Ground-dipping ore bed continuous high-energy gas fracturing seepage increasing method and specific high-energy gas generator

Abstract

The invention relates to a continuous high-energy gas fracturing and penetration increasing method for an in-situ leachable ore layer and a special high-energy gas generator and belongs to the technical field of improving penetrability of an ore-bearing terrane. In the continuous high-energy gas fracturing and penetration increasing method for the in-situ leachable ore layer, the high-energy gas generator is transported to the ore-bearing terrane through cable for a producing well to ignite a deflagration shell in the high-energy gas generator; and continuous high-energy gas acts on the ore-bearing terrane and discharges pressure for the ore layer in order that high-energy gas, a gas-water mixture and groundwater form rapid seepage under the action of hydraulic gradient produced instantaneously, thereby completing continuous high-energy gas fracturing and penetration increasing. The high-energy gas generator for the method is characterized in that the structure of the generator comprises: a connecting pipe is sequentially connected with a plugging device, an upper buffer, a time delay igniter, the deflagration shell, a lower buffer and a head tip from top to bottom. The method can improve the permeability of the in-situ leachable ore layer, further improve the mining yield and unit output of situ leaching and mining and improve the utilization efficiency of resource of the in-situ leachable ore layer.

Description

technical field [0001] The invention relates to a continuous high-energy gas fracturing method for in-situ leaching ore layer and a special high-energy gas generator, belonging to the technical field of improving the permeability of ore-hosting rock layers. Background technique [0002] The underground leaching mining process of mineral resources is mainly divided into three stages: the prepared leaching solution is injected into the ore layer through the liquid injection drilling; The hole is pumped out of the surface. Among the three stages, whether the leaching solution can be injected into the ore bed and whether the leaching solution can be extracted from the surface is one of the most important links, and it is also the basis for realizing the mining of minerals by in-situ leaching, and the permeability of the ore bed determines this important link. . Due to the objective geological characteristics of some minerals (mainly low permeability), many prominent contradict...

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Problems solved by technology

Too small or too large permeability of the ore layer is not conducive to in-situ leaching mining, too small is not conducive to the migration of the leaching solution in the rock formation, and too large is not conducive to the full reaction between the leaching solution and uranium minerals, especially the aforementioned The method used in the hydrocarbon formation forms several obvious radial fractures in the ore layer, which makes the leaching solution easy to form a dominant flow, and cannot fully and comprehensively dissolve the ore with the leaching agent, failing to achieve the purpose of leaching

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