Mining spraying agent

A spraying agent and mining technology, applied in the spraying treatment of mine roadway walls and the field of mining spraying agents, can solve the problems of high cost of water glass and curing agent, great influence of water glass temperature, inconvenient packaging and transportation, etc. Low effect, good compactness, convenient production and construction

Inactive Publication Date: 2009-06-03
西安森兰科贸有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two components used in this method are both emulsions, which is inconvenient for packaging and transportation.
The curing of water glass is greatly affected by temperature, and the operation is difficult
In this method, the cost of water glass and curing agent is relatively high, so this method is not conducive to large-scale use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Cement: fly ash: water: polyvinyl alcohol glue = 1: 3: 1.4: 0.2 (weight ratio), after spraying the slurry of this proportion, the 1d strength of the sprayed well wall (the strength of one day, the following analogy) is 2MPa, 28d strength is 4.7MPa, after 28d, the strength still increases, there is no crack on the well wall, and the added adhesive is stable and has good impermeability.

[0017] Contrast test: the above cement and fly ash are mixed without adding polyvinyl alcohol glue, the strength of 1d is 1.6MPa, and the strength of 28d is 2.2MPa, and the sprayed well wall has more cracks, and the leakage resistance is obviously weakened.

Embodiment 2

[0019] Cement: large white powder: water: polyvinyl alcohol glue=1: 4: 1.8: 0.2 (weight ratio), after the slurry spraying of this kind of ratio, the well wall 1d intensity of spraying is 2.3MPa, and 28d intensity is 8.7MPa, There is no crack on the well wall, and the added adhesive is stable and has good impermeability.

[0020] Contrast test: When the above cement and white powder are mixed without adding polyvinyl alcohol glue, the strength of 1d is 1.8MPa, and the strength of 28d is 2.2MPa, and the sprayed well wall has more cracks, and the leakage resistance is obviously weakened.

Embodiment 3

[0022] Cement: fly ash: large white powder: water: polyvinyl alcohol glue = 1: 1: 1.5: 1.4: 0.05 (weight ratio), after the slurry spraying of this kind of ratio, the 1d strength of the well wall is 2.3Mpa, and the 28d strength is 11.2Mpa, the added adhesive is stable and has good impermeability.

[0023] Comparative test: without adding polyvinyl alcohol glue to the above solid materials, the 1d strength of the well wall is 1.7Mpa, and the 28d strength is 5.4Mpa, and there are many cracks on the well wall, and the leakage resistance is obviously weakened.

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Abstract

The invention provides a cement-based mining spraying agent, which is mainly used for spraying mine walls, and comprises a solid material, water and an adhesive, wherein, the solid material is one of the following materials: the mixture of cement and ground calcium carbonate, the mixture of cement, ground calcium carbonate and fly ash and the mixture of cement and fly ash, wherein, the solid material comprises the following components by the weight ratio: 10% to 40% of cement, 0% to 90% of ground calcium carbonate and 0% to 80% of fly ash; the adhesive is polyvinyl alcohol glue or polyvinyl alcohol modified adhesive with the weight being 1% to 5% of the solid material. The mining spraying agent has the advantages of convenient construction, good strength and little possibility of drying crack and shedding after being sprayed on the mine wall, and lower cost.

Description

technical field [0001] The invention belongs to slurry for spraying, in particular to a cement-based mine spraying agent, which is mainly used for spraying treatment of mine roadway walls. Background technique [0002] The roadway wall of the mine must be treated. On the one hand, it can prevent the gravel from falling on the top of the roadway and hurt people, and on the other hand, it can strengthen the shaft wall and prevent the shaft wall from weathering. For coal mines, the shotcrete sealing technology is still one of the coal seam fire control methods. By spraying the sealing agent on the roadway and goaf wall, it can effectively prevent the air from entering the crushed coal area along the air leakage channel, and prevent the combined heat release of coal and oxygen. At the same time, it can strengthen the well wall and goaf wall. [0003] The methods of mine roadway wall treatment mainly include spraying mortar, spraying Rock Hugh, urea-formaldehyde resin and so on....

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/08
CPCC04B2111/00724C04B2111/343C04B28/02Y02W30/91C04B14/28C04B18/08C04B24/2623C04B24/307
Inventor 邓军文虎刘鑫张荣张辛亥马砺韦亚洲翟小伟费金彪
Owner 西安森兰科贸有限责任公司
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