Research on energetic demolition micro device for rapid fire rescue

During fire scenarios, establishing emergency escape routes rapidly inside buildings is the primary factor in improving fire survival rates, with fast and efficient demolition of windows acting as a critical technical measure. A shaped demolition device that integrates an energetic micro-trigger (based on an initiator—copper azide—titanium flyer) with the CL-20 energetic material is proposed. First, a blast pressure-strength matching model is established between the energetic materials and the materials to be demolished. Analysis indicated that a φ3 mm × 3 mm CL-20 generates a pressure of up to 35 GPa on tempered glass and thus realizes complete fragmentation of 10-mm-thick tempered glass within 600 μs. Second, the study establishes a theoretical model of the flyer velocity in the time domain, demonstrating an error of less than 7 % between the theoretical and experimental values of the flyer’s peak speed. Finally, in the demolition system, under 20 V/33 μF electrical stimulation, a φ1 mm × 1 mm copper azide can drive a titanium flyer of 40 ∼ 80 μm to detonate the CL-20 reliably and shatter 15-mm-thick tempered glass completely. The energetic micro-demolition device proposed in this study enables rapid, reliable destruction of high-strength window materials to create emergency escape routes. It improve trapped victims’ survival probability significantly in fire scenarios, thus demonstrating strong practical applicability.