#$%^&*AU2019101682A420200213.pdf#####ABSTRACT The invention discloses a fluid-based segmented filling grouting sealing method. The method first expands and seals a gap between a discharge pipe and a drilling wall by elastically filling a cavity at both ends of a borehole, and then injects the non-Newtonian fluid paste sealing material into the grouting space between the elastic filling cavities. Under the action of pressure the fluid penetrates into the coal body, thereby sealing the cracks around the borehole, and if necessary, the secondary grouting can be carried out. Compared with the prior art, the invention has the advantages that the sealing materials are all flexible materials and can change adaptively with the deformation of the hole, so the sealing effect is good, and the sealing is non-solidified fluid, the secondary slurry filling is convenient, the operation is simple, safe and reliable, the applicability is strong, etc., the phenomenon of air leakage caused by inadequate sealing can be avoided, the sealing quality can be improved, the gas tightness can be guaranteed, and the effect of gas on the coal-drainage layer can be improved. -1 -6 g3 4 5 t Fig. 1
展开▼
