RT info:eu-repo/semantics/article
T1 Technical feasibility of lined mining tunnels in closed coal mines as underground reservoirs of compressed air energy storage systems
A1 Schmidt, Falko
A1 Menéndez, Javier
A1 Konietzky, Heinz
A1 Jiang, Zhongming
A1 Fernández Oro, Jesús Manuel
A1 Álvarez de Prado, Laura
A1 Bernardo Sánchez, Antonio
A2 Ingeniería CartograficaGeodesica y Fotogrametria
K1 Ingeniería de minas
K1 Closed Coal Mine
K1 Energy Storage
K1 CAES
K1 Underground Reservoir
K1 Feasibility Study
K1 3318.01 Minería del Carbón
K1 3322.05 Fuentes no Convencionales de Energía
K1 3322.01 Distribución de la Energía
K1 5312.05 Energía
AB [EN] In this paper, four mining levels in a closed coal mine in the Asturian Central Coal Basin (NW Spain) have been selected as a case study to investigate the technical feasibility of underground compressed air energy storage systems. First, in order to determine the suitable level and type of concrete lining, a numerical model has been established to analyze the geomechanical performance considering air pressures of 6, 10, 20 and 25 MPa and three different embodiments of concrete lining. Then, another numerical model is used to study the coupled thermo-mechanical performance at level 3, considering 100 operation cycles between 6 and 10 MPa air pressure using a circular concrete lining with a 20 mm thick sealing layer. The results obtained indicate that the deformations are lower at levels 1 and 3, where the shales are located at the top of the coal seam. Deformations and tensile stresses are significantly reduced when a circular concrete lining is used. As the thermal analysis shows, temperature fluctuations are restricted to sealing layer and concrete lining and do not reach the rock mass itself. Therefore, negligible deformations are produced by the effect of temperature compared to the effect of air pressure. Maximum tensile stress and total displacements during the operation occur at the top of the mining drift and reach 9.5 MPa and 3.6 mm, respectively. A technical feasibility can be achieved using a circular concrete lining with a suitable reinforcement system.
PB Elsevier
SN 2352-152X
LK https://hdl.handle.net/10612/18810
UL https://hdl.handle.net/10612/18810
NO Schmidt, F., Menéndez, J., Konietzky, H., Jiang, Z., Fernández-Oro, J. M., Álvarez, L., & Bernardo-Sánchez, A. (2024). Technical feasibility of lined mining tunnels in closed coal mines as underground reservoirs of compressed air energy storage systems. Journal of Energy Storage, 78, 110055. https://doi.org/10.1016/J.EST.2023.110055
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 14-jun-2024