Closed underground brine mining system and construction method thereof

An underground brine, closed technology, applied in the direction of mining fluid, earth drilling, sealing/isolation, etc., can solve the problems of low permeability, less brine extraction, and difficulty in meeting actual production needs

Active Publication Date: 2020-06-16
青海凹口凸钾镁盐技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

China's geological reserves of KCl are about 990 million tons, and liquid brine mines are the mainstay. The production of potassium salts is mainly through the collection of underground brine in salt lakes to produce potassium fertilizers. With the extension of the development period of salt lakes, the increase in development intensity and production volume At present, most of the surface brine of the salt lake is seriously insufficient, and the brine of the surface salt layer of the salt lake can no longer maintain normal production, so that the service life of the salt lake resources is constantly shortening, and the service life of the salt lake resources in my country is less than 30 years
The third is the method of brine extraction combined with wells and canals. At present, this method is used by most of the salt lakes to extract brine from the deep brine storage layer below the surface salt rock layer of the salt lake, because only a single channel or well mining cannot meet the actual production conditions. It is not the best and most economical way; due to the low porosity, slow flow rate and small range of brine mining in the deep brine storage layer below the surface salt rock layer of the salt lake, and the high cost of brine mining canal exca

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  • Closed underground brine mining system and construction method thereof
  • Closed underground brine mining system and construction method thereof
  • Closed underground brine mining system and construction method thereof

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Embodiment Construction

[0026] see in conjunction Figure 1 to Figure 4As shown, it is an overall schematic diagram of the salt lake closed underground brine mining system according to the embodiment of the present invention.

[0027] see figure 1 , is a schematic plan view of the in-line and H-shaped brine mining blocks in the closed underground brine mining system of the embodiment of the present invention. For the brine storage layer located between two or more natural sedimentary water-resisting layers in the salt lake, the system uses artificial drilling curtains, rotary excavation and rotary spraying to form a separation wall 8, and a water-resisting dam 11 filled with slots , separating and trapping the brine storage layer between the first water-resisting layer and the second water-resisting layer, arranging gas compression wells 6 near the center of the lake in these closed spaces, and arranging brine discharge wells 10 near the edge of the lake; Simultaneously, the center position of the ...

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Abstract

The invention relates to the technical field of underground brine mining, and specifically provides a closed underground brine mining system and a construction method thereof. The closed underground brine mining system includes a gas compression device, a first water isolation layer, a second water isolation layer, a brine storage layer, partition walls, brine drainage wells and water isolation dams, wherein the brine storage layer, the partition walls, the brine drainage wells and the water isolation dams are located between the first water isolation layer and the second water isolation layer. The upper ends of the partition walls extend to the first water isolation layer, the lower ends of the partition walls extend to the second water isolation layer, and the partition walls, the firstwater isolation layer, the second water isolation layer and the water isolation dams divide the brine storage layer into a plurality of enclosed spaces. Each enclosed space is a brine mining block. Agas compression well is arranged at the position, near the center of a lake, in each brine mining block, the brine drainage wells are arranged at the positions, near the edge of the lake, in the brinemining blocks, the brine drainage wells are provided with brine drainage pipes, and brine can be drained through the brine drainage pipes and then directly transported to salt pans or grit chambers.The closed underground brine mining system can reduce the cost of brine mining, greatly increases the mining amount of the brine, and improves the mining efficiency and increases the recovery rate.

Description

technical field [0001] The invention relates to the technical field of underground brine mining, in particular to a closed underground brine mining system and a construction method thereof. Background technique [0002] Potassium salt is mainly divided into two categories, one is solid potassium salt, which is mainly distributed in Canada, Russia, Belarus, Thailand, Laos and other countries, and only a small amount is distributed in Jiangcheng, Yunnan Province in my country; the other is liquid brine mine, which is mainly distributed in Among the salt lakes in arid and semi-arid areas, my country is mainly distributed in the salt lakes in Qinghai, Xinjiang, Tibet and other regions in the west of China; potassium salt resources are my country's strategic resources, and potassium salts are mainly used to produce potash fertilizers for agricultural production and are food grains. [0003] China is the largest potash fertilizer consumer in the world, and potash is one of the seve...

Claims

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Application Information

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IPC IPC(8): E21B43/00E21B33/138
CPCE21B43/00E21B33/138
Inventor 山俊杰
Owner 青海凹口凸钾镁盐技术有限公司
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