Mining width/m

10

20

25

30

35

40

50

Data collection number

1 - 22

23 - 51

52 - 73

74 - 113

114 - 148

149 - 170

171 - 229

Mining width/m

60

65

75

80

90

100

110

Data collection number

230 - 278

279 - 356

357 - 376

377 - 419

420 - 451

452 - 469

470 - 509