Type of research: developmental Duration from: 01/01/91. to 01/01/97. Papers on project (total): 13
Institution name: Geotehnički fakultet, Varaždin (160) Department/Institute: Department for open pit exploatation Address: Hallerova 7 City: 42000 - Varaždin, Croatia
Phone: 385 (042) 41-532
Fax: 385 (042/45-587)
Summary: Successful blasting in open pits depends on physical and
chemical properties of rocks and blasting method relating ot them. Optimal
blasting is based on the results of test blasts, calculations with computer
blasting simulations, and experimentally defined rock properties. The
method of seismic refraction was used to determine the overall
homogeneousness or anisotropy of rock, namely spatial distribution of
compact and fractured zones within rocks. For each variant obtained from
the velocities of longitudinal seismic waves it was then possible to find
out parameters for blasting designs. Recent rock massif prospecting
methods based on geophysical procedures of refraction seismic profiling.
Results obtaidned are also used to define blasting parameters thorugh
computer-simulated transfer of energy to the rock.
Research goals: Optimal quantity and type of exsplosive and mining
technique, based on explorations of a rock mass, are defined by: - breaking
of rock into optimal fragments, - limits on vibrations at surrounding
(urban) areas caused by blasting, - to get maximum effect using the minimum
possible specific consumption of explosives. It is planned that numerical
data of this investigation will be used by Mr. sc. Stjepan Strelec in his
doctor thesis. Other information about the project.