Optional temporary roof supports
(TRS) and canopy structures offer
operators additional protection when
warranted by conditions or required
by regulation. They are also designed
for productivity, with hydraulic cutter
head extensions that retract to enable
easy withdrawals, as well as greater
flexibility in cutting corners.
The Joy 12CM30 miner bolter offers
a range of features and configurations
to service mid- to high-seam mines
with proven high-performance cutting
and bolting technologies. It is a
single-pass machine designed for
roadway cutting widths of 4.8 – 5.4 m.
The 12CM30 miner bolter has a wide
install base in longwall entry
development applications in Australia,
with an increasing presence in the
Eurasian market. Over 15 yr of
continuous improvements and
developments are incorporated into
the latest models.
The ED25 range of miner bolters
was conceived in 2005 when
Joy Global launched a project to
produce the next generation of
simultaneous cut-and-bolt machines
for longwall entry development. The
model range consists of two products
for varying applications: the 14ED25
miner bolter for lower seam heights
– typical in the US – and the 12ED25
miner bolter for higher seam
applications in Australia and other
countries. Both models share a
significant number of components.
Joy’s newest addition to the entry
development fleet is the 12ED30. This
is a true simultaneous cut-and-bolt
machine developed for the entry
development markets of China,
Eurasia, Russia and India. The
12ED30’s shield design and
forward-tilt roof bolters combine to
provide the closest to face bolting
capability of any sumping-frame
entry driver currently on the market.
The 12ED30 features 340 kW total
cutting power and a total machine
power of 650 kW. The newly
designed, heavy-duty sliding frame
provides a significant increase in
service life compared to the first
rebuild.
All the machines share the Faceboss
control platform, which can maximise
productivity in a variety of ways.
Automated sequences generate
consistency in machine operation and
results in the face of changing
operators and changing conditions.
The Faceboss control platform includes
an onboard graphical display that
includes a log of events, messages and
alarms. All key machine operating
parameters are continuously
monitored and recorded during
machine operation and can be sent to
the surface for analysis through
Joy Global’s integrated JoySmart
Solutions. This offering builds on the
company’s direct service model, which
offers customers the chance to partner
directly with the company to improve
performance. Included in this direct
service model is access to the
company’s worldwide parts and
support network.
Joy Global also works with
customers to understand the support
needs and develop solutions that allow
for the fastest installation of the
prescribed bolt (single pass drilling
and bolting) with the ability to install
in a wide range of placements (both
roof and rib) to suit all mine plans.
Delivering results
Specifically designed for higher seam
applications, the 12ED25 model has
achieved noteworthy results at
Anglo American’s Grosvenor mine in
Australia’s Bowen Basin.
Anglo American needed an entry
driver at Grosvenor that could deliver
the same high productivity of the Joy
continuous cut-and-bolt machines in
the US, while also meeting the
challenges of the greater roof support
density requirements in Australia and
without compromising safety and
productivity.
In introducing the machine to the
mine, the Joy Global team was faced
with the challenge of meeting the
company’s aggressive production
ramp up requirements. The
introduction of the longwall gateroad
entry driver machines at the mine,
therefore, needed to be flawless.
“With the Grosvenor mine being a
major new project for Anglo and,
facing the head winds of a tough coal
market, we have high expectations on
Joy Global’s entry development
equipment,” said Glen Britton, Head
of Underground Operations for
Anglo American Coal.
The operating platform of the
Australian entry driver was derived
from Joy Global’s successful 14ED25
and 12ED25 continuous cutting and
roof support product platforms, which
were developed for the US market.
The 12ED25 bolter miner design
encompasses new levels of
automation, including the ability to
operate in auto cut, auto sump and
loading mode capability. The auto-cut
system, which is in the final stages of
refinement, also includes the system
intelligence to make horizon
corrections, while maintaining smooth
floor profiles. These features,
combined with high-powered twin
274 kW cutter motors, provide a highly
Joy's 12ED25 model used at the Grosvenor mine in Australia.
34
|
World Coal
|
January 2016
