MECHANISED COAL
support trolleys with the ability to compress as
the longwall face retreats. Upon full compression
a power move takes place. Air or emulsion
powered traction drive units are used to perform
the power move, eliminating the need for
ancillary equipment.”
Grosvenor’s pump stations are from Longwall
Hydraulics; the installation was completed in
September 2016. The contract included the
supply of two complete pump stations, two high-
pressure emulsion filter/dump pods and two
general purpose water filter pods. The Grosvenor
pump station is the largest pump station
manufactured by Longwall Hydraulics with each
pump cart containing six Kamat K25055 3G M
system pumps and two K25040 3G M hi set
pumps giving a total emulsion output of 2,716
litres/min. The tank carts are another milestone
for Longwall Hydraulics with the largest ever
shearer water pumps installed, each K25095 3G
MC shearer water pump is cable of delivering
1,148 litres/min of raw water.
As well as being the largest pump station
manufactured by Longwall Hydraulics the
Grosvenor system is also the most advanced
system with online condition monitoring of all
pressure and flows of the emulsion, shearer
water, general purpose water and compressed air
systems carried on board the station. The
Grosvenor pump station is also the first to steer
away from the traditional copper electric network
and implement a new fibre optic remote IO
system allowing a significant reduction in the
amount of cables on board whilst maintaining
redundancy, speed and reliability.
In addition to the two pump stations the
Grosvenor contract included two high pressure
emulsion filter/dump pods and two general
purpose water filter pods. The high pressure
emulsion filter dump pods included four Seebach
10703 cartridge filters complete with an
automatic back flush system, five Joy dump
valves and a complete isolation/bleed panel
system all fully enclosed in steel/lexan panel
frame work. The filters and dump valves are
Grosvenor pump and tank carts assembled by
Longwall Hydraulics undergoing factory testing
controlled by a combination of the Joy RS20S
network and the Becker Mining Promos system.
The general purpose water filter pod carries four
Arkal back flushable filter housings controlled
manually by a Bermad back flush valve assembly.
Again the general purpose water filter pod is also
connected to the Becker Mining Promos system
for differential pressure monitoring.
The Grosvenor pump station contract was kept
to strict deadlines and all milestones were
reached on time, this allowed Grosvenor to
SEPTEMBER 2017 | International Mining 41