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The experiments, which include the complete stress-strain curves, triaxial compressive loading history and the main factors affecting the compressive strength of the material, were made to research the mechanical properties of paste-like fill material. The results show that the material still has a relatively high load-bearing capacity after yielding. From the view of the backfill strength, the suitable content of the fine particles in the aggregates is 20%, the curing temperature of backfill slurry is about 20 centigrade degrees or higher. The backfill strength can reach 2. 5-3. 6 MPa when the binder dosage is 5%-8%. It can meet the needs for mining with backfill.
The experiments, which include the complete stress-strain curves, triaxial compressive loading history and the main factors affecting the compressive strength of the material, were made to research the mechanical properties of paste-like fill material. The results show that the material still has From the view of the backfill strength, the suitable content of the fine particles in the aggregates is yield of 20%, the curing temperature of backfill slurry is about 20 centigrade degrees or higher. The backfill strength can reach 2. 5-3. 6 MPa when the binder dosage is 5% -8%. It can meet the needs for mining with backfill.