Table 2 Site blasting vibration velocity monitoring data.

First blast

Monitoring points

1–1

1–2

1–3

1–4

1–5

1–6

1–7

Free surface area (m²)

51.03

Blast distance (m)

42

55

68

80

95

120

135

Peak vibration velocity (cm/s)

7.847

6.415

4.980

4.077

2.977

2.621

1.350

Second blast

Monitoring points

2–1

2–2

2–3

2–4

2–5

2–6

2–7

Free surface area (m²)

52.21

Blast distance (m)

45

58

71

83

98

123

138

Peak vibration velocity (cm/s)

7.275

4.819

3.749

3.118

2.727

2.500

1.290

Third blast

Monitoring points

3–1

3–2

3–3

3–4

3–5

3–6

3–7

Free surface area (m²)

51.47

Blast distance (m)

48

61

74

86

101

126

141

Peak vibration velocity (cm/s)

6.330

4.551

3.707

2.701

2.653

2.356

1.123

Fourth blast

Monitoring points

4–1

4–2

4–3

4–4

4–5

4–6

4–7

Free surface area (m²)

58.15

Blast distance (m)

66

79

92

104

119

144

159

Peak vibration velocity (cm/s)

4.556

2.459

2.616

1.675

1.585

1.169

0.611

Fifth blast

Monitoring points

5–1

5–2

5–3

5–4

5–5

5–6

5–7

Free surface area (m²)

58.24

Blast distance (m)

69

82

95

107

122

147

162

Peak vibration velocity (cm/s)

4.071

3.210

2.259

1.934

1.250

0.801

0.362