Studying sinkholes of the earth’s surface involving radar satellite interferometry in terms of Zhezkazgan field, Kazakhstan
Baltiyeva A. Orynbassarova E. Zharaspaev M. Akhmetov R.
2023Dnipro University of Technology
Mining of Mineral Deposits
2023#17Issue 461 - 74 pp.
Purpose is to assess the potential of radar satellite interferometry (SAR interferometry) to analyze and forecast earth’s surface displacements. Methods. The study involves the analysis of previous instrumental observations, such as high-precision levelling and seismic monitoring. The observations using global navigation satellite systems (GNSS) were carried out; satellite images were processed applying a method of sequential interferometry of persistent radar signal scatters (PS). Findings. The research results have proved similarity between the data obtained with the help of ground instrumental methods and the data received using satellite interferometry. Two types of the earth’s surface sinkholes were identified: sinkholes with smooth subsidence and hidden deformations that are not accompanied by the preliminary deformational or seismic signs. Smooth subsidence is controlled and predicted successfully with the help of the SAR interferometry methods. An algo-rithm has been represented to predict linear displacement trends at different time intervals involving a finite element method. Originality. is in a complex approach of the research performance covering the following: comparative analysis of different monitoring methods, studying different sinkhole types, identifying limitations of the available methods, and proposing new approaches for more accurate and objective analysis of the earth’s surface deformation within the field. Practical implications. The research results are of practical value for rock mechanic specialists and mining operators. They can use the data to monitor and control earth’s surface caving as well as provide staff safety and preserve ground infrastructure where it is possible.
earth’s surface , forecast , SAR interferometry , sinkholes , underground voids
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D.A. Kunayev Mining Institute, Almaty, Kazakhstan
Satbayev University, Almaty, Kazakhstan
Kazakhmys Corporation LLP, Zhezkazgan, Kazakhstan
D.A. Kunayev Mining Institute
Satbayev University
Kazakhmys Corporation LLP
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