Mechanism and Control of Rockburst Induced by Draining Spatial Islands and Squaring

Table 1

Composite columnar section of the 2202 working face.

Strata	Thickness (m)	Comment
Medium fine sandstone	12.91	The relative water-rich anomaly region of the Zhiluo Formation
Sandy mudstone	12.45
Medium fine sandstone	13.56
Sandy mudstone	13.90
Medium fine sandstone	11.56	The relative water-rich anomaly region of the Yan’an Formation
Sandy mudstone	6.87
2-2 coal seam	6.50