Study On The Construction Control Technology Of The Tunnel Adjacent To Existing Mined-out Area

With the development of traffic construction in our country, highway tunnel, railway tunnel near gob emerge continuously. How to ensure the safety of construction and operation in the mined region, it had become a new task faced in engineering field. Therefore, this paper regarded the Ming and Qing Tang tunnel of Lou Shao railway expansion renovation project as the engineering background. Based on the construction control technology through the existing mining goaf tunnel main research work was as follows:1. By means of numerical simulation, Establishment of three-dimensional finite element model to calculate, Analysis the deformation around the tunnel caused by excavation of tunnel And the plastic depth and scope of tunnel face and peripheral.2. Using numerical simulation method, research the influence on stability of tunnel during through the open gobs. From aspcts of the displacement around the tunnel, supporting internal force and plastic zone distribution, through comparison and analysis, combining with the actual construction conditions, this paper determined the construction method for the Ming and Qing Tang tunnel.3. According to the engineering features of the Ming and Qing Tang tunnel, this paper summarized the tunnel construction control technology with the goaf near the tunnel. This paper also considered gob treatment, and reinforcement measures. From the above three aspects, this paper provided suggestions guaranting for the smooth construction of this project.