C. Changul, Chakkaphan Sutthirat
Acid mine drainage (AMD) is the environmental issue that generates the greatest public concern regarding the mining industry. Thus, characterization of mine waste rock according to acid generation potential is necessary for mining operations to ensure proper waste rock storage and to avoid future adverse environmental effects. Therefore, this study was conducted to estimate the potential of AMD generation in the largest operating gold mine in Thailand by using acid base accounting and net acid generation tests. Representative samples of six types of waste rock classified by mining geologists for mineral processing and waste dumping were collected for this study: volcanic clastic, porphyritic andesite, andesite, silicified tuff, silicified lapilli tuff, and sheared tuff. Under various conditions, experimental results indicate that only silicified lapilli tuff and shear tuff are potentially acid-forming materials. The results indicate that AMD generation may possibly occur a long time after mine closure due to the lag time of the dissolution of acid-neutralizing sources. Acidic generation from some waste rocks may occur in the future based on environmental conditions, particularly the oxidation of sulphide minerals by the combination of oxygen and water. Therefore, a proper design for waste rock dumping and storage is necessary to reduce the risk of AMD generation in future.
@article{9bb84c37-f03f-4e86-a3af-4aa30251b069,
title={Assessing the acidic potential of waste rock in the Akara gold mine, Thailand},
author={C. Changul and Chakkaphan Sutthirat},
year={2009},
language={en}
}TY - JOUR TI - Assessing the acidic potential of waste rock in the Akara gold mine, Thailand AU - C. Changul AU - Chakkaphan Sutthirat PY - 2009 LA - en ER -
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