Ecological aspects of filling of worked-out area during underground coal mining

Buzylo, Volodymyr; Pavlychenko, Artem; Borysovska, Olena

doi:10.1051/e3sconf/202020101038

Cited by 6 publications

(7 citation statements)

References 40 publications

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“…At the same time, the proposed solutions in the field of mothballing already spent coal mines with various grouting solutions and waste rock cannot be considered an innovative and progressive solution, since the carbon footprint from the extraction and use of hard or brown coal in the energy sector is one of the largest. Therefore, it is advisable to completely abandon such an energy carrier, especially since the restoration of land and forests after the mothballing of coal mines is quite slow (relative to human life, on average about 60 years) (Buzylo et al, 2020;Motosugi et al, 2021).…”

Section: Literature Reviewmentioning

confidence: 99%

Methodology for Assessing Financial Results of Implementation of Energy Innovations Depending on their Progressiveness

Dudin

Засько

Dontsova

et al. 2022

IJEEP

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The purpose of this article is to develop a methodology that can be used for an objective assessment of financial results and to support managerial decision-making regarding the implementation of energy innovations. The methodology is developed using an interdisciplinary approach and is based on the fuzzy logic theory and method, which allows converting expert judgments and qualitative assessments into final quantitative indicators with some degree of confidence. The methodology includes five input variables that form a fuzzy set "progressivity versus regressivity of energy innovations". The article considers the main criteria based on which an energy innovation can be classified as technologically progressive or regressive. The article demonstrates the efficiency of the developed methodology drawing on the example of two projects for the implementation of energy innovations. The data obtained have shown that one of the innovations can be considered conditionally technologically progressive only by 46%, while the second is certainly technologically progressive by 92%. The conducted correction of the basic financial results allows demonstrating that the implementation project of a conditionally technologically progressive innovation is not cost-effective and requires an increase in capital expenditures or a reduction in expected revenues since it requires a balanced assessment of the feasibility of implementing innovation.

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Section: Literature Reviewmentioning

confidence: 99%

Methodology for Assessing Financial Results of Implementation of Energy Innovations Depending on their Progressiveness

Dudin

Засько

Dontsova

et al. 2022

IJEEP

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“…High-water backfill materials (HWBMs) have high early strength, a short gelling time, a simple construction technology, and other advantages [ 1 , 2 , 3 ]. Many mines have used HWBMs for goaf filling and roadway side support [ 4 , 5 , 6 ]. However, filling materials with a high-water content are expensive and decrease in strength with the passage of time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

Yan

Liu

et al. 2023

Materials

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As a key node in the promotion of the “Western Development” strategy in Xinjiang, China, the large-scale mining of coal resources is bound to cause a series of ecological and environmental problems, such as surface subsidence. Desert areas are widely distributed in Xinjiang, and from the perspective of reserves and sustainable development, it is crucial to fully utilize desert sand to make filling materials and predict its mechanical strength. In order to promote the application of High Water Backfill Material (HWBM) in mining engineering, a modified HWBM doped with Xinjiang Kumutage desert sand was used to prepare a desert sand-based backfill material, and its mechanical properties were tested. The discrete element particle flow software PFC3D is used to construct a three-dimensional numerical model of desert sand-based backfill material. The parameters such as sample sand content, porosity, desert sand particle size distribution, and model size are changed to study their impact on the bearing performance and scale effect of desert sand-based backfill materials. The results indicate that a higher content of desert sand can effectively improve the mechanical properties of HWBM specimens. The stress–strain relationship inverted by the numerical model is highly consistent with the measured results of desert sand-based backfill materials. Improving the particle size distribution of desert sand and reducing the porosity of filling materials within a certain range can significantly improve the bearing capacity of desert sand-based backfill materials. The influence of changing the range of microscopic parameters on the compressive strength of desert sand-based backfill materials was analyzed. This study provides a desert sand-based backfill material that meets the requirements of mine filling, and predicts its strength through numerical simulation.

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“…The extraction of the coal seam involves disturbance of the natural equilibrium and stability of the rock mass [6,7], as well as water inflow to the mine openings due to the discharge of aquifers. If the mine drainage plants stop and mine water is not pumped out, it will gradually flood the mine openings, due to manmade rock jointing, the groundwater levels in the carbon deposits will rise [5].…”

Section: Introductionmentioning

confidence: 99%

Assessment of coal mining impact on the geoecological transformation of the Emerald network ecosystem

Novitskyi,

Masiuk,

Hapich

et al. 2023

Nauk. visn. nat. hirn. univ.

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Purpose. Geoecological assessment of impact on the ecosystem transformation of a part of Emerald Network object “Samarskyi Lis – UA0000212” caused by coal mining at the section of “Ternivska” mine (Dnipropetrovsk region, Ukraine) using the methods of remote sensing of the Earth in conditions of limited access to the study object due to the state of martial law in Ukraine. Methodology. A complex of standardized field, paper, laboratory and statistical research methods was used. When studying aquatic vegetation, generally accepted methods for describing the species and coenotic composition of vegetation and hydrobotanical mapping were used. The study on soil vegetation was carried out with the selection and description of the main phytocenoses, features of their composition and distribution on the territory. Floristic studies were carried out according to the method for collecting herbarium material. Field routes were carried out on the land surface along the mining of the coal bed with the recording of destructive changes in the landscape (falls, top-soil breaks, sufosis manifestations, cracks, lowering of the relief) and plant groups – the colour and condition of tree, shrub and grass vegetation. In order to compare visual observation data and obtain representative and reliable research results, the facility was monitored additionally using modern geoinformation systems. A satellite observation tool was used; it allowed searching, processing, and obtaining information from satellite data according to various indexes: WRI, NDWI, MNDWI, NDSI. Findings. Negative consequences of the impact of the coal mine “Ternivska” on the geological and ecological transformation of the Emerald network ecosystem “Samarskyi Lis – UA0000212” have been established. It has been proven that long-term underflooding and flooding of lands leads to a change in the species composition of the forest stand, the death of the understory and grass layer, and the complete destruction of the existing plant and animal communities. In flooded areas of oak forests and pine plantations, forest species die out and wetland plant species spread. Over three years (2020–2023), the area of visible and established flooding according to remote sensing data has increased from 1 to 6 hectares, respectively. Originality. Dynamics of the process of the land surface subsidence and protected area flooding has been established according to the data of open-source geoinformation systems and the comparison of various satellite data indexes (WRI, NDWI, MNDWI, NDSI). Gradual changes in the species composition of the forest stand, the death of the understory and the grass layer were revealed. It has been confirmed that long-term flooding leads to the complete destruction of existing plant and animal communities, the destruction of compound complexes of soil mesofauna makes development impossible for the terrestrial invertebrate species that lived in these biotopes before their destruction, including species from the Red List of Ukraine and protected by the Berne Convention. Practical value. In the conditions of limited access for conducting direct geodetic and engineering-geological studies, the methodology of using modern GIS by combining various spectral channels (indexes) is substantiated to determine and study the dynamics of the underflooding (flooding) process in the territory. In combination with traditional field geobotanical research, the results of monitoring observations of the coal mining activity and its impact on the geoecological transformation of the ecosystem of the Emerald Network object are presented for the first time in the region. The negative impact of mining activity on natural conservation areas, which leads to the death and gradual change in the species composition of plants, has been determined.

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Ecological aspects of filling of worked-out area during underground coal mining

Cited by 6 publications

References 40 publications

Methodology for Assessing Financial Results of Implementation of Energy Innovations Depending on their Progressiveness

Methodology for Assessing Financial Results of Implementation of Energy Innovations Depending on their Progressiveness

Numerical Investigation on the Compressive Behavior of Desert Sand-Based Backfill Material: Parametric Study

Assessment of coal mining impact on the geoecological transformation of the Emerald network ecosystem

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