The Study of Coupling Law of Stress Field / Seepage Field in Permeable Stratum Medium

2011 ◽  
Author(s):  
Zhijun Zhou ◽  
Min Zhao
Keyword(s):  
Stress Field ◽  
Seepage Field ◽  
Permeable Stratum

scholarly journals Evolution Pattern and Matching Mode of Precursor Information about Water Inrush in a Karst Tunnel

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1579
Author(s):  
Jie Song ◽  
Diyang Chen ◽  
Jing Wang ◽  
Yufeng Bi ◽  
Shang Liu ◽  
...  
Keyword(s):  
Rock Mass ◽  
Stress Field ◽  
Displacement Field ◽  
Water Inrush ◽  
Seepage Field ◽  
Karst Tunnel ◽  
Rock Mass Structure ◽  
Evolution Pattern ◽  
Water Blocking ◽  
Precursor Information

The water inrush of the Shangjiawan karst tunnel is used to study the evolution pattern of precursor water inrush information in water-filled caves and to further reveal the matching mode of the information. The three-dimensional numerical method FLAC3D was used to simulate the evolution process of water inrush after damage to a water-blocking rock mass structure in a water-filled cave and to obtain the evolution pattern of precursor water-inrush information caused by the damage. The results show that the multifield response to the characteristic precursor information of the water-inrush pattern after the fracture of the water-blocking rock mass follows the order of stress-field displacement-field seepage-field. Further, the matching pattern of the information shows that the stress field increased first and then decreased, the displacement field always increased, and the seepage field increased first and then decreased.

Numerical Simulation of Interaction of Cut-Off Wall and Earth-Rock Dam in the Reinforcement Project

2012 ◽  
Vol 170-173 ◽  
pp. 2181-2187
Author(s):  
Jiang Lin Gao ◽  
Zhi Gang Yang ◽  
Shu Wang Yan
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Stress Field ◽  
Design Method ◽  
Construction Technology ◽  
Seepage Field ◽  
Coupled Numerical Model ◽  
Coupling Calculation ◽  
Design Calculations ◽  
Comprehensive Study

Concrete cut-off wall has been widely used in the reinforcement project of earth-rock dam. Its design method and construction technology are comparatively mature, but comprehensive study of interaction of cut-off wall and dam is few, especially for the case that new cut-off wall built in earth-rock dam. In order to discuss the principal and law of interaction of cut-off wall and earth-rock dam in the reinforcement project, seepage field and stress field coupled numerical model was established by using ABAQUS. The contact between the wall and the dam together with the coupling of the stress and the seepage were taken into account in the model. Through coupling calculation of typical earth-rock dam project, the results show that, the model is feasible to simulate the interaction of cut-off wall and earth-rock dam, and the method can provide reference for design calculations of cut-off wall in reinforcement project of earth-rock dam.

Analysis on Mechanism of Coupling Fields of Seepage and Stress and its Modeling

2014 ◽  
Vol 919-921 ◽  
pp. 1211-1215
Author(s):  
Fei Han Wang ◽  
Guo Xin Yan ◽  
De Jun Zhao
Keyword(s):  
Mathematical Model ◽  
Stress Field ◽  
Stress Fields ◽  
Coupling Mechanism ◽  
Seepage Field ◽  
Soil Media ◽  
Rock And Soil ◽  
System Analyzing

In rock and soil media, seepage and stress fields are interacting and interrelated system. Analyzing on mechanism of seepage field acting on stress field and on mechanism of stress field acting on seepage field in rock and soil media, it established mathematical model of seepage field with stress field acting on and mathematical model of stress field with seepage field acting on. According to coupling mechanism, it gave mathematical model of coupling seepage field and stress field and corresponding steps of FEM

Stabality Analysis of Deep Roadway Based on Coupled Thermo-Hydro-Mechanical Behaviors

2012 ◽  
Vol 594-597 ◽  
pp. 2564-2568
Author(s):  
Qi Feng Guo ◽  
Fen Hua Ren ◽  
Zhao Cai Zhang
Keyword(s):  
Temperature Field ◽  
Numerical Model ◽  
Stress Field ◽  
Constitutive Relation ◽  
Mechanical Behaviors ◽  
Seepage Field ◽  
Mechanical Equation ◽  
Rock Temperature ◽  
Ground Stress ◽  
The Stability

In order to research the stability of excavation in deep mines under high ground stress, high rock temperature and high karst hydraulic, the interaction of stress field, seepage field and temperature field are discussed through basic constitutive relation, seepage equation, thermometer equation and coupled thermo-hydro-mechanical equation. A numerical model was built to simulate the excavation of deep roadway. The result shows that the simulated ground stress based on three fields coupled is much closer to the field measured value and the change of stress and displacement caused by the excavation are limited which is about same as the later monitoring.

The Finite Element Analysis of Coupling Law of Single Phase Stress Field / Seepage Field in Permeable Stratum Medium

2011 ◽  
Vol 71-78 ◽  
pp. 3067-3070
Author(s):  
Yu Fen Mei
Keyword(s):  
Finite Element ◽  
Porous Medium ◽  
Stress Field ◽  
Single Phase ◽  
Average Stress ◽  
Seepage Field ◽  
Element Analysis ◽  
Finite Element Software ◽  
Total Displacement ◽  
Contrast Analysis

The research of reservoir fluid-solid coupling theory is hot issues in home or foreign recently, In oil, civil, environment and geology, mining and other fields with a wide application. On the basis of summarizing the predecessors' achievements，according to the basic theory of rock mechanics, fluid mechanics in porous medium, geologic mechanics, calculated mechanics and fluid-solid coupling seepage, a mathematical and numerical model of seepage field and stress field coupling is developed in porous medium and the LiuNan blocks of JiDong oilfield wells.based area single phase Stress Field / Seepage Field in solving with the method of finite element software ANSYS, Contrast analysis of LiuNan blocks Coupling around of Field / Seepage Field is the change of average stress and total displacement. As can be seen from Table 3, after coupling the value of average stress and total displacement are greater than before coupling.The results show than it is important meaning for used to solve practical engineering problems.

Finite Element Analysis for the Stress Field and Seepage Field Interaction within Qingdao Submarine Tunnel Rockmass

2013 ◽  
Vol 405-408 ◽  
pp. 1278-1282
Author(s):  
Cheng Li ◽  
Tai Quan Zhou ◽  
Sha Sha Jiang ◽  
Jie Kong
Keyword(s):  
Finite Element ◽  
Rock Mass ◽  
Stress Field ◽  
Plastic Region ◽  
Tunnel Lining ◽  
Secondary Stress ◽  
Seepage Field ◽  
Element Analysis ◽  
Severe Condition ◽  
Finite Element Software

The submarine geology characteristic for Qingdao submarine tunnel is fracture and fragmentation with smash rock mass and unevenly distributed rock mass strength. The submarine tunnel is excavated in a weathered rock mass containing water. Before the tunnel lining is constructed, it is important to assure the stability and safety for the rock tunnel and tunnel lining structure during construction and operational periods. As the submarine tunnel is under severe condition, the rock mass stabilization is to a large extent to be determined by the underwater seepage effect. It is fundamental to investigate how the seawater interacts with the tunnel rock mass stress field. To investigate the interaction between the rock mass seepage field and the secondary stress field, the nonlinear finite element software ABAQUS is used to analyze the interaction behavior between the rock mass seepage effect and the tunnel secondary stress field. The rock mass seepage field, stress field are analyzed in detail using the numerical simulation method. Also, the distribution of the tunnel rock mass plastic region is obtained. The numerical analysis results provide guidance for the submarine tunnel construction.

scholarly journals On distribution characteristics of the temperature field and gas seepage law of coal in deep mining

2020 ◽  
Vol 24 (6 Part B) ◽  
pp. 3923-3931
Author(s):  
Ming-Qing Yang ◽  
He-Ping Xie ◽  
Ming-Zhong Gao ◽  
Zhi-Qiang He ◽  
Cong Li ◽  
...  
Keyword(s):  
Temperature Field ◽  
Stress Field ◽  
Coal Mining ◽  
Coal Mine ◽  
Temperature Fields ◽  
Seepage Field ◽  
Element Analysis ◽  
Safety Control ◽  
Working Face ◽  
Gas Seepage

The study of gas seepage under the condition of multifield coupling has always been an important topic in coal mining. Based on the theory of multifield coupling and the research method of numerical simulation, the influences of the stress and temperature fields on the seepage field under the conditions of deep coal mining are studied. With the example of the J15-31030 deep working face from mine No. 12 in the Pingdingshan Coal Mine, modeling and finite element analysis are carried out. The influences of the mining stress field and temperature field on the gas seepage field are preliminarily revealed. The results show that the closer to the working face, the greater the velocity of the seepage field is, and the greater the gradient of velocity change. There is a clear negative correlation between the mining stress field and the permeability of the seepage field. The larger the excavation length is, the greater the change gradient of the rock permeability near the working face is. The temperature field has a significant impact on the adsorbed gas in the seepage field. These research results provide the corresponding basis for the safety control and effective mining of coal mine gas.

scholarly journals Study on the Stability of a Transition Section from Soft to Hard Surrounding Rock Based on the Solid-Fluid Coupling Effect

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Qizhi Hu ◽  
Yixin Tang ◽  
Zhigang Ding
Keyword(s):  
Stress Field ◽  
Displacement Field ◽  
Coupling Effect ◽  
Surrounding Rock ◽  
Guizhou Province ◽  
Seepage Field ◽  
Support Structure ◽  
Transition Section ◽  
Design Values ◽  
The Stability

To study the stability of a transition section of a tunnel from soft to hard surrounding rock under seepage conditions, FLAC3D software was used to numerically simulate the transition section of the Laomushan Tunnel from the Shiqian to Yuping (Dalong) Expressways in Guizhou Province, China, and to explore different working conditions. The characterization of the tunnel seepage field, stress field, and displacement field and the analysis of the force of the primary lining support structure describe the influence of the seepage field on the stress field distribution and displacement field changes. The reliability of the calculation results is verified by comparison with displacement measurements collected during field monitoring. The design values of the primary support structure parameters of the transition section from soft to hard surrounding rock of the Laomushan Tunnel basically met the strength requirements. The research results provide references for the design and construction of similar projects.

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