scholarly journals Research on Dynamic Dissolving Model and Experiment for Rock Salt under Different Flow Conditions

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xinrong Liu ◽  
Xin Yang ◽  
Zuliang Zhong ◽  
Ninghui Liang ◽  
Junbao Wang ◽  
...  
Keyword(s):  
Rock Salt ◽  
Particle Swarm Optimization Algorithm ◽  
Flow Conditions ◽  
Salt Cavern ◽  
Development Direction ◽  
Calculation Results ◽  
Deep Rock ◽  
Artificial Intelligence Algorithm ◽  
Rock Salt Cavern ◽  
Strategic Reserve

Utilizing deep rock salt cavern is not only a widely recognized energy reserve method but also a key development direction for implementing the energy strategic reserve plan. And rock salt cavern adopts solution mining techniques to realize building cavity. In view of this, the paper, based on the dissolving properties of rock salt, being simplified and hypothesized the dynamic dissolving process of rock salt, combined conditions between dissolution effect and seepage effect in establishing dynamic dissolving models of rock salt under different flow quantities. Devices were also designed to test the dynamic dissolving process for rock salt samples under different flow quantities and then utilized the finite-difference method to find the numerical solution of the dynamic dissolving model. The artificial intelligence algorithm, Particle Swarm Optimization algorithm (PSO), was finally introduced to conduct inverse analysis of parameters on the established model, whose calculation results coincide with the experimental data.

scholarly journals Probabilistic Analysis of a Rock Salt Cavern with Application to Energy Storage Systems

2016 ◽  
Vol 50 (1) ◽  
pp. 139-157 ◽  
Author(s):  
Elham Mahmoudi ◽  
Kavan Khaledi ◽  
Shorash Miro ◽  
Diethard König ◽  
Tom Schanz
Keyword(s):  
Energy Storage ◽  
Rock Salt ◽  
Probabilistic Analysis ◽  
Storage Systems ◽  
Energy Storage Systems ◽  
Salt Cavern ◽  
Rock Salt Cavern

Research on the Technology of Three-Dimensional Surface Topological Reconstruction of Underground Rock Salt Cavern Based on Sonar Detection Data

2012 ◽  
Vol 500 ◽  
pp. 218-225
Author(s):  
Jian Zhong Chen ◽  
Ye Hua Sheng ◽  
Yong Zhi Wang
Keyword(s):  
Rock Salt ◽  
Three Dimensional ◽  
Scientific Basis ◽  
Boundary Representation ◽  
Surface Model ◽  
Social Significance ◽  
Technological Support ◽  
Salt Cavern ◽  
Rock Salt Cavern ◽  
Dimensional Surface

After analyzing the characteristics of rock salt and the feasibility and importance of using underground rock salt cavern as energy stockpiles, this paper explains in detail about the principle of sonar detection technology in cavern measuring and its data organization. This paper studies the technology of three-dimensional surface topological reconstruction of underground rock salt cavern based on sonar detection data with half-edge data structure and boundary representation models. Meanwhile, by conducting validity check for constructed surface model and repair of possible defects, the paper finds correct and effective three-dimensional surface models of underground rock salt cavern, and provides effective data base for the stability analysis, creep analysis and other numerical simulations of underground rock salt cavern. This method, with important economic and social significance, can provide a scientific basis and technological support for the construction of caverns, especially for the safe and rational use of underground rock salt cavern.

scholarly journals Innovative Concept for Analysing a Rock Salt Cavern under Cyclic Thermo-mechanical Loading

2016 ◽  
Vol 97 ◽  
pp. 478-485
Author(s):  
A.v. Blumenthal ◽  
E. Mahmoudi ◽  
K. Khaledi ◽  
D. König ◽  
T. Schanz
Keyword(s):  
Mechanical Loading ◽  
Rock Salt ◽  
Salt Cavern ◽  
Rock Salt Cavern ◽  
Innovative Concept

scholarly journals Critical Length and Collapse of Interlayer in Rock Salt Natural Gas Storage

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Yingjie Wang ◽  
Jianjun Liu
Keyword(s):  
Mathematical Model ◽  
Rock Salt ◽  
Critical Length ◽  
Gas Storage ◽  
Mechanical Instability ◽  
Calculation Results ◽  
The Stability ◽  
Salt Cavern Gas Storage ◽  
The Mathematical Model ◽  
Physical And Mechanical Characteristics

The existence of an interlayer has a significant effect on the stability of a rock salt gas storage cavity; therefore, an uncontrollable collapse of the interlayer would cause a series of issues. In this study, three types of mechanical instability criteria are comprehensively calculated. The limit radius of the interlayer is computed under different criteria, and the collapse radius of the interlayer is obtained by comparison. The calculation results of the mathematical model are highly accurate with respect to actual engineering logging data, in general with over 90% of accuracy. It is demonstrated that, besides the physical and mechanical characteristics of the sandwich, the location of the interlayer in the cavity and concentration of the brine also have an important effect on the collapse of the interlayer. The brine at the bottom of the cavity is nearly saturated. Therefore, an interlayer at this location does not easily collapse. The mathematical model established in this study is used in the seismic design and prediction of interlayer collapse during the construction of salt-cavern gas storage facilities in China.

Rock Long-Term Strength Parameters Determination of a Salt Cavern Gas Storage

2013 ◽  
Vol 353-356 ◽  
pp. 1685-1688
Author(s):  
Li Na Ran ◽  
Hua Bin Zhang ◽  
Zhi Yin Wang
Keyword(s):  
Mechanical Properties ◽  
Rock Salt ◽  
Gas Storage ◽  
Surrounding Rock ◽  
Creep Process ◽  
Term Strength ◽  
Salt Cavern ◽  
Study Results ◽  
Salt Cavern Gas Storage

In order to determine the long-term mechanical properties of surrounding rock of salt cavern gas storage, long tri-axial creep test studies on rock salt of the field were carried out. Based on the test data, long-term strength of rock salt was determined, and comparatively analysis was conducted combined with of the instantaneous test. The study results show that: Considering the axial strain, radial strain and volumetric strain to determine the long-term strength of rock salt can ensure reliability of the results. Under the same condition, the less salt content, the value of long-term strength is higher. Tri-axial creep process has a different effect degree between cohesion and internal friction angle; it is more sensitive to cohesion. The strain limit should be considered for the stability analysis of multi-bedded salt cavern gas storage construction and pay more attention about the mechanical properties of the interlayer parts. The study results provide references for researching the surrounding rock long-term mechanical properties of salt cavern gas storage.

Failure Mechanism of Layered Salt Rock in Three-Point Bending Test

2012 ◽  
Vol 256-259 ◽  
pp. 48-56 ◽  
Author(s):  
Jing Yang Ding ◽  
Jia Dun Liu ◽  
Chao Li ◽  
Hai Yang Yi
Keyword(s):  
Rock Salt ◽  
Tensile Failure ◽  
Bending Test ◽  
Salt Rock ◽  
Three Point Bending ◽  
Initiation And Propagation ◽  
Calculation Results ◽  
Bridging Model ◽  
Weak Plane ◽  
Dip Angle

Sample of layered rock salt was subjected to three-point bending test with SHIMADZU SEM (Scanning Electron Microscope) system monitoring. Initiation and propagation of crack in both salt rock and mudstone impurity were recorded, so was the micro-structure in the interface between rock salt and mudstone impurity. By analyzing the SEM photos of failed sample, it is found that crack initially comes out in salt rock or mudstone impurity rather than the interface. Three-point bending test was numerically calculated based on bridging model. Calculation results show that the interface is not weak plane, and that the failure mode of salt rock and mudstone impurity is closely correlated with the dip angle of the infinitesimal element of the interface. When the dip is larger than 70°, tensile failure firstly occurs in mudstone impurity. When the dip is smaller than 70° , tensile failure initiates in salt rock.

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