本文对美国俄亥俄州东南部的国家级高速公路下,采用长壁开采法开采三个采区后的下沉剖面进行了监测研究。从研究结果得知:平均最大下沉值为1.07m,平均最大压缩变形值为0.008 mm/m。并对确定水平位移和变形值的三种预计方法进行了比较。这三种方法是:英国国家煤炭局(NCB)图解法、下沉剖面法(采用适合于俄亥俄州东南部地区的经验常数)及有限元法。由比较结果可看出用剖面法估算得的下沉值最符合实际,而用有限元法确定的变形值最为合理。 In this paper, we monitored the subsidence profiles of the three mining areas under the longwall mining method under the state-level expressway in the southeastern Ohio of the United States. The results show that: the average maximum sink value of 1.07m, the average maximum compressive deformation of 0.008 mm / m. Three predicted methods for determining horizontal displacement and deformation are compared. These three methods are the NCB graphic method, the subsidence profile method (using empirical constants suitable for the southeastern Ohio area), and the finite element method. It can be seen from the comparison results that the subsidence value estimated by the cross section method is the most realistic, and the deformation value determined by the finite element method is the most reasonable.