Study on evolution of seepage law of coal body under the action of thermal-force coupling
Energy is the intrinsic foundation of social development.However,as coal resources enter deep mining,mine safety is facing serious challenges.When deep mining,the coal body is in the complex geological conditions of"high geostress""high osmotic pressure"and"high temperature",and the evolution law of coal body permeability under this geological conditions is determined by the joint in-fluence of multi-phase coexistence and multi-field coupling.The permeability of the coal body directly affects the safety of coal mining.In order to investigate this problem,this paper analyzed the interactions between temperature,deformation and matrix-fracture,and then constructed a model to characterize the permeability of the coal body under the thermal-force coupling,and finally verified the accuracy of the model.This model is not only an important theoretical basis for studying the gas transport law of multi-phase multi-field coal seams,but also an important theoretical basis for coal seam gas management.In order to provide theoretical basis and technical guidance for the study of multi-field coupling gas transport and coal seam gas management.
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