Strain Rate Effect on Mechanical Properties of Cemented Backfill under Dynamic and Static Combined Loading
Table 2
Calculation results of three-dimensional dynamic and static combined impact energy of cemented backfill.
Specimen number
IP (MPa)
Φ (mm)
H (mm)
EI (J)
ER (J)
ET (J)
EA (J)
ED (J·cm−3)
(s−1)
DCS (MPa)
GLSp
CTB230-1
0.40
50.02
49.89
96.4
83.51
5.59
8.30
0.136
62.3
12.51
0.0163
CTB230-2
0.45
50.00
50.04
121.1
102.73
8.29
10.08
0.133
65.8
16.08
0.0175
CTB230-3
0.50
49.98
49.95
165.9
140.19
11.78
13.93
0.142
82.2
17.07
0.0235
CTB230-4
0.55
50.05
49.99
207.1
173.76
16.36
16.98
0.173
86.8
17.96
0.0238
CTB310-1
0.40
49.87
50.11
89.8
72.20
5.21
12.39
0.127
61.1
10.81
0.0159
CTB310-2
0.45
49.94
49.87
131.6
107.25
8.55
15.80
0.162
67.2
12.02
0.0183
CTB310-3
0.50
50.03
50.00
172.8
142.21
14.69
15.90
0.164
81.0
16.80
0.0227
CTB310-4
0.55
50.06
50.10
210.7
181.41
11.18
18.11
0.184
85.6
19.08
0.0231
In order to avoid the contingency and discreteness of the test, each group of specimens should be tested three times and the average value should be taken.
