建筑物下伏采空区充填注浆效果综合检验技术

Combined Examine Technique for Results of Backfill Grouting for Goaf beneath Buildings

为了对锅炉房下伏采空区地面注浆充填效果进行检验,采用钻孔取芯、钻孔电视观测结合钻孔声波测试的综合检验方法。钻孔取芯获得了浆液结石体照片;钻孔电视观测直观表明采空区残余空洞及采动裂隙被浆液充填密实;钻孔声波测试基于围岩、浆液结石体和采空区残余空洞的声波速度差异对治理区整体注浆充填效果进行评价。

In order to examine the results of backfill grouting for goaf beneath a boiler room which to be construct in the future,a combined examine technique including drilling for core,borehole television and borehole acoustic wave test is utilized.Firstly,concretion of the cement-fly ash grouts is got by the drilling for core;then,a vivid picture prove the fill effect of the grout for residual void and mining fractures of the goaf directly is obtained by the borehole television.Furthermore,the entire grouting results is evaluated by borehole acoustic wave test based on the velocity gap among bedrock,concretion of the grouts and residual void and mining fractures of the goaf.