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

• Sub-Level Caving (SLC) is an important mass mining method, involving blasting of ore against granular material in the form of caving debris. The 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. The tests have shown to be a good input for numerical modelling of blast compaction.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Annan samhällsbyggnadsteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Other Civil Engineering (hsv//eng)

Nyckelord

confined blasting

dynamic blast compaction

SLC

sub-level caving

granular materials

numerical modelling

distinct element modelling

mass mining

debris compaction

ore blasting

blasting tests

acoustic impedance

sprängning

kompaktering

numerisk modellering

Mining and Rock Engineering

Gruv- och berganläggningsteknik

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)