Document Type
Article
Publication Date
3-26-2019
Department
Department of Civil, Environmental, and Geospatial Engineering
Abstract
The stability analysis of an abandoned underground gypsum mine requires the determination of the mine pillar's strength. This is especially important for flooded abandoned mines where the gypsum pillars become saturated and are subjected to dissolution after flooding. Further, mine pillars are subjected to blast vibrations that generate some level of macro- and micro-fracturing. Testing samples of gypsum must, therefore, simulate these conditions as close as possible. In this research, the strength of gypsum is investigated in an as-received saturated condition using uniaxial compressive strength (UCS), Brazilian tensile strength (BTS) and point load index (PLI) tests. The scale effect was investigated and new correlations were derived to describe the effect of sample size on both UCS and BTS under dry and saturated conditions. Effects of blasting on these parameters were observed and the importance of choosing the proper samples was discussed. Finally, correlations were derived for both compressive and tensile strengths under dry and saturated conditions from the PLI test results, which are commonly used as a simple substitute for the indirect determination of UCS and BTS.
Publication Title
Journal of Rock Mechanics and Geotechnical Engineering
Recommended Citation
Sadeghiamirshahidi, M.,
&
Vitton, S.
(2019).
Mechanical properties of Michigan Basin's gypsum before and after saturation.
Journal of Rock Mechanics and Geotechnical Engineering,
11(4), 739-748.
http://doi.org/10.1016/j.jrmge.2018.10.006
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/430
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
Copyright 2019 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. Article deposited here in compliance with publisher policies. Publisher's version of record: https://doi.org/10.1016/j.jrmge.2018.10.006