BUCKET WHEEL EXCAVATOR KWK-910 - SKW

GENESIS
Deposit exploitation conditions
- the basis for the project assumptions
for KWK-910 excavator.
After many years of exploitation, Turoszów deposits are
still evaluated to possess almost 500 mln tons of industrial
resources of lignite but their further exploitation will be largely
hindered by deteriorating geological and mining conditions.
The deposits of the first lignite deck and overlay to be exploited
are characterized by a highly complicated and irregular
geological struc ture (irregular depositing, faults,
multidirectional sloping, fractures and discontinuities) as well as
highly differentiated digging characteristics (from considerably
easily diggable to hard diggable layers, stone insertions and
interlayers of cohesive rocks). The excavators currently operated
in Turów opencast mine are not adapted to the efficient
exploitation in such differentiated deposits, which results in
their high mortality and, as a consequence, low actual capacity
as compared to their theoretical parameters. The mentioned
exploitation conditions of hard diggable formations in the
overlay of the first lignite deck made it necessary to design an
excavator:
�with resistance suitable for the required digging
parameters at the required capacity and with machine elements
and the bearing structure durable enough,
�with technological parameters such as the range of
lowering and slewing of the extension arms, manoeuvrability,
traction parameters, foundation pressure, etc. which ensure its
proper functionality on highly complicated, short and sloppy
exploitation frontlines.
The above mentioned requirements were specified in
details in the project assumptions for the “Contract of the main
contractor of a single-unit wheel excavator of KWK-910 type for
the exploitation of hard diggable formations” signed on
21.11.2003 by and between the Management Board of BOT
KWB Turów S.A. and SKW Biuro Projektowo-Techniczne
Sapkowski, Kanczewski, Wocka sp.j. in Zgorzelec.
That was the decision to construct the first in Poland
excavator for the exploitation of hard diggable formations; an
excavator designed especially for deposit conditions of BOT
KWB Turów S.A.