Creep Properties of Altered Rock Subjected to Water Influx-Lost Cycles

• Published in: Geotechnical and geological engineering Vol. 39; no. 7; pp. 5085 - 5094
• Main Authors: Chen, Xuxin, Qin, Zhe, Fu, Houli
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.10.2021; Springer Nature B.V
• Subjects: Axial loads; Civil Engineering; Cold flow; Compressive strength; Creep tests; Cycles; Deformation; Disasters; Earth and Environmental Science; Earth Sciences; Exponential functions; Geotechnical Engineering & Applied Earth Sciences; Granite; Hydrogeology; Load; Mine tailings; Original Paper; Ponds; Properties; Rheology; Rocks; Slope stability; Solifluction; Tailings; Terrestrial Pollution; Waste Management/Waste Technology; Water level fluctuations; Water levels; Long-term strength; Creep strain; Water influx-lost cycles; Creep properties of rock
• ISSN: 0960-3182; 1573-1529
• DOI: 10.1007/s10706-021-01814-y

Creep properties of altered granite were changed due to water level rise and fall in the tailings ponds. In this paper, the effects of water influx-lost cycles on the creep properties were tested. The axial load was applied with the 30%, 40%, 60%, 75% and 100% of the triaxial compressive strength, the rock creep test results showed that: (1) Significant creep effects of altered granite subjected to water influx-lost cycles, the creep stages were included decay creep stage, steady creep stage, and accelerated creep stage. It was found that the creep strain gradually increases with of the number of water influx-lost cycles increases, and the ratio of the maximum creep strain to total strain can reach 10.42%. (2) The degradation of long-term strength of altered granite subjected to water influx-lost cycles was studied, the long-term strength was decreased from 32.13 to 5.46 MPa. The relationship between the long-term strength and number of cycles was indicated by an exponential function. It was found that water influx-lost cycles have adversely effects on the long-term stability of the tailing pond slope, and the research results are of great significance to the prevention of slope engineering disasters.