Aquiclude Stability Evaluation and Significance Analysis of Influencing Factors of Close-Distance Coal Seams: A Case Study of the Yili No. 4 Coal Mine in Xinjiang, China

Table 6

Simulation scheme design.

Scheme	Upper coal seam mining height (m)	Lower coal seam mining height (m)	Seam spacing (m)	Empty column
1	3	5	10	1
2	3	9	20	2
3	3	13	30	3
4	6	5	20	3
5	6	9	30	1
6	6	13	10	2
7	9	5	30	2
8	9	9	10	3
9	9	13	20	1