The influence of ground fissure on Vegetation ecological environment in Ningdong coal mine

The geological disaster of ground fissures is a kind of important vegetation ecological geological environmental damage, and hence the detection of the influence of ground fissures on the vegetation ecological environment in such aspects as the way, degree and extent for vegetation ecological environment protection of east Ningxia coal mining area is of great significance. Soil moisture is an important index to evaluate whether cracks affect the vegetation ecology; the existence of the ground fissures exacerbates soil water loss of the vegetation; therefore, the selection of typical vegetation area and soil lithology structure area for in situ experiment in the coal mine goaf, the dynamic monitoring of crack edge, and the soil moisture of different buried depths away from the fracture zone vadose section should be done in combination with meteorological elements analysis so as to achieve the purpose of the study of vegetation ecological environment effect of the ground fissures. Some conclusions have been reached:(1) Water loss of soil water is that the water is lost first and the surface is then lost. (2) The time of soil moisture dissipation is dynamic and positively correlated with temperature, with the largest occurring in July, which exhibits two evaporation surfaces, and the second occurring in August, which exhibits one evaporation surface. (3) Affected by soil lithology, soil moisture content shows "S" characteristics with the increase of soil depth, with the order of water-holding property of different lithologic characters being aeolian sand > loess soil > root soil > silt. This conclusion has important guiding significance for the protection of vegetation ecology and geological environment in Ningdong coal mine area.