Comparison of Two Techniques Presplitting and Smooth Blasting

Drilling and blasting methods have been extensively applied to rock excavation in mining and civil engineering due to its low cost, high efficiency, and easy operation. However, some inevitable negative effects are often encountered under the blasting loads, such as blast-induced damage and vibration. To minimize and reduce these problems, presplit and smooth blasting as the advanced control techniques have been widely introduced into blasting design .  
Souce: Zilong Zhou and others. 

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https://easy4downloader.blogspot.com/2019/10/comparison-of-two-techniques.html