Abstract:

According to similarity simulation theory, the characteristics of particle size distribution in the coal mine waste damp of Haizhou coal mine in Fuxin was analyzed. A threedimensional physical model was built according to the drilling histogram on the physical model by Matlab image processing technology. The results showed that the interior of a whole coal mine waste dump could be divided into three parts. The smaller coal gangue particles were mainly distributed around the upper area of the dump and the medium particle size of coal gangue were located in the central region, and the larger size of coal gangue concentrated around the bottom of the dump. A  strip  of serrated structure could be found around the junction between two regions. The number of strips gradually reduced along the wings of track slope of the dump. Influenced by different particle size of the coal gangue distribution in the dump, the value of the coal gangue unit weight was higher in the middle and upper area, while in the surrounding position, the value of the unit weight was lower.

Key words: similarity simulation experiment, coal mine waste dump, particle size distribution, profiles, histograms