284
6 ASSESSMENT OF RELEVANCE OF LARGE-SCALE BLAST
MODELLING RESULTS
To assess the relevance of the imitation simulation results of the borehole charges explosion,
a comparison was made of the calculated and actual break line contours for one of the largescale blasts at the Zhelezny open-cast mine of Kovdorsky GOK JSC. A comparative analysis
of the modelling results with the results of geodetic and geophysical studies in this block was
conducted.
In order to comply with the maximum accordance of a real blast and its model, the authors
used the results of laser scanning of the block area before the blast, as well as the results of
determining the coordinates of the boreholes, their depth and other technological and geological information contained in the large-scale blast project. Figure 6 shows a model of an
explosive block with an indicated damage area resulting from the large-scale blast modelling.
As a result of the analysis [10], the actual location of the damage boundaries along the
profile of the GPR sounding was obtained. The combination of the predicted and actual
boundaries along the sounding profile made it possible to estimate how accurately the modelled boundary of break line reflects the results of a real explosion (Figure 7).
According to the figure, the predicted and actual destruction boundaries for the most part
of the profile are close to each other, which suggests the possibility of using the large-scale
blast modelling tool to assess the quality of design solutions.
Figure 6. Model of an explosive block with an indicated damage area resulting from the modelling of
a large-scale blast.
Figure 7. Cut along one of profiles of GPR sounding of a bench before and after a large-scale blast
with indicated predicted and actual boundaries of damage.
_ ,.
_.,
-100
E
-5 -10>
(l_
Q)
0
-110
-11!5
-120
0
'
-b'"
-Distance, m
10
"
20
1"'\
-
-surface of a bench along the
the sounding profile before the
explosion
- the boreholes near the line of
the sounding profile
- - - the actual location of
break-line boundary obtained
as a result of the GPR sounding
data analysis
- - -the locat ion of break-line
boundary predicted by t he
large-sca le blast modelling tool
6 ASSESSMENT OF RELEVANCE OF LARGE-SCALE BLAST
MODELLING RESULTS
To assess the relevance of the imitation simulation results of the borehole charges explosion,
a comparison was made of the calculated and actual break line contours for one of the largescale blasts at the Zhelezny open-cast mine of Kovdorsky GOK JSC. A comparative analysis
of the modelling results with the results of geodetic and geophysical studies in this block was
conducted.
In order to comply with the maximum accordance of a real blast and its model, the authors
used the results of laser scanning of the block area before the blast, as well as the results of
determining the coordinates of the boreholes, their depth and other technological and geological information contained in the large-scale blast project. Figure 6 shows a model of an
explosive block with an indicated damage area resulting from the large-scale blast modelling.
As a result of the analysis [10], the actual location of the damage boundaries along the
profile of the GPR sounding was obtained. The combination of the predicted and actual
boundaries along the sounding profile made it possible to estimate how accurately the modelled boundary of break line reflects the results of a real explosion (Figure 7).
According to the figure, the predicted and actual destruction boundaries for the most part
of the profile are close to each other, which suggests the possibility of using the large-scale
blast modelling tool to assess the quality of design solutions.
Figure 6. Model of an explosive block with an indicated damage area resulting from the modelling of
a large-scale blast.
Figure 7. Cut along one of profiles of GPR sounding of a bench before and after a large-scale blast
with indicated predicted and actual boundaries of damage.
_ ,.
_.,
-100
E
-5 -10>
(l_
Q)
0
-110
-11!5
-120
0
'
-b'"
-Distance, m
10
"
20
1"'\
-
-surface of a bench along the
the sounding profile before the
explosion
- the boreholes near the line of
the sounding profile
- - - the actual location of
break-line boundary obtained
as a result of the GPR sounding
data analysis
- - -the locat ion of break-line
boundary predicted by t he
large-sca le blast modelling tool