The Enaex Mining Technical Solutions team will film blast events using a camera that films at speeds up to 1,000 frames per second.
Video at this frame rate can reveal the details of blast performance that might be otherwise missed using conventional video recording equipment. Conventional video recorders operate at ~30 fps, this equates to 1 frame every 33 ms. Using higher frame rates allows more detail to be captured. High-speed videography can be used in determining the reaction time of the rock that is being blasted. The reaction time is the time between detonation of the explosive charge and the time that the rock actually begins to move. This number can be used in timing design to ensure that there is enough relief between holes. High-speed videography can be used to determine if holes are firing out of sequence, either by non-electric cap scatter or sympathetic detonation; or conversely it may aid in identifying holes that may not have fired.