Mining width/m

10

20

25

30

35

40

45

Data collection number

0 - 5

6 - 10

11 - 12

13 - 34

35 - 47

48 - 59

60 - 68

Mining width/m

50

55

60

70

80

85

Data collection number

69 - 76

77 - 106

107 - 128

129 - 154

155 - 331

332 - 400