Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor

aw materials and use the various agents<br />
in the existing production processes.<br />
Disposal of flotation was performed by<br />
classical way, so that the downstream part of<br />
the river formed the initial barrier of coarse<br />
sand particles and surface mining overburden<br />
and disposal of flotation tailings throughout<br />
the upstream valley of the Bor River.<br />
Based on data from the previous period<br />
(technical documentation and existing literature),<br />
disposal of tailings began by<br />
French in the north part of the Bor Stream<br />
in the near vicinity of railway station, from<br />
1934 until 1941, when the Germans continued<br />
with disposal of tailings in the<br />
lower southern parts of the Bor Stream.<br />
Immediately after the World War II, after<br />
reconstruction of the mine, disposal of<br />
tailings continued with a deposit of tailing,<br />
so that today the entire bed of the Bor<br />
River is filled with the flotation tailings,<br />
and the terrain was roughly flattened, at<br />
approximate level of 356 m in the central<br />
part of the Field I and middle level of 369<br />
m in the flotation tailing Field II. Specifically,<br />
in the south of the flotation Field I,<br />
perpendicular to the Bor River, approximately<br />
between the flotation facilities and<br />
just north of Slaughterhouse (Figure 1), a<br />
dam was formed of flotation sand.<br />
Fig. 1. View of the old Bor Flotation Tailing Dump [4]<br />
The second dam is situated downstream,<br />
and the flotation tailings was deposited<br />
between the dams, such as the<br />
coarsest particles of sand were separated<br />
and deposited on the banks of the Bor<br />
River, until the middle part was filled with<br />
finer flotation tailings. Disposal of tailings<br />
was done until 1987, and the final heights<br />
of dams are the following [3]:<br />
- upstream dam near the flotation facilities,<br />
was completed at level 372 m,<br />
- downstream dam was completed at<br />
level 373 m with an average elevation<br />
of tailing dump of 369 m.<br />
Average depth of tailing dump is about<br />
30 m.<br />
Mass of tailings in a tailing dump per<br />
fields is:<br />
- Field I 3,922,146 t<br />
- Field II 22,846,122 t<br />
Total 26,768,268 t<br />
No 4, 2011. 6<br />
MINING ENGINEERING