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Shock-absorption expansion filling material used for filling deep goaf and preparation method

A filling material and goaf technology, which is used in the field of shock absorption and expansion filling materials and preparation, can solve the problems of filling failure, and achieve the effects of reducing landslides, reducing impacts, preventing and controlling rock bursts

Inactive Publication Date: 2015-12-16
LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a shock-absorbing expansion filling material for filling deep goafs, so as to solve the problem that the traditional filling materials do not connect to the top after being filled into underground goafs.

Method used

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  • Shock-absorption expansion filling material used for filling deep goaf and preparation method
  • Shock-absorption expansion filling material used for filling deep goaf and preparation method
  • Shock-absorption expansion filling material used for filling deep goaf and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Slag No. 325 cement 500.00Kg, mine graded tailings 2000.00Kg, filling water 1231.00Kg, hydrogen peroxide solution with a mass concentration of 27.5% 18.80Kg, calcium stearate 10.00Kg, calcium sulfoaluminate 40Kg, sodium tripolyphosphate 5Kg , Gypsum 10Kg.

[0042] The preparation method of the shock-absorbing expansion filling material includes the following steps: Note that the following formulas are existing formulas.

[0043] (1) Determination of moisture content of tailings: The moisture content of tailings is different due to different storage conditions, so it is necessary to measure the moisture content of tailings. The moisture content determination method is: first weigh the weight of the container m 1 , with an accuracy of 0.1g (the same below), weigh the weight of the tailings and the container immediately after sampling the tailings m 2 (The sample must be weighed immediately after sampling to reduce the influence of water evaporation), put the sample in a...

Embodiment 2

[0055] Slag No. 325 cement 400.00Kg, mine graded tailings 2400.00Kg, filling water 1379.00Kg, hydrogen peroxide solution 18.00Kg, calcium stearate 10.00Kg, calcium sulfoaluminate 60Kg, sodium tripolyphosphate 8Kg, gypsum 12Kg.

[0056] The expansion rate of a shock-absorbing expansion filling material prepared according to the above components is 14.38%, the expansion start time is 0.4h, and the expansion termination time is 21.0h; the filling material is initially set at 1.5h, and finally set at 38.0h; 3d The compressive strength is 0.4MPa, and the strength of 28d is 2.1MPa; the sound wave propagation velocity of 28d is 1393.5m / s, and the stress wave is attenuated by 31.5% after passing through the filling body.

Embodiment 3

[0058] Slag No. 325 cement 300.00Kg, mine graded tailings 2400.00Kg, filling water 1330.00Kg, hydrogen peroxide solution 18.80Kg, calcium stearate 6.00Kg, calcium sulfoaluminate 100Kg, sodium tripolyphosphate 10Kg, gypsum 14Kg.

[0059] The expansion rate of a shock-absorbing expansion filling material prepared according to the above components is 21.15%, the expansion start time is 0.3h, and the expansion termination time is 24.0h; the filling material is initially set at 1.9h, and finally set at 42.0h; 3d The compressive strength is 0.3MPa, and the strength of 28d is 1.7MPa; the sound wave propagation velocity of 28d is 1164.0m / s, and the stress wave is attenuated by 48.52% after passing through the filling body.

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Abstract

The invention discloses a shock-absorption expansion filling material used for filling a deep goaf and a preparation method in order to solve the problem that filling cannot realize roof contact after the underground goaf is filled with a conventional filling material. The shock-absorption expansion filling material is composed of a base material and other material, and the base material comprises, in percent by mass, 53.60%-64.89% of mine tailings, 7.44%-14.60% of a gelling material, and the balance water. The other material is prepared from the following raw materials in percent by mass: 3.75%-8.75% of hydrogen peroxide, 2.00%-6.00% of a stabilizing material, 8.00%-12.00% of calcium sulphoaluminate, 1.00%-3.00% of a retarding material, and 2.00%-4.00% of gypsum. The preparation method comprises selection of the materials, proportioning of the ingredients, molding and molding maintenance. Because of the special pore structure, the shock-absorption expansion filling material possesses the advantages of obvious shock absorption performance, relatively good fluidity, excellent expansion performance and the like, and is especially applicable to filling of the metal mineral deep goaf.

Description

technical field [0001] The invention relates to the field of mining engineering, in particular to a shock-absorbing expansion filling material for filling deep mined-out areas and a preparation method thereof. Background technique [0002] As the shallow resources are exploited in large quantities, they are increasingly depleted, so countries all over the world have adopted deep well mining technology to gradually develop and utilize deep mineral resources. The geomechanical characteristics of deep rock mass determine that the obvious difference between deep mining and shallow mining lies in the special environment in which deep rocks are located, that is, the complex mechanical environment of "three highs and one disturbance". With the increase of mining depth, the rock mechanical properties and in-situ stress characteristics of the mine have undergone fundamental changes compared with shallow mines, and the ground pressure activity has intensified, which may cause rockburs...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B28/14
Inventor 张雄天徐帅李元辉张月侠张国胜赵尔丞李计发朱文志赵永峰魏亚涛
Owner LANZHOU ENG & RES INST OF NONFERROUS METALLURGY
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