SIMULTANEOUS SOLUTION OF WASTE ROCK DUMPING IN OPENCAST MINING AND FLY ASH DISPOSAL IN COAL BASED POWER PLANTS - A CASE STUDY

摘要

India ranks third in world coal scenario mainly due to 90% contribution from opencast mining or surface mining technology. The coal produced by opencast mining technology is one of the major inputs to the thermal power plants which caters to the 65% of energy demand of India. Both the above processes generate two kinds of solid waste i.e. waste rock/soil and coal ash respectively. Disposal of these two wastes in a safe, economic and eco-friendly way are the biggest challenges to the both coal mining industry and power plant industry of India. For solving the above problems related to opencast coal mining and coal based power plants, an experimental and research work is carried out by mixing fly ash with waste soil/rock of Sonepur-Bazari opencast mine, located in eastern part of India. The findings on research work carried out by mixing coal ash and waste soil/rock of the external dump (i.e. waste dump outside the opencast mine) of Sonepur-Bazari opencast mine are discussed in this paper.