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[1K0209-19-05] [Student presentation: Master’s course] The influence of different distribution-based strength heterogeneity on the properties of high-temperature rocks (岩石の強度不均質性が高温条件下の岩石破壊挙動に及ぼす影響)
司会：濵中晃弘 (九州大学)，玉村修司 (幌延地圏環境研究所)
Keywords:Strength heterogeneity, geothermal energy, Distinct element method
Abstract
As the global population continues to grow, the electricity demand is increasing sharply. On this behalf, geothermal energy has become one of the most promising renewable energy resources because of its huge reserves. For highly efficient development and production of geothermal energy, mechanical behavior of rock mass at high temperatures is an important factor. As indicated by previous scholars, strength heterogeneity of rock mass has large influence on the failure behavior. However, the effect of the heterogeneity on the mechanical behavior of rock under high temperature still remains as unsolved issues. Therefore, additional studies related to the mechanical behavior including failure are further required.
To better utilize the geothermal resources stored in high-temperature rocks, we simulate failure behavior of rock under high temperature with different strength distributions using the distinct element method (DEM). In DEM simulation, the bond strength is distributed by the normal and Weibull distribution. As the results, the strength heterogeneity has also large influence on the failure behavior of rock although its effect decreases gradually with increasing temperature.
As the global population continues to grow, the electricity demand is increasing sharply. On this behalf, geothermal energy has become one of the most promising renewable energy resources because of its huge reserves. For highly efficient development and production of geothermal energy, mechanical behavior of rock mass at high temperatures is an important factor. As indicated by previous scholars, strength heterogeneity of rock mass has large influence on the failure behavior. However, the effect of the heterogeneity on the mechanical behavior of rock under high temperature still remains as unsolved issues. Therefore, additional studies related to the mechanical behavior including failure are further required.
To better utilize the geothermal resources stored in high-temperature rocks, we simulate failure behavior of rock under high temperature with different strength distributions using the distinct element method (DEM). In DEM simulation, the bond strength is distributed by the normal and Weibull distribution. As the results, the strength heterogeneity has also large influence on the failure behavior of rock although its effect decreases gradually with increasing temperature.
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