Method for ecological restoration in coal mining subsidence area by recycling river sediment
A technology for river sediment and ecological restoration, applied in application, surface mining, underground mining, etc., can solve problems such as unfavorable environmental protection and low-carbon economic development, large demand for materials, large cement consumption, etc., to reduce ecological backfilling. Cost, simple operation, land saving effect
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Embodiment 1
[0072] Embodiment 1. In this embodiment, the method for ecological restoration of the coal mining subsidence area by using river sediment as a resource, specifically includes the following steps:
[0073] S1, the river bottom mud is taken, and the river bottom mud is dehydrated to make the water content reach 80%.
[0074] Then, add the fly ash (particle size is 0.3mm) that quality is 10% of the river channel bottom mud quality after the dehydration, the cement (intensity 42.5mm) that the quality is 5% of the river bottom mud quality after the dehydration. ), the quality is 5% lime (particle diameter 0.2mm) of the dehydrated river bottom mud mass, first manually stirred for 5 minutes, then mechanically stirred for 5 minutes, and the dehydrated river bottom mud was solidified.
[0075] Then, add the litter (auxiliary material) that moisture content is 15%, particle diameter is 1.0cm in the river channel bottom mud after solidification, make the C / N in the mixture after the two ...
Embodiment 2
[0081] Embodiment 2. In this embodiment, the method for ecological restoration of the coal mining subsidence area by using river sediment as a resource, specifically includes the following steps:
[0082] S1, the river bottom mud is taken, and the river bottom mud is dehydrated to make the water content reach 70%.
[0083] Then, add the fly ash (particle diameter is 0.1mm) that quality is 15% of the river channel bottom mud quality after dehydration, the cement (intensity 42.5mm) of 10% of the river bottom mud quality after the dehydration in quality. ), the quality is 10% lime (particle size 0.1mm) of the dehydrated river bottom mud mass, first manually stirred for 5 minutes, then mechanically stirred for 5 minutes, and the dehydrated river bottom mud was solidified.
[0084] Then, add the litter (auxiliary material) that moisture content is 10%, particle diameter is 0.5cm in the river channel bottom mud after solidification, makes the C / N in the mixture after the two mixes b...
Embodiment 3
[0090] Embodiment 3, in this embodiment, the method for ecological restoration of the coal mining subsidence area by utilizing river channel sediment resources, specifically includes the following steps:
[0091] S1, the river bottom mud is taken, and the river bottom mud is dehydrated to make the water content reach 74%.
[0092] Then, in the river channel bottom mud after dehydration, add the fly ash (particle size is 0.001mm) that quality is 13% of the river channel bottom mud quality after dehydration, the cement (intensity 42.5mm) that quality is 7% of the river bottom mud quality after dehydration. ), the quality is 7% lime (particle size 0.1mm) of the dehydrated river bottom mud mass, first manually stirred for 5 minutes, then mechanically stirred for 5 minutes, and the dehydrated river bottom mud was solidified.
[0093] Then, add the litter (auxiliary material) that moisture content is 12%, particle diameter is 0.7cm in the river channel bottom mud after solidificatio...
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Abstract
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