Table 4 BIM index of coal and rock at different strain rates.

From: Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates

Strain rate /s-1

A1/kJ m-3

A2/kJ m-3

BIM

1 × 10–5

25.72

34.87

1.35

1 × 10–4

15.87

16.89

1.06

1 × 10–3

7.61

13.86

1.82

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