Mining method of brine ore with low porosity, low water yield and low permeability

Abstract

The invention relates to the technical field of underground brine exploitation. The invention provides a mining method of a brine ore with low porosity, low water yield and low permeability. The mining method is applied to an air-driven brine mining system, the system comprises a brine conveying channel (1), a plurality of parallel brine conveying pipes (2) connected to the brine conveying channel (1), a plurality of brine mining wells (3) connected to each brine conveying pipe (2), a plurality of gas injection holes (4) uniformly distributed in a brine mining area, a plurality of gas conveying pipes (5) for connecting the gas injection holes (4) in series, and an air compressor unit (6). According to the method, the brine mining cost can be reduced, the brine mining amount can be greatly increased, the mining efficiency can be improved, and the recovery rate can be increased when the brine ore of the fine-debris aquifer with low porosity, low specific yield and low permeability is mined.

Description

technical field [0001] The present application relates to a mining method of brine ore, in particular, relates to a mining method of deep brine ore under the conditions of low porosity, low water supply and low permeability, using a combination of brine mining wells and gas injection holes. Background technique [0002] my country is the largest potassium fertilizer consumer in the world, and potassium salt is one of the seven bulk minerals in short supply in my country, and has become an important strategic resource to ensure national food security. 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 salt lake surface brine brine exploitation is ser...

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Problems solved by technology

[0004] The commonly used canal mining method can no longer satisfy the exploitation of deep brine layers. Although well mining can solve most of the exploitation of deep brine layers, but for fine clastic aquifers with low porosity, low water supply and low porosity (8) For deep pore brine, the cost of mining brine is high, the mining efficiency is low, and it is difficult to realize large-scale, engineering, and sustainable brine mining

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