Research on the Evolution Law of Coal Micro Pore Structure
By studying the effects of gas and stress on the micro pores of coal,the differences in the effects of adsorbed and non adsorbed gases on the pore structure of coal were revealed,as well as the main and secondary factors affecting the microstructure of coal under stress.Experiments have shown that non adsorbent gases can expand the pore size inside coal,increase the opening degree of cracks,and thus improve the permeability of coal.Adsorbable gases can damage the pore structure of coal,making the pore and fracture structures more complex,thereby enhancing the adsorption capacity of coal.The research results can provide a micro perspective reference for the evaluation and development of unconventional oil and gas resources.
pore structureadsorbable gas N2non adsorptive gas Headsorption effect
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