A New Decision Method of Filling Ratio Based on Energy Matching of Surrounding Rock and Backfill

Table 2

The experimental results and the value of under different ratios of cemented backfill.

Number	Ratio parameter	Elastic modulus (MPa)	Stress (MPa)	Strain (%)	Peak specific energy (MJ/m^3)
1	1 : 4	1140.24	8.21	0.9624	0.03449	0.546
2	1 : 6	769.2	5.18	0.8986	0.01851	0.563
3	1 : 8	532.33	2.66	0.8039	0.00846	0.564
4	1 : 10	371.13	2.02	0.7212	0.00606	0.556
5	1 : 12	328.06	1.35	0.7066	—	0.597
6	1 : 15	282.74	0.99	0.7028	0.00350	0.497
7	1 : 20	169.21	0.67	0.6609	0.00207	0.527