Introduction

Efforts to control loss and dilution in coal mining activities can be carried out by:
1) Use of a digger with a bucket capacity adjusted to the thickness of the coal seam.
2) Good mine drainage planning and implementation.
3) The height of the exposed coal is adjusted to the reach of the digging equipment.
4) Coal mining must be parallel to the work space (loading point) or the road.
5) If the condition of the coal contains coal banded (coal seams with lots of irregular parting inserts) which is expected to affect the quality, the coal banded can be disposed of by digging equipment.
6) If there is a layer of parting >5 cm in the coal, the parting must be removed and the coal under the parting >5 cm must be cleaned again.
7) If there is a parting layer <=5 cm in the coal, the parting can be combined with coal provided that the quality of the coal seam above and below the parting is the same. 8) If the hardness of the coal during the demolition process requires an excavator bucket teeth or ripping by a dozer, do not dismantle parts >5 cm in the coal.
9) If loading coal using an excavator teeth bucket, do not dismantle the coal floor layer.

Story

he early history of the discovery of coal mines in Indonesia began in 1846 in Pengaran, East Kalimantan, which had reached the stage of exploration. In 1880, it was also discovered in the Durian River, West Sumatra. The discovery of the next coal mine occurred in 1888, in Pelarang Samarinda, East Kalimantan. The next discovery in historical records occurred in 1919 in Tanjung Enim – Bukit Asam, South Sumatra.
The history of the regulation of mineral and coal mining is divided into 4 phases, namely the Colonial Age, the Old Order phase, the New Order phase and the Reformation phase. In the colonial era, there were regulations that would later be used as a legal basis for mining and coal, namely Indische Mijn Wet 1899. In the IMW, Articles 5 and 5A state that there are two relationships in carrying out mining and coal business activities, namely concessions and contracts.

Conclusion

coal activities get coal into the stockpile
ROM and coal that will come out of the ROM stockpile based on Weighbridge calculations

Land Clearing

Land clearing can be interpreted as an activity of clearing coal mining land from forest materials which include trees, shrubs to reeds. In general,
coal mining activities always begin with clearing the concession area to be mined.
Variables that affect land clearing work are: Types of trees that grow, Conditions and soil carrying capacity, Rain Topography and also weather changes.

PT Minemex Indonesia’s land clearing process took place in our concession area in Dusun Tebat village, Mandiangin sub-district, Sarolangun district.
Using a ripper bulldozer, the mining area is cleared from shrubs to large trees. In general, it takes time according to the area of ​​land to be mined

Waste Removal

In this third stage, the transfer of land (soil) is intended to save the land from being damaged so that it still has original soil elements,
so that this land can be used and replanted during reclamation or re-greening activities. Overburden can be stockpiled in two ways,
namely backfilling and direct backfilling. Overburden that will be used as backfilling material will usually be stockpiled in a temporary stockpile when a new mine is opened
and will be transported back to the mined out area.
This activity is intended so that the ex-mining pits do not leave large holes and can be used for post-mining land rehabilitation.

Stripping overburden & Parting

Using an open pit mining system, stripping overburden is an activity that absolutely must be carried out in mining.
The overburden stripping activity is determined by the production target plan, the better the design for overburden stripping, the better the production target plan.
To realize these conditions required methods and tools that support the stripping of overburden.
Implementing an environmentally friendly and efficient mining process, the company continues to reduce the stripping ratio through a careful planning process and measurable execution.

Spreading

Reclamation and post-mining activities are an inseparable part of mining activities.
Reclamation is an activity carried out throughout the stages of the mining business to organize,
restore and improve the quality of the environment and ecosystem so that they can function again according to their designation.
PT Minemex Indonesia as a company that implements good mining practices and is committed to preserving the environment has implemented reclamation efforts
through planning stripping and post-mining processes.
This is done to mitigate all impacts on the environment originating from the Company’s operational activities

Coal Houling

Materials in large quantities in the mining industry are transported by haulage (horizontal removal of earth) and hoisting (vertical removal of earth). Some of the parts of this transport include:
Transportation of coal from the mining area to the stockpile.
Transporting coal from the stockpile to the port/jetty followed by the transshipment process.
Transportation of waste/overburden to the location of the waste dump/dump area (either in the form of topsoil/humus or overburden).
PT Minemex Indonesia’s hauling process begins with the transportation of coal getting from the mining pit to the Jebak and Talangdukuh stockpiles via a dedicated hauling road of 14 – 160 km. Hauling activities then proceed to port transshipment