Dry-type cement filling method realized by aid of extracted tail salt of salt deposit

A technology of cemented filling and tailing salt, which is applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of land occupation environment and adverse impact, achieve huge environmental and social benefits, maintain mining safety, and reduce land occupation for stockpiling area effect

Active Publication Date: 2012-07-11
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, cemented filling with sand, stone and other materials can form a stable filling body to meet the filling requirements, but 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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  • Dry-type cement filling method realized by aid of extracted tail salt of salt deposit
  • Dry-type cement filling method realized by aid of extracted tail salt of salt deposit
  • Dry-type cement filling method realized by aid of extracted tail salt of salt deposit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1, a dry cemented filling method for mining tailings using salt deposits. The filling material of the method is potash salt or carnallite ore after processing tailings; the main component of tailings is NaCl,

[0034] The filling method is dry filling, the filling material is in a solid state, and the filling material is transported downhole by one of the chute self-slipping, underground vehicle, belt transportation or a combination of the foregoing methods.

Embodiment 2

[0035] Example 2, a dry cemented filling method for mining tailings using salt deposits. The filling material of the method is potash or carnallite tailings after processing; the main component of the tailings is NaCl And MgCl 2 , And NaCl and MgCl 2 The molar ratio of is not less than 1;

[0036] The said filling method is dry filling, the filling material is in a solid state, and the filling material is transported downhole by one of the chute self-slipping, underground car, belt transportation or a combination of the foregoing methods;

[0037] The filling method is cemented filling; a cementing agent is added to the filling material, and the cementing agent is clay or saturated NaCl brine.

Embodiment 3

[0038] Example 3, the filling method described in Example 2: When filling, the filling materials are fully mixed and filled in layers. The thickness of the filling is 300~500mm at a time. The filling material is thrown first, and then saturated NaCl brine or loose clay is sprayed as needed. , The final rolling process cycle for filling.

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Abstract

The invention relates to a dry-type cement filling method realized by the aid of extracted tail salt of a salt deposit. The dry-type cement filling method is characterized in that a filling material in the method is tail salt remained after beneficiation processing of sylvine or carnallite ores; the main ingredients of the tail salt are NaCl or NaCl and MgCl2; the filling material is solid, and is conveyed in a well by modes of drop shaft sliding, underground automobile conveying, belt conveying and the like; the filling method is used for cement filling; and when the main ingredients of the tail salt are NaCl and MgCl2, cementing agent is added in the filling material, and is clay or saturated NaCl brine. By the aid of tail salt dry-type cement filling, a filling body with the certain strength can be formed in a hollow area, damage of ore pillars and surrounding rocks can be prevented effectively, surface collapse and subsidence are prevented, and recovery safety is maintained. A large quantity of tail salt is utilized, occupied area of stacked tail salt is greatly reduced, and the ground surface of a mining area and surrounding ecological environments are protected effectively.

Description

Technical field [0001] The invention relates to a method for filling the goaf of a ore deposit, in particular to a dry cement filling method for mining tailings from salt deposits, which is suitable for underground mining of potash or carnallite deposits. Empty areas are filled. Background technique [0002] There are mainly two types of filling methods in the prior art. The mined area formed by the mining of salt deposits is filled with liquid, and the material is mainly saturated brine; the mined area formed by underground mining of metal and non-metallic deposits generally uses tailings. Sand cement filling. [0003] The method of filling the mined-out area with saturated brine is generally only applicable to salt deposits mined in water. When salt deposits are mined in water, saturated brine is filled in the cave after mining to support the roof and protect the surface from ground collapse. However, when the salt deposits adopt underground mining, there are a large number of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21C41/20C04B28/00
Inventor 张春方牛明远
Owner BLUESTAR LEHIGH ENG INST CO LTD
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