Modification of the RHT model for enhanced tensile response predictions of geologic materials

Tawadrous, A. S.; Glenville, D.S. Preece J.P.

doi:10.1201/b13759-44

Cited by 2 publications

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“…Spathis (2010) developed a number of alternative and complementary methods for obtaining a 3D solution. More recently Yang and Ray (2012) describe some data obtained in the first blasting field test using the 3D calculation method based on inverting estimates of displacement gradients to obtain the strain. The calculation method has been integrated into vibration analysis software by Ody and Spathis (2012), and is used here to analyse blast induced strain at the top of a coal mine highwall during 2012.…”

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“…For completeness, and in order to explain one method of calculating the strains from measured vibrations and the derived displacement gradients, a recap of the previous work is given. A fuller and accessible https://papers.acg.uwa.edu.au/p/1308_94_Henley/ exposition is given in Yang and Ray (2012) for 3D strain although we follow the unpublished work of Spathis (2010) and Ody and Spathis (2012) and here focus on a 2D analysis.…”

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“…The approach above is used at each time step of the timesynchronised vibration recordings. The equations for a 3D analysis are entirely analogous to those above (Yang and Ray, 2012). Of course, the data records may be in terms of particle velocity and it is necessary to transform these to particle displacements; this is done simply by integration and careful filtering as needed by the data quality.…”

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Measurements of dynamic surface strains induced by blasting near a highwall of a coal mine – a preliminary assessment

Henley¹,

Spathis²

2013

Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering

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Five production blasts at a coal mine were monitored at the top of the highwall using multiple vibration monitors from which the two dimensional transient surface strains were inferred using a novel analysis method. The rock type at the top of the highwall was semi-consolidated sediments typical of natural surface cover in central Queensland coal mines. The monitors were located between 81 and 280 metres from the production blasts, and approximately 10 m from the highwall crest. Vibration levels recorded were between 50 and 226 mm/s, while maximum tensile principal strains were between 123 and 542 microstrain. No obvious surface cracks were noted at the monitoring location.

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