Choice of filling materials and techniques in xiniao pyrite mine

摘要

The suitable filling materials and cemented rockfill techniques were discussed in detail on the basis of the mechanical features measurements of cemented samples in Xinqiao Pyrite Mine. The ratios of filling materials and the suggested pouring technique of cemented rockfill had been proved reasonable by the field ex- periment, from which, the main conclusions were obtained as follows: (1) Cemented rockfill is better than ce- mented sand fill for Xinqiao Mine; (2) The recommended composition ratios of cemented rockfill are 1:15 for cement-sand, 2-3:1 for rock-sand, and 1.8-2.0 for water-cement, respectively.