Abstract
Tissue Preservation Index (TPI) and Gelification Index (GI) are products in coal related to the quality of coal and acid water mining. Research is conducted to know the relationship between the two by means of correlation using polynomial method and pressing method on the environmental diagram of the depositional environtment/facies. The correlation result is obtained that the higher the value of TPI, the value of Inherent Moisture and Volatile Matter is lower and the value of ash content and Fixed Carbon is higher. The higher the value of the GI, then the value of ash content and Fixed Carbon is higher and the value of Volatile Matter is getting lower. The lymnic deposition facies are areas that are located far from the sea and covered by a barrier and composed of land sediment with an active hydrological system. This is what causes minimal acidic water to occur because the sea sulfide does not intervene in the surrounding rocks. In addition, high GI value levels in the research area cause the oxidation process to be low and result in low rock acidity conditions.
Highlights
Acid Water Mining is a part of the process of mining where rock acidity is the result of oxidized minerals
The results of this research aims to provide an overview of Tissue Preservation Index (TPI) and Gelification Index (GI) relationship with the quality of coal as well as the acid water related to mine
TPIGI data is further linked with coal quality test result data, while determining the correlation value, used the correlation coefficient according to Sarwono (2006)
Summary
Acid Water Mining is a part of the process of mining where rock acidity is the result of oxidized minerals. It is related to the environment in which the coal is being deposited. Degrees of plant humification or Tissue Preservation Index (TPI) and environmental humidity conditions or Gelification Index (GI) have a relationship in determining the environment of coal deposition and still have an influence on the quality of coal. This research was conducted at Air Laya Mining Area PT. Bukit Asam Tbk, Tanjung Enim, South Sumatera by using a correlation method according to Sarwono (2006). The results of this research aims to provide an overview of TPI and GI relationship with the quality of coal as well as the acid water related to mine
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