Blasting Procedures Continued

November 22, 2009

All rock excavation where excavation slopes are one horizontal to two vertical (1 H to 2 V) or steeper shall incorporate controlled blasting unless otherwise ordered by the Engineer. Controlled blasting shall be defined as the controlled use of explosives in carefully located and aligned drill holes to establish a free surface or shear plane in the rock at the specified excavation backslope. Production blasting refers to rock fragmentation blasts resulting from more widely spaced production holes throughout the main excavation area next to the controlled blast line. Controlled blasting techniques include presplitting and cushion (trim) blasting. These techniques are required to minimize blast damage to the designated rock backslope and to improve the long term stability of the slope.

More information about blasting here :

Blastign Safety Procedures : Minimum Steps to be taken for the Test Shots

Blasting Safety Procedures | Precautions

Written by admin · Filed Under Civil