The impact of tectonic dynamic energy on coal metamorphic process
Ao Weihua1,2, Huang Wenhui1,2, Tang Xiuyi3, Chen Ping3
1. School of Energy Resources, China University of Geosciences, Beijing 100083; 2. State Key Laboratory of Coal Resources and Safe Exploitation CUMT, Beijing 100083; 3. Anhui University of Science and Technology, Huainan, Anhui 232001
The impact of solid mechanics and tectonic physiochemistry on coal was analyzed in the paper from aspects of its source,characteristics and behavior.The energy transformation caused by tectonic dynamic was described based on previous research results analysis.The impact of tectonic dynamic pressure on bituminous coal moleculars' agglomeration process is summarized.The pressure on coal includes compressive pressure,tensile pressure,shear pressure,which are the additional inner force from the overlying formation pressure and tectonic dynamics,and it can be broken down to two parts:tectonic additional hydrostatic pressure and deviatoric pressure.Tectonic additional hydrostatic pressure mainly affects physical properties of coal such as porosity,granule properties and gas absorption and can slowly motivate chemical metamorphism process of coal.Deviatoric pressure prompts deformation and displacement in coal,and a series of energy transformation from kenetic energy to all kinds of heat energy,surface energy,elastic strain energy and acoustic photoelectromagnetism can be found in the process.