Numerical Simulation and Inversive Study of Gas Flow Field Around Coal Bed Borehole

摘要

Using bore gas flux inverse analysis gains coal bed gas flow equation on the basis of coal bed gas occurrence and flow theory, gas radial flow differential equation, using large scale finite element analytical software ANSYS analyse the stress of bore, and gain the stress distributing graph of and further analyze the stress had an impact on coal bed air permeability coefficient and the various rule of gas pressure and coefficient of permeability distribution following stress around bore and gas pressure gradient impacts on gas flow. It has real meaning to gas evacuation, coal mine safety design and coal-bed gas development.