Abstract
PT. Pipit Mutiara Jaya is one of the companies engaged in mining, especially
coal. The company is located in Bebatu Village, Sesayap downstream, Tana Tidung,
North Kalimantan Province. PT. Pipit Mutiara Jaya is applying an open pit system
and is currently engaged in mining and exploration activities. The area exploration
is called Pit CFG. After the company undertook detailed exploration activities the
company has not conducted data processing to determine the quantity of measured
coal resources, the value of stripping ratio, and the design pit at Pit C PT. Pipit
Mutiara Jaya.
Coal exploration was conducted on coal seam with research area + 24 ha.
The information used in estimating the measured coal resource in the study area
came from 146 drill hole data and the mean distance between 50 meter drill holes
with the average depth of 60 meter borehole. Result of calculation of coal resource
by using method of polygon in mining software. Total of overburden is 12.488.344
bcm which consist of amount of overburden, mud and the consecutive amount of
mix material is 3.309.185 bcm, 6.119.439 bcm and 3.059.719 bcm then total coal
tonnage is 1.296 .445 tons consisting of 101B1 866.901 ton and 101H 429.544 tons
of seam and the stripping ratio is 1: 9,63.
Keywords: exploration, coal, mine, drill, resource, polygon, overburden, seam,
stripping ratio, pit