Method for building curtain of deeply-buried ultra-thick solution gap fissure aquifer

Abstract

The invention relates to a method for building a curtain of a deeply-buried ultra-thick solution gap fissure aquifer. The method aims at solving the problems that in existing mine deeply-buried aquifer curtain building, due to the low fissure exposure rate, the water interception rate is low, the inspection range of inspection drill holes is small and not flexible enough, and the effective drilling work amount proportion is low. The method comprises the steps that 1), inner and outer directional hole sets are formed in a curtain line, a drill hole grouting casing pipe enters a hard water-resisting layer at the top of a target aquifer, and branch holes of the directional hole sets are drilled in a segmented mode in the axial direction of the curtain along the target aquifer; 2), a grouting method for curtain building is adopted; 3), after grouting of all the directional hole sets is finished, the drill hole cross inspection grouting effect is inspected; 4), according to the aquifer exposure problem of the branch holes and the curtain quality inspection result of the inspection drill holes, vertical coring holes are formed in a targeted mode, and coring verification is carried out; 5), a ground hole transient electromagnetic method is used for probing the weak section of the curtain; and 6), the branch holes are used for carrying out supplementary grouting reinforcement on the weak section of the curtain according to the method in the step 2).

Description

technical field [0001] The invention belongs to the technical field of mine curtain closure engineering, and in particular relates to a method for constructing a curtain for a deeply buried huge thick solution fissure aquifer. Background technique [0002] For mines with abundant groundwater, in order to ensure the safe production of the mine, it is necessary to drain the groundwater, but the drainage costs are high, the burden on the enterprise is heavy, and it causes waste of water resources and damage to the ecological environment. For this reason, in the 1960s, my country's mine water prevention and control workers drew on the experience of hydropower dam grouting to develop the mine curtain grouting water blocking technology, that is, to cut off the groundwater runoff path by constructing an interception curtain in the aquifer, and keep the supply water source outside the curtain , and then drain the aquifer water in the curtain, reduce the amount of drained water and re...

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Problems solved by technology

[0004] The present invention provides a curtain construction method for deep-buried huge thick dissolved fissures and fissures, which solves the problems of low crack exposure rate, low water interception rate and small inspection range of inspection boreholes existing in the curtain construction of deep-buried aquifers in existing mines. Insufficient flexibility and low proportion of effective drilling engineering

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