Problematika trhacích prací při ražbě tunelů ve Stockholmu

Abstract

The work deals with the issue of blasting work during tunnel excavation on the Järfäll project in Sweden. The theoretical part in the introduction defines the theory of explosion and describes the means of blasting technology. In its remaining part, it deals with Olofsson's theory of blasting design, especially its optimization for higher variability of cut calculaton and for emulsion explosive. The introduction to the practical part talks about the Järfäll project, its geology and the means used for blasting. Subsequently, the calculation of blasting works is performed according to the optimized Olofsson theory for two methods - packaged explosive with electric initiation and emulsion explosive with non-electric initiation. The conclusion compares both methods, where the result of a comprehensive analysis in the form of a case study is a financial comparison.