岩石节理法向变形的指数-双曲线组合模型研究
Study on composite exponential-hyperbolic normal deformation model of rock fractures
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摘要: 针对传统的岩石节理法向变形2参数的指数模型和BB模型的局限性,通过引入参数α,提出一个新的3参数模型——指数-双曲线组合模型.新模型弥补了指数模型在中应力水平条件下夸大dn,BB模型在中应力水平条件下dn偏小且向dmax逼近速度过慢的不足,利用花岗闪长岩的试验结果对新模型进行验证,其模拟效果优于BB模型与指数模型,验证了新模型的科学性和可行性.
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关键词:
- 岩石节理 /
- 法向变形 /
- 应力因子 /
- 指数-双曲线组合模型
Abstract: A parameter α was introduced into the new 3-parameter composite exponential-hyperbolic model on account of the defects of the conventional 2-parameter exponential model and BB model of the normal deformation of rock fractures.The new model got over the defects of the conventional models,i.e.exaggeration of dn under medium stress level by exponential model and contraction of dn with the low rate of approaching to dmax under medium stress level by BB model.The new model was validated by the testing data of grano diorite.And the validation showed that the simulation result from new model was superior to those from the BB model and exponential model,which provided a proof of feasibility and scientificity of the new model. -
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