1results about How to "Guaranteed waterproof effect" patented technology

The application provides a downhole grouting method for plugging a water-conducting space of laterally burned rock, comprising the following steps: determining a water-conducting space of laterally burned rock of a coal seam and a working face to be mined in the coal seam affected by the water-conducting space, and drawing a curtain line of the water-conducting space outside a mining disturbance damage range of the working face to be mined; arranging a plurality of first grouting holes between the curtain line and the burned rock, grouting the first grouting holes, and determining diffusion ranges of slurries with different concentrations; determining a slurry concentration corresponding to a second grouting hole and a diffusion range of a slurry corresponding to the slurry concentration, determining a spacing of the second grouting hole according to the diffusion range of the slurry corresponding to the slurry concentration; arranging a plurality of second grouting holes between the curtain line and the burned rock according to the spacing of the second grouting hole, and grouting the second grouting holes from the working face to be mined according to the slurry concentration corresponding to the second grouting hole. The application improves the accuracy of grouting plugging, reduces the grouting time, saves the amount of grouting slurry, and reduces the grouting cost.