Abstract
A number of factors influence the generation, propagation and intensity of ground vibrations. However, there are conflicting opinions with regard to the influence of the blast size on the intensity of ground vibrations. This paper discusses the experiments conducted in an opencast coal mine in India and a simulation study carried out to establish the influence of total charge in a blast on the intensity of ground vibrations. Studies clearly indicate that the total explosive charge in a blast has insignificant influence on the intensity of ground vibrations for distances between 100 m and 3000 m.
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Acknowledgements
Thanks are due to the Director, National Institute of Rock Mechanics (NIRM), India, for his technical discussions, guidance and providing the facilities to conduct research and for his permission to publish this paper. I am also thankful to Dr. G.R. Adhikari of the NIRM for his encouragement and to my colleagues Mr. A.I. Theresraj and Mr. R. Balachander who assisted in field measurements. Thanks are due to Dr. R. Venugopala Rao of the NIRM for his contributions during the numerical model study. I am also thankful to my PhD supervisor Professor V.R. Sastry, National Institute of Technology Karnataka, India. Last, but not the least, thanks are due to all the people who are directly or indirectly associated with this work.