Analysis of mining roadway with large deformation of broken soft coal and research on supporting technology: A case study in Xin’an coal mine, China

•We proposed a new support plan and conducted field tests.•Broken surrounding rock, low degradation strength, unreasonable support parameters, and uncoupling of support and surrounding rock were the main causes of roadway deformation.•The active–passive coupling support scheme had an amplifying effect.•The deformation of the roadway surrounding rock was effectively controlled and the scheme could ensure the stability of the roadway.