摘要:研究目的:铁路工程采空区问题是影响线路方案及运营安全的关键问题，目前对其稳定性的评价仍以经 验公式法为主，但由于该法只能对稳定性作一个粗略的定性判断而不能预测围岩变形特征，且计算结果相对 粗略，因此具有一定局限性。MCe/GTS三维数值模拟法可以模拟特定的地质条件及开采状态，可预测开挖 后的变形特征。本文结合这2种方法综合研究采空区的稳定性及变形问题，以期结果更能反映工程实际、更 准确且工程作用更大。研究结论:( 1)确保玉磨铁路运营安全的道班河铜矿采空区顶板岩层厚度为35. 25 h，小于铁路线位附近 采空区顶板岩层厚度，线位附近因采空开挖引起的地表变形量几乎为0,铁路从现有位置通过不受采空区影 响；（2)2种方法研究所获结论一致且2种方法相互验证、相互补充，研究结果更准确可信；（3)本研究成果可 直接服务于玉磨铁路工程，研究方法也可为同类工程采空区稳定性评价提供借鉴。

Abstract:Research purposes： The problem of mined out area in railway engineering is the key problem to affect the route scheme，construction and operation safety. The evaluation of the stability of mined out area is still based on the empirical formula. But because it can only be a rough qualitative judgment and can not predict the specific deformation characteristics，and the results also appear relatively rough，it has some limitations. Midas/GTS finite element analysis software can simulate the specific geological conditions and mining conditions， which can predict the deformation characteristics after excavation. Therefore， combinate both of them to research copper mine goaf stability and deformation. The results can reflect the actual，more accurate and more engineering role. Research conclusions:(1) The mining goaf roof rock thickness which make sure railway operational safety is 35. 25 m less than rock thickness near railway line， the surface deformation near the line is almost 0， the railway is in safe condition from the existing position. (2) The 2 methods are validated and complemented with each other，and the results are consistent. The results are more accurate and credible. (3) The research results can directly serve Yuxi - Mohan railway engineering，research method also can be used for the similar engineering stability evaluation of mined out area.