Author(s)

Weihu Yu ¹, Haijun Li ¹, Yudong Li ¹, Yaojiang Liu ², Qian Che ², Rongjian Li ³, Guobing Wang ³

Affiliation(s)

¹ Railway Operation Company of Shanxi Lu'an Mining (Group) Co., Ltd, Changzhi, China
² China Railway Xi'an Survey, Design and Research Institute Co. Ltd, of CREC, Xi'an, China
³ Xi'an University of Technology, Xi'an, China

Corresponding Author

Rongjian Li

ABSTRACT

Due to the railway construction being ahead and the mining work being behind, it is inevitable for some mining areas to pass under the railway. For the 2311 mining working face across under section from DK3 773 to DK4 773 in Tunliu Special Railway, based on Beidou positioning system, a real-time online monitoring and analysis system was established to monitor the non-uniform deformation of the existing railway above coal seam during the mining process of the 2311 working face. According to the monitoring results, the distribution law of uneven settlement deformation of the existing railway roadbed was analyzed when the mining face approached and passed through under the railway roadbed. The analysis results show that as the distance both the track channeling and the belt fluting from the existing railway gradually decreased, the settlement change rate of the existing railway roadbed above the goaf showed an initial increase, then a decrease, and finally tended to a stable value. The influence range of the track channeling alignment distance on the existing railway subgrade was greater than that of the belt fluting alignment distance on the existing railway subgrade. The vertical displacement of the goaf conformed to a higher order polynomial relationship with time, and this mathematical equation could accurately predict the uneven deformation of the existing railway roadbed above the goaf for a period of time in the future.

KEYWORDS

Mining working face, existing railways, track channeling alignment distance, belt fluting alignment distance, deformation monitoring

CITE THIS PAPER

Weihu Yu, Haijun Li, Yudong Li, Yaojiang Liu, Qian Che, Rongjian Li, Guobing Wang, Effect of Step by Step Approach of Underground Mining Working Face on Subgrade Deformation of Existing Railway. Journal of Civil Engineering and Urban Planning (2023) Vol. 5: 61-68. DOI: http://dx.doi.org/10.23977/jceup.2023.050808.

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