Numerical calculations of main stress in the rock massif around salt cavern for compressed air storage

Polański, K.

doi:10.1088/1755-1315/214/1/012079

Cited by 2 publications

(9 citation statements)

References 5 publications

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“…The authors analysed the optimal distribution of these caverns and their influence on the surrounding rock mass. Polański [24] carried out analyses of changes in the strain-stressing state of the caverns during thermal change, which is observed during gas injection and cavern emptying processes. The numerical analysis carried out for an exemplary cavern modelled by Norton's rheological model [15,[24][25][26] showed that the thermal change implemented in the solutions affects the state of the cavern in a small range and should be taken into account when analysing the area up to 50m from the cavern axis in detail (for caverns with a diameter of 30-35 m).…”

Section: Methods For Determining Changes In Rock Mass Deformation Formentioning

confidence: 99%

Surface Deformations Caused by the Convergence of Large Underground Gas Storage Facilities

et al. 2021

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The article presents a method of forecasting the deformation of the land surface over large fields of underground gas storage facilities located in salt caverns. The solution allows for taking into account many parameters characterising the operation of underground gas storage facilities, such as cavern processes (leaching, enlargement, operational, etc.), their depth, distribution, diameter, shape, and many others. The advantage of the applied method over other available options is the possibility of using it for large fields of caverns while keeping the calculations simple. The effectiveness of the method has been proven for predicted surface subsidence for the EPE field with 114 underground caverns. The hypothesis was compared with the measurement outcomes.

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Section: Methods For Determining Changes In Rock Mass Deformation Formentioning

confidence: 99%

Surface Deformations Caused by the Convergence of Large Underground Gas Storage Facilities

et al. 2021

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“…The heat transfer coefficient U and the A cav area are values that cannot be easily determined [9,10], therefore the relationship U A c V should be replaced by the effective heat transfer coefficient [10], which is a function of the air mass flow rate during injection and the downloading of compressed air from the cavern: (8) where:…”

Section: Balance Of Mass and Energy In The Cavern For Steady-state Conditionsmentioning

confidence: 99%

“…During the assessment of cavern stability, the stresses and effective deformations were used [8]. An analysis of the distribution of the rock mass effort around the cavern in the selected model elements at the edge of the cavern was also carried out.…”

Section: Numerical Model Of Caes Salt Cavern Operationmentioning

confidence: 99%

“…Therefore, the numerical creep law calculations in the model implemented Norton's law; these were performed to verify the extent of the influence of temperature changes on the deformation-stress state around the storage cavern. These results were compared [8], which showed that the influence of temperature on the deformation-stress state is important at a distance of less than 50 m from the cavern axis (for a cavern diameter of 30-35 m). At a greater distance, the models begin to converge [8].…”

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confidence: 99%

“…These results were compared [8], which showed that the influence of temperature on the deformation-stress state is important at a distance of less than 50 m from the cavern axis (for a cavern diameter of 30-35 m). At a greater distance, the models begin to converge [8].…”

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confidence: 99%

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Influence of the Variability of Compressed Air Temperature on Selected Parameters of the Deformation-Stress State of the Rock Mass Around a CAES Salt Cavern

Polański

2021

Energies

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The article presents the results of a numerical simulation of the deformation-stress state in the rock mass around a salt cavern which is a part of a CAES installation (Compressed Air Energy Storage). The model is based on the parameters of the Huntorf power plant installation. The influence of temperature and salt-creep speed on the stability of the storage cavern was determined on the basis of the three different stress criteria and the effort of the rock mass in three points of the cavern at different time intervals. The analysis includes two creep speeds, which represent two different types of salt. The solutions showed that the influence of temperature on the deformation-stress state around the CAES cavern is of importance when considering the stress state at a distance of less than 60 m from the cavern axis (at cavern diameter 30–35 m). With an increase in cavern diameter, it is possible that the impact range will be proportionately larger, but each case requires individual modeling that includes the shape of the cavern and the cavern working cycle.

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Numerical calculations of main stress in the rock massif around salt cavern for compressed air storage

Cited by 2 publications

References 5 publications

Surface Deformations Caused by the Convergence of Large Underground Gas Storage Facilities

Surface Deformations Caused by the Convergence of Large Underground Gas Storage Facilities

Influence of the Variability of Compressed Air Temperature on Selected Parameters of the Deformation-Stress State of the Rock Mass Around a CAES Salt Cavern

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