Prediction of the flooding of a mining reservoir in NW Spain

Álvarez, Rodrigo; Ordóñez, Almudena; Miguel, E. De; Loredo, C.

doi:10.1016/j.jenvman.2016.09.072

Cited by 20 publications

(14 citation statements)

References 17 publications

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“…The hydrogeological properties of the carboniferous materials in the area are generally poor in terms of permeability and storage properties. Previous authors (Ordóñez et al 2012;Álvarez et al 2016) have classified them into three hydrogeological groups: a) Shales and siltstones with very low hydraulic conductivities of 10 -7 -10 -8 m•s -1 ; b) Carboniferous sandstones and conglomerates, which show conductivities of around 10 -6 m•s -1 ; c) Carboniferous limestones and dolostones, whose permeability vary according to the extent of the karstification. These materials may have changed their natural properties in exploited zones, according to the stresses, extension and compression, caused by the mine works (see for example Younger and Adams 1999).…”

Section: Hydrogeological Propertiesmentioning

confidence: 99%

Conceptualization and finite element groundwater flow modeling of a flooded underground mine reservoir in the Asturian Coal Basin, Spain

González-Quirós

Fernández-Álvarez

2019

Journal of Hydrology

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Hydrogeological Propertiesmentioning

confidence: 99%

Conceptualization and finite element groundwater flow modeling of a flooded underground mine reservoir in the Asturian Coal Basin, Spain

González-Quirós

Fernández-Álvarez

2019

Journal of Hydrology

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“…The last hazard that was taken into consideration in the analysis of the development possibilities of hard coal mines is the water hazard (11). It is the possibility of sudden break-in of water, and a mixture of water and loose rock material to mining workings, posing a threat to workers [77,78]. The water hazard may come from the underground tanks, as well as rainwater in the case of shallow underground exploitation or open-pit mines.…”

Section: Natural Hazards Areamentioning

confidence: 99%

Method for Assessing the Development of Underground Hard Coal Mines on a Regional Basis: The Concept of Measurement and Research Results

Jonek-Kowalska

2018

Energies

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The functioning and development of the extractive industry depends on many unusual conditions that are not found in other industries, such as the size of deposits, the level of natural and technical hazards, geographic location, or the method of mineral extraction (open pit or underground). Therefore, it is difficult to use universal development assessment methods for such specific production units. As a result, the research undertaken in this article aims to develop an indicator method for evaluating the development potential of underground hard coal mines. This method is based on a theoretical and practical analysis of the conditions of functioning of hard coal mines, expert research, and multiple case studies verifying the operation of the presented development indicator. The first part of the article is devoted to identifying and analyzing the criteria for assessing the functioning of underground hard coal mines. Next, the essence and methodology of creating and interpreting the proposed indicator was presented. The second part of the article is empirical, and contains the results of the assessment carried out using the developed indicators for five Polish hard coal mines for the years 2011-2015. The results of the research indicate that the most important factors in the development of hard coal mines relate to the geological and mining conditions, and those concerning natural hazard levels. However, during the functioning, the financial conditions and related production conditions, which ultimately determine the survival and development of underground mining plants, gain in significance.

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“…All actions taken by coalmining enterprises to improve the health and wellness of employees and citizens require additional expenditures that increase mining production costs. However, the previous literature and research shows that these costs could be efficiently optimized [15][16][17].…”

Section: Literature Studies On Costs In Coal Mining In the Context Ofmentioning

confidence: 99%

Dependence of Total Production Costs on Production and Infrastructure Parameters in the Polish Hard Coal Mining Industry

Jonek-Kowalska¹,

Turek²

2017

Energies

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European hard coalmining is a declining industry, despite the use of hard coal for energy in several countries. Industry restructuring and public subsidies have failed to stop this industry's decline. The largest hard coalmining sector, the Polish sector, has faced an obstacle to its survival: How to reduce production costs to compete with less expensive imported hard coal? This article aims to identify and analyze the dependence of the total production costs representing production and infrastructure parameters of the Polish hard coalmining industry. The parameters are divided into three groups: (1) the cost of employees and the production volume; (2) the number of longwalls, the length of a longwall, the daily longwall advance and the preparatory work advance; and (3) the number of levels in exploitation, the number of layers in exploitation and the number of shafts. The findings indicate that, even in well-functioning coalmines, there are many economically irrational relationships, especially regarding employment and infrastructure size. This study shows that employment, which is a significant cost component of the production and infrastructure parameters of the examined Polish hard coalmines, is not economically rational in terms of its proportion to the total production costs. As a result, even a considerable reduction in employment or infrastructure does not influence the unit costs of mining production, which could only be partially explained by the high level of fixed costs. There are also no appropriate relationships between infrastructure parameters and the total production cost. Under these irrational conditions, a reduction in the production costs of hard coalmining enterprises is difficult, but unproductive costly activities could prevent an improvement in production efficiency. Only restoring the proper relationship between economic and infrastructure parameters and the total production costs can ensure a return to price competitiveness. Those actions are crucial for the Polish hard coalmining industry, because the research focused on successful hard coalmines that were not declining indicate it should be able to implement cost improvements.

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Prediction of the flooding of a mining reservoir in NW Spain

Cited by 20 publications

References 17 publications

Conceptualization and finite element groundwater flow modeling of a flooded underground mine reservoir in the Asturian Coal Basin, Spain

Conceptualization and finite element groundwater flow modeling of a flooded underground mine reservoir in the Asturian Coal Basin, Spain

Method for Assessing the Development of Underground Hard Coal Mines on a Regional Basis: The Concept of Measurement and Research Results

Dependence of Total Production Costs on Production and Infrastructure Parameters in the Polish Hard Coal Mining Industry

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