Exploration and exploitation in second deep space of crust interior and high efficient utilization of the major energy——coal resource in China

The fossil energy,which includes petroleum,natural gas and coal,is one-off and non-renewable.The energy structure in China is much different from that in developed countries.Petroleum is the main energy in the world,while the coal is the main energy in our country,which is based on the dominant resources and the characteristic in the fossil energy structure.With the sustained,rapid and sound development of the industrialization process and the economy in China,the requirement of the fossil energy rises increasingly,thus the exploration and exploitation of coal resource in the second deep space(500~2000m) of crust interior should be enforced at once.There are many difficulties in the exploiting process,especially the complex structures,the physic-mechanic property of the rock,appropriate mechanized exploiting technique,abundant high concentration gas outburst,the high stress state of the substance and the structure,the increasing underground temperature and a great deal of water inflow,etc..It is necessary to actualize synthetical utilization on coal resource,develop the coal liquefaction and clean technique,strengthen high resolution survey,data collect and dynamic monitoring on media rupture process by introducing contemporary science and technology in order to exert the great potential energy of coal resource and bring benefits to the mankind.