高速公路与下伏煤矿采空区的长期稳定性分析

Long-term stability between freeway and gob of coalmine

针对某高速公路下伏煤矿采空区的实际勘察资料,使用有限元数值模拟方法对该高速公路下伏煤层随采矿过程的变化规律进行了研究;模拟了煤层开挖前后整个岩体中的应力、应变状况及塑性区变化规律;分析与评价了该高速公路修建后煤矿采空区的应力与变形的特征,并对采空区的长期稳定性进行了评价预测。结果表明,该高速公路下伏的采空区变形尚未完成,必须采取相应控制措施。

Based on the actual data of the exploration about the gob of a coalmine, the variety rule of the coal beds below the freeway is studied by the using of FEM during the process of coal mining. The status of the stresses and strains, and the varieties of the plastic area are simulated in the whole rock mass. The characters of the stresses and deformation of the gob are analyzed and evaluated after the freeway is built. The long-term stability of the gob is predicted. As a result, the deformation of the gob under the freeway has not been finished yet, and the relative measures must be taken.