Effect of some rock mass properties on blasting-induced ground vibration wave characteristics

Abstract Ground vibration is the natural result of the blasting process. Many empirical formulae and methodologies including analysis of travel path effects have been developed. The scaled distance, which is the most popular approach for the calculation of the attenuation of particle velocity in the ground, has led to significant advances in the prediction of particle velocity when both explosive charge and distance vary. However, this approach does not consider the effect of ground anisotropy and existence of structural geological features on ground vibration. Therefore, in this study, the effects of these rock mass properties on types, amplitudes, and frequencies of ground vibration waves at four surface mines are examined. The results, which were implemented at Kangal coal mine, Bastas quarry and Kíbrís quarry, provided guidance for the extensive study at Orhaneli surface coal mine. As a result of the study, the authors came to the conclusion that vibration amplitudes change depending on the ground on which sensors were deployed and the conditions depending on whether measurements were done near major structural geological features. It was determined that the vibration amplitudes, measured at equal distances from the source but in different directions, change because of the propagation velocity anisotropy. Besides the change of wave type due to the kind of ground at the measurement location, it was determined that vibration anomolies were due to structural features.
Keywords: Blast vibration, Seismic wave, Wave propagation, Vibration measurement.
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Publication: CIM Bulletin
Issue: 1079
Volume: 97
Year: 2004
Text
Publication: CIM Bulletin
Author(s): A. Basdag, Hidd, Bahrain and A.I. Arol
Issue: 1079
Volume: 97
Year: 2004
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Summary: This memorandum discusses a potential trigger mechanism for a toppling failure in rock slopes. What is proposed here is not a general case for all toppling failures. It is instead a postulated driving mechanism for slopes meeting specific inherent geometric and geologic conditions. That having been said, these conditions appear to be met in many toppling situations. As the initial trigger phase of the proposed toppling mechanism is easily analyzed, this model may be of use to other slope...
Publication: CIM Bulletin
Author(s): J.I. Mathis
Issue: 1079
Volume: 97
Year: 2004
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Summary: The mining sequence at Noranda’s Bell-Allard mine calls for two mining fronts retreating toward a central pillar known as the Retreat Zone between pyramids A and C. It is clear from numerical modelling and rock mass characterization that the induced stress level in the pillar will exceed the rock mass capacity. A mining plan was developed including the re-dimensioning of stopes in the Retreat Zone, additional ground support and instrumentation in order to ensure the safety of the workforce...
Publication: CIM Bulletin
Author(s): V. Falmagne, G. Gagnon, D. Ouellet, B. Simser
Keywords: Retreat Zone, Bell-Allard mine, Mining strategy, Stope.
Issue: 1079
Volume: 97
Year: 2004
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Summary: This paper describes a sudden spill of waste rock used for backfilling from a waste pass at an underground mine in Canada, thus causing a major failure/accident. The mine operator immediately launched a detailed investigation to understand the causes of this accident and develop procedures to prevent any recurrence of such events in the future. The authors from McGill University were invited to collaborate with the engineers at the mine to examine this accident. The events leading to the...
Publication: CIM Bulletin
Author(s): F. Hassani, J. Ouellet, P. Gauthier, K. Moozar
Keywords: Liquefaction, Fill raise, Bousquet Complex, Case study.
Issue: 1079
Volume: 97
Year: 2004
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Summary: A research effort has been undertaken, under Workplace Safety and Insurance Board of Ontario (WSIB) sponsorship, to characterize the support capabilities of conventional and innovative spray-on lining materials for mitigating dynamic failure effects created by simulated rockbursts. Conventional spray support media, such as shotcrete and fibrecrete linings, and a variety of new spray-on lining materials [thin, spray-on liners (TSLs)], typically polymer-type thin coatings, were subjected to...
Publication: CIM Bulletin
Author(s): J.F. Archibald, P.D. Katsabanis
Keywords: Blast damage mitigation, Spray-on linings, Field testing.
Issue: 1079
Volume: 97
Year: 2004
Text
Summary: Geostatistical conditional simulations are becoming increasingly popular as tools that provide models of uncertainty at different stages of a mining project. They have been used as grade control tools in daily operations to assess the uncertainty of mineable reserves at the project’s feasibility stage, and to assess mineralization potential in certain settings. Other applications include assessment of recoverable reserves, resource and reserve classification, and drill hole spacing optimizati...
Publication: CIM Bulletin
Author(s): M.E. Rossi, J.E. Camacho
Keywords: Geostatistical conditional simulation, Resource classification, Probability intervals, Open pit, Underground mine.
Issue: 1079
Volume: 97
Year: 2004
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