New idea of coal mining:scientific mining and sustainable mining capacity

Aiming at the current status of coal problems in China,this paper put forward the concept and connotation of coal mining and capacity of coal mining.Scientific coal is to maximally obtain natural resources on the premise of the harmonized geology and ecological environment under the guidance of outlook of scientific development,and to achieve sustainable with safety,high efficiency,green,economy and social harmony on the premise that hazards posed by complicated geological conditions and engineering circumstances were controlled;sustainable capacity of coal refers to the maximal coal capacity using safe,high-efficient and environment-friendly method on the premise that the reserves for sustainable within certain period were guaranteed,mainly including three requirements:safe mining,green and high-efficient mining.Accordingly,innovatively proposed the assessment index system and standards of the sustainable capacity of coal which are comprised of safety level,green level and mechanization level and makes comparative analysis of the current sustainable capacities of coal of the five coal production areas in China,the whole China and the advanced coal countries in the world.The results show that the coal capacity in 2010 scores 42.58 on average,and the coal output which complies with the stantards of the sustainable capacity of coal and scores over 70 is about 1.078 billion tons,accounting for only 33.27% of the overall coal output;while the sustainable capacities of coal of the advanced coal countries like the United States of America,Australia,Britain and Germany score over 90.There is still a big gap between the coal in China and that in the advanced coal countries in the world,so China should extensively disseminate the idea of scientific coal and sustainable capacity of coal mining,insist on scientific coal mining,and raise the scientific level of coal in an all-round manner.