Simulation of the Compressive Strength of Cemented Tailing Backfill through the Use of Firefly Algorithm and Random Forest Model

Table 1

Testing results of two types of cement.

Cement	Fineness (<0.0045 mm) (%)	Initial solidification (min)	Final solidification (min)	Compressive strength (28 days) (MPa)	Flexural strength (28 days) (MPa)
Shangfeng cement	23.2	240	305	30.7	6.5
Ma’an cement	6	180	255	39.8	8