| 摘要 |
The invention concerns the field of geotechnology and can be used for underground solution of natural salts from ore bodies where they are deposited. The invention increases efficiency of natural salt deposits mining by underground dissolution, while mineral losses decrease and product brine is diluted less. It includes drilling of wells, solvent supply to a deposit, formation of horizontal caverns and lifting brine to the surface using flexible solid-drawn pipe. The caverns are controlled by way of regulating solvent supply through apertures in the flexible solid-drawn pipe using an operated cartridge installed in the pipe. When the operated cartridge is moved along the solid-drawn pipe, one or several apertures in the solid-drawn pipe and cartridge get matched in the right zone of deposit initiating dissolution of this zone. A valve opening rate in operated cartridge is used for additional control. The invention allows to carry out an effectively controlled process of underground solution, to reduce losses of minerals and dilution of product brine. Even if a deposit has an irregular roof shape, waste rock is not exposed to dissolution. |
