Blast Design Excel Template v4.2

The Blast Design Excel Template v4.2 serves as a standardized computational framework for blast engineers and drilling supervisors to translate geological and geotechnical inputs into executable blast plans. Built in Microsoft Excel with embedded logic, data validation, and conditional formatting, it incorporates industry-standard methodologies—including the Konya & Walter (1991) and Langefors–Kihlström models—for predicting fragmentation, flyrock risk, and airblast levels. Users input site-specific data such as rock type (via RMR or UCS), explosive type and strength (e.g., ANFO density and VoD), borehole diameter, and desired fragmentation size (e.g., P80), and the template automatically computes optimal blast geometry and loading parameters. Advanced features include sensitivity analysis sliders, warning flags for over/under-stemming or excessive burden-to-spacing ratios, and summary reports for stakeholder review. Version 4.2 introduces updated vibration prediction algorithms aligned with USBM and DIN 4150-3 standards, enhanced compatibility with GIS-linked survey data, and export functionality for integration with mine planning software (e.g., MinePlan or Deswik).