Coal mine cemented filling material and filling method thereof

A technology of cementing filling materials and filling materials, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., and can solve the constraints of initial strength and conveying capacity, complex pulping and conveying systems, and unguaranteed filling effects, etc. problems, to achieve the effect of low cost, superior conveying performance, and small space occupation

Inactive Publication Date: 2015-03-25
SHANXI HEZHONG XINDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, coal mine cemented filling mainly includes paste filling mining and paste-like filling mining. The pulping and conveying systems are relatively complicated, the cost is high, and the initial strength and conveying capacity are greatly restricted.
Especially when the concentration is high, it is very difficult to add a coagulant, resulting in a long working cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The loess from the loess beam in Luliang area, Shanxi Province is excavated by an excavator, and the loess is transported to the vibrating screening machine through the feeding belt, and the loess particles and impurities with particles larger than 1mm are screened out, and the screened loess is transported to the storage material In the warehouse.

[0028] (2) The fly ash is transported to the waste homogenization platform by a feeding belt for homogenization, so that the fly ash particle size is below 1mm;

[0029] (3) The loess, fly ash and cement are conveyed to the weighing hopper of the screw feeder through the feeding belt for weighing and feeding, and 300kg of loess, 100kg of fly ash, 10kg of Portland cement clinker, 25kg Put water-quenched slag, 7.5kg of gypsum, and 7.5kg of quicklime into the primary mixing tank, add 225L of water and stir for 3 minutes at 40 rpm;

[0030] (4) Unload the mixed slurry in the primary mixing tank into the secondary intensifi...

Embodiment 2

[0035] (1) The loess from the loess beam in Luliang area, Shanxi Province is excavated by an excavator, and the loess is transported to the vibrating screening machine through the feeding belt, and the loess particles and impurities with particles larger than 1mm are screened out, and the screened loess is transported to the storage material In the warehouse.

[0036] (2) The fly ash is transported to the waste homogenization platform by a feeding belt for homogenization, so that the fly ash particle size is below 1mm;

[0037] (3) The loess, fly ash and cement are transported to the weighing hopper of the screw feeder through the feeding belt for weighing and feeding, and 400kg loess, 200kg fly ash, 25kg Portland cement clinker, 55kg Put water-quenched slag, 10kg gypsum, and 10kg quicklime into the first-stage mixing tank, add 245L water and stir for 5 minutes at 60 rpm;

[0038] (4) Unload the mixed slurry in the primary mixing tank into the secondary intensified mixing tan...

Embodiment 3

[0043] (1) The loess from the loess beam in Luliang area, Shanxi Province is excavated by an excavator, and the loess is transported to the vibrating screening machine through the feeding belt, and the loess particles and impurities with particles larger than 1mm are screened out, and the screened loess is transported to the storage material In the warehouse.

[0044] (2) The fly ash is transported to the waste homogenization platform by a feeding belt for homogenization, so that the fly ash particle size is below 1mm;

[0045] (3) The loess, fly ash and cement are transported to the weighing hopper of the screw feeder through the feeding belt for weighing and feeding, and 350kg loess, 150kg fly ash, 16kg Portland cement clinker, 48kg Put water-quenched slag, 12kg gypsum, and 4kg quicklime into the primary mixing tank, add 232L water and stir for 4 minutes at 50 rpm;

[0046] (4) Unload the mixed slurry in the primary mixing tank into the secondary intensified mixing tank and...

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Abstract

The invention discloses a coal mine cemented filling material prepared from the major raw material loess and a filling method thereof, and relates to the technical field of coal mine cemented filling. The coal mine cemented filling material is prepared from water and a solid material; the mass concentration of the solid material is 50-65%, and the solid material comprises 30-40 parts by weight of loess, 10-20 parts by weight of coal ash and 5-10 parts by weight of cementing agent. The coal ash is fed into a waste homogenizing table for homogenizing; the loess is conveyed to a sieving machine and sieved by use of a vibrating sieve; the cementing agent, the coal ash and the loess are conveyed to a primary mixing tank by use of a screw feeder and added with water for mixing; the slurry is discharged into a secondary intensified mixing tank and mixed thoroughly; the mixed slurry is conveyed to the bottom of a well. The cemented filling material is low in cost and superior in conveying property; the filling medium is wide in source and easily available.

Description

technical field [0001] The invention relates to the technical field of coal mine cemented filling, in particular to a coal mine cemented filling material and a filling method with loess as the main raw material. Background technique [0002] At present, coal mine cemented filling mainly includes paste filling mining and paste-like filling mining. The pulping and conveying systems are relatively complicated, the cost is high, and the initial strength and conveying capacity are greatly restricted. Especially when the concentration is high, it is very difficult to add a coagulant, resulting in a long working cycle, which is not conducive to the efficient implementation of filling mining. [0003] The premise of loess direct filling is too much investment, and a special conveying system is required. After direct filling, the filling body has a high compression rate and the filling effect cannot be guaranteed. Therefore, the loess cemented filling process is studied for Shanxi, S...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/14
CPCY02W30/91
Inventor 李永元
Owner SHANXI HEZHONG XINDA TECH
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