IES87445Y1 - A detection method for mining subsidence area based on the Mask R-CNN model - Google Patents

A detection method for mining subsidence area based on the Mask R-CNN model Download PDF

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IES87445Y1
IES87445Y1 IE20230126U IE20230126U IES87445Y1 IE S87445 Y1 IES87445 Y1 IE S87445Y1 IE 20230126 U IE20230126 U IE 20230126U IE 20230126 U IE20230126 U IE 20230126U IE S87445 Y1 IES87445 Y1 IE S87445Y1
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mining
dataset
model
mining subsidence
mask
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IE20230126U
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IE20230126U1 (en
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Zhenhong Li
Kelu He
Xuesong Zhang
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Changan Univ
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/89Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/885Radar or analogous systems specially adapted for specific applications for ground probing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88Radar or analogous systems specially adapted for specific applications
    • G01S13/89Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G01S13/9021SAR image post-processing techniques
    • G01S13/9023SAR image post-processing techniques combined with interferometric techniques
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06NCOMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N3/00Computing arrangements based on biological models
    • G06N3/02Neural networks
    • G06N3/08Learning methods

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  • Engineering & Computer Science (AREA)
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Abstract

The invention provides a detection method for mining subsidence area based on the Mask R-CNN model. First, obtaining original SAR images, which are then co-registered to the common master image, and the InSAR wrapped interferograms are obtained. Based on the wrapped interferograms, which are sliced to generate colorful images. After marking the surface subsidence features of mining area on the sliced colorful interferograms to make a dataset, Gaussian surface function combined with GACOS is used to simulate the wrapped interferograms to expand the dataset. Based on the Mask R-CNN model, the dataset is input to train to obtain a mining subsidence area detection model, which is used to detect the mining subsidence area and obtain their location and boundary. After obtaining the historical and latest mining subsidence areas, determining the state of evolution and evaluating the level of surface activity (the activity duration and frequency of each mining subsidence area). The method of the invention is easy to be operated with better effect and saves time and storage space. It is applicable to a wide range without restriction of platform.

Description

Specification A detection method for mining subsidence area based on the Mask R-CNN model Technical field The invention relates to the technical field of mine monitoring, in particular to a detection method for mining subsidence area based on the Mask R-CNN model.
Background technology Synthetic Aperture Radar Interferometry (InSAR) is an advanced tool for measuring the ground and enjoys the characteristics of all-day and all-weather working ability, wide space coverage, high spatial resolution, high measurement accuracy and no need for ground instruments, therefore;,1t has been a powerful technology for measuring the surface deformation.
In prior art, there are two mining subsidence.area detection methods: (i) setting the threshold of the deformation rate, and (ii).using machine learning (ML) algorithm.
The first method is mainly to study the average deformation rate obtained by InSAR stacking or time series algorithm, although it is easy to be obtained, detection is not possible for areas with small mining subsidence scales. The second method is one of more algorithms~based on the machine learning to detect the mining subsidence area using SAR interferogram, but this method is still in the early stage with immature technology means.
Summary of the invention A detection method for mining subsidence area based on the Mask R-CNN model is needed to be provided in view of the technology problem above.
The invention provides a detection method for mining subsidence area based on the Mask R-CNN model, comprising: obtaining original SAR images, and the orbital data and topographic data corresponding to the original SAR images; in combination with the orbital data and topographic data, two adjacent SAR images are used to obtain a InSAR wrapped interferogram: Specification a sliced colorful interferogram based on the wrapped interferogram is marked with the surface subsidence features of mining area to make a dataset that contains an original image, a masked information and a masked image; based on the Mask R-CNN model, the optimal mining subsidence area detection model is obtained through dataset training and taking the machine learning evaluation index as the model training result evaluation index; inputting the wrapped interferograms into the mining surface subsidence area detection model to obtain the location and boundary of the mining subsidence area.
Additionally, the determination of the wrapped interferograms comprises the following steps: obtaining an original interferogram through interfering the adjacent SAR images; removing the plain and terrain phase by DEM; removing the effect of orbital error by a precise orbital data; operating the interferograms in multi-view to suppress noises; generating the interferograms into colorful pictures.
Additionally, the determination of the dataset comprises the following steps: using Gaussian surface function to model the surface deformation caused by mining, and obtaining the mining subsidence area with different settlements, boundary and forms by adjusting the parameters; simulating the atmosphere phase through differentiating the atmospheric delay map obtained by GACOS; simulating the noise phase through continuous uniform distribution function; obtaining the dataset of simulated interferogram data after summing and wrapping the surface deformation, atmosphere error and random noise.
Additionally, the determination of the mining surface subsidence area detection model comprises the following steps: dividing the real dataset into a training dataset and a validation dataset according to 4:1 to perform training on the Mask R-CNN basic model; adding an iteration training model and taking comprehensive indexes of precision, recall, accuracy and Fl-score as the model accuracy evaluation index; Specification When the comprehensive accuracy reaches the highest, the mining subsidence area detection model using real dataset is obtained; performing the Mask R-CNN basic model by using the real and simulated mixed dataset to obtain the mining subsidence detection model using mixed dataset; comparing the accuracy evaluation indexes of mining subsidence detection models using real dataset and mixed dataset to determine the final mining subsidence detection model.
Additionally, the obtained location and boundary of the mining subsidence area, comprising: performing the same operation as operating the historical interferograms, generating the wrapped interferogram together with the latest SAR image in the historical SAR dataset; Inputting the obtained wrapped interferogram to the mining surface subsidence area detection model to recognize the latest mining subsidence area.
Additionally, after obtaining the historical and the latest mining subsidence areas to determine the evolution state thereof and evaluate the level of surface activity; wherein, the indexes of the level of surface activity comprises: the subsidence duration and frequency of each mining subsidence area.
Obtaining the subsidence duration of the mining subsidence area through multiplying the subsidence frequency by the time interval between SAR image acquisition.
The invention provides a detection method for mining subsidence area based on the Mask R-CNN model, the beneficial effects thereof are as follows compared with the prior art: based on the Mask R-CNN model, the original wrapped interferogram generated from two adjacent SAR images is used as the dataset of the detection model, a method to generate the simulated dataset of the mining area is provided, which is helpful to improve the precision of the model; based on the Mask R-CNN model, the mining subsidence detection model is molded, which can detect the mining subsidence area effectively from the wrapped interferogram, saving the calculation time and reducing Specification the additional uncertainty caused by the phase unwrapping and time series inversion.
The detection model is easy to be operated with better effect and is resource efficient.
The detection method is a new method for wide area mining subsidence detection, which has a wide range of application and does not restrict the use of platform. The rapid detection and long-term monitoring to the mining subsidence area are important in monitoring the mining activities, which is crucial to the economic development and personal and property safety. The method can be used to guide the underground mining work to boost the monitoring for mining activities and discover the illegal mining in time.
Description of attached drawings Figure | is a framework diagram of mining subsidence area detection technology of a detection method for mining subsidence area based on the Mask R-CNN model provided in an example; figure 2 is a flow diagram of generating simulated dataset of a detection method for mining subsidence area based on the Mask R-CNN model provided in an example; figure 3 is a diagram of surface activity based on the wide-area mining subsidence detection results of a. detection method for mining subsidence area based on the Mask R-CNN model provided in an example.
Specific embodiments In order to describe the object, technical scheme and merit clearer, the further detailed description is stated in combination with the attached drawings and examples.
It is understood that the specific examples herein are only used to explain, not to limit the application.
A detection method for mining subsidence area based on the Mask R-CNN model is provided in an example, comprising: As shown in figure 1 to 3, in the invention, through the Mask R-CNN basic model, the mining subsidence is detected using the two adjacent SAR wrapped interferograms, which aims to operate easily while save time and storage space and to obtain a better mining subsidence detection model, based on which to evaluate the level of the surface activity.
Specification First, obtaining original SAR images and the orbital data and topographic data corresponding to the original SAR images; and using two adjacent SAR images to obtain a InSAR wrapped interferogram: Step 1: obtaining an original interferogram through interfering the adjacent SAR images; Step 2: removing the plain and terrain phase by DEM; Step 3: removing the effect of orbital error by a precise orbital data; Step 4: operating the interferograms in multi-view to suppress noises; Step 5: generating the interferograms into colorful pictures.
As shown in figure |, making a dataset based on the wrapped interferograms, and a sliced colorful interferogram is marked with the surface subsidence features of mining area. The generated document containing an.original image, a masked information and a marked masked image as the standard dataset format of training network model.
According to the activity duration and frequency of each mining subsidence area and generalization capability of the model, a method of generating InSAR wrapped interferogram for simulating mining subsidence is provided, as shown in figure 2, comprising the following steps: Step 1: using Gaussian surface function to model the surface deformation caused by mining, and obtaining the mining subsidence area with different settlements, boundary and forms by adjusting the parameters; Step 2: simulating the atmosphere phase through differentiating the atmospheric delay map obtained by GACOS; Step 3: simulating the noise phase through continuous uniform distribution function; Step 4: obtaining the dataset of simulated interferogram data after summing and wrapping the surface deformation, atmospheric error and random noise.
Based on the Mask R-CNN model and through the training of the dataset, the optimal detection model of mining subsidence area is obtained through dataset training and taking the machine learning evaluation index as the model training result Specification evaluation index; Step 1: dividing the real dataset into a training dataset and a validation dataset according to 4:1 to perform training on the Mask R-CNN basic model; Step 2: adding an iteration training model, taking comprehensive indexes of precision, recall, accuracy and F1-score as the model accuracy evaluation index; when the comprehensive accuracy reaches the highest, the mining subsidence area detection model using real dataset is obtained; Step 3: performing the step | and 2 by using the real and simulated mixed dataset to obtain the mining subsidence detection model using mixed dataset; Step 4: comparing the accuracy evaluation indexes of mining subsidence detection models using real dataset and mixed dataset to determine the final mining subsidence detection model.
As shown in figure 1, inputting the wrapped interferograms into the mining surface subsidence area detection model to detect the mining subsidence area and obtain the location and boundary. After obtaining the historical and the latest mining subsidence areas to determine the evolution state thereof and evaluate the level of surface activity (the activity duration and frequency of each mining subsidence area).
In figure 3, the mining surface subsidence detection model can be used to detect the mining subsidence area in the interferograms, the location and boundary of the mining subsidence area detected are basically consistent with the detection results by visual identification.
Figure 3 shows the subsidence duration, due to the mining subsidence area detection is applied to a separate interferogram, there is no overlapped time and the time span of each interferogram is known. Therefore, the accumulative duration is defined by summing the time spans of all interferograms for which a particular pixel is identified as "activity".
The above are only several embodiments with specific and detailed description of the invention, can not be understood as the limitation of the invention. It should be noted that, deformations and improvements can be made by the ordinary technicians in the field without departing from the conception of the invention and belong to the Specification protection scope of the invention. Therefore, the protection scope of the invention is defined by the attached claims.

Claims (5)

1. A detection method for mining subsidence area based on the Mask R-CNNmodel, characterized by, comprising: obtaining original SAR images, and the orbital data and topographic datacorresponding to the original SAR images; in combination with the orbital data and topographic data, two adjacent SARimages are used to obtain a InSAR wrapped interferogram; a sliced colorful interferogram based on the wrapped interferogram is markedmanually with the surface subsidence features of mining area to make a dataset thatcontains an original image, a masked information and a masked image; based on the Mask R-CNN model, the optimal mining subsidence area detectionmodel is obtained through dataset training and taking the machine learning evaluationindex as the model training result evaluation index; and inputting the wrapped interferogram into.the mining surface subsidence areadetection model to obtain the location and boundary of the mining subsidence area.
2. A detection method for mining subsidence area based on the Mask R-CNNmodel, characterized by: the determination of the wrapped interferogram, whichcomprises the following steps: obtaining an original interferogram through interfering the adjacent SAR images; removing the plain and terrain phase by DEM; removing the effect of orbital error by a precise orbital data; operating the interferograms in multilook to suppress noises; and generating the interferograms into colorful pictures.
3. A detection method for mining subsidence area based on the Mask R-CNNmodel, characterized by: the determination of the dataset, which comprises thefollowing steps: using Gaussian surface function to model the surface deformation caused bymining, and obtaining the mining subsidence area with different settlements,boundary and features by adjusting the parameters; simulating the atmosphere phase through differentiating the atmospheric delay map obtained by GACOS; simulating the noise phase through continuous uniform distribution function; and obtaining the dataset of simulated interferogram after summing and wrapping thesurface deformation, atmospheric error and random noise.
4. A detection method for mining subsidence area based on the Mask R-CNNmodel, characterized by: the determination of the mining surface subsidence areadetection model, which comprises the following steps: dividing the real dataset into a training dataset and a validation dataset accordingto 4:1 to perform training on the Mask R-CNN basic model; adding an iteration training model and taking comprehensive indexes ofprecision, recall, accuracy and Fl-score as the model accuracy evaluation index;When the comprehensive accuracy reaches the highest, the mining subsidence areadetection model using real dataset is obtained; performing the Mask R-CNN basic model by using the real and simulated mixeddataset to obtain the mining subsidence detection model using mixed dataset; and comparing the accuracy evaluation indexes of mining subsidence detectionmodels using real dataset and mixed dataset to determine the final mining subsidencedetection model.
5. A detection method for mining subsidence area based on the Mask R-CNNmodel, characterized by, the obtained location and boundary of the mining subsidencearea, comprising: performing the same operation as operating the historicalinterferogram, generating the wrapped interferogram together with the latest SARimage in the historical SAR dataset; inputting the obtained wrapped interferogram tothe mining surface subsidence area detection model to recognize the latest miningsubsidence area; comprising: after obtaining the historical and the latest mining subsidence areasto determine the evolution state thereof and evaluate the level of surface activity;wherein, the indexes of the level of surface activity comprises: the subsidenceduration and frequency of each mining subsidence area; and obtaining the subsidence duration of the mining subsidence area through multiplying the subsidence frequency by the time interval between SAR image acquisition
IE20230126U 2023-02-22 2023-04-26 A detection method for mining subsidence area based on the Mask R-CNN model IES87445Y1 (en)

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CN103091676A (en) * 2013-01-22 2013-05-08 中国矿业大学 Mining area surface subsidence synthetic aperture radar interferometry monitoring and calculating method
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CN113378945B (en) * 2021-06-17 2021-12-03 首都师范大学 Method for reconstructing high-spatial-temporal-resolution ground settlement information based on machine learning
CN114660598A (en) * 2022-02-07 2022-06-24 安徽理工大学 InSAR and CNN-AFSA-SVM fused mining subsidence basin automatic detection method
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