Cutting Seam Design and Study of Gob-side Entry Retaining by Roof Cutting and Pressure Relief

For the pre-splitting cutting seam design of gob-side entry retaining by roof cutting and pressure relief at Halagou Coal Mine 12201 working face, to ensure to cut off roof stress transfer, as well as smoothly cutting down the roof to be a roadway, this paper, through the theoretical calculation combining with engineering practice, designed cutting seam height of roof and cutting seam angle, and used numerical simulation test to confirm the most reasonable cutting height and cutting angle. Through the field test, we obtained the most reasonable borehole spacing and thus confirmed the most reasonable cutting seam design for roof cutting and pressure relief gob-side entry retaining of Halagou Coal Mine.