A method of applying chemical grout to implement grouting and water plugging in shaft shafts

Abstract

The invention provides a method of implementing grouting and water plugging of a shaft through chemical grout. The method mainly includes the following steps: (1) installing a hole opening pipe, a high-pressure ball valve, a grouting pipeline, a grouting pump and other equipment at a grouting hole; (2) opening the high-pressure ball valve, and ejecting cement grout from the grouting hole through the grouting pump; (3) connecting a mixer with the grouting pump, respectively ejecting urea resin and an oxalic acid solution in the mixer through two pipelines, mixing the urea resin and the oxalic acid solution in the mixer, and ejecting the mixed grout in the grouting hole through the grouting pump; and (4) closing the high-pressure ball valve, stilling for 10-24h so that the grout in the grouting hole is solidified, then detaching the high-pressure ball valve, and grouting in another hole. The method is good in water plugging effect, can achieve effective plugging of water guide micro cracks, and is simple to operate and low in cost.

Description

technical field [0001] The invention belongs to the technical field of mine maintenance, and relates to a method for applying chemical slurry to a vertical shaft shaft for grouting and water blocking. Background technique [0002] In mine mining operations, the main mine is generally a vertical shaft structure. Since the rock mass around the mine often encounters a permeable aquifer, a large amount of fissure water stored underground will continue to seep out along with the working surface. In severe cases, the entire shaft will leak. Water, especially in the several faults that the wellbore passes through, has concentrated water gushing, and the faults have a large amount of water gushing and high water pressure. If the seepage and gushing water in the wellbore cannot be effectively blocked, the operating environment of the main well equipment will be seriously deteriorated, and the production capacity will also be seriously affected. [0003] At present, the domestic prob...

AI Technical Summary

Problems solved by technology

Most of the existing grouting water blocking technologies use traditional ordinary cement slurry as the main grouting slurry, and the cement slurry can only block the large crack water-conducting channels due to its large particle size, and the micro-cracks still cannot be effectively sealed. If the wellbore is deep and the well wall is not made of anti-seepage concrete, the high hydrostatic pressure will cause water to continuously seep from the cracks in the surrounding rock, and then seep into the well wall through the capillary pores of the well wall concrete, so new materials should be used It is an effective way to solve the wellbore water seepage and water gushing with a reasonable plan for grouting behind the wall