A double-liquid grouting method for water column stop grouting in ultra-deep boreholes in underground mines

Abstract

The invention relates to a double-liquid grouting method for water column stop grouting in an ultra-deep borehole underground in a mine, and belongs to the field of mine water disaster prevention and control. It includes: the steps of constructing water plugging and grouting drilling according to the design parameters, the steps of judging the exact position of the water storage channel, the steps of estimating the water passing area of ​​the storage channel, and the calculation of the bottom end of the second-stage aperture casing. The steps of the design depth position in the borehole, the steps of running and sealing the second-stage aperture casing, the steps of connecting and running the double-grouting grouting pipe, the steps of installing the sealing device, and grouting and water blocking after the installation is completed Steps for dismantling the double grouting pipe and sealing device after grouting. It effectively solves the problems of borehole diameter shrinkage and hole wall collapse in water-sensitive formations, shortens the migration distance of mixed slurry to a large extent, and can inject double-slurry mixed slurry into boreholes of mines with any depth. The grout can quickly realize the plugging of the water storage channel and achieve the purpose of grouting and water plugging.

Description

technical field [0001] The invention relates to a double-liquid grouting method for water column stop grouting in an ultra-deep borehole underground in a mine, and belongs to the field of mine water disaster prevention and control. Background technique [0002] Water damage has always been one of the major geological disasters that seriously affect mine production safety and threaten the life safety of operators. Grouting water blocking is an important means of controlling mine water hazards. After the water gushes out of the mine, it is generally necessary to carry out grouting through the underground drilling of the mine, and inject grout into the karst (crack) and the water storage channel in the gushing water source stratum for sealing, so as to achieve the purpose of grouting and water blocking. However, when grouting is carried out using the commonly used two-liquid mixing method at the orifice, when the borehole length exceeds 100m, the mixed grout needs to migrate a...

AI Technical Summary

Problems solved by technology

Because the double-fluid grout cannot be poured safely and smoothly, only a single-fluid slurry can be injected through the drill hole. The single-fluid slurry that enters the water-guiding crack is quickly washed away and diluted by the high-pressure dynamic water in the storage water-guiding channel, resulting in poor grouting effect , the construction period is long, and the project cost seriously exceeds the budget and other adverse consequences

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