Abstract
The annual coal production of Pakistan is about 3,637,825 tonnes which is about 6% of the country's energy resources; out of this 1,241,965 tonnes of coal was produced/mined from the Lakhra coalfield, District Dadu, Sindh which after the Thar coal field is the second largest coalfield of Pakistan. At this coal field more than 58 mining companies are engaged in exploring the hidden wealth of the country. The problem of Acid Mine Drainage, is caused by the passage or seepage of water, through mines where iron disulphides, usually pyrites, are exposed to the oxidizing action of water, air and bacteria, is the main problem faced by the mining companies. The geochemical analysis of acid mine drainage water collected from Indus coal mine No. 6 shows that beside its higher pH, Total Dissolved Solids and Sulphates, it also posses higher amount of heavy metals like Cd, Cu, Pb, Co, Ni, and Fe. This acid mine drainage water not only damages the mine structures but is also harmful to soil and ecology.
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