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

A high-energy gas fracturing and high-energy gas technology, which is applied in the field of improving the permeability of ore-hosting rock formations, can solve the problems that are not conducive to the full reaction of the leaching solution and uranium minerals, the permeability of the ore layer is not conducive to in-situ leaching mining, and cannot be leached by leaching agents. Ore and other issues, to achieve the effect of improving recovery rate and unit yield, improving utilization efficiency and increasing permeability

Active Publication Date: 2009-05-27
SHIJIAZHUANG RAILWAY INST
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  • Description
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  • Application Information

AI Technical Summary

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 t

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

Examples

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Comparison scheme
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Example Embodiment

[0031] Example 1

[0032] In-situ leachable layer sandstone has a permeability of 10 -6 D. The compressive strength of sandstone is 200MPa. The implementation process of the continuous high-energy gas fracturing and permeation enhancement method is: the high-energy gas generator 3 is sent to the ore-bearing rock through the cable 1 through the production well 2, and the plug 32 is tightly integrated with the production well. The high-energy gas generator 3 is fixed, and the deflagration bomb 35 is ignited through the delayed igniter 34. The high-energy gas generator 3 is connected in series with 10 deflagration bombs 35 and 10 delay igniters 34. The first deflagration bomb contains solid explosives, and the remaining 9 deflagration bombs contain solid powder. The delay time of the delay igniter 34 For 1 minute, control the peak pressure of high-energy gas in the production well to 500MPa. After the high-energy gas acts on the ore bed for 30 minutes, close the plugging device to re...

Example Embodiment

[0033] Example 2

[0034] In-situ leachable layer sandstone has a permeability of 10 -4 D. The compressive strength of sandstone is 160MPa. The implementation process of the method for increasing the permeability of continued high-energy gas fracturing is: send the high-energy gas generator 3 to the ore-bearing rock through the production well 2 with the cable 1, and tightly integrate with the production well through the blocker 32 The high-energy gas generator 3 is fixed, and the deflagration bomb 35 is ignited through the delayed igniter 34. The high-energy gas generator 3 is connected in series with 6 deflagration bombs 35 and 6 delayed igniters 34. The first deflagration bomb contains solid explosives, and the remaining 5 deflagration bombs contain solid powder. The delay time of the delayed igniter 34 It is 40 seconds to control the peak pressure of high-energy gas in the production well to 400MPa. After the high-energy gas acts on the ore bed for 25 minutes, close the pluggi...

Example Embodiment

[0035] Example 3

[0036] In-situ leachable layer sandstone permeability is 10 -3D. The compressive strength of sandstone is 130MPa, and the implementation process of the method for increasing the permeability of continued high-energy gas fracturing is: send the high-energy gas generator 3 to the ore-bearing rock through the production well 2 with the cable 1, and tightly integrate with the production well through the plug 32 The high-energy gas generator 3 is fixed, and the deflagration bomb 35 is ignited through the delayed igniter 34. The high-energy gas generator 3 is connected in series with 4 deflagration bombs 35 and 4 delayed igniters 34. The 4 deflagration bombs contain liquid gunpowder. The delay time of the delayed igniter 34 is 20 seconds to control the peak pressure of high-energy gas in the production well. The size is 300MPa. After the high-energy gas acts on the ore bed for 20 minutes, close the blocker to relieve the pressure of the ore layer, so that the high-ene...

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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...

Claims

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Application Information

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IPC IPC(8): E21B43/28E21B43/26
Inventor 王伟王晶岳祖润陈祥军温进芳刘秀峰孟硕
Owner SHIJIAZHUANG RAILWAY INST
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