4 publications
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Published Subscription
Estimation of Burden Rock Movement using High Speed Videography: Case Study of A Limestone MineBy V. R. Sastry, B. Rajasekhar, G Raghu Chandra
Abstract: In an opencast mine involving hard rock/deposit excavation, blasting becomes a very important activity. Effective usage of explosive energy to fragment and displace the hard strata results in considerable savings. However, the occurrence of blasts in mines is so rapid that the naked eye cannot detect the process. High speed videography can provide the progress of blast in millisecond time scale needed to analyze the happenings in the blast. An …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 8, Issue 1, 2022 · pp. 14–25 Read article →
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Application of High Speed Videography and Digital Image Processing Software to Assess Performance of Blasts In Opencast Mines: A Case StudyBy Murali Naik T, V.R. Sastry, G Raghu Chandra, S. Kuili
Abstract: Rock mass can be fragmented by the process of blasting in which a known volume of the yield is obtained by using a calculated quantity of explosive. The explosive selected for blasting depends on factors like rock mass parameters, blasting economics and blast design. Assessment of the performance of a given blast is essential in the larger economics of the mining project. A study was conducted to know the blast …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 3, Issue 2, 2017 · pp. 1–9 Read article →
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Under Water Blasting for Rock Dredging & Protection of Structures: A Case StudyBy V. Rama Sastry, G Raghu Chandra, C. Karthik
Abstract: Rock dredging in ports involves under water blasting for the pretreatment of hard sea bed. A rock dredging project covering an area of about 257,058m2 involving 400,000 cu.m of hard Khondalite rock mass was taken up in a port in the east coast of Southern India, for deepening of Turning Circle and Inner Harbour Channel. Pre-blast survey was carried out to assess type and condition of various structures standing on …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 2, Issue 1, 2016 · pp. 31–38 Read article →
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Application of High-Speed Videography in Assessing the Performance of BlastsBy Vedala Rama Sastry, G Raghu Chandra, N Adithya, S A Saiprasad
Abstract: Abstract Blasting can be considered as the most crucial process in an opencast mine. It is therefore important for mining engineers to understand the effect of geological discontinuities and blast design parameters on the results of blasting. Bench height and burden are very important parameters affecting stiffness of bench. Joints alter the results of blasting, by making explosive energy utilization ineffective. Modern tools like high-speed videography reveal many aspects of …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 1, Issue 2, 2015 · pp. 32–46 Read article →