Abstract:

Selection of sensors on the pillar stress changes were observed to be mining process. Analysis shows that, in the working face advancing process, closing to the working face side abutment pressure influence range of 46m coal pillar by, and a convex form; the range of 52-64m was not affected by mining, and closing to the working face 46m in a smaller two peak abutment pressure range of coal pillars, which were located in the work side of 18m and 38m. By the coal pillar edge to the deep, the plastic zone of pillar is 0-10m, the elastic region is 10-50m, the original rock stress area is 50-60m.

Key words: Large mining height working face, The coal column partition, side abutment pressure