A method for storing waste concrete and sequestering carbon dioxide in a new abandoned mine

Abstract

The invention discloses a method for storing waste concrete and sealing carbon dioxide in a newly-abandoned coal mine. All roadways of the newly-abandoned coal mine are separated, and the size of eachspace after separation is determined; from the end farthest away from a portal of the newly-abandoned coal mine, separation walls are constructed in sequence according to the determined size of eachspace after separation; a material transportation system of the newly-abandoned coal mine is adopted to transport the waste concrete into the space after separation for accumulation, and in the accumulation process, a water supply system is adopted to spray saturated lime water; sealing walls are constructed to seal the space where the waste concrete is accumulated, and high-pressure pipelines arearranged on the sealing walls; after the sealing walls meet the sealing requirements, by means of compressed air pipelines, connected with the high-pressure pipelines, of the newly-abandoned coal mine, the carbon dioxide gas is injected into the space; when injection of the carbon dioxide gas with a certain volume is completed, injection is stopped, and the high-pressure pipelines are sealed. Bymeans of the method, the purposes of waste concrete placement, newly-abandoned coal mine filling and carbon dioxide sealing can be achieved, and soil pollution and the atmospheric greenhouse effect can be reduced.

Description

Technical field [0001] The invention relates to a method for storing waste concrete and sealing carbon dioxide in a new abandoned mine. Background technique [0002] As the largest building material used by human beings, the theory and technology of concrete have matured day by day. However, at present, a large amount of concrete is used and it has a negative impact on the human settlement environment and ecosystem. The average lifespan of Chinese buildings is only 35 years, which is much shorter than the lifespan of 70 years in Europe. Urban demolition and engineering transformation have also abandoned a large amount of concrete. According to existing data, it is estimated that by 2020, the amount of waste concrete in my country will be Reaching 628 million tons, because 97% of China's waste concrete is directly buried and piled in the open air, this will waste a lot of land resources and pollute the environment. Therefore, how to dispose of waste concrete will not occupy land ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method for storing waste concrete and carbon dioxide in a new abandoned mine, filling the waste concrete into the roadway of the new abandoned mine, and filling the carbon dioxide gas into the roadway of the mine at the same time, thereby solving the problem of Placement of abandoned concrete, filling of new abandoned mines and sequestration of carbon dioxide to reduce land pollution and atmospheric greenhouse effect

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