高速公路下煤矿采空区变形分析及其治理

Deformation analysis and treating measures to gob areas of coal mine under freeway

在奉节至巫溪高速公路沿线煤矿采空区工程地质调查的基础上,论述了公路沿线煤矿采空区地质、采矿、采空区等特征,并对沿线煤矿采空区对桥梁、隧道、路基等构筑物的危害程度进行分析与评价。结果表明,该高速公路下覆的煤矿采空区变形尚未完成,采空区所引起的地表变形将对寂静特大桥、惠家湾隧道、喜口池隧道施工及运营有显著影响,必须采取采空区注浆工程治理措施。

Based on the engineering geologic survey of the gob area of coalmine under a freeway, the character of the geology, mining and gob area along the road are discussed. According to calculated remaining deformations of the gob area under the freeway, the result shows that the remaining large deformations are in the gob area, the max remaining deformations reach to 146 mm, and the deformation caused by the gob area would greatly influenced the construction and operation of Jijing great bridge, Huijiawan tunnel and Xikouchi tunnel, so, the management measures of grouting from the ground or in the tunnel should be taken.