Numerical Calculation Analysis of the Structural Stability of Cemented Fill under Different Cement-Sand Ratios and Concentration Conditions

Table 1

Cemented backfill mechanics experiment results.

Lithology	Compressive strength (MPa)	Tensile strength, σt (MPa)	Bulk modulus, K (GPa)	Elastic modulus, E (GPa)	Poisson’s ratio,	Shear modulus, G (GPa)	Internal friction angle, φ (°)	Cohesion, C (MPa)
Lime-to-sand ratio 1 : 6, concentration 68% backfill (program one)	1.167	1.36	0.26	0.25	0.33	0.09	13.8	0.36
Lime-to-sand ratio 1 : 6, concentration 72% backfill (program two)	1.576	0.17	0.29	0.37	0.29	0.14	18.0	0.51
Lime-to-sand ratio 1 : 6, concentration 78% backfill (program three)	2.098	0.19	0.36	0.57	0.24	0.23	20.2	0.61
Lime-to-sand ratio 1 : 8, concentration 68% backfill (program four)	0.797	0.05	0.11	0.1	0.34	0.04	10.2	0.21
Lime-to-sand ratio 1 : 8, concentration 72% backfill (program five)	0.941	0.07	0.14	0.16	0.31	0.06	15.2	0.38
Lime-to-sand ratio 1 : 8, concentration 78% backfill (program six)	1.113	0.93	0.12	0.19	0.25	0.08	18.2	0.521