Numerical simulation of formation mechanism of unloading joints in granitic pluton
作者机构：College of Earth SciencesJilin UniversityChangchun 130061China Key Laboratory of Mineral Resources Evaluation in Northeast AsiaMinistry of Natural ResourcesChangchun 130061China
出 版 物：《Global Geology》 (世界地质（英文版）)
年 卷 期：2024年第27卷第1期
页 面：35-42页
学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程]
主 题：granites rockburst underloading joints numerical modeling
摘 要：The Beishan pluton in Gansu of China was selected as the simulated *** simulation results indicate that the formation of unloading joints in granite is mainly influenced by the unloading rate of confin-ing *** the rates tested,the slowest unloading rate 0.025 MPa/s is found to be most conducive to the development of unloading ***,a slower unloading rate is favourable for the occurrence of unloading joints.A series of simulations with varying initial depths of uplift ranging from 900 m to 200 m were *** results confirm that when the specimen rises to a depth of 550-500 m,the unloading joints begin to *** uplift from a depth of 700-500 m,with variations in both vertical and lateral un-loading rates,was *** generation of unloading joints exhibits a negative correlation with vertical unloading and no correlation with lateral unloading,indicating that the unloading joints are mainly controlled by the unloading of vertical *** the simulation process,the vertical joints exhibit irregular and unrealistic regularity,suggesting a more complex formation mechanism than that of the unloading joints.
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