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Application of a cemented filling material containing straw fiber in filling mining

A cemented filling material and straw fiber technology, which is applied in the field of mine filling materials, can solve the problems of low utilization rate of fine-grained tailings, high cement unit consumption, poor crack resistance, etc., achieve wide application significance and promotion value, reduce unit cost Consumption, improve the effect of utilization

Active Publication Date: 2020-06-30
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems of low compressive strength, poor crack resistance, high cement unit consumption and low utilization rate of fine tailings in the mine filling of fine tailings. The present invention provides a Application of a cemented filling material containing straw fiber in filling mining

Method used

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  • Application of a cemented filling material containing straw fiber in filling mining
  • Application of a cemented filling material containing straw fiber in filling mining
  • Application of a cemented filling material containing straw fiber in filling mining

Examples

Experimental program
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Effect test

Embodiment 1

[0070] The mass ratio of the fine-grain tailings fiber cemented filling material of the present invention is as follows:

[0071] 1 part of straw fiber, 249 parts of cement, 995 parts of fine tailings, and 763 parts of water.

[0072] Straw fiber length 1 ~ 3cm.

[0073] This embodiment was tested for compressive and tensile properties, and the results are shown in Table 2.

[0074] Table 2 embodiment 1 performance measurement result

[0075]

[0076] Comparing the experimental results of Example 1 and Comparative Example 1, it can be seen that adding the straw fiber helps to improve the compressive strength and tensile strength.

Embodiment 2

[0097] The mass ratio of the fine-grain tailings fiber cemented filling material of the present invention is as follows:

[0098] 1 part of straw fiber, 205 parts of cement, 1024 parts of fine tailings, and 753 parts of water.

[0099] Straw fiber length 1 ~ 3cm.

[0100] The embodiment was tested for compressive and tensile properties, and the results are shown in Table 4.

[0101] Table 4 embodiment 2 performance measurement result

[0102]

[0103] Comparing Example 2 and Comparative Example 2, it can be seen that adding the straw fiber helps to improve the compressive strength and tensile strength. In addition, Comparative Example 1 and Comparative Example 2 found that the use of cement was reduced, and the strength decreased significantly, but it was found through Comparative Example 1 and Example 2 that under the premise of reducing the amount of cement, through the addition of the straw fiber, Its various strengths can be close to or better than the experimental r...

Embodiment 3

[0105] The mass ratio of the fine-grain tailings fiber cemented filling material of the present invention is as follows:

[0106] 0.5 parts of straw fiber, 205 parts of cement, 1024 parts of fine tailings, and 753 parts of water.

[0107] Straw fiber length 1 ~ 3cm.

[0108] This embodiment was tested for compressive and tensile properties, and the results are shown in Table 5.

[0109] Table 5 embodiment 3 performance measurement result

[0110]

[0111] Comparing Example 2 and Example 3, it can be seen that in the case of reducing the amount of fiber added, the compressive strength and tensile strength of the filling body are both reduced, and the mechanical properties of the filling body are deteriorated.

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Abstract

The invention discloses application of a straw-fiber-containing cemented filling material to filling mining, belonging to the technical field of filling materials for mines. The invention also provides the filling material, comprising straw fiber, cement and mine tailings. The invention also provides filling slurry. The filling slurry comprises 0.5-1.5 parts of straw fiber, 174-254 parts of cement, 975-1066 parts of fine tailings and 702-813 parts of water, wherein the fiber has a length of 0.5-5 cm, and the mass concentration of the filling slurry is 60-64% after mixing and stirring. According to the invention, doping of straw fiber into the filling material can effectively overcome the problems of low strength and proneness to cracking of a fine-tailing filling body after curing and improve the compressive performance and fracture resistance of the filling body. With the fiber-containing filling material, the compressive strength and tensile strength of the filling body can meet the requirements of mining on the strength of the filling body, unit consumption of filling cement per cubic meter is reduced, and the utilization rate of the fine tailings is improved, so the straw-fiber-containing cemented filling material is an innovative filling material for mines and has a wide application range and good promotion value.

Description

technical field [0001] The invention relates to the technical field of mine filling materials, in particular to the application of a straw fiber-containing cemented filling material in filling mining. Background technique [0002] With the depletion of mineral resources and the continuous safety and environmental problems caused by the development and utilization of resources, the filling mining method has gradually become the mainstream trend of mining development. After the stope is filled, the surrounding rock support of the filling body and the control of ground pressure will put forward higher requirements for the research and innovation of filling materials. [0003] At present, most mine fillings mainly use graded tailings as filling aggregate. The fine-grained tailings (-74μm) contained in the overflow water after classification need to be transported to the tailings storage. Enterprises will have to face the construction of tailings storage and the High expansion c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00724C04B2201/50C04B18/24C04B18/12
Inventor 史秀志陈新方振鹏陈辉黄沛生周健杜向红李恩铭钟杰唐鸣东谢胜饶帝军柯武阳李洁
Owner CENT SOUTH UNIV
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