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Experimental and Numerical Study on the Thermo-Hydrological Coupling of Fractured Rocks

Author: TianLuLu
Tutor: LiTao
School: Beijing Jiaotong University
Course: Geotechnical Engineering
Keywords: Fractured rock Temperature field Seepage Field Coupling Test Numerical Analysis
CLC: TU452
Type: Master's thesis
Year: 2010
Downloads: 181
Quote: 0
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Abstract


In this paper, the deep geological disposal of high level radioactive waste research background , fractured rock under the hot water coupling characteristics of laboratory experiments and numerical simulation . Its main tasks are : ( 1 ) large-scale fractured rock model . Using Gansu Beishan 18 granite taken from the fractured rock mass model contains no filling fissures uniform distribution of the two groups in the horizontal and vertical directions . The test conditions for the vertical flow and right borders heated. A group of hot -water coupling test results obtained from rock fracture characteristics of hydraulic parameters , as well as the temperature distribution within the rock mass under different time and a different heat source temperature . (2 ) indoor model test , FLAC software simulation in fractured rock hot - water coupling process heat conduction , convection , thermal diffusion and non-isothermal flow phenomenon . The comparison and analysis of indoor model test and numerical simulation results show that the results of the two is more consistent . The main conclusions of this study : ( 1 ) in the test model , the heat mainly through vertical cracks in the water by convection pass ; (2) thermal convection significantly affect the rock mass temperature distribution ; ( 3 ) of the rock mass temperature fissures in non-isothermal flow field distribution plays a dominant influence ; (4) seepage field limit the sphere of influence of the heat source boundary changes in fractured rock temperature field .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Rock ( rock ) mechanics and rock testing > Rock mechanical properties and stress theory
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