基于双沿空留巷的采空区相邻巷道围岩结构特征研究

Study on the structural characteristics of surrounding rock of adjacent roadway in goaf based on double gob-side entry retaining

巷道稳定性是矿山安全生产的关键因素之一。本文针对双沿空留巷的巷道布置方式,通过对4502采空区及4503工作面邻近巷道应力场、位移场的监测与分析,探究工作面回采过程对采空区相邻巷道围岩应力分布及位移沉降规律的影响。结果表明:工作面回采对巷道应力场重组具有显著作用,尤其是在工作面近区域。监测数据揭示了工作面回采对巷道围岩应力场的显著影响,尤其是位于工作面附近的巷道,其位移沉降量波动性强。4503轨道巷由于两侧垂直应力分布较为均匀,其位移沉降量相对较小,而4503胶带巷与原4502轨道巷因围岩性质差异,在未开采区一侧的位移沉降量明显大于采空区一侧。本研究旨在理解和预测工作面回采对巷道稳定性的影响,为矿山工程提供实践意义。

The stability of the tunnel is one of the key factors for the safe production of the mine.This paper focuses on the tunnel layout of double along-air stay,through the monitoring and analysis of the stress field and displacement field of 4502 Goaf and 4503 Working Face and there neighboring tunnels,to explore the influence of the mining process of the working face on the distribution of stress and displacement pattern of the surrounding rock of the tunnel.The results show:workface mining has a significant effect on the reorganization of the stress field in the tunnel,especially in the near area of the workface.The monitoring data revealed the significant impact of workface return on the stress field of the tunnel perimeter rock,especially in the tunnel located near the workface,where the displacement settlement is highly fluctuating.The displacement and settlement of 4503 Railroad track is relatively small due to the uniform vertical stress distribution on both sides,while the displacement and settlement of 4503 Tape Road and the former 4502 Railroad track is obviously larger than that of the mining side due to the difference in the nature of the surrounding rock in the unmined area.The aim of this investigation is to understand and predict the effects of workface reclamation on tunnel stability and to provide practical implications for mine engineering.