Theoretical and technological conception of the fluidization mining for deep coal resources

The depth of coal mining increases continuously owing to the exhaustion of the shallow coal resources. How- ever,the technical difficulties which occur during deep coal mining cannot be solved well by using the traditional theo- ries,such as mining science and mechanics, because of the limit of the deep geo-environment and critical mining depth. Therefore,to implement deep coal mining with a green,safe and efficient way will meet serious challenges. Ac- cording to the trend of the exploitation of deep coal resources,a disruptive idea,the fluidized mining of deep under- ground coal resources,was presented in this paper. The definition,goals and meaning of the fluidized mining were also proposed. The multi-coupled field model and the visualization theory for multi-mechanism of stress-temperature-chem- istry-microorganism were established. The physical,chemical,biological mechanism of coal fluidized transformation was interpreted. A series of disruptive theories and technologies,such as physical fluidized mining including exploitation, separation,filling,electricity and heat generation,gasification,the fluidized mining of chemical transformation,the flu- idized mining of bio-degradation,the fluidized mining of physical grinding,were established. Afterwards,the strategic implementation routine of “2025 basic research,2035 technological breakthrough, and 2050 integrated demonstra- tion”,was put forward. The disruptive revolution of deep coal resource exploitation,including the implementation of deep coal resource integration mining for exploitation separation and filling with unmanned intellectualization,the for- mation of the theory and technology system for fluidized mining of integrated transformation of heat,electricity and gas, and to reach the green environmental protection goal for coal free ground and unmanned underground mine,will be re- alized.