High-rank coal reservoirs affect coalbed methane production by being sensitive to changes in velocity and stress. The experiments on Sihe No. 3 coal seam showed that high-rank coal can lose up to 50% of its permeability due to velocity sensitivity, and up to 62.1% due to directional flooding. Stress sensitivity can cause a decrease in permeability of 20% to 50% when the net confining pressure increases. This damage is irreversible, with permeability not returning to its initial level. Reservoirs with lower permeability are more sensitive to stress. To maximize coalbed methane production, a continuous, slow, and stable approach is recommended, especially in the initial stages.