Development overview of paste backfill technology in China's coal …
Long-term backfill can be realized by arranging the pipeline once, reducing human–machine safety hazards. 4. Complex geological conditions and thin coal seam are more suitable for paste backfill. When the thickness of the coal seam is more than 3 m, slicing mining is generally adopted to make the height of the backfill panel less than 3 m. 5.
قرأ أكثر