Methods for monitoring the earth surface displacement at points of small geodetic network under the underground method of coal development

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Authors:

Т. К. Issabek, Dr. Sc. (Tech.), Prof., orcid.org/0000-0001-7718-933X, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. F. Dyomin, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-1718-856X, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D. Т. Ivadilinova, orcid.org/0000-0002-9731-0587, Karaganda State Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. Developing an efficient and high accuracy methodology of observing the earth surface deformations when mining minerals by the underground method.

Methods. Experimental grapho-analytical methods as well as mathematical modeling were applied.

Findings. There is presented a methodology and results of processing the data of observations of the earth surface displacements when mining coal at Kostenko mine of the Coal Department of ArcelorMittal Temirtau JSC, Karaganda Coal Basin. The displacement measurements were performed at points of the small geodetic network using the GNSS technologies with accuracy acceptable for the satellite geodetic network of class 1.

The results confirm the GNSS methods effectiveness in studying the earth surface displacements in coal mine conditions. Displacement vectors of the GNSS points were determined; numerical values of the relative vertical and horizontal displacements of the points were obtained.

Originality. A new technique for making geodesic measurements was developed when studying the earth surface displacements during its underworking by means of building local small geodynamic networks. For the first time the observations of the earth surface displacements due to its undermining in the territory of the Karaganda coal basin were carried out not along the profile lines but as a result of a detailed surface survey.

Practical value. The proposed method for performing geodetic measurements using the GNSS technology to study the earth displacements has made it possible to determine the parameters of the displacement process with a high degree of accuracy and can serve as the basis for organizing geodetic monitoring at all the mines of the Karaganda coal basin. The main tool for monitoring man-made processes was a network of specially designed benchmarks in the field. With systematic monitoring, when initially there are implemented the measures to form a geodynamic polygon, the greatest degree of prediction of the risks of field exploitation is achieved.

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