针对处于相对平衡状态的废弃采空区上覆围岩重新“活化”,使裂隙带岩体再压密、地下残留空隙再冒落,导致地表产生二次沉降的问题,通过对采空区上方铁路动荷载作用稳定性综合评价,得出采空区上方围岩、地层的二次沉降问题.通过GTS建立模型分析,得到采空区上方地表的下沉曲线,由此对铁路安全性给予评估.
Based on evaluation of rail dynamic load effect on goal stability, such problems caused by waste goaf overlying rock activated as compacted rock fracture zone, caving of un- derground residual voids and the generation of secondary subsidence are studied in the paper. The surface subsidence curves on the top of goaf are given on GTS model analysis. Then the safety of railway is evaluated.