Bhagat, Narayan K and Singh, M.M. and Rana, Aditya and Singh, P.K. (2020) Directional controlled blasting technique for excavation of unstable slopes along the Konkan Railway route. Mining Engineering Journal. , 37. pp. 833-850.

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Abstract

The paper presents an innovative directional controlled blasting (DCB) technique for excavating unstable slopes along the Konkan railway in India without disturbing the traffic. New empirical formulae for small geometry blasting to estimate burden and throw were developed. A unique sequence of firing and excavation with powder factor varying between 0.04 and 0.39 kg/m3, irrespective of the actual free face, was used for rock blasting. The process controlled the throw of blasted material over the track and resulted in a smooth and stable wall. The slope angle was changed from 80–82 to 45– 47 degrees, and possible wedge, planar and toppling failures were eliminated. No incident of rockfall and slope failure along these slopes has been observed after the stabilization.

Item Type:	Article
Uncontrolled Keywords:	Directional controlled blasting, Burden, Throw control, Powder factor, Unstable slope, Railway track
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	09 Jul 2020 09:43
Last Modified:	09 Jul 2020 09:43
URI:	http://cimfr.csircentral.net/id/eprint/2250

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