Rock salt mine mining method

Abstract

The invention discloses a rock salt mine mining method. The rock salt mine mining method comprises the following steps that (A) a vertical well A is constructed, and a salt trough is built; the miningmethod is characterized in that the mining method further comprises that (B) a vertical well B is constructed, and a salt trough is built; (C) a horizontal well is constructed, the horizontal well comprises a vertical well section, an inclining increasing section and a horizontal section, and the horizontal section communicates with the salt troughs of the vertical well A and the vertical well B;(D) cement is injected into the horizontal section of the horizontal well for plugging, the horizontal well is separated from the adjacent vertical well, and the vertical well A still communicates with the vertical well B; and (E) horizontal abutting joint is conducted through the vertical well A and the vertical well B for communicating with brine mining. According to the rock salt mine mining method, the problems that rock salt is insoluble and a melting start point is offset from the casing shoe position to the inclining increasing section are eliminated, and the recovery ratio of rock salt resources can be increased.

Description

technical field [0001] The invention relates to a rock salt mining method. Background technique [0002] At present, the main method of mining rock salt mines is drilling and water solution mining. The commonly used methods include single well convective brine mining, fracturing connected brine mining and horizontal docking connected brine mining; the implementation process of horizontal docking connected brine mining is as follows figure 1 , figure 2 As shown: 1. First construct a vertical well 11, and use the vertical well to build a salt tank (small-scale dissolution chamber); 2. Build a horizontal well 12, whose horizontal section 13 is connected to the salt tank of the previous vertical well 11; 3. Horizontal well 12. Vertical well 11 constitutes a group of connected brine extraction units for brine extraction (vertical well 11 and horizontal well 12 alternate water injection and brine extraction); the main disadvantages of this brine extraction process are: ① The bri...

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Problems solved by technology

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and provide a rock salt mining method, which eliminates the problems that the rock salt from the casing shoe to the inclination section cannot be dissolved and the melting point shifts, and can improve the rock salt resources. recovery rate

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