Abstract:

In the underground mining, local geological factors such as tectonic faults causing loss of seams, kast caves, rock partings… are identified particularly by geological exploration drilling work. In order to locate the coal seam in case of loss of seams, the exploratory excavation and/or drilling are mostly applied to determine the coal seam, so this work increases significantly the production cost. At Mong Duong coal Company, in the process of constructing the level gallery along the L7 seam, -250 level encountered hard rocks, in spite of digging 50 meters, the seam was not still found. This paper proposes a method of using Ground Penetrating Radar (GPR) which is popular in the world, especially in civil and industrial construction and guiding mineral exploration with high efficiency, to assess the applicability of geophysical methods in predicting construction conditions in front of the level gallery along the L7 seam, at the level of -250 m. The results of none detected lost seam in the experiment in the distance of 10- 50 meters in front of heading face at the level gallery along the L7 seam, -250 level, in Mong Duong mine shows the good application of the geophysic methods in predicting the geological conditions when underground mine heading and exploitating in Quang Ninh.