The hydraulic conductivity of the fractures intersecting Cambrian sandstone rock masses, central Jordan

2001 ◽  
Vol 40 (8) ◽  
pp. 973-982 ◽  
Author(s):  
Ali El-Naqa
Keyword(s):  
Hydraulic Conductivity ◽  
Rock Masses ◽  
Central Jordan ◽  
Sandstone Rock

scholarly journals Analysis of Shear Characteristics of Deep, Anchored Rock Mass under Creep Fatigue Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Xiaofeng Li ◽  
Zhixiang Yin
Keyword(s):  
Rock Mass ◽  
Rock Strength ◽  
Low Frequency ◽  
Fatigue Loading ◽  
Load Level ◽  
Rock Masses ◽  
Sandstone Rock ◽  
Fatigue Model ◽  
Creep Fatigue ◽  
Marble Rock

To study the influence of earthquakes and engineering disturbances on the deformation of deeply buried rock masses, shear tests were carried out on anchored sandstone rock masses, anchored marble rock masses, and anchored granite rock masses under creep fatigue loading, and a new creep fatigue model was established to characterize the deformation characteristics of anchored rock masses under creep fatigue loading. The creep fatigue curves of different lithologies clearly show three stages: creep attenuation, steady-state creep, and accelerated creep. Fatigue loading can increase the creep of anchored specimens, and the lower the rock strength is, the higher the creep variable under fatigue loading is. However, for the same rock strength, with the increase in load level, the creep variable produced by creep fatigue load presents a linear downward trend. Considering the changes in the mechanical properties of the anchored rock mass under creep fatigue loading, the creep fatigue model of anchored rock masses is established by introducing a function of the fatigue shear modulus, and the accuracy and applicability of the model are verified by laboratory creep fatigue test data. The model provides a theoretical basis for the study of anchored rock mass support under low-frequency earthquakes or blasting loads.

Assessment of hydraulic conductivity of disturbed and undisturbed rock masses in Tunçbilek lignite basin, Turkey

2021 ◽  
Vol 14 (15) ◽  
Author(s):  
Hüseyin Karakuş ◽  
Zeynal Abiddin Erguler ◽  
İ. Göktay Ediz ◽  
Sunay Beyhan
Keyword(s):  
Hydraulic Conductivity ◽  
Rock Masses ◽  
Undisturbed Rock

scholarly journals Hydraulic Conductivity of Rock Masses Surrounding Water Curtain Boreholes for Underground Oil Storage Caverns

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4588
Author(s):  
Qi-Hua Zhang ◽  
Qing-Bing Liu ◽  
Ai-Jun Su ◽  
Yu-Jie Li ◽  
Yi-Hu Zhang
Keyword(s):  
Hydraulic Conductivity ◽  
Test Data ◽  
Flow Rate ◽  
Rock Fracture ◽  
Rock Masses ◽  
Surrounding Water ◽  
Water Curtain ◽  
Oil Storage ◽  
Natural Rock ◽  
The Impact

The assessment of the groundwater flow rate around the cavern periphery is a critical requirement for the design of underground water-sealed oil storage caverns and commonly made through seepage analysis, where a reasonable estimation of the hydraulic conductivity of the host rock is the key issue. However, it is a challenge to accurately determine the hydraulic conductivity of natural rock masses owing to their heterogeneous and anisotropic nature. The underground storage cavern project has a unique favorable condition in that there is a water curtain system that can provide considerable hydraulic test data for inferring hydraulic parameters; however, no well-established method has ever been proposed to exploit these data for characterizing heterogeneity in hydraulic conductivity. This study presents a new approach to evaluate the spatial variation of hydraulic conductivity using water curtain borehole data. This approach treats the peripheral region of each borehole as a homogenous unit with a particular equivalent permeability coefficient that can be back-calculated from the measured injection flow rate of the borehole using a numerically established empirical formula. Besides, the impact of curtain gallery drainage, occurring in the construction stage, on the seepage field was investigated while the effect of the rock fracture configuration on hydraulic conductivity assessment was examined. The proposed method enables robust and accurate mapping of heterogeneity in the hydraulic conductivity of host rocks and provides a new idea of effectively utilizing hydro-geological test data to derive the hydraulic conductivity of rock masses surrounding water-sealed storage caverns.

scholarly journals Experimental study on imaging hydraulic conductivity of rock masses based on elastic wave velocity dispersion

2009 ◽  
Vol 62 (3) ◽  
pp. 307-318 ◽  
Author(s):  
Kimitaka Yoshimura ◽  
Ken-ichi Ando ◽  
Susumu Sakashita ◽  
Patrick Bruines ◽  
Hirohumi Okumura ◽  
...  
Keyword(s):  
Experimental Study ◽  
Hydraulic Conductivity ◽  
Elastic Wave ◽  
Wave Velocity ◽  
Velocity Dispersion ◽  
Elastic Wave Velocity ◽  
Rock Masses
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