Method for storing waste concrete and sealing carbon dioxide in newly-abandoned coal 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 sequestering carbon dioxide in a new abandoned mine. Background technique [0002] Concrete is the largest building material used by human beings, and its theory and technology have become increasingly mature. However, at present, a large amount of concrete is applied, which has brought negative impacts on human settlements and ecosystems. The average lifespan of Chinese buildings is only 35 years, which is far lower than the 70-year lifespan in Europe. Urban demolition and engineering renovations also waste a lot of concrete. According to existing data, it is estimated that by 2020, the amount of waste concrete in my country will be It has reached 628 million tons. Since 97% of the waste concrete in China is directly landfilled and piled up in the open air, a large amount of land resources will be wasted and the environment will be polluted. Therefore, how to dispose of waste concrete w...

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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 fill

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