Three-Dimensional Geological Modeling of Mining Subsidence Prediction Based on the Blocks

Liu, Ji Bo; Dai, Hua Yang; Xiao, Wang; Aitkazinova, Sh; Madimarova, Gulmira

doi:10.4028/www.scientific.net/amr.905.697

Cited by 2 publications

(2 citation statements)

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“…This issue not only underscores the inherent complexities in geological processes but also emphasizes the need for innovative solutions. Despite the remarkable strides in science and technology, the accurate prediction of these surface displacements remains elusive, presenting persistent obstacles to both scientific inquiry and practical applications [32]- [35]. This paper explores the potential of radar satellite interferometry (SAR interferometry) for the analysis and prediction of the Zhezkazgan field sinkholes.…”

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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“…Therefore, reducing carbon emissions from the coal industry is a necessary step to control global warming. At the same time, it should be noted the negative impact of coal mining on the environment, especially the formation of large waste dump areas [4], and soil contamination within the boundaries of mining allotments [5,6].…”

Section: Introductionmentioning

confidence: 99%

Managing the process of underground coal gasification

Saik,

Lozynskyi,

Anisimov

et al. 2023

Nauk. visn. nat. hirn. univ.

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Purpose. The research purpose is to determine the efficiency parameter of the coal gasification process based on the analysis of the composition of combustible gases (Н2, СН4, СО) and the producer gas calorific value, depending on the methods of supplying the blast mixtures to the gasifier oxidative zone. Methodology. A laboratory setup is used to perform experimental research into underground coal seam gasification. Its constituent segments are a stand, branches for supplying blast and gas-outlet mixtures, as well as a flow control system. This setup makes it possible to model the coal seam occurrence according to the mining-geological conditions of its occurrence. When determining the gasification process efficiency, two methods of supplying the blast mixture are tested: through a blast injection well and combined method (blast injection well + controlled pipeline). The generated producer gas calorific value has been determined analytically according to the “additivity rule”, taking into account the concentration of each combustible gas and its calorific value. Findings. The underground gasifier efficiency when changing the method of supplying the air mixture has been substantiated. Based on qualitative data on the concentration of combustible gasifier gases at the outlet of a modeled underground gasifier, conditions for increasing their concentration have been characterized and time intervals have been determined, through which their decrease occurs with increasing outgassed space. Originality. It has been revealed that the use of combined blast method in an underground gasifier causes a double supply of oxidizing agent to the gasification zone. This intensifies the gasification process by expanding the gasification reaction zones both along the length of the gasification column and along the seam thickness. Also, the combined method of supplying the blast mixture is characterized by improved thermal stability and gas formation parameters. Practical value. The research results make it possible to quickly make technological decisions for changing the operating modes of the underground gasifier, as well as determine the optimal method for supplying air mixtures, which improves the quality and calorific value of the producer gas. When changing the blast supply method to a combined method, the average concentration of Н2, СН4 and СО combustible gases increases by 3.85 %, and the calorific value increases by an average of 0.53 MJ/m3.

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Three-Dimensional Geological Modeling of Mining Subsidence Prediction Based on the Blocks

Cited by 2 publications

References 1 publication

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

Managing the process of underground coal gasification

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