流变扰动条件下敏感邻域内岩体微观损伤试验研究

doi:10.13722/j.cnki.jrme.2023.0635

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Abstract The rheological rock mass in the sensitive neighborhood? is prone to deformation and failure under the action of disturbance load. In order to establish the criterion of rheological rock mass entering the sensitive neighborhood from the perspective of micro-damage，the red sandstone is taken as the research object，and the RRTS-IV rock rheological disturbance effect test system is used to carry out rheological disturbance tests on rheological rock mass under different axial static load pressures. The test results show that：(1) When the rheological rock mass is under high axial static load pressure，the longitudinal cumulative disturbance strain curve will experience three stages of deceleration growth，stable growth and rapid growth，and the greater the axial static load pressure，the more prominent the rapid growth stage. (2) By analyzing the relationship between the longitudinal disturbance strain rate and the axial static load pressure，the strain response characteristics of the rheological rock mass under different axial static load pressures for dynamic disturbance are explored，and different disturbance sensitive areas are divided. (3) Under the action of dynamic disturbance，the pore expansion and crack germination of the rheological rock mass in the non-sensitive area will be restrained to a certain extent. (4) When the rheological rock mass enters the weak sensitive area and the strong sensitive area from the transition zone，the dynamic disturbance can greatly promote the initiation of micro-cracks and the expansion of original cracks in the rock mass，and the closer the dynamic disturbance is to the strong sensitive area，the more significant the increase in the number of pores.

Key words： rock mechanics rheological disturbance test longitudinal strain curve disturbance strain rate sensitive area pore change

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	Articles by authors
	WANG Bo1
	TIAN Zhiyin1
	MA Shiji1
	REN Yongzheng1
	SUN Hongxu1
	GAO Xiangyu1
	WANG Jun2
	HUANG Wanpeng3

Cite this article:

WANG Bo1,TIAN Zhiyin1,MA Shiji1, et al. Experimental study on micro-damage of rock mass in sensitive neighborhood under rheological disturbance[J]. , 2024, 43(S2): 3820-3831.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0635 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/IS2/3820

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