Laws of Mine Pressure and Surrounding Rock Control of Roof Cutting Non-pillar Mining Method in Qidong Mine

To probe the adaptation of roof cutting non-pillar mining method in Qidong Coal Mine, based on the condition of gob-side entry at 7135 working face in Qidong Coal Mine, roadway deformation used roof cutting non-pillar mining method was systematically analysis by the way of roof borehole TV, tunnel surface displacement and strata behavior monitoring on line. Results showed that entry retaining used roof cutting non-pillar mining method could be divided into four ranges based on its deformation features at 7135 working face. According to the problem of large roof subsidence, roadside expansion, and floor heave. Linear combination anchor cable was used in deformation retardation zone for roof secondary coupling reinforcement, and disc form combination anchor cable was used in advanced support area. Obvious controlling effects in gob-side entry retaining were obtained.