Abstract: Along the second grade road from Taiyuan to Gujiao,there are twenty kilometers passing the coal series' layerzone of shanxi and Taiyuan groups of Taiyuan basin,where many small coalpits spread.The collapse of these small coalpits dose great harm to the construction of the road and bridges.Through analyzing the stability of the mined-up region,this paper proposes injection and geotechnical cellular as a join slab method to make sure the safety of the road and bridges during their lives.

Key words: basin, layerzone, small coalpit, collapse, mined-up region

摘要： 太原古交二级公路中,有2 0km路线经过太原盆地太原组和山西组煤系地层,这一带地表浅部的小煤窑星罗棋布.小煤窑的塌陷对公路、桥梁建设危害较大.经过对采空区的稳定性分析,提出注浆和土工格室搭板法等治理方案确保公路桥梁运行安全.

关键词: 盆地, 地层, 小煤窑, 塌陷, 采空区