地应力下柱面应力波在节理岩体中传播规律研究

doi:10.13722/j.cnki.jrme.2017.1013

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Abstract

Considering the effect of in-situ stress on the physical and geometrical attenuation of cylindrical stress wave propagation，and the interaction between cylindrical stress wave and a joint，the propagation equation of cylindrical wave in jointed rock mass under in-situ stress is derived. Meanwhile，a model test was carried out to study the propagation and attenuation law of cylindrical stress wave in the intact and jointed rock mass under different in-situ stresses，the measured and theoretical results are compared and analyzed. The results show the physical attenuation of cylindrical wave in the intact rock decreased firstly then increased with the increase of confining pressure，when the lateral pressure coefficient changes，the variation of the physical attenuation is related to the magnitude of the differential stress. The transmission coefficient of cylindrical wave in jointed rock mass is related to the angle of joints and the attenuation in joints and rock，the transmission coefficient decreased with the increase of the joint angle without confining pressure，and the variation law of transmission coefficient is contrary under confining pressure. The transmission coefficient increased firstly then decreased with the increase of confining pressure and the lateral pressure coefficient. The theoretical and measured transmission coefficients under different confining pressures are relatively close，the validity of derived propagation equation is verified.

Key words： rock mechanics cylindrical stress wave jointed rock mass model test in-situ stress propagation law

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	Articles by authors
	LI Xinping1
	2
	DONG Qian2
	LIU Tingting1
	2
	HUANG Junhong2

Cite this article:

LI Xinping1,2,DONG Qian2, et al. Research on propagation law of cylindrical stress wave in jointed rock mass under in-situ stress[J]. , 2018, 37(S1): 3121-3131.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1013 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3121

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