Porous, water-saturated geologic materials exposed to shock wave loading should undergo a gradual transition from a Terzaghi solid to a much stronger and stiffer material as the confining pressure increases over the range of about 0.2 GPa to about 2 GPa. This transition can thus be expected to become important in cases such as high explosive or nuclear cratering events in which ground shocks in...

Abstract Experiments are carried out to determine the effects of particle size and mass loading on free-field blast wave from spherical, constant volume metalized explosive charges. The charges comprised gelled nitromethane with uniformly embedded aluminum, magnesium, or glass particles. Particle sizes varied over an order magnitude fractions up 50%. Peak overpressures directly measured within ...

improving anaerobic performance and anaerobic power is the critical aspect on successfully in competitions for many athletes. the purpose of current research was to investigating the effect of various pre-competitions warm-up on anaerobic performance. it has been shown that, differences pre-competitions activity may effect on anaerobic and explosive performance. effect of general warm-up, witho...

Abstract The adduct of Urea and Hydrogen Peroxide (UHP), also called Carbamide Peroxide, is industrially produced as a solid source hydrogen peroxide for bleaching, disinfection, oxidation reactions. As chemical combination fuel oxidiser, UHP has explosive potential but it unclear whether could sustain detonation at small scale. In the configuration we tested, succeeded in recording self‐sustai...

Purpose is to determine a function of the reduced expenditures connected with drilling-and-blasting operations, loading and hauling rock fragmentation depending upon cost machine-shift applied facility, its operation modes, hardness being blasted, used explosive, quality based developed optimization mathematical model. Methods. Method statistical evaluation natural blockiness structure as well ...