Calculation Model and Decoupling Coefficient Sensitivity Study of Periphery Hole for Eccentric Decoupled Charge in Highway Tunnels

On the basis of the eccentric decoupled charge form on site and borehole concentric decoupled computational theory, the calculation model of eccentric decoupling charge would be established in the present study. The calculation model takes into account the influence factors such as damage to the surrounding rock, air, and water decoupled media. Besides, based on the proposed calculation model, blasting effect of a small-diameter EJ-102 emulsion explosive is calculated by using ANSYS LS-DYNA. The influence of decoupling coefficient, different rock grade, and different RQD value on blasting effect is obtained by sensitivity analysis of the simulated parameters. Then the calculated results are compared with the empirical results. The blasting parameters of fractured rock mass are also optimized by numerical simulation.

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Study on Seepage Field of Artificial Water Curtains for Underground Petroleum Storage Caverns in Fractured Rock Mass

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.1666 ◽

2013 ◽

Vol 353-356 ◽

pp. 1666-1670

Author(s):

Yun Peng Zhang ◽

Song Yu ◽

Wei Shen Zhu

Keyword(s):

Rock Mass ◽

Fractured Rock ◽

Distinct Element ◽

Water Pressure ◽

Underground Water ◽

Calculation Model ◽

Fractured Rock Mass ◽

Water Curtain ◽

Underground Caverns ◽

Water Seal

Based on joint statistics from the in-situ survey, using numerical simulation technique of joint network (Monte-Carlo method), the calculation model of fractured rock mass is generated. Underground seepage discharge filed in fractured rock mass surrounding storage caverns is analyzed by using distinct element method. The result of simulation has shown good agreement with surveying data. Two cases have been simulated that is water curtains is installed and is not installed. Water pressure distributions in joints are investigated in these two cases. It is shown that in the case without water curtain the groundwater in joints which locate the upper of underground caverns is drained out and water sealed conditions is completely unrealized. When water curtain pressure is set at 0.3MPa, can underground water seal the storage caverns.

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The effects of hydro-mechanical coupling on hydraulic properties of fractured rock mass in unidirectional and radial flow configurations

Geomechanics and Geophysics for Geo-Energy and Geo-Resources ◽

10.1007/s40948-021-00286-x ◽

2021 ◽

Vol 7 (3) ◽

Author(s):

Wei Li ◽

Zhechao Wang ◽

Liping Qiao ◽

Jie Liu ◽

Jinjin Yang

Keyword(s):

Rock Mass ◽

Hydraulic Properties ◽

Radial Flow ◽

Fractured Rock ◽

Fractured Rock Mass ◽

Mechanical Coupling ◽

Flow Configurations

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A fracture aperture dependent thermal-cohesive coupled model for modelling thermal conduction in fractured rock mass

Computers and Geotechnics ◽

10.1016/j.compgeo.2019.103108 ◽

2019 ◽

Vol 114 ◽

pp. 103108 ◽

Cited By ~ 3

Author(s):

Zhijun Wu ◽

Yuan Zhou ◽

Lifeng Fan

Keyword(s):

Rock Mass ◽

Thermal Conduction ◽

Fractured Rock ◽

Coupled Model ◽

Fracture Aperture ◽

Fractured Rock Mass

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The Research on Macro Charged Jet Phenomenon and its Orderly Collection

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.121-126.1156 ◽

2011 ◽

Vol 121-126 ◽

pp. 1156-1159

Author(s):

Yuan Yuan Liu ◽

Qing Wei Li ◽

Qing Xi Hu ◽

Chang Juan Jing ◽

Qiang Gao Wang

Keyword(s):

Rapid Prototyping ◽

Influence Factors ◽

Small Diameter ◽

Rotating Disk ◽

Linear Motion ◽

Injection Speed ◽

Collection Device ◽

Forming Precision

Macro charged jet molding combines with Rapid Prototyping and electrospinning together, it solved the problem of insufficient forming precision with RP molding and the difficulty of collection with electrospinning which caused by highly injection speed and small diameter. This article talks about Macro charged jet phenomena of PEO solution and its influence factors through experiment, detected diameter of the shoot fluid by using microscope, measured micro-injection speed by using the rotating disk with linear motion collection device, achieved orderly collection of Macro charged jet with different diameter and injection speed.

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