The coal mine goaf prevention technology of Xi'an CCTEG has been successfully applied in the field of high-speed railway construction for the first time 13 Oct 2020


On September 24, Railway Engineering Consulting Group Co., Ltd. organized a review meeting of the project results of the “Evaluation of Coal Mining on the Stability of the Newly-built Tongluoshan Tunnel in Chengdawan Railway” undertaken by the Xi'an CCTEG in Beijing. Leaders of RECGCL attended the meeting to guide, experts from Railway Engineering Consulting Group Co., Ltd., CCTEG China Coal Research Institute, Shanxi Transportation Planning and Design Institute, Chongqing CCTEG, Xi’an University of Science and Technology and other units performed the project results after careful review and questioning, they agreed to pass the review.


The Chengdawan High-speed Railway is an important part of "Eight vertical and eight horizontal" in the "channel along the river". The design speed is 350 km/h. Construction is expected to start in 2021. The Chengdawan High-speed Railway Tongluoshan Tunnel has a total length of 4610m and a maximum buried depth of about 420m. But multiple coal mining activities from north and south sides pose a safety threat to the newly built railway tunnel. Since July 2020, Liu Xiaoping, an associate researcher of  Xi’an CCTEG, has led a technical team to carry out detailed geological surveys and mapping.The team carried out numerical calculations and mechanical analysis under various unfavorable conditions such as residual deformation of the goaf, seismic load and dynamic train load, they  studied the construction of high-speed railway tunnels in coal mining strata,as well as the settlement standards and control technology during operation, technical consultation and their service work have been completed with high quality.


The project’s research results passed the review, marking the first successful application of Xi’an CCTEG in the field of high-speed railway construction, laying a good foundation for the application and promotion of this technology in the high-speed railway construction market.