Paswan, RK and Roy, MP and Singh , PK (2018) Peak particle velocity, peak vector sum, dynamic simulation, damping coefficient, blast induced vibration. MGMI Transactions, 114. pp. 24-39. ISSN 0371-9538

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Abstract

Several techniques are in common use for extraction and excavation of ore deposits such as surface miners, excavators, rock cutters, rock headers, and drilling and blasting. Among these, the latter remains the most inexpensive method of rock fragmentation and ore extraction, and in which characteristics of rock, explosives and blast design are considered as fundamental elements in this process. Although proper fragmentation remains the key objective, potential damage to back-wall and pit-wall has been considered of lesser importance than the same for residential structures. The main reason for this lies with the complex nature of the geological characteristics of the rockmass in the immediate vicinity of the blasting operation. The paper is based on the research work carried out at Rampura-Agucha Lead-Zinc mine, Rajasthan, India. The ores and associated rocks are extracted by both open-pit (opencast) and underground mining methods. The open pit mining is currently producing 5.95 MTPA of ore. The underground part has started recently with expected production of 4.5 MTPA in the near future. The open-pit mining operation currently is at 366 m depth and is designed to reach up to a depth of 421 m. Blasting is carried out on benches 10 m to 11.5 m high with berm length of 5.3 to 6 m. Controlled blasting techniques are being used in the mine, to minimize overbreak and backbreak. Along with pre-split blast designs, production blast designs and explosive initiation techniques such as decoupling, decking, side-initiation, etc. are being employed to minimize and control overbreak

Item Type:	Article
Subjects:	Blasting
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	03 Nov 2022 10:32
Last Modified:	03 Nov 2022 10:32
URI:	http://cimfr.csircentral.net/id/eprint/2548

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