The Technology And Application Of Controlled Blasting In Huangdao Oil Storage Cavern

Huangdao Oil Storage Cavern is currently the world’s single largest caverns excavation works, the library always open dig up15930m, excavation of the total party amounted to367×104m3, mainly by the main caverns, shafts, water curtain system and construction of roadways and other components. Notable features of Huangdao Oil Storage Cavern is a large number of densely arranged in parallel, non-lining or no lining basically sealed caverns underground.This paper analyzes Huangdao Oil Storage Cavern controlled blasting characteristics, difficulties and major technical problems; According to the actual situation, proposed bench and vertical hole pre-splitting blasting, bench and vertical hole smooth blasting, horizontal shallow hole and smooth blasting a variety of different control schemes, the development of a reliable monitoring system blasting, blasting through the underground caverns damage characteristics were studied, proposed three conditions for controlled blasting technology is applicable in large caverns excavated dense seal.While clearly the concrete blast control points:drilling accuracy, single-stage initiation dose, and charge kits diameter structure; Huangdao Oil Storage Cavern excavation blasting vibration seal security monitoring tools, and the measured data were analyzed and statistical systems; Against dust and water spray foam dust conducted a field experiment to compare the election to determine the optimal storage Huangdao Oil Storage Cavern underground excavation blasting harmful effects of integrated control technology to achieve the effect of up to45%dust standards.This paper make a comprehensive summary on practical and successful experience of groundwater storage Huangdao Oil Storage Cavern excavation blasting,it can be extended in similar projects.