Filling paste prepared from salt deposit exploitation tail salt and consolidated filling method thereof

A technology of paste and tailing salt, which is applied in the direction of filling, mining equipment, earth square drilling, etc., can solve the problems of land occupation and adverse impact, achieve huge environmental and social benefits, reduce land occupation, and maintain mining safety Effect

Active Publication Date: 2012-06-27
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if sand, stone, etc. are used as filling materials for cemented filling, although a stable filling body can be formed to meet the filling requirements, a large amount of tailing salt processed from salt ores can only be piled on the ground, which not only takes up a lot of land but also has adverse effects on the environment.

Method used

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  • Filling paste prepared from salt deposit exploitation tail salt and consolidated filling method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1, a kind of filling paste that utilizes salt deposit to mine tailing salt, it is filling base material with the tailing salt after mineral processing of potassium halite or carnallite ore;

[0046] The main components of the filling substrate are NaCl and MgCl 2 , with hemihydrate gypsum CaSO 4 ·?H 2 O is a cementing material; the hemihydrate gypsum and the MgCl in the filling substrate 2 ·6H 2 The mass ratio of O is 0.90:1; NaCl is added as the aggregate of the solidified filling base material as required, and the concentration of the filling material is adjusted by the amount of NaCl added;

[0047] The filling base material and cementing material were mixed and stirred at 90°C to form a paste with a mass concentration of 81%.

Embodiment 2

[0048] Embodiment 2, a kind of filling paste that utilizes salt deposits to mine tailing salt, it uses potassium halite or carnallite ore as the filling base material after beneficiation and processing of tailing salt;

[0049] The main components of the filling substrate are NaCl and MgCl 2 , with hemihydrate gypsum CaSO 4 ·?H 2 O is a cementing material; the hemihydrate gypsum and the MgCl in the filling substrate 2 ·6H 2 The mass ratio of O is 1.00:1; NaCl is added as the aggregate of the solidified filling base material as required, and the concentration of the filling material is adjusted by the amount of NaCl added;

[0050] The filling base material and cementing material were mixed and stirred at 135°C to form a paste with a mass concentration of 88%.

Embodiment 3

[0051] Embodiment 3, a kind of filling paste that utilizes salt deposits to mine tailing salt, it uses potash salt or carnallite ore after beneficiation and processing tailing salt as filling base material;

[0052] The main components of the filling substrate are NaCl and MgCl 2 , with hemihydrate gypsum CaSO 4 ·?H 2 O is a cementing material; the hemihydrate gypsum and the MgCl in the filling substrate 2 ·6H 2 The mass ratio of O is 0.95:1; NaCl is added as the aggregate of the solidified filling base material as required, and the concentration of the filling material is adjusted by the amount of NaCl added;

[0053] The filling base material and cementing material were mixed and stirred at 180°C to form a paste with a mass concentration of 84%.

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Abstract

The invention discloses filling paste prepared from salt deposit exploitation tail salt. The filling paste is characterized in that: tail salt prepared by performing ore dressing processing on sylvite or carnallite ore is taken as a filling substrate; the filling substrate mainly comprises NaCl and MgCl2, and hemihydrate gypsum CaSO4 1/2H2O is taken as a cementing material; NaCl serving as an aggregate for solidifying the filling substrate is added as required, and the concentration of a filling material is adjusted by controlling the adding amount of NaCl; and paste of which the mass concentration is 81-88 percent is formed by mixing and stirring the filling substrate with the cementing material. The invention further discloses a filling method for using the filling paste. High-concentration paste is prepared by using the tail salt and the cementing material, the paste filling material is solidified through a physical-chemical reaction after being pumped to an underground worked out section, and a filling body with certain strength can be formed without dehydration in a stope. Softening damage to ore columns and wall rock caused by water contained in filling slurry is avoided, and the ecological environments on the ground surface and the periphery of a mining area are protected effectively.

Description

technical field [0001] The invention relates to a filling material and method for a mine deposit, in particular to a filling paste for mining tailing salt from a salt deposit, and the filling paste is especially suitable for the underground mining of potassium halite or carnallite deposits. The goaf is filled; the present invention also relates to a method for cemented filling with the aforementioned filling paste. Background technique [0002] There are mainly two types of filling methods in the prior art, one is that the goaf formed by the mining of salt deposits is filled with liquid, and its material is mainly saturated brine; the other is the goaf formed by underground mining of metal and non-metallic deposits Tailings cemented filling is generally used. [0003] The method of using saturated brine to fill gobs is generally only applicable to salt deposits mined by water solution. When salt deposits are mined by water solution, saturated brine is filled into the cave ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/12E21F15/08
CPCY02W30/91
Inventor 张春方黄振伟牛明远
Owner BLUESTAR LEHIGH ENG INST CO LTD
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