In rock blasting, there are different constraint conditions such as a free surface, a partial free
surface and a free surface with a barrier nearby. These conditions were modelled by three …

Fractures in rock cylinders with a central blasthole have been investigated, focusing on the
borehole expansion, the crushed zone around the borehole, and the effects of the boundary …

It is shown that blast fragmentation data in the form of sets of percentile fragment sizes, x P,
as function of specific charge (powder factor, q) often form a set of straight lines in a log (x P) …

Due to the complexity of multi-hole blasting rounds, single-hole blasting has often been
used in order to understand the fragmentation mechanisms. This paper reviews and …

Blasting with the aim to reduce oversize boulders in underground has many hurdles due to
limited accessibilities and poor site conditions. Optimized drilling and blasting parameters …

Using blasting caps with electronic delay units, it has become possible to employ wave
superposition in rock blasting. This paper presents computer simulations to investigate the …

Two confined pillar tests were conducted at the Kiirunavaara mine to investigate the degree
of compaction of three materials, ie, 0–32-mm backfilled material, a blend of ore and waste …

LKAB operates two underground iron ore mines located in the northern part of Sweden, both
using sublevel caving as mining method. Knowledge of the mechanisms of gravity flow is …

The sublevel caving mining method is described in the introduction. The problem in sublevel
caving is if the swelling and fragmentation of the ore is not enough, then the mobility of the …

Due to the complexity of multi-hole blasting rounds, single-hole blasting has often been
used in order to understand the fragmentation mechanisms. This paper reviews and …