Method for water-stopping grouting plugging in high-pressure high-flow water gush channel

Abstract

The invention discloses a method for water-stopping grouting plugging in a high-pressure high-flow water gush channel. The method comprises the following steps: observing opening degree of the water gush channel at the position of a water gush point, and determining water gush conditions; at a certain position from the water gush point, performing construction and drilling in the upstream water gush channel; when the drilling construction is performed to a set depth and is not communicated with the water gush channel, placing a sleeve in a drilled hole, plugging the whole sleeve; after the plugging is qualified, deepening the drilled hole to disclose the water gush channel, and connecting an aggregate adding device to the sleeve; utilizing the aggregate adding device to inject kelp into the water gush channel, wherein the kelp gradually remains at the position of the narrow position of the channel in the process of being carried by water and is accumulated and blocks a water channel, the flow cross-section of the channel is reduced, so that the water velocity is slowed down, and the water gush amount is reduced; and when the water gush amount is reduced to a set value, injecting grouting materials into the drilled hole, wherein the grouting materials are congealed and hardened in the water gush channel and thus the water gush channel is plugged.

Description

technical field [0001] The invention relates to a water-resistance grouting sealing method in a high-pressure and large-flow gushing channel, which belongs to the field of water prevention and control in mines, tunnels and other underground projects. Background technique [0002] In underground engineering, especially in the construction of deep buried tunnels or mines, water inrush or water gushing often occurs after geological structures containing water conduction, which brings great hidden dangers to the normal construction and safety of underground engineering, sometimes suddenly or A large flow of water gushing will cause serious geological disasters. Because this type of gushing water generally has the characteristics of high water pressure, fast flow velocity, and large flow rate, it is called high-pressure and large-flow gushing water. The control of high-pressure and large-flow gushing water has always been a technical problem in the field of grouting. Because th...

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Problems solved by technology

Because the cement-based inorganic grouting materials (cement slurry, cement-water glass slurry, etc.) injected into this type of gushing channel will be washed away by high-pressure and large-flow gushing water instantly, diluted and lost; organic chemical grouting with high expansion The volume of materials (such as Malisan, polyurethane, etc.) expands rapidly after injection, and the volume expansion rate can be as high as ten times. It is difficult to spread to the far end when faced with high-pressure water gushing, and it will block the drilling hole, and the construction quality cannot be guaranteed.

Therefore, it is extremely difficult to control high-pressure and large-flow gushing water at present.

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