Volume Estimation of Mine Waste using ASTER-GDEM and Google earth
Wakasa, Sachi, A.
Akita University, Japan
Volume estimation of mine waste is important to evaluate the environmental impact due to mining activity, or estimate resources such as rare elements or remnants in the wastes. In most of old mines, their mining rights are unknown, and they don’t have mining data. illegally mines also lest their mine wastes and they don’t know the amounts.
To estimate the amount of mine waste, it is necessary to estimate the old and present topographic surface by precious measuring and boring at the site. But it requires a lot of labor and cost. In addition, illegal mining areas are difficult and dangerous for other residents to step in. On the other hand, the topography around the mine generally consists of a set of mining pit, overburden, tailing dam, and it presents a distinctive topography compared with other natural terrain. ASTER - GDEM is a numerical topographic map covering the world with a spatial resolution of 30 m and can be obtained freely. That is, if the topography is 30 m or more, it can be analyzed. Many of the mining areas are large scale artificial topography and can be applied. On the other hand, google-earth can acquire visible images that cover the whole world for free. Therefore, in this research we tried to estimate the amount of mine waste using ASTER-GDEM and google-earth. The survey area was Bor mine area in Serbia and the obtained values &zwsp;&zwsp;were compared with the actual mine records.
The volume of open pit, overburden, tailing dam obtained from ASTER-GDEM and google earth were compared with mining data provided by mining companies, boring data provided by mining laboratory, and high precision DEM obtained by UAV-SfM. There are errors from 20 to 250%.
Although this method has some errors, it is possible to put a certain extent on the amount of the mine waste in a place such as an unexplored area or a place where it is difficult to enter foot so far.