Calculating coal reserves using the vertical section method can describe the condition of
deposits and overburden in each section. This study aimed to determine the direction of coal …

This research was conducted at one of the national companies engaged in coal mining. The
Mining Business Permit (IUP) area in Bulungan Regency, North Kalimantan Province, has …

Coal deposition results in the formation of continuous layers with specific thicknesses and
slopes. This study aimed to determine coal seams based on drilling data. The method …

The chemical composition of coal is almost the same as that of plant tissue, containing the
main elements of elements C, H, O, N, S, and P. An in-depth study of coal inorganic …

Coal is a non-renewable energy source and has a role that almost competes with petroleum.
In this connection, it is necessary to explore and inventory coal resources. One of the …

A force inside a pipe drains fluid from wells producing oil and natural gas. When the power
works exceed the pipe's maximum resistance limit, it will cause deformation in the line. This …

The environmental influence of coal mining activities is one of the changes in soil quality, air
quality and surface water. Therefore, this research was carried out to find out whether mine …

Air asam tambang (AMD) merupakan salah satu masalah lingkungan yang terkait dengan
penambangan bijih besi. Dalam lingkungan berair, mineral sulfida tertentu dalam batuan …

Coal is a non-renewable energy source and has a role that almost competes with petroleum.
In this connection, it is necessary to explore and inventory coal resources. One of the …