Deep-thin layer natural alkali, salt and saltpeter well-to-well multi-layer connection exploitation process

Abstract

The invention discloses a process for the communicated multi-bed exploitation of deep thin-bed natural alkali, salt and saltpeter cross wells which are buried more deeply and have thinner ore beds. The process is characterized in that the well distance is enlarged to be about between 400 and 500 meters by using the stratum cracks and vertical cracks at a depth of more than 1,200 meters underground, the characteristics that the vertical cracks extend in different directions, but the main crack direction extends longer, and techniques for detecting trend, ground stress and crack direction of the ore beds, and the wells can be communicated within a proper time period so as to prolong the service life of brine wells and improve the economy of the brine exploitation. Meanwhile, natural alkali beds on both sides of each crack can effectively contact with and be dissolved in injecting miscellaneous water by making use of the characteristics that the water solubility of dunn bass and top bottom plates of the alkali ore beds is much smaller than that of the alkali bed, and the ore beds and the top bottom plates can be cracked by multiple fractures so as to furthest make use of natural alkali resources. The deep-thin bed natural alkali, salt and saltpeter which are buried more deeply and have thinner ore beds can be explored by using the process, and favorable economic benefit and social benefit can be obtained.

Description

Technical field [0001] The invention relates to the technical field of trona, salt and nitrate mining which are deeply buried, and in particular to a multi-layer connected mining process for deeply thin layers of trona, salt and nitrate wells. Background technique [0002] The mining technology of soluble natural salt, alkali and nitrate buried in the ground has been studied for many years, and many important achievements have been obtained. The currently prevailing method is: when the burial is relatively shallow, mechanical dry mining technology is adopted, and the ore is dug out mechanically and then dissolved to produce the required products (such as the Green River alkali mine in the United States); when the burial is deep and the ore layer is thick , the horizontal well technology can be used to connect the two wells (currently the method of most wells in domestic salt mines), so as to achieve the purpose of economical and effective mining; , because the ore seam is t...

AI Technical Summary

Problems solved by technology

[0003] In order to solve this mining problem, the present invention summarizes the production experience over the years and the actual mining situation of Anpeng Alkaline Mine, and comprehensively analyzes the problem of drilling and water-soluble mining. The multi-layer connected mining technology of nitrate wells can economically and effectively mine deeply buried trona, salt and nitrate

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