Table 4 Statistics of stope stability probabilities with different exposure times.

From: Collaborative optimization of the Mathews stability graph method and numerical simulation for the limit exposure area in stope

Scheme number

f(y) (%)

 < 3 months

3–5 months

5–12 months

 > 12 months

N*

f(y)* (%)

N*

f(y)* (%)

N*

f(y)* (%)

N*

f(y)* (%)

1

89

2.95

87

1.85

82

1.11

76

0.74

69

2

86

84

79

71

64

3

84

82

76

67

60

4

82

79

73

64

56

5

80

77

70

61

53

6

88

86

81

74

67

7

85

83

77

69

62

8

82

80

73

64

57

9

80

77

70

61

53

10

78

75

67

58

50

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