Table 2. Distribution Characteristics of Fractures in the Three CBM Blocks.

block	length (cm)	width (μm)	density (strip/cm)
Fanzhuang block	2.30–5.73/4.05	6.88–54.33/18.54	3.39–7.30/4.83
Zhengzhuang block	3.60–7.01/4.96	9.00–33.14/15.66	4.40–10.90/6.33
Changzhi block	0.11–1.63/0.45	0.14–48/12.88	2.3–13/5.93