PROBLEM ON COAL DEVELOPMENT AND UTILIZATION AND ENVIRONMENTAL PROTECTION

In 1990 ,smog and dust emission in China reached 13. 24Mt,SO₂ emission was as much as 14. 95Mt, 80%-90% of which came from coal combustion. About 200Mt of coal waste are disposed annually, and the overall stockpile totals over 1. 5Gt,which has occupied more than 86. 71km². For a large or medium-sized coal mine, the coal/water rate is on average 1 :4 in tonnage . 30Mt of toxic waste water come from coal preperation plants annually. On average,the land susidence area for producing 10 OOOt of coal by underground operation in flat areas is up to 2 000m². All of these have been changing the geological environments and influencing the production activities even human life. So,it is really necessary to produce the needed environment-related maps and to investigate toxic elements in coal during a coal exploration and geological survey, such as the americans are doing today.