运营高速公路下煤矿采深、采厚对路基的破坏影响分析

Effect of Underground Mining Depth and Mining Height on the Damage of Expressway Roadbed

对于下伏煤炭资源的高速公路而言,必须及时掌握煤矿地下开采对其运营安全的影响。在分析一般公路下煤炭开采影响公路路基相关因素的基础上,综合研究采深、采厚因素对路基的影响,重点通过数值模拟手段分析采深采厚比对高速公路路基的影响,得出采深采厚比大于180∶1时,地下采煤所引起的地表变形对路基结构的破坏变形远小于一级保护建筑物容许的极限变形值,从而得出可以在高速公路下试采,最终全采的结论。

For coal mining under expressways, the effect of the underground coal mining on expressway construction and operation safety is of great importance. This paper analyzed the general influencing factors of underground coal mining on expressway roadbed. The effect of mining depth and mining height on the damage of expressway roadbed was discussed through the numerical simulation method. The effect of underground mining on roadbed was minimal when the ratio of mining depth and thickness was greater than 180 ： 1. The surface deformation value caused by un- derground mining was much less than a certain limit deformation value of first grade state protection buildings. The results show that pilot production and clean mining can be carried out under expressways.