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Author: Partha Das Sharma (E.mail: sharmapd1@gmail.com)
1
Controlled Blasting Techniques
To mitigate adverse impact of blasting in Open pits,
Quarry, Tunnel, UG metal mines and construction
workings
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By: Partha Das Sharma (Email: sharmapd1@gmail.com)
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Author: Partha Das Sharma (E.mail: sharmapd1@gmail.com)
2
Controlled Blasting Techniques – Means to mitigate adverse impact of
blasting in Open pits, Quarry, Tunnel, UG metal mines and construction
workings.
By: Partha Das Sharma
1.0. Introduction: In both the mining and construction industries, blasting is the
predominant method for fragmentation of consolidated mineral deposits. Mines, quarries
and construction sites that were formerly located relatively remote areas now find
themselves near congested areas. The public relation problems of users of explosives
have increased greatly within the past few years as explosives are being consumed in
increasing quantities by mines and infrastructure development agencies. New
expressways, underground metros are being constructed to connect the cities with
downtown areas built through the middle of long-established business and residential
neighbourhoods. Open pit mines and quarries are carrying out mega blasts very often, in
order to enhance their production. Tunnel and construction blasting, now a days,
emphasize more on reduction of blast induced back-break to preserve the property of
host rock intact for safety and economic reasons. UG metal mines are very much keen
to maximize value of their output by improving their quality standard of ore by preventing
ore dilution at the stopes by reducing over-break of the wastes and wall rocks. They are
also conscious about the back-fill done at the stopes, which should no