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 potassium ore under open conditions—that is, single-stage driving, which has no precedent at home and abroad

Evidence 2 is the fact that the dominant pipeline flow is actually photographed. The influence of the existence of the dominant channel on the dissolution of the ore is that the dissolution rate of the solvent is greatly reduced, that is, the solvent quickly flows through the formation in the form of pipeline flow, and the contact with the soluble salt deposit The exchange time is greatly shortened, the target of mining cannot be effectively dissolved, the efficiency of ore dissolution is reduced, and the cost of ore deposit development is correspondingly increased

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