Research of deformation law about guide rails under the action of mining deformation in mine vertical shaft

Abstract

To lay a foundation for alleviating the influence of mining shaft deformation (MSD) on the guide rail (GR) and monitoring the shaft deformation state, this paper studies the deformation law and mechanism of the guide rail under the MSD. Firstly, a spring is used to simplify the interaction between the shaft lining and surrounding rock soil mass (SRSM) under MSD, and its stiffness coefficient is deduced by the elastic subgrade reaction method. Secondly, a simplified finite element model is established based on spring element, the stiffness coefficient is calculated by the derivation formula, and its effectiveness is verified. Finally, the deformation law and mechanism of GR are analyzed under different types and degrees of MSD, and the deformation characteristics are studied under the disconnection between the shaft, bunton and guide rail. The results show that the established finite element model can better simulate the interaction between the shaft lining and SRSM, and the calculation efficiency is greatly improved. The guide rail deformation (GRD) has a strong ability to characterize MSD and owns the distinctive feature corresponding to different types and degrees of MSD and the connection state. This research can provide reference and guidance for the shaft deformation monitoring and the maintenance and installation of the GR, and also lays a groundwork for studying operation characteristic of hoisting conveyance under MSD.

Research on operation characteristics of hoisting conveyance under mining deformation action in mine vertical shaft

“…2 shows a finite element model of GR deformation analysis under MSD. The calculation parameters, modeling process and model validation are described in [20,21]. The deformation result of GR obtained by finite element model is shown in Fig.…”

“…Sun et al [19] simulates the interaction between pipe and soil by using CONBIN39 spring element and confirmed its reliability. Zhao et al [20,21] simplified the mutual effect of shaft and SRSM through COMBIN39 element and validated the simplified method effectiveness by simulation and experiments. The above study demonstrates the effectiveness of the spring element to simplify the mutual effect of shaft and SRSM under MSD.…”