中文摘要：

为保证采动区桥梁的交通安全,根据华丰矿地质采矿条件,结合矿井成功实施的离层注浆工程,对桥梁的周边区域增加注浆钻孔,加大注浆量。根据布设的地表及桥梁测点的岩移观测数据,对比预计的未离层充填时地表最大下沉量,表明离层注浆条件下鲁里大桥区域减沉率达到56%,采动区域桥梁仍能保持正常使用,该方法对桥梁的保护效果显著,可为类似条件下地表减沉工程提供参考。

英文摘要：

In order to ensure the safety of bridge in mining area of Huafeng Mine, according to the geological and mining conditions and combining with the successful implementation of the grouting bed separation engineering, some borehole were drilled surrounding the bridge and the quantity of grouting was increased. Based on the rock moving observation data, compared with the estimate maximum ground subsidence quantity if dont grouting, the result shows that the subsidence reduction rate reached 56% in Luli Bridge area under the condition of grouting. The bridge in mining influence area can still maintain normal use. The method has a good effect for bridge protection and provide reference for surface subsidence -reducing project as the similar conditions.