Use of in-situ rock properties for optimization of fragmentation

摘要: This paper discusses the use of pressure transducers in water filled boreholes conjunction with surface mounted geophones to gather field data for in-situ dynamic rock properties determinations. A high speed collector is used capture field. The calculated P and S wave velocities density measurements are as input into Blastcalc program where values Young`s Modulus Poissons Ratio calculated. information along geological structural explosives a 3-D blast modelling calculate predicted fragmentation distribution other performance criteria based on proposed design. system valuable tool initial design calculations carried out feasibility studies development new ore bodies, or modifications existing designs. actual this designs at both mine operating phase mine. comparison achieved shown. Results various configurations can be rapidly compared achieve optimum lowest drilling blasting cost.