溶浸–应力耦合作用下钙芒硝盐岩蠕变特性研究

doi:10.13722/j.cnki.jrme.2016.0827

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Abstract To investigate the creep properties of in-situ glauberite salt rock during the process of solution mining，the mutifunctional rock testing machine was used to conduct the tri-axial creep tests under the confining pressure of 4 MPa，the axial pressure of 5 MPa and the infiltration pressure of 3，2 and 1 MPa，respectively. To simulate the processes of solution mining，the creep process of glauberite salt rock was divided into four stages including the creep stage of hydraulic connection(CSHC)，the creep stage with pore water pressure(CSPWP)，the creep stage after drainage (CSAD) and the creep stage under axial pressure of 20 MPa(CSAP). The creep behaviors of four stages were compared. The results show that the hydraulic connection time for galuberite salt rock increases with decreasing infiltration pressure. At CSHC and CSPWP，continual dissolution of the minerals and the effective stress have signifacant effect on the creep deformations of specimens. The deformations of glauberite salt rock at CSAD and CSAP are dominated by the loading history of dissolution and the softening degree of mechanical properties of solid skeleton. Finally，the generalized Kelvin model was used to fit the creep curves at different creep stages，and it can describe the triaxial creep behavior of glauberite salt rock under coupled effect of dissolution and infiltration pressure.

Key words： rock mechanics glauberite salt rock creep dissolution effect

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	Articles by authors
	LIANG Weiguo1
	2
	CAO Mengtao1
	2
	YANG Xiaoqin1
	2
	ZHANG Chuanda1
	2
	XU Suguo1
	2

Cite this article:

LIANG Weiguo1,2,CAO Mengtao1, et al. Experimental study on creep of glauberite salt rock under coupled compression and dissolution[J]. , 2016, 35(12): 2461-2470.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0827 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/I12/2461

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