Method for underground coal mine dust removal by aqueous alkali

Abstract

The invention relates to a method for underground coal mine dust removal by aqueous alkali. The method sequentially includes the following steps: selecting appropriate alkaline chemicals according to spraying and injection coal seam situations; selecting compounding concentration of corresponding aqueous alkali according to coal rank and laboratory test; selecting low-rank and medium-rank coal, drilling in a coal seam, plugging orifices of drilled holes, preparing the corresponding aqueous alkali, and pumping the prepared aqueous alkali into the drilled holes; soaking for a period of time to enable the coal and the aqueous alkali to be fully reacted, and soaking repeatedly to ensure coal in a drilling control area to be fully reacted with the aqueous alkali; preparing aqueous alkali suitable for spraying, and spraying the aqueous alkali to remove dust during coal mining. Alkali is utilized to react with organic matters in the coal, so that dust production capability of the coal can be lowered greatly; meanwhile, the contact angle of reacted coal dust with water is decreased sharply, an excellent dust removal effect is achieved, physical and mental health of workers is protected, safety in production of coal mines is guaranteed, and the method is high in practicality and has promotion and application values.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety and environmental protection production, and relates to an underground coal mine dust removal method using alkali solution. Background technique [0002] In recent years, with the development of the economy, the country's demand for coal is increasing, coupled with the continuous increase in the intensity of mine mining. The increasing degree of mechanization. The amount of dust generated in various production processes such as coal mining, tunneling, and transportation in coal mines has also increased sharply. Coal dust will cause great damage to human eyes, ears, skin, digestive system, and respiratory system, especially to the human respiratory system. If workers work in an environment with excessive dust content for a long time, they are very easy to get pneumoconiosis. In my country, pneumoconiosis is still the most serious occupational disease, and the incidence cycle is shortening...

AI Technical Summary

Problems solved by technology

In recent years, there are more and more researches on chemical dust removal methods, but the research on the use of alkali solution dust removal has not yet appeared.