Study on the Dip Angle Effect of Asymmetric Deformation and Failure of the Gob-Side Coal–Rock Roadway in Gently Inclined Coal Seam

In order to reveal the influence law of coal seam dip angle on stability surrounding rock gob-side coal–rock roadway in a gently inclined (GCRGICS), deformation characteristics under four different angles this kind were studied by field investigation, theoretical analysis and numerical simulation. The results showed that, with increase angle, amount roof subsidence upper lower side arc triangle along interface increased, maximum was 479 950 mm, respectively, slip area gradually shifted from coal. asymmetric became more obvious. rate GCRGICS V-shaped variation relationship when 10°, minimum, only 1.1%. plastic zone expanded new extension range mainly located roadway.