充填节理岩石累积损伤动力压缩特性试验研究

doi:10.13722/j.cnki.jrme.2020.0310

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Abstract The dynamic mechanical behaviour of filled rock joints and its influence on stress wave propagation are important bases for dynamic response analysis and safety evaluation of rock mass engineering. In view of the lack of research on the cumulative damage and the strength weakening of filled joints by dynamic loading disturbance，series of tests are carried out on the artificial filled jointed rock samples to study the damage evolution rule under the cumulative impacts and its influences on the dynamic mechanical properties in this present paper. A simply equipped drop hammer impact device is used to carry out multiple pre-impact tests on the jointed rock samples，then the cumulative damage law is analyzed through the change of the wave velocity. On this basis，the dynamic impact tests of SHPB are carried out on filled jointed rock samples after different numbers of pre-impact. Based on the test results，the influence of cumulative damage on the dynamic mechanical properties of the filled jointed rock is analyzed from the aspects of strength deformation characteristics，wave propagation characteristics and energy dissipation.

Key words： rock mechanics filled joints cumulative damage dynamic compression mechanical properties joint thickness

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	Articles by authors
	CHAI Shaobo1
	2
	WANG Hao1
	JING Yanlin1
	JIA Neng1

Cite this article:

CHAI Shaobo1,2,WANG Hao1, et al. Experimental study on dynamic compression characteristics of rock with filled joints after cumulative damage[J]. , 2020, 39(10): 2025-2037.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0310 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I10/2025

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