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