Double-freight single-filling filling hydraulic support and using method

Abstract

The invention discloses a double-waybill-filling filling hydraulic support and a using method, a double-waybill-filling non-stop device is arranged on a rear top beam of a traditional filling hydraulic support, and meanwhile an adsorption material with good porosity and a heavy metal curing function is added into a coal-based solid waste pressure-bearing material. Pressure-bearing materials and adsorption materials are transported by switching the positions of a fourth roller and a fifth roller correspondingly, the adsorption materials and filling materials cooperate with filling operation to form a novel filling wall body which is in interval circulation, and heavy metal solidification is achieved while the filling supporting strength is met. The influence of underground water pollution on mine production and the ecological environment of a mining area is weakened, meanwhile, normal mining operation is not affected, good economic benefits and environmental benefits are brought to the mining area, and safe and green mining of coal is promoted.

Description

technical field [0001] The invention belongs to the field of hydraulic support for solid waste filling and mining in the coal industry, and in particular relates to a double waybill filling hydraulic support and a use method thereof. Background technique [0002] my country is a big country of coal production and consumption. Coal mining will generate a large amount of solid waste. Take gangue and fly ash as an example. At present, the cumulative amount of gangue piled up in my country exceeds 6 billion tons, ranking first in the country's industrial waste. And it is increasing year by year with an annual discharge of about 500-800 million tons. In 2020, my country's fly ash discharge will be about 900 million tons. However, in 2019, the domestic waste rock and fly ash utilization rates are 53.7% and 74.9%. There is a lot of space for utilization, but coal-based solid waste such as gangue and fly ash will seriously damage the ecological environment if it is not handled properl...

AI Technical Summary

Problems solved by technology

At present, coal mine filling materials are mainly coal-based solid waste such as coal gangue, fly ash, gasification slag, furnace bottom slag, desulfurization gypsum, etc. A large number of cracks in the overlying rock constitute water seepage channels. The filling material will be leached by mine water first, and will be soaked in mine water for a long time later. As time goes by, the heavy metals in the filling body will be dissolved under the action of mine water. and migration to pollute groundwater, seriously damage the ecological environment, and endanger human health

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