This thesis investigates in detail the stress memory of hard rocks under uniaxial compressive conditions as a time-saving and inexpensive alternative to traditional in-situ stress measurement techniques. Extensive laboratory experiments are carried out to assess the influence of parameters such as transducer/amplifier frequency response, signal definition parameters, stress rate, strain rate, specimen size, stress level, delay time, temperature, water content, confining pressure, and directional loading on the Kaiser Effect of Stanstead granite and other rock types. Based on these findings and a new data processing techniques developed for estimating the previous stress level, a testing procedure is suggested and used to determine in-situ stresses from core samples with respect to their drilling orientations. In two case studies, the estimated stresses using the Kaiser Effect phenomenon are in good agreement with values obtained from conventional techniques while in the third study, no stress value was obtained due to the inability of the rock type to generate acoustic emissions. The results of this investigation show that the Kaiser Effect could become an economical method of stress measurement in hard and isotropic rock types.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.41156 |
| Date | January 1993 |
| Creators | Momayezzadeh, Mohammed |
| Contributors | Hassani, F. P. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Mining and Metallurgical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001337630, proquestno: NN87942, Theses scanned by UMI/ProQuest. |
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