Temporal and spatial response characteristics of reconstructed soil moisture under different particle size coal gangue temperature field

For studying the temporal and spatial response characteristics of reconstructed soil moisture under different particle size coal gangue temperature field,construct the experimental field by filling coal gangue with different particle size distribution and the same equal overburden thickness,the hierarchical embedded high precision temperature and moisture sensor,a soil moisture monitoring station,the dynamic monitoring of soil moisture and temperature gradient reconstruction. The experimental results show that The temperature of coal gangue and filling interface is generally low- er than the soil temperature of 15 cm(H1 layer) and 25 cm(H2 layer),and higher than the soil temperature at 35 cm ( H3 layer). That indicates the surface heat conduction acts on soil layers H1 and H2,but the temperature field caused by weathering of coal gangue exists on the filling interface Change the succession phenomenon;the soil moisture of re- claimed land degrades with the increase of soil depth,the land reclamation reconstruction of soil moisture for the overall distribution trend is medium particle>fine particle>coarse particle,medium particle and fine particle of reclaimed land soil moisture average difference value is 3. 7% ;the correlation between the soil temperature in H3 layer and the temperature of gangue layer is the highest. ;the correlation coefficient between soil water content and coal gangue tem- perature is H3>H2>H1;the average correlation coefficient of coarse particle of the reclaimed land was 0. 716,the av- erage correlation coefficient in the medium particle reclaimed land is 0. 668,the average correlation coefficient of fine particle of reclaimed land is 0. 626;the research results can provide work to provide basic data for coal gangue filling reclamation.