采煤对露天煤矿土壤理化性质及可蚀性影响.

[Objective] To study the impact of coal dust generated by open-pit coal mining activities in arid areas on the physical and chemical properties of soil and soil erodibility in surrounding areas. [Method] The representative Hongshaquan coal mine in Zhundong coal field in Xinjiang was selected as the research area. Collect soil samples within 2000 m from dumps, coal dumps, and mining areas, analyze soil physical and chemical properties and calculate erodibility factor (EF) values, explore the relationship between soil physical and chemical properties and (EF) values, and analyze their spatial distribution laws [Results] ① Coal dust deposition has different degrees of impact on various physical and chemical properties of soil, among which organic matter has the most significant impact, showing an exponential distribution from high to low with distance. The particle structure of the surface soil of the dump is significant with other sampling points The difference is that the sand content of the soil surface layer is significantly reduced, and the soil clay content is significantly increased. ② The soil EF value has a very significant positive correlation with soil pH, soil total phosphorus, and soil sand content (P<0.01), and has a positive correlation with soil organic matter, The content of soil clay particles and powder particles showed a very significant (P<0.01) negative correlation. The order of correlation is pH> clay particles> organic matter> sand particles> powder particles> total phosphorus> calcium carbonate> total salt> bulk density> total Nitrogen. ③The coal dumps and dumps formed by coal mining activities play a role in reducing soil erodibility. The soil EF value reaches the lowest value at the coal dump, and the soil EF value in the coal mine area is also significantly smaller than the surrounding areas. [Conclusions] ] Coal mining activities have a significant impact on the physical and chemical properties of the soil around the mining area, thereby reducing soil erodibility. [ABSTRACT FROM AUTHOR]