STUDY ON THE ENCAPSULATION TECHNOLOGY TO CONTROL THE ACID MING DRAINAGE
The purpose of this study is to develop the technology which prevents the acid ming drainage and the contaminations due to surrounding rock wastes for mine cavities generated by mining developments. To achieve the goals, encapsulation studies on the sulfide minerals existed in the mine cavities will be executed as one of the source control water contamination preventing technology to suppress the acid ming drainage development.
For the source control, from the results of rice meter tests for applying calcium silicate as encapsulation liquid, specimens from 4 other zones maintain the encapsulation effects after 3 months (Most specimen of calcium silicate 1M and 0.5M increase from pH3 to pH6-7.). Increasing effects of pH have been confirmed through encapsulation, and encapsulation effects based on proper particle size were increased.
Liquid using calcium silicate has been developed as the encapsulation liquid to suppress the acid ming drainage development and process which applies this liquid to mine cavities and mine waste dumps has been established. Also, from encapsulations, pH increasing effects and decreasing of Fe and sulphate were confirmed. From these results, it is judged that 1M (mole) of liquid is the liquid which can be applied to the mine cavity and mine waste dump.