Water Inrush Risk Assessment Based on AHP and Advance Forecast Approach: A Case Study in the Micangshan Tunnel

Table 1

Meaning of 1–9 scales.

Scale	Meaning
1	i has the same importance, or i or j compares to itself
3	i is slightly more important than j
5	i is obviously more important than j
7	i is much more important than j
9	i is extraordinarily more important than j
2, 4, 6, 8	Scales between two consecutive scales given above
Reciprocal	Contrast to the above condition, namely, j is more important than i