Geodetic Measurements of Modern Movements of the Earth Surface on Almaty Geodynamic Polygon

Omirzhanova, Zh.T.

doi:10.5593/sgem2017/22/s09.042

Cited by 2 publications

(1 citation statement)

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“…The stability of such a regional monitoring system is less than 1 mm per year in all three spatial coordinates. GNSS observations in the analyzed papers were integrated with the data obtained by various remote sensing methods, such as InSAR, LiDAR, and photogrammetry, into a single geodetic system, which allowed conducting successfully the interdisciplinary research [17]- [21].…”

Section: Statement Of the Problem And Research Topicalitymentioning

confidence: 99%

Studying sinkholes of the earth’s surface involving radar satellite interferometry in terms of Zhezkazgan field, Kazakhstan

Baltiyeva,

Orynbassarova,

Zharaspaev

et al. 2023

Min. miner. depos.

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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 algorithm 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.

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Section: Statement Of the Problem And Research Topicalitymentioning

confidence: 99%

Studying sinkholes of the earth’s surface involving radar satellite interferometry in terms of Zhezkazgan field, Kazakhstan

Baltiyeva,

Orynbassarova,

Zharaspaev

et al. 2023

Min. miner. depos.

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Strategies of GNSS processing and measuring under various operational conditions

Orynbassarova¹,

Shults²,

Roberts³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. GNSS technology is one of the key elements of maintenance of the mining works. Mostly, the GNSS observations in mining regions are accomplished under adverse surveying conditions. The presented paper is aimed at studying the problem of GNSS accuracy under various adverse operational conditions that may encounter during surveying works in deposit fields and downgrade the GNSS accuracy. Methodology. Despite the well-defined problem of GNSS accuracy, each year, new receiver models and software versions come into use, which in turn, needs a more profound analysis of their reliability, accuracy, and efficiency. This study provides relevant information about the static tests that were executed in the canopy, multipath, and open environments to assess the performance of the user segment from different manufacturers. The equipment of three manufactures was tested: Leica, Trimble, and Javad. The test results for two satellite systems, GPS and GLONASS, are presented. Findings. The obtained results can be generalized to the following outputs. Trimble performed the best on the canopy site in terms of position quality and fix solution. Javad had the best agreement for horizontal, height, and 3D solutions between dual and single frequency processing on the multipath site. On the open spot, Leicas horizontal solution between dual and single frequency processing was the most consistent. It is challenging to state which receiver performed better in the vegetation cover. Originality.The study aims to develop a general procedure to estimate the accuracy of different GNSS processing strategies under different environments. Practical value. The given research has a strong hands-on background insofar as the principal stress is made on field measurements. The research results can be employed to refine the GNSS surveying workflow for open-pit mines.

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Geodetic Measurements of Modern Movements of the Earth Surface on Almaty Geodynamic Polygon

Cited by 2 publications

References 0 publications

Studying sinkholes of the earth’s surface involving radar satellite interferometry in terms of Zhezkazgan field, Kazakhstan

Studying sinkholes of the earth’s surface involving radar satellite interferometry in terms of Zhezkazgan field, Kazakhstan

Strategies of GNSS processing and measuring under various operational conditions

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