Study on the Effect of Hydraulic Flushing on the Stress and Permeability Variations of Loaded Coal.

Coal seams in China are characterized by low permeability, high gas pressure, and soft coal, which lead to challenging gas extraction and severe gas disasters. Hydraulic flushing is widely used in the field to enhance the permeability of coal seams. Considering this fact, studying its effect on the stress and permeability variations of loaded coal is essential for upgrading the hydraulic flushing permeability enhancement technology.