基于Burgers模型的软岩流变相似材料的研究

doi:10.13722/j.cnki.jrme.2017.1082

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Abstract A new rheological similar material of soft rock(IBSRO) was developed with the iron ore powder，barites powder and sand as aggregate，the solution of rosin and alcohol as glue，and the hydraulic oil as viscous agent. The effects of components of the similar material on the elastic-plastic parameters and Burger′s model parameters were investigated through orthogonal tests. The test results indicate that the uniaxial compressive strength(?c)，elasticity modulus(E)，Poisson?s ratio(?)，cohesion(c)，viscoelasticity modulus(E1，E2) and coefficient of viscosity(?1，?2) are all affected mainly by the rosin concentration and the content of hydraulic oil. The greater the rosin concentration and the smaller hydraulic oil content，the larger the values of ?c，E，c，E1，E2，?1 and ?2 and the smaller the values of μ. The internal friction angle(?) is mainly affected by the(iron ore powder + barite powder)/ aggregates and the content of hydraulic oil，and the larger the two factors，the smaller the value of ?. The initial creep rate，stable creep rate，primary creep time and rheological strain ratio all decrease with the rosin concentration，and increase with the hydraulic oil content. The range of elastic-plastic and Burger?s model parameters of the similar material corresponds to that of soft rock，which can be used to simulate the instantaneous and rheological properties of soft rock. Finally，the method of determining the ratio of the material components based the multivariate linear regression analysis is presented and is verified in the rheological model test on the shield shaft of soft rock.

Key words： rock mechanics soft rock rheology similar material orthogonal test model test

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	Articles by authors
	CHU Zhaofei
	LIU Baoguo
	SUN Jinglai
	SHEN Jun
	SONG Yu
	LI Tie

Cite this article:

CHU Zhaofei,LIU Baoguo,SUN Jinglai, et al. Research on rheological similar material of soft rock based on Burgers model[J]. , 2018, 37(5): 1185-1198.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1082 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I5/1185

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