Formation Density Logging – Coal Blasthole Logging

by | Borehole Wireline, Wireline Logging

BLASTHOLE LOGGING IN COAL

BLASTHOLE LOGGING IN COAL PROJECT & GOALS:

Identification of coal seam parameters (density, top boundary, bottom boundary and partings) within pre-split blastholes prior to blasting.

BLASTHOLE LOGGING IN COAL DATA SETS:

Gamma, dual spaced density, borehole diameter and magnetic deviation data are acquired, rapidly and cost effectively in blastholes

Data in entered into the mine modelling package before blasting so the blast programme can be modified with the updated geological data.

BLASTHOLE LOGGING IN COAL DATA COMMENTS:

The geophysical density data provides accurate data on the coal seam parameters and distribution. In this example the geophysical data has been displayed as a section showing proximity of an intrusion which has changed the coal seam physical properties. The resulting burnt coal is not a mineable commodity and the blast programme was adjusted accordingly.

BENEFITS:

Integrating operational blasthole data into a mine modelling package significantly improves geological modelling which leads to improved coal predictions, improved structural interpretations including fault prediction, detailed mapping of heat affected areas and better positioning of the coal roof location.

REFERENCE:

“Integrating blastholes into exploration data to improve coal recovery and modelling”

Helgi Stedman 2014, 9th International Mining Geology Conference, Adelaide, South Australia.