Global
Minerals (Sarawak) Sendirian Berhad (GMS)
Global Minerals (Sarawak) Sdn Bhd is the operator of
the largest coal mine in Malaysia. Our brand of "MeritCoal" is one of
the most environment friendly coals with very low sulphur content. MeritCoal
also has relatively low nitrogen and ash content.
MeritCoal is produced from the Merit-Pila
coalfield. The coalfield is the largest in Malaysia with an area of approximately
260 square kilometres and is located in Kapit area of Sarawak. Exploration
by Global Minerals and the Malaysian Governement Minerals and Geoscience
department shows that the entire Merit-Pila coalfield has more than 400
million metric tonnes of coal resources.
Background
Coal exploration in the Merit-Pila area started in 1972. In late 1987
mining commenced and the first shipment was made in 1988 to Japan. Since
then MeritCoal has been exported to Bangladesh, Taiwan and Japan. In 1993,
a contract was signed with Tenaga Nasional Berhad (Malaysian national
utility company) for supply of coal to their power station. In 1994 another
contract was signed with Sejingkat Power Corporation Sdn Bhd for the supply
of coal and shipment commenced in 1997.
Accessibility
Travel to the mine site begins from Kuching, the capital city of
Sarawak state. Forty minutes flying time is required to reach the town
of Sibu. From here visitors board an express boat to Kapit town. The journey
will take approximately 21/2 - 3 hours. From Kapit town, a speed will
transport visotors to the Coal Preparation Plant and Stockpile yard. The
short trip takes 20 minutes. The site mine is approximately 44km northwards
from here. Travel time by 4 wheel-drive is about 60 minutes.
Exploration
In order to have an accurate picture of the potential mining areas prior
to mining, an Exploration Department was established to collect data.
The team comprises geologists, surveyors, drilling supervisors, drillers
and survery assistants. Locals were also recruited to assist to field
operations.
Field reconnaissance surveys were conducted by geologists. Coal outcrop
were then recored and surveyed. Boreholes were drilled to delineate the
coal seams as well as to determine the lateral and down-lip extension
of the coal seams. Boreholes spacing ranges from 50-200 m in other areas.
Koken boring machines and Longyear boring machines are engaged with the
drilling. The cores recovered were examined by the geologists and the
data compiled. The completed bareholes would be surveyed. Typography maps
on scale ranges from 1:1000, 1:1500 were produced for geological evaluation
and mine planning purposes. Global Minerals employ a team of experts comprising
of geologists, land surveyors and drillers to explore the potential mining
areas prior to mining.
Mining
Coal mining is carried out by Global Minerals and our contractors. Scope
of work covers all land clearing, overburden removal and dumping, excavation,
stockpilling (if any) and loading to haulage trucks. Heavy machinery used
involve bulldozers like Komatsu D-155, excavators like Komatsu PC-300,
Hitachi EX - 350. Motor graders are also used to provide smooth access
roads to the mine site and for road maintenance. Mercedes and Nissan dump
trucks are used to carry away the waste minerals from the mine pits to
designated dumpsite.
Currently, coal is mined by opencast method. Mining operation commences
from the coal outcrop line and extends along the strike of the coal seam
and follow down-dip to reach the deeper part of the coal seam. The pit
is further sub-divided into mining blocks according to the geology, overbirden,
coal thickness, drainage, dumping distance etc; to obtain optimum productivity
Hauling
Coal haulage from the mine pits to GMS Preparation
Plants and StockPile Yard is carried out by heavy duty trucks. We employ
a combination of Mercedes, Volvo and Nissan trucks. Subject to weather
and customer requirements, our trucks could operate up to 24 hours daily.
Coal
Processing Terminal
The preparation plant is equipped with 2 McClanahan primary and secodary
crushers. They are designed to produce up to 100mm size at crushing rate
of 140 metric tonnes per hour. The raw coal stockpile yard has capacity
of 100, 000 metric tonnes. Loading coal to barge os by conveyor system
with a transfer rate of about 300 metric tonnes per hour.
Barging
and Shipping
Barges with capacity of 2000 to 3500 metric tonnes are used to
transport the coal to a transshipment point at Tanjung Manis anchorage,
the coal is transferred to ocean going vessels using the vessel's showel
grabs. The high-water draft at the estuary of the Kuala Rejang at Tanjung
Manis is approximately 8.5 metres.
For GMS's contract with Sejingkat Power Corporation, the coal is barged
directly to SPC's jetty outside Kuching. Barging time from the loading
site to transshipment point at Tanjung Manis is approximately 28 hours,
while the time to SPC's jetty in Kuching is approximately 3 days.
Coal
Quality
MeritCoal produced from the coal seams of the Merit-Pila Coalfield
belong to sub-bituminous B rank, with extremely low sulphur and low ash
content. MeritCoal has the following specification: