Paswan, Ranjit Kumar and Roy, M.P and Sawmliana, C. (2017) Flattening of hill by blasting in densely populated area for construction of an international Airport at Navi Mumbai, India. International Journal of Blasting and Fragmentation,, 11 (2). pp. 107-118.

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Abstract

In civil construction work, where blasting is affianced for excavation, the overall cost effectiveness of the production operations is compatible with drilling and blasting parameters. The blasting operations usually ac-companied with its adverse effect such as blast induced ground vibration, noise/air overpressure, flyrocks, backbreaks etc. Optimization of blast design plays vital role to control the adverse effect of blasting for con-struction and mining industries particularly in sensitive/populated area. Blasting operation of rock mass in-volve the interactions of rock mass with explosives properties, blast geometry and the detonation timings. This paper deals with controlled blasting techniques used for flattening of Ulwe hill by blasting for construction of International airport at Navi Mumbai, India which was surrounded by the populated area and subsequently to determine optimum blast design parameters for blasting at the land development site to achieve desired frag-mentation level i.e. 300 mm to 700 mm for preparation of stable runway foundation with minimum vibration level. Altogether, eighty-five blasts were conducted at different locations/packages of the Navi Mumbai In-ternational Airport (NMIA) construction site in order to flatten the Ulwe hill height from 92 mRL to 8 mRL. In total, 194 blast induced ground vibration data were recorded and analysed, from 85 blasts conducted at different locations/packages within the periphery of NMIA land development site. The study involved design-ing, planning and supervision of the total drilling and blasting operations, suggestions/modifications in blast design parameters, monitoring of blast-induced ground vibrations, noise/air overpressure, quality of explosives and its accessories were tested in regular process to achieve the desired objectives of the project. Rock frag-mentation analyses were carried out for each blast using photo-analysis system and subsequently blast designs were modified to get desired fragment size for land development work. The sequence of detonation, rock movement and stemming ejection during the trial blasts were recorded in each blast.

Item Type:	Article
Uncontrolled Keywords:	Drilling and Blasting Control blasting Blast design parameters Rock fragementsation
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	03 Nov 2022 10:39
Last Modified:	03 Nov 2022 10:39
URI:	http://cimfr.csircentral.net/id/eprint/2549

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