Table 6.

Details of the effects of karst width.

Case	L	R	U	B	Thickness of karst (B–U)/m	Width of karst (R–L)/m
1	− 5	− 4, − 3…52	1	5	4	1 ~ 57
2	− 2	− 1, 0, 1…52
3	0	1, 2, 3…52
4	2	3, 4, 5…52
5	3	4, 5, 6…52
6	5	6, 7, 8…52
7	6	7, 8, 9…52
8	7	8, 9…52
9	8	9, 10…52
10	9	10, 11…52
11	10	11, 12…52
12	12	13, 14…52