected rock breaking is confirmed based on the currently collected vibration signal;

[0036] The electromagnetic radiation signal and the vibration signal are jointly monitored and positioned, and when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and the spatial positioning of the electromagnetic radiation abnormal event source position and the vibration abnormal event source position is consistent, it is confirmed that it is a rock breaking event.

[0037] The present application can realize high-precision and rapid imaging of the dangerous rock structure surface, time-lapse monitoring, abnormal source dynamic capture and spatial positioning through multi-source integration and real-time coupling of four types of methods of high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring, so as to improve the all-around monitoring and early warning capability of the dangerous rock disaster gestation evolution process, reduce the false report and improve the early warning success rate.

[0038] The application integrates high-frequency wide-area electromagnetic and micro-motion detection technology, electromagnetic radiation signal and vibration signal monitoring technology generated in the rock damage process, realizes real-time tracking of the physical property distribution and deterioration process of the internal structural surface of the dangerous rock, realizes the breakthrough from "apparent monitoring" to "internal monitoring", and improves the physical authenticity of the early warning.

[0039] The application can not only realize high-precision and rapid imaging of the dangerous rock structural surface through high-frequency wide-area electromagnetic detection and micro-motion detection, and dynamically track the evolution process of the structural surface deterioration using the time difference principle, but also can integrate electromagnetic radiation signals and vibration signals during the deterioration expansion process to realize instantaneous dynamic capture and spatial accurate positioning of abnormal sources. At the same time, the electromagnetic radiation abnormal event and the vibration abnormal event are required to be synchronous in time and homologous in space, and only then can the effective rock breaking event be confirmed, the environmental noise interference is effectively inhibited, the false alarm rate is significantly reduced, and the reliability of the early warning is improved.

[0040] In an embodiment, referring to Figure 2 , the high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring of the dangerous rock monitoring area are realized through the high-frequency wide-area transmitting coil, wide-area electric shock amplitude frequency monitor, vibration sensor and electromagnetic receiving coil arranged in the dangerous rock monitoring area.

[0041] In an embodiment, the high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring of the dangerous rock monitoring area are realized through the high-frequency wide-area electromagnetic method transmitting coil and receiving coil arranged in the dangerous rock monitoring area and the seismic signal monitoring station, wherein the high-frequency wide-area electromagnetic detection and electromagnetic radiation monitoring share the receiving coil arranged in the dangerous rock monitoring area.

[0042] The resistivity information of the dangerous rock monitoring area is detected by using the high-frequency wide-area electromagnetic method, and the underground overall resistivity structure change of the dangerous rock monitoring area is monitored according to the detection difference in the time dimension. Considering the factors such as the slope dangerous rock topography of high gorge steep valley, the layout condition, the power supply stability and sustainability and the like, the non-grounded wide-area electromagnetic detection and time difference monitoring technology of magnetic source excitation and coil receiving are used. The resistivity information of the dangerous rock monitoring area is detected by using the non-grounded wide-area electromagnetic detection method, and the underground overall resistivity structure of the dangerous rock monitoring area, i.e. the resistivity distribution map of the underground overall resistivity structure of the dangerous rock monitoring area, is obtained. The time difference monitoring mainly uses the underground overall resistivity structure of the dangerous rock monitoring area at different time points to monitor and identify the difference abnormal signal caused by the underground lithology change. When the current resistivity difference information exceeds the first early warning critical value, the current resistivity difference anomaly occurs.

[0043] The present application is used for micro-dynamic detection and vibration signal monitoring in the dangerous rock monitoring area. The micro-dynamic detection uses multi-point dispersion curve extraction and imaging technology to detect the underground overall velocity structure of the dangerous rock monitoring area, and monitors the elastic deformation of the underground abnormal body of the dangerous rock monitoring area according to the detection difference in the time dimension. Specifically, a micro-dynamic station array is arranged in the dangerous rock monitoring area, the micro-dynamic signals collected by the micro-dynamic station array are used to extract Rayleigh wave dispersion curves by methods such as spatial autocorrelation (SPAC) and frequency-wavenumber (FK), and the underground overall velocity structure of the dangerous rock monitoring area is obtained through inversion calculation. At the same time, the micro-dynamic detection can be combined with non-grounded wide-area electromagnetic detection to obtain the overall geological structure of the dangerous rock monitoring area. The micro-dynamic monitoring principle is similar to the non-grounded high-frequency wide-area electromagnetic method, which mainly uses the difference between the detection results at different times to identify the physical property change process of the underground abnormal body. Based on the micro-dynamic data at different time points, the underground overall velocity structure of the dangerous rock monitoring area at different time points is obtained, and the current velocity structure difference information is calculated according to the time difference principle. When the current velocity structure difference information exceeds the second warning critical value, the current velocity structure difference is abnormal.

[0044] The micro-dynamic station is used to collect the transient elastic waves, i.e. acoustic emission signals, generated in the rock damage and destruction process. The frequency and amplitude characteristics of the acoustic emission signals generated by different reasons (including slip deformation, crack closure, twinning deformation, inclusion and crack formation and propagation, etc.) are different, and different acoustic emission signals generated in the rock can be identified by data analysis means. In addition, the vibration signals generated in the rock due to damage and destruction are accompanied by electromagnetic radiation, and the amplitude-frequency characteristics of the electromagnetic radiation signals generated by rock breaking due to different reasons are different. The electromagnetic radiation signals are received by the electromagnetic receiver, and the electromagnetic radiation signals caused by different internal causes are identified by data analysis means.

[0045] In the process of damage and destruction of dangerous rock, the transient elastic waves, i.e. acoustic emission signals, generated in the rock damage and destruction process and the accompanying electromagnetic radiation signals are collected. Through joint analysis of frequency and amplitude characteristics, abnormal signals caused by different internal causes (such as crack propagation, slip, twinning deformation, etc.) can be distinguished, and spatial dynamic positioning of abnormal sources can be realized.

[0046] In a preferred embodiment, based on high-frequency wide-area electromagnetic data at different time points, the overall resistivity structure of the dangerous rock monitoring area at different time points is obtained, including: using electromagnetic constraint inversion method to process the high-frequency wide-area electromagnetic data at the current time point to obtain the overall resistivity structure of the dangerous rock monitoring area at the current time point. Specifically, the electromagnetic constraint inversion method introduces prior constraint conditions in the imaging process to realize high-resolution inversion and difference monitoring of the development characteristics of the dangerous rock structure surface.

[0047] The electromagnetic constraint inversion method used can be a conventional method in the art, and its specific implementation process is generally as follows:

[0048] Initial inversion and modeling: unconstrained inversion (for example, only using smooth constraints) is performed on high-frequency wide-area electromagnetic data to obtain an initial model of the formation resistivity;

[0049] Prior model: high-precision shallow velocity structure is obtained from the double-station microseismic inversion method to constrain the distribution of shallow resistivity in electromagnetic inversion or to provide lithology, depth, and in-situ resistivity information using drilling data;

[0050] Specific model constraint term construction: in the existing Tikhonov regularization framework, the weight matrix (the weight matrix setting is no longer globally uniform, but is spatially adjusted according to the reliability of the prior information) and the reference model (the reference model is the prior model constructed above) in the model constraint term are specifically set;

[0051] Perform constrained inversion: starting from the initial model, taking the prior model as the reference model, running the inversion algorithm with the specific model constraint term, iteratively solving, and finally obtaining a high-resolution overall resistivity structure of the dangerous rock monitoring area underground that can fit the electromagnetic observation data and meet various prior information such as geology, microseismic, logging, etc.

[0052] In a preferred embodiment, based on microseismic data at different time points, the overall velocity structure of the dangerous rock monitoring area underground at different time points is obtained, including: using the double-station microseismic inversion method to process the microseismic data at the current time point to obtain the overall velocity structure of the dangerous rock monitoring area underground at the current time point. Based on the efficient extraction technology of double-station microseismic dispersion curves in the double-station microseismic inversion method, Rayleigh wave dispersion curves are quickly obtained through joint analysis of double-station, improving the efficiency and accuracy of microseismic detection under complex terrain conditions.

[0053] The double-station microseismic inversion method is a widely used technology in engineering geophysics and shallow geological exploration. This technology is a microseismic Rayleigh surface wave dispersion data analysis method for irregular arrays. It uses a normalization algorithm to calculate the empirical Green function between station pairs, and uses SPAC coefficients to obtain phase velocity values, specifically solving the dispersion calculation problem of irregular array microseismic detection. The specific implementation process is generally as follows:

[0054] For each irregularly arranged station pair, long-time microseismic signals are intercepted respectively, and the empirical Green function between the station pairs is obtained through cross-correlation calculation, and the normalized spectrum processing is performed thereon;

[0055] The imaginary part of the SPAC coefficient is used as the core inversion parameter;

[0056] The theoretical relationship model between the imaginary part of the SPAC coefficient and the high-order Bessel function is established, which can more sensitively reflect the irregularity of the azimuth between the stations;

[0057] The real part and the imaginary part of the SPAC coefficient are combined together as observation data to construct a target function. By fitting the zero-order Bessel function (corresponding to the real part) and the high-order Bessel function (corresponding to the imaginary part), the more stable and accurate wave number k(f) is obtained, and then the final double-station phase velocity dispersion curve is calculated, and the overall velocity structure of the dangerous rock monitoring area is obtained.

[0058] In a preferred embodiment, as shown in Figure 3 The joint monitoring and positioning based on the electromagnetic radiation signal and the vibration signal includes the following steps:

[0059] The time of the electromagnetic radiation abnormal event and the time of the vibration abnormal event are compared, and if the time difference between the two is less than a set time threshold, it is determined that the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in time; the set time threshold can be determined according to the physical properties of rock fracture and the sampling frequency, and is usually in the order of milliseconds to seconds; the set deviation amount is set based on the spatial resolution of the monitoring area and the positioning accuracy, for example, not more than 1 / 2 of the size of the positioning grid.

[0060] For the electromagnetic radiation abnormal event and the vibration abnormal event that are synchronous in time, the grid search algorithm based on 3D ray tracing travel time is used to respectively locate the source position of the electromagnetic radiation abnormal event and the source position of the vibration abnormal event, and if the spatial deviation amount of the spatial positioning results of the two is less than or equal to the set deviation amount, it is determined that the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in time and the spatial positioning of the source position of the electromagnetic radiation abnormal event and the source position of the vibration abnormal event is consistent.

[0061] Specifically, in the grid search algorithm based on 3D ray tracing travel time, the underground overall velocity structure of the dangerous rock monitoring area obtained by micro-motion detection inversion is used as the basis, the pre-generated travel time table is used to replace real-time ray tracing, the residual error between the theoretical travel time and the observed travel time is quickly calculated, and the point with the minimum residual error in the three-dimensional grid is searched as the rock breaking position. At the same time, the intensity information of the electromagnetic radiation signal is used to assist in positioning and verify the positioning result of the grid search algorithm based on 3D ray tracing travel time, specifically, the polarization direction of the electromagnetic radiation signal is used to estimate the source direction, and the directions of multiple receiving coils arranged in the dangerous rock monitoring area are used for intersection positioning to obtain the rock breaking position. If the rock breaking positions obtained by the two positioning methods are consistent in space, the spatial deviation amount of the spatial positioning results of the two is less than or equal to the set deviation amount, and the final rock breaking position is confirmed.

[0062] In another embodiment, the positioning process adopted is as follows:

[0063] Rock breaking position positioning using electromagnetic data: the polarization direction of electromagnetic radiation signals is used to estimate the source direction, and combined with the direction of multiple receiving coils arranged in the dangerous rock monitoring area, the rock breaking position and its corresponding confidence region based on electromagnetic data positioning are obtained through intersection positioning;

[0064] Rock breaking position positioning using vibration data based on 3D ray tracing travel time grid search algorithm: based on the overall velocity structure of the dangerous rock monitoring area obtained by microseismic detection inversion, the travel time table is pre-generated to replace real-time ray tracing, the residual between the theoretical travel time and the observed travel time is quickly calculated, and the point with the minimum residual in the three-dimensional grid is searched as the rock breaking position, i.e. the rock breaking position based on vibration data positioning is obtained;

[0065] Consistency check: calculate the spatial deviation of the rock breaking position based on electromagnetic data positioning and the rock breaking position based on vibration data positioning, if the spatial deviation is less than or equal to the set deviation, the final rock breaking position is confirmed, if the spatial deviation is greater than the set deviation, convergence detection is performed;

[0066] Convergence detection: the confidence region determined by the rock breaking position positioning using electromagnetic data is used to impose structural constraints on the grid search space of the 3D ray tracing travel time grid search algorithm, and the grid search space of the 3D ray tracing travel time grid search algorithm is limited within the physically feasible space cone, and then the rock breaking position is positioned using vibration data based on the 3D ray tracing travel time grid search algorithm, to obtain the optimized rock breaking position based on vibration data positioning as the final rock breaking position. In this way, the search efficiency is improved, and non-physical solutions are avoided. At the same time, by analyzing the spatial relationship between the time delay positioning result and the confidence region, joint diagnosis of the propagation environment model and the measurement quality of the sensor (receiving coil arranged in the dangerous rock monitoring area) can be realized.

[0067] Through this closed-loop collaborative processing architecture, the advantages of heterogeneous positioning resources are complementary, and the positioning reliability and accuracy of the system in complex scenes such as non-line-of-sight and multipath effect are significantly improved.

[0068] In a preferred embodiment, the dangerous rock monitoring method based on wide-area electric seismic amplitude-frequency further includes a multi-source data fusion and early warning step, which fuses the resistivity differential anomaly, the velocity structure differential anomaly, and the spatial position of the confirmed rock breaking event, the occurrence frequency, judges whether the change degree of the dangerous rock body in the dangerous rock monitoring area reaches the early warning critical value, and outputs the early warning decision.

[0069] Another embodiment provides a dangerous rock monitoring device based on wide-area electric shock amplitude frequency, comprising:

[0070] The first module is configured to acquire high-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals synchronously acquired during high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring of the dangerous rock monitoring area;

[0071] The second module is configured to acquire the underground overall resistivity structure of the dangerous rock monitoring area at different time points based on the high-frequency wide-area electromagnetic data at the different time points, calculate the current resistivity differential information according to the time difference principle, and when the current resistivity differential information exceeds a first early warning threshold, it is considered that the current resistivity differential is abnormal, and it is considered that an electromagnetic radiation abnormal event occurs, and the current collected electromagnetic radiation signal is the electromagnetic radiation signal generated by the suspected rock breakage.

[0072] The third module is configured to acquire the underground overall velocity structure of the dangerous rock monitoring area at different time points based on the micro-motion data at the different time points, calculate the current velocity structure differential information according to the time difference principle, and when the current velocity structure differential information exceeds a second early warning threshold, it is considered that the current velocity structure differential is abnormal, and it is considered that a vibration abnormal event occurs, and the current collected vibration signal is the vibration signal generated by the suspected rock breakage.

[0073] The fourth module is configured to perform joint monitoring and positioning based on the electromagnetic radiation signals and the vibration signals, and when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and the spatial positioning of the source positions of the electromagnetic radiation abnormal event and the vibration abnormal event is consistent, it is considered that the event is a rock breakage event.

[0074] In another aspect, the present application provides a computer device comprising a memory and a processor, the memory stores a computer program, and the processor implements the steps of the dangerous rock monitoring method based on wide-area electric shock amplitude frequency provided in any of the above embodiments when executing the computer program. The computer device can be a server. The computer device comprises a processor, a memory, a network interface and a database connected by a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store sample data. The network interface of the computer device is configured to communicate with external terminals through network connection.

[0075] In another aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the wide-area electric seismic amplitude-frequency-based dangerous rock monitoring method provided in any of the above embodiments.

[0076] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware, and the computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the processes of the above-mentioned embodiments can be included. Any reference to memory, storage, database or other medium used in the embodiments provided in the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM) and the like.

[0077] The details of the present application are as follows.

[0078] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present application.

[0079] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application.

[0080] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A dangerous rock monitoring method based on wide-area electric shock amplitude-frequency, characterized in that, The method comprises the following steps: High-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals synchronously collected during high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring of the dangerous rock monitoring area are acquired; Based on the high-frequency wide-area electromagnetic data at different time points, the underground overall resistivity structure of the dangerous rock monitoring area at different time points is acquired, the current resistivity differential information is calculated according to the time difference principle, and when the current resistivity differential information exceeds the first early warning critical value, the current resistivity differential is abnormal, it is considered that an electromagnetic radiation abnormal event occurs, and the currently collected electromagnetic radiation signal is the electromagnetic radiation signal generated by the suspected rock breakage; Based on the micro-motion data at different time points, the underground overall velocity structure of the dangerous rock monitoring area at different time points is acquired, the current velocity structure differential information is calculated according to the time difference principle, and when the current velocity structure differential information exceeds the second early warning critical value, the current velocity structure differential is abnormal, it is considered that a vibration abnormal event occurs, and the vibration signal generated by the suspected rock breakage is confirmed based on the currently collected vibration signal; The electromagnetic radiation signal and the vibration signal are jointly monitored and positioned, and when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and the spatial positioning of the electromagnetic radiation abnormal event source position and the vibration abnormal event source position is consistent, it is confirmed that the event is a rock breakage event.

2. The monitoring method of the dangerous rock based on the amplitude-frequency of the wide-area electric earthquake according to claim 1, characterized in that, The high-frequency wide-area electromagnetic method transmission coil and the receiving coil arranged in the dangerous rock monitoring area, and the seismic signal monitoring station are used to realize high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring of the dangerous rock monitoring area, wherein the high-frequency wide-area electromagnetic method detection and the electromagnetic radiation monitoring share the receiving coil arranged in the dangerous rock monitoring area.

3. The method according to claim 1, wherein, Based on the high-frequency wide-area electromagnetic data at different time points, the underground overall resistivity structure of the dangerous rock monitoring area at different time points is acquired, including: the high-frequency wide-area electromagnetic data at the current time point is processed by using an electromagnetic constraint inversion method to acquire the underground overall resistivity structure of the dangerous rock monitoring area at the current time point.

4. The method according to claim 1, wherein, Based on the micro-motion data at different time points, the underground overall velocity structure of the dangerous rock monitoring area at different time points is acquired, including: the micro-motion data at the current time point is processed by using a double-station micro-motion inversion method to obtain the underground overall velocity structure of the dangerous rock monitoring area at the current time point.

5. The monitoring method of the dangerous rock based on the amplitude-frequency of the wide-area electric earthquake according to any one of claims 1 to 4, characterized in that, The electromagnetic radiation signal and the vibration signal are jointly monitored and positioned, including the following steps: The time when the electromagnetic radiation abnormal event occurs is compared with the time when the vibration abnormal event occurs, and if the time difference between the two events is less than a set time threshold, it is determined that the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time; For the electromagnetic radiation anomaly event and the vibration anomaly event which are synchronous in time, the grid search algorithm based on 3D ray tracing travel time is used to locate the source position of the electromagnetic radiation anomaly event and the source position of the vibration anomaly event respectively, and if the spatial deviation of the spatial positioning results of the two is less than or equal to the set deviation, it is determined that the electromagnetic radiation anomaly event and the vibration anomaly event are synchronous in time and the spatial positioning of the source position of the electromagnetic radiation anomaly event and the source position of the vibration anomaly event is consistent.

6. The method according to claim 5, wherein, When the source position of the electromagnetic radiation anomaly event is spatially positioned, the source direction is estimated by using the polarization direction of the electromagnetic radiation signal, and the direction of the multiple receiving coils arranged in the dangerous rock monitoring area is used for intersection positioning to assist in verifying the positioning result of the grid search algorithm based on 3D ray tracing travel time.

7. The wide-range electric seismic amplitude-frequency-based dangerous rock monitoring method according to claim 1 or 2 or 3 or 4 or 6, characterized in that, Further comprising a multi-source data fusion and early warning step, fusing the resistivity difference anomaly, the velocity structure difference anomaly, and the spatial position and frequency of the confirmed rock breaking event, judging whether the change degree of the dangerous rock body in the dangerous rock monitoring area reaches the early warning critical value, and outputting the early warning decision.

8. The dangerous rock monitoring device based on wide-area electric shock amplitude-frequency, characterized in that, Comprise: The first module is used for acquiring high-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals which are synchronously collected when the dangerous rock monitoring area is detected by high-frequency wide-area electromagnetic method, monitored by electromagnetic radiation, micro-motion detected and vibration signal monitored; The second module is used for acquiring the underground overall resistivity structure of the dangerous rock monitoring area at different time points based on the high-frequency wide-area electromagnetic data at different time points, calculating the current resistivity difference information according to the time difference principle, and considering that the current resistivity difference anomaly occurs when the current resistivity difference information exceeds the first early warning critical value, and considering that the current collected electromagnetic radiation signal is the electromagnetic radiation signal generated by the suspected rock breaking; The third module is used for acquiring the underground overall velocity structure of the dangerous rock monitoring area at different time points based on the micro-motion data at different time points, calculating the current velocity structure difference information according to the time difference principle, and considering that the current velocity structure difference anomaly occurs when the current velocity structure difference information exceeds the second early warning critical value, and confirming the vibration signal generated by the suspected rock breaking based on the current collected vibration signal; The fourth module is used for joint monitoring and positioning based on the electromagnetic radiation signal and the vibration signal, and when the electromagnetic radiation anomaly event and the vibration anomaly event are synchronous in time and the spatial positioning of the source position of the electromagnetic radiation anomaly event and the source position of the vibration anomaly event is consistent, it is confirmed that it is a rock breaking event.

9. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to realize the steps of the wide-area electric shock amplitude frequency-based dangerous rock monitoring method of claim 1 or 2 or 3 or 4 or 6.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the wide-area electric shock amplitude frequency-based dangerous rock monitoring method of claim 1 or 2 or 3 or 4 or 6.

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