Abstract: In response to the difficult problem of cutting and retaining roadway on thick sandstone roof, the research and application of non-pillar mining technology with automatically formed roadway on thick sandstone roof are carried out using numerical simulation, on-site testing, and other methods, taking Zhujiamao Coal Mine in Yuheng Mining Area as the engineering background.In order to ensure timely and sufficient collapse of the thick sandstone roof, an instantaneous expansion rock breaking technology and a method for controlling the collapse and expansion of the thick sandstone roof have been developed to replace explosives.This has achieved effective pressure relief and balanced control of the surrounding rock of the thick sandstone roof in the near field.The monitoring data of mine pressure shows that after adopting the comprehensive roofcutting technology of thick sandstone, the deformation of the surrounding rock of the retained roadway is relatively small, which can meet the requirements of mine safety production; the weighting strength decreases compared to the middle and uncut sides of the working face.The research results have a certain reference value for Yuheng mining area and the mines with similar roof conditions in Shaanxi, Shanxi and Inner Mongolia.