Table 1 On-site monitoring results of impacting energy caused by basic roof break of the 3301 working face.

From: Assessment of long-term large deformation in deep roadways due to roof fracturing impact loading

Order

Movement stage of main roof

Advancing distances of working face (m)

Source energy (J)

Impacting energy to rail roadway (J)

1

First time break

42

3.38 × 105

4.85 × 103

2

2th break

67

2.15 × 105

2.43 × 103

3

3th break

87

1.98 × 105

2.21 × 103

4

4th break

106

1.86 × 105

2.06 × 103

5

5th break

129

2.11 × 105

2.36 × 103

6

6th break

150

2.02 × 105

2.18 × 103

7

7th break

168

1.88 × 105

1.97 × 103

8

8th break

192

2.20 × 105

2.55 × 103

9

9th break

211

1.90 × 105

2.16 × 103

10

10th break

232

2.10 × 105

2.35 × 103

11

11th break

256

2.18 × 105

2.61 × 103

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