Problematika trhacích prací při ražbě kanalizačního sběrače

Abstract

This work deals with the issue of blasting during excavation of the sewer collector. The theoretical part defines the theory of explosion, describes the invidual means of blasting technology, methods of excavation, the method of assessing the blasting work according to seismicity by ČSN 73 0400 and the method of dimensioning the charge by Měcíř–Válek. Firstly, the practical part describes maximal charge calculation for one time degree by ČSN 73 0400, Secondly, it defines calculation of blasting work, including shocktube initiation network. Calculation is performed for conventional explosive Perunit E, then for an alternative in the form of expansion catridges AutoStem III. Conclusion of the thesis justifies the use of shocktube initiation network and compares both metods.