Development of a Novel Directional Hydraulic Flushing Technology for Enhanced Gas Drainage in Soft and Low-Permeability Coal Seams
Although directional drilling technology is extensively employed in underground coal seam gas drainage, its efficiency remains limited in soft and low-permeability (SLP) coal seams due to their poor gas flow properties. To address this, a novel directional hydraulic flushing technology is introduced in this work. Bas...