When the expressway crosses the goafs inevitably, the design is generally to build the road on coal pillars as much as possible. However, the existing coal pillars are often unable to meet relevant requirements of highway construction. Combining three-dimensional physical model tests, numerical simulations and field monitoring, with the Urumqi East Second Ring Road passing through acute inclined goafs as a background, the deformation and failure mechanism of the overlying rock and coal pillars in acute inclined goafs under expressway load were studied. And in accordance with construction requirements of subgrade, comprehensive consideration of the deformation and instability mechanism of acute inclined goafs, the treatment measures and suggestions for this type of geological disasters were put forward. The research results confirmed the rationality of coal pillars in acute inclined goafs under the expressway through grouting. According to the ratio of different overlying rock thickness to coal pillar height, the change trend and value of the required grouting range were summarized, which can provide reference for similar projects.

当高速公路不可避免地要穿越采空区时，设计一般是尽可能在煤柱上修建道路。然而，现有的煤柱往往无法满足公路建设的相关要求。结合三维物理模型试验、数值模拟和现场监测，以乌鲁木齐东二环路穿越急倾斜采空区为背景，研究了高速公路荷载作用下急倾斜采空区上覆岩体和煤柱的变形破坏机制。研究过。并根据路基施工要求，综合考虑急倾斜采空区的变形和失稳机理，提出了该类地质灾害的治理措施和建议。研究结果证实了高速公路下急倾斜采空区注浆煤柱的合理性。根据不同覆岩厚度与煤柱高度的比值，总结了所需注浆范围的变化趋势及数值，可为类似工程提供参考。