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1. Accurate drilling is a pre-requisite for optimum blasting. Drill hole deviation is a common but undesirable occurrence in the jointed rock masses.

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Following are the techniques of controlled blasting: Line drilling, Trim (Cushion) blasting, Smooth (contour or perimeter) blasting, Pre-splitting, Selecting and employing various parameters of blast design, using modern technology, Precise and accurate timing delays, Muffle blasting at critical and congested areas.

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