![]() ![]() Rock properties often vary greatly from one end Rock properties are very qualitative and cannot be suffi-Ĭiently quantified numerically when applied to blastĭesign. Variable affecting the design and results of a blast. The rock mass properties are the single most critical Results such as backbreak, ground vibrations,Īirblast, unbroken toe, flyrock, and poor Excessive confinement ofĮxplosives is the leading cause of poor blasting (2) There must be adequate space for the broken rock (1) Explosives function best when there is a free faceĪpproximately parallel to the explosive column atthe time of Throughout the blast design process, two overriding prin. Field testing is the best tool to refine individualblast TheseĬoncepts are useful as a first approximation for blastĭesign and also in troubleshooting the cause of a badīlast. Provides the fundamental concepts of blast design. ![]() Tradeoffs frequently must be made when designing theīest blast for a given geologic situation. Varying properties of rock, geologic structure, and explo-sives,ĭesign of a blasting program requires field testing. du Pont de Nemours & Co., Inc., 1978).īlast design is not a precise science. Procedures Manual (Dick et al., 1987) and theBlasters This chapter is an introduction to blasting techniquesīased primarily on the Explosives and Blasting ![]()
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