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

doi:10.36487/ACG_rep/1308_94_Henley

Authors: Henley, KN; Spathis, AT

DOI https://doi.org/10.36487/ACG_rep/1308_94_Henley

Cite As:
Henley, KN & Spathis, AT 2013, 'Measurements of dynamic surface strains induced by blasting near a highwall of a coal mine – a preliminary assessment', in PM Dight (ed.), Slope Stability 2013: Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Australian Centre for Geomechanics, Perth, pp. 1327-1334, https://doi.org/10.36487/ACG_rep/1308_94_Henley

Download citation as: ris bibtex endnote text Zotero

Abstract:
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.

References:

Blair, D.P. (1995) Soil-embedded detector mounts for seismic monitoring, Geophysics, Vol. 60 (1), pp. 120–133.

Cahill, J. and Lee, M. (2006) Ground control at Leinster Nickel Operations, in Proceedings International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, 3–6 April 2006, Cape Town, South Africa, The Southern African Institute of Mining and Metallurgy.

Fujii, Y., Kiyama, T. and Ishijima, Y. (1993) New failure criterion for rock, Shigen-to-Sozai, The Mining and Materials Processing Institute of Japan, ISSN:0916-1740, Vol. 109, No. 7, pp. 549−550 (in Japanese).

Henley, K. (2009) Vibration Site Law Analysis, Orica Internal report.

Kwasniewski, M. and Takahashi, M. (2010) Strain-based failure criteria for rocks: State of the art review and recent advances, in Proceedings EUROCK Rock Mechanics in Civil and Environmental Engineering, Z. Zhao, V. Labouise, J.P. Dudt and

J.F. Mathier (eds), 15–18 June 2010, Lausanne, Switzerland.

Little, M.J. (2006) Slope monitoring strategy at Prust Open Pit Operation, in Proceedings International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering, 3–6 April 2006, Cape Town, South Africa, The Southern African Institute of Mining and Metallurgy.

Naidu, P.S. (2009) Sensor Array Signal Processing (2nd Edition), CRC Press, Boca Raton, Florida, USA.

Ody, M.S. and Spathis, A.T. (2012) Software Implementation of the Calculation of Dynamic Strains and Rotations from Displacement Measurements, Orica Technical Report: Category B.

Sakurai, S. (1981) Direct strain evaluation technique in construction of underground openings, in Proceedings 22nd U.S. Symposium on Rock Mechanics, 29 June–2 July 1981, Cambridge, MA, pp. 278–282.

Sakurai, S., Kawashima, I. and Otani, T. (1995) A criterion for assessing the stability of tunnels, in Proceedings Safety and Environmental Issues in Rock Engineering, L. Ribeiro, E. Sousa and N.F. Grossmann (eds), ISRM International Symposium EUROCK ’93, 21–24 June 1993, Lisbon, Portugal, Vol. 2, Balkema, Rotterdam, pp. 969–973.

Spathis, A.T. (2010) The calculation of the dynamic strain tensor from particle displacement measurements, Orica Technical Report: Category B.

Stacey, T.R. (1981) A simple extension strain criterion for fracture of brittle rock, International Journal of Rock Mechanics and Mining Sciences, Abstract, Vol. 18, pp. 469–474.

Timoshenko, S.P. and Goodier, J.N. (1970) Theory of Elasticity, 3rd edition, McGraw-Hill, New York.

White, J.E. (1983) Underground Sound, Elsevier, Amsterdam, The Netherlands.

Yang, R. (2010) Method to calculate 3-D dynamic strain tensor from blast vibration monitoring, Orica Internal Technical Report.

Yang, R. and Ray, K. (2012) A Method to Determine the 3-D Dynamic Strain Tensor Based on Displacement Gradients from Blast Vibration and Field Test Results, Fragblast, Vol. 10, 24–29 November, New Delhi, India.

© Copyright 2024, Australian Centre for Geomechanics (ACG), The University of Western Australia. All rights reserved.
View copyright/legal information
Please direct any queries or error reports to repository-acg@uwa.edu.au