Research on Gas Control and Sheet Support Control Technology for Soft and Protruding Coal Seam Working Face
Gas outburst prevention treatment is carried out on soft coal seams with low permeability and high gas content.Water pressure punching technology is used to improve coal quality and monitor its effectiveness.From the monitoring results,it can be seen that the gas content in each borehole gradually decreased and the stress remained stable after hydraulic punching.At the same time,the maximum gas content decreased from 23.9 m3/t to 5.525 m3/t,and the anti outburst effect was significant.The grouting technology is used to reinforce the coal seam with a reasonable ratio of grouting materials.From the on-site photos,it can be seen that the coal seam has a good bonding effect after grouting,and the grouting reinforcement effect is good.
hydraulic punchingrelieve pressure and increase transparencywall cavinggrouting reinforcement