Study on the Fractal Characteristics of Coal Body Fissure Development and the Law of Coalbed Methane Migration of around the Stope

Table 2

Grid distances.

Grids	Vertical distance from coal seam No.8’s floor (m)	The distance from foot of perpendicular to coal seam No.8’s opening (m)	Grids	Vertical distance from coal seam No.8’s floor (m)	The distance from foot of perpendicular to coal seam No.8’s opening (m)
1-1	93.73	71.03	1-2	99.52	94.96
2-1	74.87	76.53	2-2	80.66	100.46
3-1	56.01	82.03	3-2	61.80	105.96
4-1	37.15	87.53	4-2	42.94	111.46
5-1	18.29	93.03	5-2	24.08	116.96