Well and rock salt solution mining-well recharging filling circulation mining method

Abstract

The invention relates to a well and rock salt solution mining-well recharging filling circulation mining method. Particularly, a solution mining method is adopted for high-recovery-ratio mining of well and rock salt; meanwhile, waste residues generated in alkali preparation, salt preparation or coal burning process are filled in a salt mining solution cavity by a well recharging filling process method; and the solution mining of the well and rock salt and the well recharging filling circulation of the waste residues are implemented simultaneously. According to the method, various types of well and rock salt resources can be sufficiently mined, the method is particularly suitable for mining of ultra-thick well and rock salt resources, the recovery ratio of the well and rock salt resources can be improved obviously lengthwise and crosswise, and the service life of a salt well is prolonged; the waste residues generated in the alkali preparation, salt preparation or coal burning process are filled in the cavity, so that the ground environment pollution is avoided, the resource utilization of the waste residues is implemented, and the ground sinking can be avoided.

Description

technical field [0001] The invention relates to a process method of water-soluble mining of well mine salt resources-well injection and filling cycle mining, specifically adopting the water-soluble mining method to mine well and mine salt resources with a high recovery rate; The waste slag produced in the process of salt production or coal burning is filled into the salt mining solution cavity; the water-soluble mining of well mine salt and the well filling of waste slag injection are carried out in a cycle, and various types of well mine salt resources are fully exploited, especially for ultra-thick mine salt. Mining of mine salt resources. Background technique [0002] Rock salt deposits can be divided into marine sedimentary salt deposits and continental sedimentary salt deposits according to their genetic types. Marine sedimentary salt deposits are characterized by deep burial, large scale, large ore-forming area, high-grade sodium chloride, large single-layer thickness...

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Problems solved by technology

[0008] Aiming at a series of problems such as the low recovery rate of well mine salt resources, easy ground subsidence, and environmental pollution caused by waste residues produced by alkali production, salt production or coal burning, the inventors of the present application combined well mine salt solution mining and waste residue injection into wells. The organic combination of filling, first adopts the water-soluble mining method to exploit well mine salt resources; after that, fill the filling material such as waste slag produced by alkali making, salt making or coal burning into the well into the salt mining solution cavity; after the salt mining solution cavity is filled , and then carry out water-soluble mining of well mineral salt, that is, water-soluble mining and injection well filling cycle

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