Abstract:With the rapid development of national traffic construction, tunnels in linear projects such as railway and highway will inevitably pass through the goaf. The displacement and deformation of the overlying rock mass in the goaf directly affect the overall stability of the existing tunnel structure. If the goaf settlement is too large, it will lead to the cracking of the tunnel lining, the falling of the block and the subsidence of the road surface, seriously endangering the traffic safety. This paper gives a comprehensive review on the research progress of goaf diseases in coal mines under tunnels, and makes an in-depth analysis of the existing research work on the basis of affirming the previous research results, and analyzes the existing problems and limitations. Based on the current economic and technical level, combined with the engineering practice, this paper makes a technical outlook on the detection means, generation mechanism, and treatment methods of the goaf diseases under existing tunnels.