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- Title
海洋天然气水合物强度准则适用性分析.
- Authors
周云健; 何玉发; 胡乔波; 赵元哲
- Abstract
In order to analyze the applicability of the strength failure criteria of gas hydrates with different saturations under different confining pressures under constant triaxial compression, based on the Mohr-Coulomb, Mogi-Coulomb, Hoek-Brown, generalized HoekBrown and Drucker-Prager criteria, combined the deviator stress-strain curve of natural gas hydrate under low confining pressure was used to fit the strength of natural gas hydrate. The results show that the average error rate between the calculated values of the MogiCoulomb criterion and the Drucker-Prager strength criterion and the experimental value is less than 2%, and the correlation coefficient of the fitted curve is greater than 0. 99, indicating that these two strength criteria have high consistency with the experimental structure. Hoek-Brown criterion fitting curve correlation coefficient is less than 0. 95, which is not applicable under low confining pressure of natural gas hydrate. The research results can provide a theoretical reference for the research on the stability of natural gas hydrate wellbore and ensure the safety of hydrate mining.
- Publication
Science Technology & Engineering, 2022, Vol 22, Issue 26, p11372
- ISSN
1671-1815
- Publication type
Article