Dynamic blast compaction of some granular materials: small-scale tests and numerical modelling of a mining-related problem

摘要

Sub-Level Caving (SLC) is an important mass mining method, involving blasting of ore against granular material in the form of caving debris. Lhe debris compaction due to blasting influences the caving process. Blasting tests were made on cylinders of magnetic mortar placed inside plastic cylinders and confined by packed granular material. By introducing the acoustic impedance between the mortar and the confining granular material, the compaction is found to depend on material, specific charge and physical properties of the debris with statistical analysis. Lhe tests have shown to be a good input for numerical modelling of blast compaction.