Testing Method and Application of Grouting Treatment Effect in Coal Mine Goaf Area

This paper introduces the testing method and qualification standards of Technical for Ground Treatment of Buildings in Coal Mine Goaf(GB 51180—2016) for grouting effect in coal mine goaf area, and applies them in the grouting tests of a coal mine goaf area in Shandong. By comparing the changes of the testing results before and after grouting in goaf area with high-density electrical method and transient electromagnetic method, combining with drilling verification, the macroscopic characteristics of grouting in goaf area are exposed, and the grouting effect in goaf is qualitatively analyzed. The grouting effect in goaf is quantitatively analyzed through pressure grouting test, wave velocity test and compressive strength test of stone bodies. The results show that the combination of qualitative and quantitative methods has achieved good results in testing of grouting effect in goaf area.