[Retracted] Study on the Failure Mechanism of Strain Rockburst

Table 1

Basic physical and mechanical parameters of phosphate rock.

Name	/	σc/MPa	ρ/g·cm^−3	E/GPa	φ/°
Phosphate rock	0.26	53.6	2.88	27.1	37.73

Notes: φ-internal friction angle; ρ–density.