Drainage and mining management and control method based on dynamic change rule of permeability of coal reservoir in drainage and mining process

The invention discloses a drainage and mining management and control method based on a dynamic change rule of permeability of a coal reservoir in a drainage and mining process. The drainage and mining management and control method based on the dynamic change rule of the permeability of the coal reservoir in the drainage and mining process is characterized in that different bottomhole flowing pressure reduction rates are designed by adopting an oil reservoir pressure speed reduction tentative analysis method, data is collected in the drainage and mining process, and the permeability of the coal reservoir is inverted in the drainage and mining process; the damage degree of the permeability of the coal reservoir is compared and analyzed under the condition of the different bottomhole flowing pressure reduction rates, so that the optimal drainage and mining management and control method of a coal-bed gas well is determined. Fewer parameters are adopted in the drainage and mining management and control method base