Rock mechanical aspects for cavern stability

2013 ◽  
pp. 151-156
Author(s):  
T Pilgerstorfer ◽  
H Wannenmacher ◽  
K Grossauer ◽  
A Stucki ◽  
B Schwegler
Keyword(s):  
Cavern Stability

Salt Cavern Stability Evaluation

2021 ◽  
pp. 1-22
Author(s):  
Xinhua Ma ◽  
Guosheng Ding ◽  
Zhide Wu ◽  
Lina Ran
Keyword(s):  
Stability Evaluation ◽  
Salt Cavern ◽  
Cavern Stability

Research on the Cavern Stability and Rock Fracture with Different Joint Groups

2012 ◽  
Vol 188 ◽  
pp. 96-100 ◽  
Author(s):  
Hai Ping Ma ◽  
Wei Shen Zhu ◽  
Song Yu ◽  
Jing Wang
Keyword(s):  
Rock Mass ◽  
Loading Condition ◽  
Fracture Process ◽  
Process Analysis ◽  
Rock Fracture ◽  
Rock Stability ◽  
Joint Rock Mass ◽  
Deformation Stress ◽  
Cavern Stability ◽  
Joint Rock

The numerical simulation using DDARF was carried out to analysis the rock samples with two and four cracks under uniaxial loading condition. Contrastive research was made about the fracture process analysis of rock mass with joints sets at the three different angles. The rock stability with difference of joint rock mass was compared when the lateral coefficient of initial stress varied. It is shown that distribution of joint groups will bring effects on rock surroundings in controlling deformation, stress status and stability.

The Stability Impact Study for Blasting near Underground Caverns

2012 ◽  
Vol 256-259 ◽  
pp. 1172-1176
Author(s):  
Cheng Man Sha ◽  
En De Wang ◽  
Jian Fei Fu ◽  
Gen Qun Hou ◽  
Tian Bao Zhang
Keyword(s):  
Damage Effect ◽  
Seismic Gap ◽  
Surface Cracks ◽  
Impact Study ◽  
Underground Cavern ◽  
Underground Caverns ◽  
Collapse Models ◽  
The Stability ◽  
Cavern Stability

Nowadays, the safety effection study of the surface explosion operations on underground cavern safety become more and more important along with engineering construction's development. In this paper, effection of open stope surface explosive operations on underlying gap cavern as an example on studying the effection of blasting shock on underground cavern stability with the method of field monitoring and numerical simulation.When the explosion source and seismic gap are almost in the same level, the longitudinal wave leads the role of damage effect. The most dangerous part of the mined-out area is the spandrel. The collapse models of mined-out area manifest are as follows, cracks appear on 45. Inclined top of surface in mined-out area, the spandrels appear broken, surface cracks expand further, broken parts of spandrel are aggravated, arch waist are in jog and the side collapse inward in the end.

scholarly journals A Numerical Study of Underground Cavern Stability by Geostress Characteristics

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Xiao-Jing Li ◽  
Li-Ge Wang ◽  
Wei-Min Yang
Keyword(s):  
Numerical Study ◽  
Pressure Coefficient ◽  
Side Wall ◽  
Surrounding Rock ◽  
High Mountain ◽  
Burial Depth ◽  
Underground Cavern ◽  
Rock Cavern ◽  
The Stability ◽  
Cavern Stability

The stability of underground cavities is of increasing importance considering the predominant cavity locations built up in high mountain and canyon environments. Such cavity locations are characterized by a high initial in situ stress, which results in brittle fracture and deformation of the surrounding rock during cavity construction. This paper presents a numerical study of underground cavern stability considering four factors, namely, mechanical property of surrounding rock, cavern burial depth, lateral pressure coefficient in horizontal direction, and the angle included between plant longitudinal axis and horizontal principal stress. Analytical methods including the key point displacement in side wall, plastic zone volume, and splitting fracture volume are used to characterize the stability of underground cavern. A modified formula to predict side wall displacement is proposed based on prior work, which is applicable to 3D computation model by taking horizontal geostress in two directions into account. Eventually, the optimal layout of underground cavern is put forward under different conditions of geostress field.

scholarly journals Fusion of Hydraulic Tomography and Displacement Back Analysis for Underground Cavern Stability Investigation

2018 ◽  
Vol 54 (11) ◽  
pp. 8632-8652 ◽  
Author(s):  
Xu Gao ◽  
Tian‐Chyi Jim Yeh ◽  
E‐Chuan Yan ◽  
Wen‐ke Wang ◽  
Jing‐Sen Cai ◽  
...  
Keyword(s):  
Back Analysis ◽  
Stability Investigation ◽  
Hydraulic Tomography ◽  
Underground Cavern ◽  
Displacement Back Analysis ◽  
Cavern Stability

Influences of Horizontal Initial Stress and Slope Angle on Stress Distribution in Mountains and Cavern Stability

2011 ◽  
Vol 90-93 ◽  
pp. 688-691
Author(s):  
Li Ge Wang ◽  
Wei Shen Zhu ◽  
Kui Zhou ◽  
Xiao Li Xin
Keyword(s):  
Stress Distribution ◽  
Initial Stress ◽  
Flat Surface ◽  
Slope Angle ◽  
Jointed Rock ◽  
Vertical Profiles ◽  
Mountain Area ◽  
Rock Stability ◽  
The Many ◽  
Cavern Stability

Inbetween the many factors, which will influence the distribution character of initial stress in a mountain, different angle of mountain slopes and horizontal geostress will have important effects on it. Therefore, stress distribution in mountains under different slope angles with considering different lateral coefficients of initial stress is studied using numerical method in here. In this paper, the initial geostress distribution of mountain at typical vertical profiles are studied in the gravity field, with the slope angles being 30°, 45° and 60°, respectively. After the calculation, it can be known that the actual initial vertical stresses may be 2-5 times of the gravitational stresses calculated by direct depth gh for some zones. Meanwhile, it reveals that different horizontal geostress has a momentous impact on it as well. Computation of damage-fracture model for jointed rock is adopted to analyze the rock stability of a cavern. Comparison of the rock stability excavated in a mountain area or under a flat surface is made also.

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