Multistage drive ore dissolution method used for mining salt mines

Abstract

The invention discloses a multistage drive ore dissolution method used for mining salt mines, which is characterized in that: water injected into an ore deposit stepwise infiltrates to dissolve the mines through a multistage water supply ditch consisting of a primary water supply ditch and secondary water supply ditches, wherein the extension directions of the water supply ditches are vertical tothe ground water flowing direction; the interval of the water supply ditches is 100-700m, preferably 200-600m; besides, stirring boats are arranged in the secondary water supply ditches to uniformly mix a solvent of water and mineral brine of the previous stage dissolved mines, which flows out of the stratum, so as to form a new solvent. Through the method, the water level is integrally raised, and the total amount of beneficial mineral resources mined from dissolvable mines is increased; the flow velocity of the solvent is reduced, the contact time with solid minerals is prolonged, and the dissolution rate is improved; and a dominant channel is cut off, and the direct-emission waste of the solvent is effectively reduced. The method is applied to exploitation of shallow, scattered, low-grade and soluble solid minerals through water dissolution.

Description

technical field [0001] The invention relates to a water-soluble mining method in the field of mineral resource development, in particular to a water-soluble mining method for collecting low-grade soluble salt. Background technique [0002] The object of water-soluble mining is salt minerals. Water-soluble mining is based on the characteristics that most salt minerals are easily soluble in water. Water is injected into the deposit as a solvent, and the salt minerals in the deposit are dissolved on the spot and transformed into a fluid solution— —Brine, and then a mining method of collecting and transporting. Water-soluble mining has been widely used at home and abroad. It is a mining technology with a long history and a new emerging in modern times. In modern times, it is not only used to mine salt deposits, but also is being applied to mining sandstone-type copper ore and uranium ore and other minerals. . [0003] The water-soluble method of mining salt mines is mainly dri...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: complex shaft structure, long trench construction period, easy breakage of central pipe, low brine output, high production cost and low ore recovery rate, etc.

[0006] From 2006 to 2008, aiming at the existence of a huge amount of low-grade solid potassium salt in a certain place in Northwest my country, the applicant combined experimental research with field ore dissolution experiments, breaking through the previous conclusions based on laboratory research or natural transformation , or the research results of high-grade solid potassium ore, using a certain lake water as a solvent to realize the driving liquefaction of low-grade solid po...

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