Potash salt ore goaf filling method

A technology for potash mines and goafs, which is applied to fillings, mining equipment, earthwork drilling and mining, etc. It can solve the problems of lower ore recovery rate, poor economic index, and large amount of Portland cement, etc., and meet the strength requirements , the effect of less dosage and low cost

Active Publication Date: 2010-10-20
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

However, the traditional filling method cannot be applied to the goaf of the potash mine, because the filling strength of the goaf of the potash mine is high, otherwise the recovery rate of th

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  • Potash salt ore goaf filling method
  • Potash salt ore goaf filling method
  • Potash salt ore goaf filling method

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Embodiment Construction

[0014] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0015] Reference below figure 1 A method for filling a gob in a potash mine according to an embodiment of the present invention is described.

[0016] like figure 1 As shown, according to the filling method of the potash mine goaf of the present invention, firstly, the potash mine obtained by dry mining is subjected to beneficiation to obtain the tailings of the potash mine.

[0017] Then, the magnesium cement and the tailings of the potash mine, if necessary, add water, and mix and s...

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Abstract

The invention discloses a potash salt ore goaf filling method, including the following steps: potash salt ore is subject to mineral separation, so as to obtain potash salt ore tailing; magnesium cement and the potash salt ore tailing are mixed and stirred into filling pulp; and the filling pulp is conveyed to potash salt ore goaf. According to the potash salt ore goaf filling process of the invention, pulp made by mixing magnesium cement and tailing is taken as filling main material, as the magnesium cement is mainly magnesium oxide, magnesium oxide water soluble magnesium salt is taken as gelling material, then water is added for blending, and air hardening gelled body, thus meeting the strength requirement of goaf filing.

Description

technical field [0001] The invention relates to a gob filling method, in particular to a gob filling method of a potash mine. Background technique [0002] Traditional potash mines have two mining methods, water mining and dry mining. There is no problem of goaf filling in water mining. Dry mining is to beneficiate potash ore to obtain concentrate and tailings, in which tailings contain more than 90% NaCl, and the obtained tailings are usually stacked in the mining area. [0003] With strict environmental protection requirements, potash mine tailings cannot be stacked on the ground, nor can they be discharged. Therefore, the use of dry mining to mine potash mines is restricted. In ordinary mining, the goaf is usually filled with Portland cement as a cement and mixed with tailings to form a filling slurry. However, the traditional filling method cannot be applied to the potash mine goaf, because the backfill strength of the potash mine goaf is high, otherwise the ore recov...

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Application Information

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IPC IPC(8): E21F15/06C04B28/30C04B18/12
CPCY02W30/91
Inventor 李国政丁鹏贺茂坤施士虎朱瑞军
Owner CHINA ENFI ENGINEERING CORPORATION
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