Gravity drainage system for underground roadway high-pressure water inrush

Abstract

The invention discloses a gravity drainage system for underground roadway high-pressure water inrush. A retention wall is built in a roadway between a waterproof gate and an inrush point, and the roadway and the retention wall form a water storage space. The retention wall is provided with at least one drain pipe connected with the water storage space and space outside the retention wall. The drain pipes lead to a mining horizontal central water sump, an upper horizontal central water sump or the ground. The gravity drainage system for underground roadway high-pressure water inrush has the advantages that the cost is low, the structure is simple, no electricity is needed, drainage equipment is used less frequently or no drain pump is used, continuous drainage is facilitated and insusceptible to electricity, water resources are protected, sewage treatment cost is lowered, water release can be controlled through a valve, sampling is available anytime, the analysis on changing of the recharge water is assisted, and considerable water is provided for mine production.

Description

technical field [0001] The invention relates to a drainage system for a mine, in particular to an artesian drainage system for highly pressured water gushing in an underground roadway. Background technique [0002] It is a difficult problem to eliminate the water gushing in the underground roadway with sufficient water supply, especially the floor water in highly pressurized mines. At present, three methods are adopted to deal with it. The first is to block the water outlet point by ground grouting, such as Figure 5 As shown, a series of boreholes are drilled on the ground above the water outlet point, drilled into the water inrush channel (usually a fault) around the water outlet point, and the water outlet point is blocked by injecting cement, sand aggregate or chemical materials; The second is downhole grouting to block the water outlet, such as Figure 6 As shown, that is, the water retaining wall is built first, and the water outlet point is blocked by grouting throu...

AI Technical Summary

Problems solved by technology

Although the above methods are active protection methods, they all have complex construction techniques, long construction periods, high costs, and tens of millions of dollars. Sometimes, if the design of parameters such as drilling positions and depths is inaccurate, and the location of water inrush channels is judged incorrectly, it is easy to cause closures. Block failure

At present, direct forced drainage in the roadway is the third response method, but this method is a passive protection method. Sometimes for the sake of safety, temporary retaining walls are also built for grouting or temporary water retaining. They are all temporary and simple. Generally, direct strong drainage is adopted, that is, high-power water pumps (submersible pumps, centrifugal pumps) are used to drain water, and several drainage pumps (generally at least three or more, one for drainage, one for maintenance, and one for maintenance) need to be installed near the water inrush point. Standby), the drainage pump has been working continuously for about 20 days, and it has to be replaced due to long-term workload or improper operation, and it wastes electric energy. The overall benefit of the mine, if there is a power outage, it may even cause a well flooding accident

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