Abstract
Tensile strength sensitivity of thin spray-on liners to changes in environmental conditions
Highlights
Geotechnical hazards in underground mines are closely linked with rock-related accidents (Kuijpers et al, 2004; Potvin, Stacey, and Hadjigeorgiou, 2004; Szwedzicki, 2003)
It is to be noted that the tensile strengths obtained for TSL1 and TSL3 after 28 exposure days were lower than the respective values of 9.7 MPa and 9.75 MPa indicated by the manufacturers
In spite of the limited number of thin spray-on liner (TSL) tested, the results obtained from this research are considered to be very significant, since they serve as a warning to TSL users that performance determined from laboratory tests under ‘standard’ room conditions is most unlikely to be representative of performance in deep-level operations, where conditions will be hot and humid, and the ’real’ performance data must be taken into account for support design
Summary
Geotechnical hazards in underground mines are closely linked with rock-related accidents (Kuijpers et al, 2004; Potvin, Stacey, and Hadjigeorgiou, 2004; Szwedzicki, 2003). Significant efforts have been made to mitigate geotechnical risks in the past decades. Such efforts include the continual improvement of mining support systems that can retain and contain the rock mass. (Hoek, Kaiser, and Bawden, 2000). Called areal supports, are wire mesh, straps, mortar, shotcrete, etc. Another type of mining support that has emerged in the last few decades is a thin membrane for surface support called a thin spray-on liner (TSL)
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