基于变形监测的采空区注浆加固治理效果评价

Evaluation of goaf grouting reinforcement effect based on deformation monitoring

为评价采空区注浆加固治理效果,首先根据采空区地质采矿条件,将研究区域按注浆区、注浆影响区和非注浆影响区分区,并在相应区域地表和建筑物上布置变形监测点,获得实测沉降值,再结合注浆钻孔位置,综合分析注浆效果。分析结果表明:以非注浆影响区的平均沉降值为背景值,注浆区地表实测下沉较非影响区减少了68.7%;注浆区建筑物实测下沉较非影响区减少了21.0%,采空区采用注浆加固治理具有显著的减沉效果。

In order to evaluate the goaf grouting reinforcement effect, the research area was divided into grouting area, grouting - influence area and non - grouting - influence area, according to the goaf geological and mining conditions, and deformation monitoring points were arranged on surface and buildings in the corresponding region, to obtain the subsidence value ; then the grouting effect was comprehensively analyzed combining with the grouting hole position. The analysis results showed that, combined with the average subsidence in non - grouting - influence area, the surface subsidence in grouting area decreased by 68.7% , and the building subsidence in grouting area decreased by 21% , achieving significant subsidence reducing effect with goaf grouting reinforcement.