Influence Of Research That Coal Mine Subsidence To Wind Erosion

This paper with the BuLianTa mineral sandstorm area and subsidence area of ShengFu–Dong Sheng coal field as research object, with the coal area to sink the influence to the sandstorm activity as the mainly study contents, the open country sandstorm that passes a system of 2 years abservation and samples the analysis. the following problems were researched and discussed.Influence of research that coal mine subsidence to wind erosion. First, to the earth's fall to sink the characteristic and the particle size of characteristic varieties, the earth's sink the crack, the earth's falls to sink to the sandstorm erosion accumulate the quantity and erosion to accumulate the strength, subsidence area vegetation cluster variety , sink the area wind erosion of synthesize to adjudicate the model etc carried on the research and study. The result enunciation:(1) The formation that earth's surface falls to sink, changed the original earth's appearance and the soil structures, thus turned more worse that the progress of the earth's sand sport; Particle size degree the variety responds to the wind erosion: The T2004 curve appearance was very accordance with the T2005 subsidence area , the were both zenith, two obvious KG values appear in 0.54φmm and 0.125φmm, on the contrary, the WT subsidence area curve as single zenith, its max appears in 0.125φ. This elucidation the subsidence soil induce to the soil crack, the soil subsidence etc. so, it makes the ShengDong mineral sandstorm area latent can the wind erosion strength was more worse.(2) Through the research of the earth's surface crack, analysis to the different position and different time, With the earth's subsidence of crack to affect the wind erosion of theory as correspond the point after subsidence area, the first get to earth's to sink the wind erosion theory and earth's sink the wind sand of sport variety regulation; and also to the research enunciation that the earth's subsidence the crack both sides the dry sand layer and wet sand layers, because of the position dissimilarity of subsidence crack the place ( such as Sand dune coping , aweather central sand dune , Sand dune low ground etc.), but the varieties of the crack both sides the dry sand layer thickness(H) are all along with the increment that away from the crack distance with the logarithms function of negative related increase, the same wet sand layer variety with rate of water(M) with the increment that away from the crack distance with positive related growth of function of line, and according to sink the crack width and fall high to the dry sand layer thickness and wet sand layers influence relation with rate of water, got to fall to sink the crack to the model that the wind erosion respond to.(3) Along with the extension of sink the time dimensions, the sandstorm erosion and accumulates the quantity and erosion to accumulate the strength with sink time was the relation of negative line; When sink the strength as SSI∈[50%,100%),SSI∈[35%,50%), the erosion and accumulated the strengths all for pile up the high strength of 4( CI), SSI∈[20%,35%), the strength was also a high strength 4( EI), But the part also exists deposit, SSI∈[10%,20%) was light degree 1( EI). This elucidation be to fall to sink the strength to decrease for the some certain value, its erosion and accumulate the appearance would take place the change. Through calculation and logically reason, erosion and accumulate critical sink the strength as 30.69%, and when subsidence soil strength SSI∈[0%,100%], the sandstorm erosion that sink the strength and districts accumulates the related relation of the quantity as polynomial function.(4) The first gets to the reason that the coal plants the variety fall by cluster to respond to to the earth's wind erosion after fall to sink, thinking to the coal falls to sink directly increased plant of death rate, contrarily,because of death vegetation of again direct adverse effect of death rate enlargement in fall to sink the soil, thus make the whole mineral district or a partial mineral to take place the serious wind erosion.(5) The open country investigates after by to ShengFu-DongSheng mineral wind of sand area to fall to sink, main marking that thinks the wind erosion strength of its district to adjudicate was: The earth's subsidence strength( SSI), wind erosion factor (C), the wind erosion and accumulates strength( SEQ), vegetation cover rate( VCR), after presents a fuzzy pattern for assessment of wind erosion, as a result: The T2005 subsidence area to belong to a very degree wind erosin district; The T2004 year subsidence area to belong to a wind erosion district;The WT subsidence area to belong to the medium degree or light wind erosion district.