研究目的:田德铁路在右江盆地中通过小龙煤矿采空区，其稳定性对铁路走向影响较大。文章通过分析 和评价采空区的稳定性，为铁路地质选线提供重要的参考依据。
研究方法:通过对采空区的地质状况、开采情况及地表变形进行详细的调查和观测，并参照有关理论对采 空区进行稳定性检算，分析和评价采空区的稳定性。对3个线位方案进行比较，提出合理的方案设计方案。
研究结果:小龙煤矿采空区地表变形明显;处于移动和变形的活跃期，预计最大下沉量约为1. 61 m。
研究结论:采空区稳定性较差，工程处理难度大，费用高，建议线路绕避采空区，推荐投资较省的CK方案 为贯通方案。
Research purposes: Tiandong-Debao Railway is located in Youjiang Basin，passing through the depletion region of Xiaolong Mine and the stability of depletion region is crucial to the route selection of the railway. The analyses and evaluation of the stability of the depletion region are made in this paper for the purpose of providing reference basis for the geological route selection.
Research methods: Through making investigation and survey of the geological conditions of depletion region, exploitation of coal and surface deformation in details, the calculation, analysis and evaluation are made for the stability of depletion region with the theory, and the rational design program is proposed based on making comparisons among three programs of route selection.
Research results: The surface deformation of depletion region is big, the depletion region is in the active period of movement and deformation and the max. estimated subsidence value will be 1 .61 m.
Research conclusions : The stability of depletion region is very bad. If treating it , there are lots of difficulties and it needs lots of money, so the proposals are made that the railway should keep away from the depletion region and the CK Program should be adopted，which can save lots of cost.
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