Underground tunnel large dynamic water plugging method

Abstract

The invention discloses an underground tunnel large dynamic water plugging method. The method comprises the steps that (1), the position, the direction and the specification shape of a tunnel are determined according to a tunnel design drawing; (2), a plurality of drill holes are drilled in a permeable tunnel on the ground in the direction of the tunnel and are spaced by a certain distance, and an orifice tube is arranged at the upper mouth of each drill hole; (3), aggregates are thrown into the permeable tunnel through any drill hole to determine the water bursting tunnel dynamic conditions, and the number of thrown iron chains is determined; (4), the iron chains are thrown into the permeable tunnel from the drill hole in the most downstream, and the iron chains are stacked to be in a mountain shape in the permeable tunnel; (5), large and small aggregates are thrown into the upstream drill holes sequentially from the drill hole adjoining to the most downstream, and the large and small aggregates and the iron chains form a filter framework until a water plugging curtain is formed; (6), after the water plugging curtain is built, the permeable tunnel is grouted from the drill hole in the most upstream and then burst water can be plugged; (7), the iron chains can be lifted out after grout is solidified. The method has the advantages that water is plugged fast and materials are saved.

Description

technical field [0001] The invention relates to an emergency relief method after water penetration in a coal mine underground, in particular to a large dynamic water blocking method in an underground roadway. Background technique [0002] Underground water inrush accidents in coal mines occur frequently, causing heavy losses to coal mine production, safety and operation. In the past, water blocking was done by drilling from the ground to find the location of the outlet roadway based on geological data, injecting aggregates (big and small stones, soybeans, kelp, glass water, cement, etc.) Construct the pipe flow as a permeable flow, construct an aggregate curtain, and then grout to block and intercept the flow. But when the water output is too large (flow rate per minute 80 ~ 90m 3 ) A large amount of aggregate is washed away by the water flow after being injected, a large amount of aggregate and time are wasted, the sealing effect is poor, and it also makes it difficult ...

AI Technical Summary

Problems solved by technology

But when the water output is too large (flow rate per minute 80 ~ 90m 3 ) A large amount of aggregate is washed away by the water flow after being injected, a large amount of aggregate and time are wasted, the sealing effect is poor, and it also makes it difficult for the dredging work of the roadway after the sealing

Images