Roy , Pajush Pal and Sawmliana , C. and Singh , Rakesh Kumar (2020) Protecting structural damage and human annoyance during blasting in sensitive hilly terrain. Minetech, 41 (1). ISSN 0970-7204

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Abstract

The Paper describes the controlled blasting operations in close-proximity of residential houses on hill slopes at the road construction site of kaladan multi-modal Transit Transport Project of Mizoram state of India. Human response and sensitivity were predominantly considered while fixing the sfe level of ground vibration in contrary to the prescribed level suggested by the regulatory agency in India i.e. Directorate General of Mines Safety (DGMS ). Experimental blast were conducted using jackhammer drill hole (32 mm diameter) of 1.5 m (5 ft) depth and 25mm diameter cartridge explosive combined with short-delay electric detonators. Ground vibration level of 1.85mm/s. was even found to be very unpleasant and non-acceptable to the inhabitants. To avoid complaints and inconvenience, controlled blast design parameters were established with limited number of holes and maximum charge per delay in each blasting round so as to confine the ground vibration level within 1mm/s. which was acceptable to the residents.

Item Type:	Article
Uncontrolled Keywords:	Controlled blasting: ground vibration:. Structural damage: Human response: Air overpressure; Dominanat frequency: Fast Fourier Transform
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	28 Dec 2020 08:40
Last Modified:	28 Dec 2020 08:40
URI:	http://cimfr.csircentral.net/id/eprint/2290

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