邯郸-涉县段高速公路沿线煤矿采空区地表沉陷的定量预测

Quantitative Predictions of Ground Subsidence for Coal Mine Mined-out Area along Handan-Shexian

煤矿采空区是影响高速公路路基和构筑物稳定的重大安全隐患。运用概率积分法的理论和方法计算了青岛-兰州高速公路邯郸-涉县段北八特采空区地表沉陷量。计算结果表明，不论是煤层回采后的最大沉陷量、水平位移、水平变形、斜率和曲率等各项变形指标，还是现今各项剩余变形指标都超过了我国高速公路路基变形容许值，特别是K123＋350～K123＋900段以及K124＋500～K124＋900段地表剩余变形量大，对拟建高速路基和构筑物影响严重。

The mined - out area is a great safety hidden trouble that infulences the stability of freeway roadbed and its buildings. The ground subsidence of Beibate mined - out area was calculated by using the probability integration theory and method. The calculated result shows that every deformation indice including maxium subsidence, horizontal displacement, horizontal deformation, gradient, curvature after coal seam mined and various residual at preesnt are all higher than the admited values of freeway roadbed in China. The ground residual deforamtion in K123 ＋ 350 -K123 ＋ 900 section and K124 ＋ 500 -K124 ＋ 900 section is Especially larger. The ground deforma- tion of mined - out area will seriously influence the highway roadbed and constructions.