Dangerous rock monitoring method, device and equipment based on wide-area electric shock amplitude frequency and medium

Abstract

The invention 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, and the method comprises the following steps: carrying out high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring on a dangerous rock monitoring area; based on the high-frequency wide-area electromagnetic data at different time points, whether resistivity difference abnormity exists or not and whether an electromagnetic radiation abnormal event occurs or not are determined; based on the micro-motion data at different time points, whether speed structure difference abnormity exists or not and whether a vibration abnormal event occurs or not are determined; and when the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in occurrence time and consistent in spatial positioning, determining that the event is a rock crushing event. Through multiple detection means, broadband range real-time monitoring of electromagnetic signals and vibration signals is realized, abnormal signals generated by internal changes of rocks can be detected and identified to the maximum extent, the dangerous rock disaster-pregnancy process is effectively monitored, ground disaster missing report is reduced, and the early warning success rate 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 harm, 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 the disaster gestation process of a dangerous rock structural plane, 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 structural plane, tracking of a deterioration process and real-time monitoring of development characteristics.

[0008] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: On the one hand, the application provides a dangerous rock monitoring method based on wide-area electric shock amplitude-frequency, comprising the following steps: obtaining 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 a dangerous rock monitoring area; 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, when the current resistivity difference information exceeds the first warning threshold, the current resistivity difference 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; 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, when the current velocity structure difference information exceeds the second warning threshold, the current velocity structure difference 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; Based on the electromagnetic radiation signal and the vibration signal, joint monitoring and positioning are carried out, 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 confirmed that it is a rock breaking event.

[0009] On the other hand, the application provides a dangerous rock monitoring device based on wide-area electric shock amplitude frequency, comprising: 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 synchronously collected 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; 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 difference information according to the time difference principle, when the current resistivity difference information exceeds the first warning threshold, the current resistivity difference 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; 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 difference information according to the time difference principle, when the current velocity structure difference information exceeds the second warning threshold, the current velocity structure difference 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; The fourth module is used for joint monitoring and positioning based on the electromagnetic radiation signal and the vibration signal, 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 confirmed that it is a rock breaking event.

[0010] 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 above-mentioned wide-area electric seismic amplitude-frequency-based dangerous rock monitoring method when executing the computer program.

[0011] In another aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, the computer program implementing the steps of the above-mentioned wide-area electric seismic amplitude-frequency-based dangerous rock monitoring method when executed by a processor.

[0012] 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 above-mentioned wide-area electric seismic amplitude-frequency-based dangerous rock monitoring method.

[0013] Compared with the prior art, the present application has the following advantages: The wide-area electric seismic amplitude-frequency-based dangerous rock monitoring method 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 dangerous rock structure surface, tracking of property 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 dangerous rock monitoring area; based on the high-frequency wide-area electromagnetic data at different time points, it confirms whether there is a resistivity difference anomaly at present, and judges whether an electromagnetic radiation anomaly event occurs; based on the microseismic data at different time points, it confirms whether there is a velocity structure difference anomaly at present, and judges whether a vibration anomaly event occurs; when the electromagnetic radiation anomaly event and the vibration anomaly event are synchronous in time and consistent in spatial positioning, it is confirmed that it is a rock breaking event. Through the mutual intersection of the four detection means, the wideband range real-time monitoring of electromagnetic signals and vibration signals can be realized, the abnormal signals generated by the internal changes of rocks can be maximally detected and identified, the dangerous rock disaster gestation process can be effectively monitored, the missed reports of geological disasters can be reduced, and the success rate of early warning can be improved.

[0014] Specifically, the wide-area electric seismic amplitude-frequency-based dangerous rock monitoring method provided by the present application can reflect the resistivity and velocity structure changes of the long-term and gradual deterioration process of the rock mass, and in combination with the vibration and electromagnetic radiation signals reflecting the instantaneous and sudden breaking events, the 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.

[0015] By introducing the time difference principle to dynamically track the underground resistivity structure and velocity structure, the rock mass physical property deterioration trend caused by the occurrence and development of cracks can be identified before the rock breaks (vibration and electromagnetic radiation). Compared with the monitoring method which only relies on the rock breaking event signal, the early warning information based on the change of the physical properties of the rock mass provides more advanced early warning information.

[0016] The present application can determine the occurrence of abnormal events, and accurately give the spatial coordinate position of the abnormal event occurrence position through the positioning algorithm. The present application requires that the electromagnetic radiation abnormal event and the vibration abnormal event are synchronous in time and homologous in space, and only then is it confirmed as an effective rock breaking event. This strict joint determination mechanism can effectively distinguish the true signal generated by rock breaking from non-disaster signals such as environmental noise, interference, etc., thereby significantly improving the confidence of disaster identification. BRIEF DESCRIPTION OF DRAWINGS

[0017] 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 other drawings can also be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0018] Figure 1 The flowchart of the dangerous rock monitoring method based on wide-area electric shock amplitude frequency provided by an embodiment; Figure 2 The layout diagram of the sensor in an embodiment; Figure 3 The rock breaking event monitoring and positioning flowchart in an embodiment. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Reference Figure 1 In an embodiment, a dangerous rock monitoring method based on wide-area electric shock amplitude frequency is proposed, comprising the following steps: Obtaining 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; Based on 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, when the current resistivity difference information exceeds the first warning critical value, the current resistivity difference is abnormal, and it is considered that the electromagnetic radiation anomaly event occurs, and the current collected electromagnetic radiation signal is the electromagnetic radiation signal generated by the suspected rock breaking; 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, when the current velocity structure difference information exceeds the second warning critical value, the current velocity structure difference is abnormal, and it is considered that the vibration anomaly event occurs, and the vibration signal generated by the suspected rock breaking is confirmed based on the current collected vibration signal; The electromagnetic radiation signal and the vibration signal are jointly monitored and positioned, when the electromagnetic radiation anomaly event and the vibration anomaly event are synchronous in time and the spatial positioning of the electromagnetic radiation anomaly event source position and the vibration anomaly event source position is consistent, it is confirmed that it is a rock breaking event.

[0021] The present application can realize high-precision rapid imaging, time-lapse monitoring, abnormal source dynamic capture and spatial positioning of the dangerous rock structure surface, thereby improving the all-round monitoring and early warning ability of the dangerous rock disaster gestating evolution process, reducing the false alarm and improving the success rate of early warning.

[0022] The present application comprehensively uses high-frequency wide-area electromagnetic and micro-motion detection technology, electromagnetic radiation signal and vibration signal monitoring technology generated in the rock damage and destruction process, realizes real-time tracking of the physical property distribution and deterioration process of the internal structure surface of the dangerous rock, realizes the breakthrough from "apparent monitoring" to "internal monitoring", and improves the physical authenticity of early warning.

[0023] The present application can not only realize high-precision rapid imaging of the dangerous rock structure surface by high-frequency wide-area electromagnetic detection and micro-motion detection, but also dynamically track the evolution process of the structure surface deterioration by using the time difference principle, and can also integrate electromagnetic radiation signals and vibration signals in the deterioration expansion process to realize instantaneous dynamic capture and spatial accurate positioning of the abnormal source. At the same time, it is required that the electromagnetic radiation anomaly event and the vibration anomaly event are synchronous in time and spatially homologous, and only then the effective rock breaking event is confirmed, the environmental noise interference is effectively inhibited, the false alarm rate is significantly reduced, and the reliability of early warning is improved.

[0024] In an embodiment, refer to Figure 2The high-frequency wide-area electromagnetic method transmission coil, the wide-area electric shock amplitude-frequency monitor, the vibration sensor and the electromagnetic receiving coil are arranged in the dangerous rock monitoring area, and high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring are realized.

[0025] In an embodiment, the high-frequency wide-area electromagnetic method transmission coil and the receiving coil and the seismic signal monitoring station are arranged in the dangerous rock monitoring area, and high-frequency wide-area electromagnetic method detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring are realized.

[0026] The resistivity information of the dangerous rock monitoring area is detected by the high-frequency wide-area electromagnetic method, and the 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 dangerous rock topography of the high gorge and steep valley landform, the arrangement condition, the power supply stability and the continuity, the non-grounded wide-area electromagnetic detection and the time difference monitoring technology are used. The resistivity information of the dangerous rock monitoring area is detected by the non-grounded wide-area electromagnetic detection method, and the overall resistivity structure of the dangerous rock monitoring area is obtained, that is, the resistivity distribution map of the overall underground of the dangerous rock monitoring area. The time difference monitoring mainly uses the 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 warning critical value, the current resistivity difference is abnormal.

[0027] In the dangerous rock monitoring area, the seismic signal detection station is arranged for micro-motion detection and vibration signal monitoring. The velocity structure of the overall underground of the dangerous rock monitoring area is detected by using the multi-point dispersion curve extraction and imaging technology, and the underground abnormal body elastic deformation of the dangerous rock monitoring area is monitored according to the detection difference in the time dimension. Specifically, the micro-motion array is arranged in the dangerous rock monitoring area, the Rayleigh wave dispersion curve is extracted by using the micro-motion signals collected by the micro-motion array through the space autocorrelation method (SPAC) and the frequency wave number method (FK), and the overall velocity structure of the underground of the dangerous rock monitoring area is obtained by inversion calculation. The micro-motion detection and the non-grounded wide-area electromagnetic detection can be combined to obtain the overall geological structure of the underground of the dangerous rock monitoring area. The micro-motion monitoring principle is similar to that of the non-grounded high-frequency wide-area electromagnetic method, and the difference between the detection results at different times is mainly used to identify the underground abnormal body property change process. Based on the micro-motion data at different time points, the overall velocity structure of the underground 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 the current velocity structure difference is abnormal when the current velocity structure difference information exceeds the second warning critical value.

[0028] The micro-displacement station is used to collect the transient elastic waves, i.e. acoustic emission signals, generated in the process of rock damage and destruction. 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. In addition, the vibration signals generated in the process of rock damage and destruction will be accompanied by the generation of electromagnetic radiation. The amplitude-frequency characteristics of the electromagnetic radiation signals generated by different reasons of rock destruction are different, and the electromagnetic radiation signals generated by different internal causes can be identified by data analysis through electromagnetic receivers.

[0029] In the process of dangerous rock damage and destruction, the transient elastic waves, i.e. acoustic emission signals, generated in the process of rock damage and destruction and the accompanying electromagnetic radiation signals are collected. Through the 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 the spatial dynamic positioning of abnormal sources can be realized.

[0030] In a preferred embodiment, 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, including: using an electromagnetic constrained inversion method to process the high-frequency wide-area electromagnetic data at the current time point to obtain the underground overall resistivity structure of the dangerous rock monitoring area at the current time point. Specifically, the electromagnetic constrained inversion method introduces prior constraints in the imaging process to realize high-resolution inversion and differential monitoring of the development characteristics of the dangerous rock structure surface.

[0031] The electromagnetic constrained inversion method used can be a conventional method in the art, and its specific implementation process is generally as follows: Initial inversion and modeling: unconstrained inversion (for example, only using smooth constraints) is performed on the high-frequency wide-area electromagnetic data to obtain an initial model of the formation resistivity; Prior model: high-precision shallow velocity structure is obtained from the double-station micro-displacement inversion method to constrain the distribution of shallow resistivity in electromagnetic inversion or to use the lithology, depth and in-situ resistivity information provided by the drilling data; Specifically, the weight matrix (the weight matrix is no longer globally uniform, but is adjusted in space 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 set in the existing Tikhonov regularization framework; Perform constrained inversion: starting from the initial model and taking the prior model as the reference model, run the inversion algorithm with the targeted model constraint term, iteratively solve, and finally obtain a high-resolution underground overall resistivity structure of the dangerous rock monitoring area that can fit the electromagnetic observation data and meet the geological, micro-displacement, logging and other prior information.

[0032] In a preferred embodiment, based on the microtremor 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 microtremor inversion method to process the microtremor 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 microtremor dispersion curves in the double-station microtremor inversion method, Rayleigh wave dispersion curves are quickly obtained through joint analysis of double stations, improving the detection efficiency and accuracy of microtremor under complex terrain conditions.

[0033] The double-station microtremor inversion method is a widely used technology in engineering geophysics and shallow geological exploration. This method is a microtremor 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 microtremor detection. The specific implementation process is generally as follows: For each irregularly arranged station pair, long-term microtremor signals are intercepted respectively, and the empirical Green function between the station pairs is obtained by cross-correlation calculation, and the normalized spectrum processing is performed thereon; The imaginary part of the SPAC coefficient is used as the core inversion parameter; A 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 station pairs; 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), a more stable and accurate wave number k(f) is obtained, and the final double-station phase velocity dispersion curve is calculated, and then the overall velocity structure of the dangerous rock monitoring area underground is obtained.

[0034] In a preferred embodiment, as shown in Figure 3 joint monitoring and positioning based on electromagnetic radiation signals and vibration signals, including the following steps: Compare the time when the electromagnetic radiation anomaly event occurs with the time when the vibration anomaly event occurs. If the time difference between the two is less than a set time threshold, it is determined that the electromagnetic radiation anomaly event and the vibration anomaly 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 and positioning accuracy of the monitoring area, for example, not more than 1 / 2 of the size of the positioning grid.

[0035] 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.

[0036] 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 microseismic detection inversion is used as the basis, the travel time table is pre-generated to replace real-time ray tracing, the residual of 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. At the same time, the intensity information of the electromagnetic radiation signal is used to verify the positioning result of the grid search algorithm based on 3D ray tracing travel time, specifically, the source direction is estimated by using the polarization direction of the electromagnetic radiation signal, and the rock breaking position is obtained by using the direction of multiple receiving coils arranged in the dangerous rock monitoring area for intersection positioning. If the rock breaking positions obtained by the two positioning methods are consistent in space, the spatial deviation of the spatial positioning results of the two is less than or equal to the set deviation, and the final rock breaking position is confirmed.

[0037] In another embodiment, the positioning process adopted is as follows: Rock breaking position positioning using electromagnetic data: the source direction is estimated by using the polarization direction of the electromagnetic radiation signal, and the rock breaking position and its corresponding confidence region positioned based on electromagnetic data are obtained by using the direction of multiple receiving coils arranged in the dangerous rock monitoring area for intersection positioning; Rock breaking position positioning using vibration data based on 3D ray tracing travel time grid search algorithm: the underground overall velocity structure of the dangerous rock monitoring area obtained by microseismic detection inversion is used as the basis, the travel time table is pre-generated to replace real-time ray tracing, the residual of the theoretical travel time and the observed travel time is quickly calculated, and the rock breaking position is searched as the rock breaking position in the three-dimensional grid, that is, the rock breaking position positioned based on vibration data is obtained; Consistency verification: the spatial deviation of the two spatial positioning results of the rock breaking position positioned based on electromagnetic data and the rock breaking position positioned based on vibration data is calculated, if the spatial deviation is less than or equal to the set deviation, the final rock breaking position is confirmed, and if the spatial deviation is greater than the set deviation, convergence detection is performed; Convergence detection: The confidence region of rock breaking position positioning determined by electromagnetic data imposes structural constraints on the grid search space of the 3D ray tracing travel time-based grid search algorithm, limits the grid search space of the 3D ray tracing travel time-based grid search algorithm to a physically feasible space cone, and then uses the 3D ray tracing travel time-based grid search algorithm to locate the rock breaking position based on vibration data 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, the joint diagnosis of the propagation environment model and the measurement quality of the sensor (the receiving coil arranged in the dangerous rock monitoring area) can be realized.

[0038] Through this closed-loop cooperative 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.

[0039] In a preferred embodiment, the dangerous rock monitoring method based on wide-area electric seismic amplitude frequency further comprises a multi-source data fusion and early warning step, which fuses the resistivity difference anomaly, the velocity structure difference anomaly, and the spatial position and occurrence frequency of the confirmed rock breaking event, 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.

[0040] In another embodiment, a dangerous rock monitoring device based on wide-area electric seismic amplitude frequency is provided, comprising: The first module is configured to acquire 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 the dangerous rock monitoring area; 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 different time points, calculate the current resistivity difference information according to the time difference principle, and when the current resistivity difference information exceeds the first early warning critical value, the current resistivity difference anomaly is considered to occur, and the current collected electromagnetic radiation signal is considered to be the electromagnetic radiation signal generated by the suspected rock breaking; 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 different time points, calculate the current velocity structure difference information according to the time difference principle, and when the current velocity structure difference information exceeds the second early warning critical value, the current velocity structure difference anomaly is considered to occur, and the current collected vibration signal is considered to be the vibration signal generated by the suspected rock breaking; 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 time and the spatial locations of the electromagnetic radiation abnormal event source and the vibration abnormal event source are consistent, the rock breaking event is confirmed.

[0041] In another aspect, the present application provides a computer 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 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 operating system and the computer program in the non-volatile storage medium to run. The database of the computer device is configured to store sample data. The network interface of the computer device is configured to communicate with an external terminal through a network connection.

[0042] In another aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and the computer program is executed by a processor to implement the steps of the rockfall monitoring method based on wide-area electric shock amplitude-frequency provided in any of the above embodiments.

[0043] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods 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), etc.

[0044] The details of the present application are as follows.

[0045] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0046] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application.

[0047] 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 changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for monitoring dangerous rocks based on wide-area electromagnetic amplitude and frequency, characterized in that, Includes the following steps: When conducting high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection, and vibration signal monitoring in the monitoring area of ​​dangerous rocks, the high-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data, and vibration signals are collected simultaneously. Based on high-frequency wide-area electromagnetic data at different time points, the overall underground 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. When the current resistivity difference information exceeds the first warning threshold, the current resistivity difference is abnormal, and an electromagnetic radiation abnormal event is considered to have occurred. The electromagnetic radiation signal currently collected is the electromagnetic radiation signal suspected to be generated by rock fracturing. Based on micro-motion data at different time points, the overall underground velocity structure of the monitoring area of ​​dangerous rock is obtained at different time points. 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 threshold, the current velocity structure difference is abnormal, and it is considered that an abnormal vibration event has occurred. Based on the currently collected vibration signal, the vibration signal suspected to be generated by rock breakage is confirmed. Based on the joint monitoring and location of electromagnetic radiation signals and vibration signals, when the electromagnetic radiation anomaly and the vibration anomaly occur synchronously in time and the spatial location of the electromagnetic radiation anomaly source and the vibration anomaly source is consistent, it is confirmed as a rock fracturing event.

2. The method for monitoring dangerous rocks based on wide-area electroseismic amplitude and frequency according to claim 1, characterized in that, By deploying high-frequency wide-area electromagnetic transmitting and receiving coils and seismic signal monitoring stations in the dangerous rock monitoring area, high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring can be carried out in the dangerous rock monitoring area. The high-frequency wide-area electromagnetic detection and electromagnetic radiation monitoring share the receiving coil deployed in the dangerous rock monitoring area.

3. The method for monitoring dangerous rocks based on wide-area electroseismic amplitude and frequency according to claim 1, characterized in that, Based on high-frequency wide-area electromagnetic data at different time points, the overall underground resistivity structure of the dangerous rock monitoring area at different time points is obtained, including: using the electromagnetic constraint inversion method to process the high-frequency wide-area electromagnetic data at the current time point to obtain the overall underground resistivity structure of the dangerous rock monitoring area at the current time point.

4. The method for monitoring dangerous rocks based on wide-area electroseismic amplitude and frequency according to claim 1, characterized in that, Based on micro-motion data at different time points, the overall underground velocity structure of the dangerous rock monitoring area at different time points is obtained, including: using the dual-station micro-motion inversion method to process the micro-motion data at the current time point to obtain the overall underground velocity structure of the dangerous rock monitoring area at the current time point.

5. The method for monitoring dangerous rocks based on wide-area electroseismic amplitude and frequency according to any one of claims 1 to 4, characterized in that, Joint monitoring and location based on electromagnetic radiation signals and vibration signals includes the following steps: The time when the electromagnetic radiation abnormal event occurs is compared with the time when the vibration abnormal event occurs. 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 terms of occurrence time. For electromagnetic radiation anomalies and vibration anomalies that occur synchronously in time, a grid search algorithm based on 3D ray tracing time travel is used to spatially locate the source locations of the electromagnetic radiation anomaly and vibration anomalies, respectively. If the spatial deviation between the two spatial location results is less than or equal to a set deviation, it is determined that the electromagnetic radiation anomaly and vibration anomaly occur synchronously in time and that the spatial locations of the source locations of the electromagnetic radiation anomaly and vibration anomalies are consistent.

6. The method for monitoring dangerous rocks based on wide-area electroseismic amplitude and frequency according to claim 5, characterized in that, When spatially locating the source of an electromagnetic radiation anomaly, the method also includes: estimating the source direction using the polarization direction of the electromagnetic radiation signal, and performing intersection positioning by combining the directions of multiple receiving coils deployed in the dangerous rock monitoring area, in order to assist in verifying the positioning results based on the grid search algorithm for 3D ray tracing travel time.

7. The method for monitoring dangerous rocks based on wide-area electroseismic amplitude and frequency according to claim 1, 2, 3, 4, or 6, characterized in that, It also includes a multi-source data fusion and early warning step, which integrates the resistivity difference anomaly, velocity structure difference anomaly, and the confirmed spatial location and frequency of rock fracturing events to determine whether the degree of change of the dangerous rock mass in the dangerous rock monitoring area has reached the early warning threshold, and outputs an early warning decision.

8. A rockfall monitoring device based on wide-area electromagnetic amplitude and frequency, characterized in that, include: The first module is used to acquire high-frequency wide-area electromagnetic data, electromagnetic radiation signals, micro-motion data and vibration signals simultaneously collected when conducting high-frequency wide-area electromagnetic detection, electromagnetic radiation monitoring, micro-motion detection and vibration signal monitoring in the monitoring area of ​​dangerous rocks. The second module is used to obtain the overall underground resistivity structure of the dangerous rock monitoring area at different time points based on high-frequency wide-area electromagnetic data at different time points. It calculates the current resistivity difference information according to the time difference principle. When the current resistivity difference information exceeds the first warning threshold, the current resistivity difference is abnormal, and it is considered that an electromagnetic radiation abnormal event has occurred. The electromagnetic radiation signal currently collected is the electromagnetic radiation signal suspected to be generated by rock fracturing. The third module is used to obtain the overall underground velocity structure of the dangerous rock monitoring area at different time points based on micro-motion data at different time points, calculate the current velocity structure difference information according to the time difference principle, and when the current velocity structure difference information exceeds the second warning threshold, the current velocity structure difference is abnormal, and it is considered that an abnormal vibration event has occurred. Based on the currently collected vibration signal, the vibration signal suspected to be generated by rock breakage is confirmed. The fourth module is used for joint monitoring and location based on electromagnetic radiation signals and vibration signals. When electromagnetic radiation anomalies and vibration anomalies occur synchronously and the spatial locations of the electromagnetic radiation anomaly source and the vibration anomaly source are consistent, it is confirmed as a rock breaking event.

9. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes a computer program, it implements the steps of the dangerous rock monitoring method based on wide-area electroseismic amplitude and frequency as described in claim 1, 2, 3, 4, or 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the rockfall monitoring method based on wide-area electroseismic amplitude and frequency as described in claim 1, 2, 3, 4, or 6.

Images