Coal gangue processing method and coal gangue foamed concrete and roadway backfilling method

A technology of coal gangue concrete and foamed concrete, which is applied in the fields of coal gangue treatment, coal gangue foamed concrete and roadway backfilling, can solve the problems of inability to achieve complete filling of roadways, inability to carry out compaction operations, affecting filling strength, etc. The effect of avoiding hidden dangers, saving filling materials, and reducing transportation costs

Inactive Publication Date: 2011-12-21
梁林华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct method is to directly fill the coal gangue in the mine roadway; because the coal gangue is in the form of a block, and the compaction operation cannot be performed when the roadway is backfilled, the filled roadway is not compacted, and the blocky coal gangue is difficult to enter the roadway In some narrow areas, resulting in insufficient filling, there are still great safety hazards
The pulverization method is to crush the coal gangue and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Crush the coal gangue in the mine to form coal gangue powder; mix and stir the coal gangue powder, cement and water according to the weight ratio of 3:4:3 to form coal gangue concrete slurry; in the foaming system of the foaming machine Put in an appropriate amount of water and foaming agent, wherein the weight of the foaming agent is 1% of the weight of the gangue concrete slurry, and the foaming system of the foaming machine is fully stirred and foamed by mechanical means to form a foamy aqueous solution; the aforementioned coal Gangue concrete slurry and foam aqueous solution are uniformly mixed and stirred to form coal gangue foamed concrete slurry; concrete pumps are used to pump the coal gangue foamed concrete slurry to the roadway that needs to be backfilled, because the coal gangue foamed concrete slurry has With good fluidity, self-filling and self-compacting properties, it can flow to every corner of the roadway; after the coal gangue foamed concrete slurry is ...

Embodiment 2

[0027] Crush the coal gangue in the mine to form coal gangue particles; mix and stir the coal gangue particles, cement and water according to the weight ratio of 4:3:3 to form coal gangue concrete slurry; in the foaming system of the foaming machine Put in an appropriate amount of water and foaming agent, wherein the weight of the foaming agent is 2% of the weight of the gangue concrete slurry, and the foaming system of the foaming machine is fully stirred and foamed by mechanical means to form a foamy aqueous solution; the aforementioned coal Gangue concrete slurry and foam aqueous solution are uniformly mixed and stirred to form coal gangue foamed concrete slurry; concrete pumps are used to pump the coal gangue foamed concrete slurry to the roadway that needs to be backfilled, because the coal gangue foamed concrete slurry has Good fluidity, self-filling and self-compacting properties, can flow to every corner of the roadway; after the coal gangue foamed concrete slurry is so...

Embodiment 3

[0029] Crush the coal gangue in the mine to form coal gangue powder; mix and stir the coal gangue powder, cement and water according to the weight ratio of 40:25:35 to form coal gangue concrete slurry; in the foaming system of the foaming machine Put in an appropriate amount of water and foaming agent, wherein the weight of the foaming agent is 3% of the weight of the coal gangue concrete slurry, and the foaming system of the foaming machine is fully stirred and foamed by mechanical means to form a foamy aqueous solution; the aforementioned coal Gangue concrete slurry and foam aqueous solution are uniformly mixed and stirred to form coal gangue foamed concrete slurry; concrete pumps are used to pump the coal gangue foamed concrete slurry to the roadway that needs to be backfilled, because the coal gangue foamed concrete slurry has With good fluidity, self-filling and self-compacting properties, it can flow to every corner of the roadway; after the coal gangue foamed concrete sl...

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PUM

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Abstract

The invention discloses a method for processing coal gangue, a coal gangue foamed concrete produced by the method and a method for backfilling a mine roadway with the foamed concrete. First, crush the gangue into powder or granules; then mix the gangue powder or granules, cement, and water to form a gangue concrete slurry; then mix the gangue concrete slurry with foam to form a coal gangue foamed concrete slurry; Finally, the coal gangue foamed concrete slurry is transported into the roadway to be backfilled, and the coal gangue foamed concrete filling body is formed in the roadway after the slurry is solidified. Backfill the roadway with coal gangue foamed concrete, reduce the accumulation and discharge of coal gangue, realize the nearby materials for backfilling the roadway, and realize the dense filling of the roadway without blind areas without mechanical compaction, and improve the safety of the mining area. The gangue foamed concrete of the present invention can also be used for filling roadbeds, pipe foundations, bridge foundations and high fill.

Description

technical field [0001] The present invention relates to a method for processing and recycling coal gangue and the products produced by the method and its application. Specifically, the present invention relates to a method for producing foamed concrete by using coal gangue and the foamed concrete produced by the method And the application of the foamed concrete in the backfilling of mine roadway. Background technique [0002] In order to mine coal, it is necessary to excavate roadways that are not directly connected to the ground in the rock mass or seam. After the coal is mined, these roadways become goafs; when mining underground, it is also necessary for mining lifting, transportation, ventilation, drainage, power supply, etc. Driving roadways; these roadways are horizontal, vertical and inclined, and come in a variety of shapes. When the coal in a certain area has been mined, in order to ensure the safety of the mine, the formed roadway (including the goaf) must be back...

Claims

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Application Information

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IPC IPC(8): C04B18/04C04B28/00C04B38/02E21D11/10
CPCY02W30/91
Inventor 梁林华梁彬
Owner 梁林华
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