As an important parameter in blasting design, charging structure directly influences blasting effect. Due to complex conditions\nof this blasting and excavating engineering in Jiangsu, China, the authors carried out comparative researches with coupling\nstructure, air-decoupling structure, and water-decoupling structure. After collecting, comparing, and analyzing produced signals\non blasting vibration, the authors summarized that when proportional distances are the same, water-decoupling structure can\nreduce instantaneous energy of blasting vibration more effectively with more average rock fragmentation and less harm of dust.\nFrom the perspective of impedance matching, the present paper analyzed influence of charging structure on blasting vibration\nenergy, demonstrating that impedance matching relationship between explosive and rock changes because of different charging\nstructures. Through deducing relationship equation that meets the impedance matching of explosive and rock under different\ncharging structures, the research concludes that when blasting rocks with high impedance, explosive with high impedance can\nbetter transmits blasting energy. Besides, when employing decoupling charging, there exists a reasonable decoupling coefficient\nhelping realize impedance matching of explosive and rock.
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