Dec 20, 2014
As one of the natural mining resource, coal has heterogeneity and high complexity.
A number of exp... read more
There are 2 theories that describe the occurence of coal :
In-situ Theory : Coal is shaped from p... read more
Through observation of several compounds and elements that were shaped during coalification, there a... read more
Coal is a solid hydrocarbon compound that is found in natures with a complex composition.
The main ... read more
Coals can be easily find in its precipitation areas because it is usually exposed on the ground's se... read more
Classification of natural resource and coal reserve geologically determine the borehole distance or ... read more