LAND COMPENSATION AND CULTIVATED PLANTS MINING OPERATION ACTIVITIES
The stages of mining activities by means of open pit consist of:
1. Land clearing, Stripping and Removing the Topsoil Mine clearing operations are conducted at locations where
mines will be opened or open pit. In connection with this operation, there are a number of works to be done which
are:
a Clearing of bushes and shrubs This work is done by using a bulldozer, which perform
the digging-pushing function by utilizing the blade and the big pushing power. Bushes and shrubs that cover the
mining area would be pushed to the edge of the mining areas.
b. Felling trees and cutting woods Before the mining area clearing operations, it is
necessary to fell trees and cut woods on the area to be cleared. In removing the woods, it is used heavy load
lifting equipments and iron chains for binding and pulling, before transported by truck.
c Topsoil stripping operation The topsoil, that contains lots of organic materials
resulted from of weathering process that enrich the soil, stripping operation is performed after clearing
the mine. This fertile soil layer is stripped by using the blade of bulldozer. The and topsoil layer is pushed
and piled at specific locations close to bulldozer operations area, and then loaded using excavators and
transported with a dump truck into the topsoil storage area. This fertile soil pile will be utilized when
performing the reclamation work.
2. Excavation and overburden removal operations The operation of excavating the cover layer in the form of
overburden and
inter-burden, is
performed by
using excavator Komatsu PC-400, or other of the same class, and
assisted by bulldozers Komatsu D155A and Komatsu D375A or others of the same class. Soft to moderate materials are
directly excavated and loaded into dump trucks. For hard to very hard materials, the dismantling method is
done in two ripping ways. The ripping process is performed for the material that has been hard on the assumption that
dismantling by using the excavator is no longer optimal directfree digging. Ripping is done by using the
Bulldozer equipped with a Ripper. The equipment used is Komatsu D155A and Komatsu D375A or others of the same
class. Removal of excavated overburden material, is performed by
using the excavator as a loading equipment, and dump trucks Nissan CWB or others of the same class as the means
of conveyance. The cover soil layer is transported from the mining area to the planned dumping area, which is the
nearest former mining area or dead areas nearby the mine. To overlay, leveling and compress the disposal, it is used
Bulldozer Komatsu D155A or others of the same class. At first the cover soil will be piled at the dumping area
that has been provided outside the excavation area
outside dumping. The outside the dump is planned to be located in the northern part of the mine location. But if
there is a mined area that has been completed then the “back filling” is performed, which is the hoarding of
cover soil on mined areas. This method will reduce the distance of transportation besides it will also reduce
environmental impact by refilling mined holes, then sown with the top soil prior to the reclamation work.
The overburden excavation location and the location of overburden and top soil dumping area might be seen
on the mining plan map. Specifically for mining roads, the maintenance is performed by using graders, compactors, and
dust controller, in front of the mine area it is performed by using the water truck.
3. Excavation and Removal of Coal Operations Prior to the coal getting or the taking of coal activity
the Coal Cleaning activity is performed, which is to clean the coal surface from non-coal materials such as the
remaining cover soil from the stripping process or insertions betweenin the coal layers and other foreign
materials. The instrument used for Coal Cleaning is the Excavator Komatsu PC-200 or other of the same class which
is equipped with a bucket completed with Cutting Edge. For Coal Getting activity, coal excavation operation is
performed by using Excavator Komatsu PC-200 or other of the same class assisted by bulldozers. For soft to
moderate strength of coal, it will be directly excavated and loaded into dump trucks. For hard coal, first to be
dismantled by using bulldozer Komatsu D155A or D375A or others of the same class, then dug and loaded by using the
excavator. 4. Transportation of Coal to the Stockpile ROM, ROM into
port, or from the pit directly to the port is the activity of transporting coal from the mines Front Loading to the
location of Raw Coal at the Stockpile. The transportation is using Dump Truck Nissan CWB or other of the same class
with capacity of 20 tons. 5. Coal stockpiling
is the stacking of Raw Coal in an area designated for the stockpiling purpose. To set the stack, it is used the
Wheel Loader Cat 966 F and Excavator Komatsu PC-200 or other of the same class.
6. Coal crushing is the process of crushing sizing the coal
7. Coal barge loading is the process of loading the coal into barges