Research on Deformation Mechanisms of a High Geostress Soft Rock Roadway and Double-Shell Grouting Technology

Table 4

Clay mineral relative content of the surrounding rock.

Lithology	Clay mineral relative content (%)						Mixed layer than (%)
	S	I/S	It	Kao	C	C/S	I/S	C/S
Mudstone	/	58	15	19	8	/	40	/
Shale	/	58	12	30	/	/	50	/

S: smectite; I/S: illite-smectite layer-mixed; It: illite; K: kaolinite; C: chlorite; C/S: chlorite -smectite layer-mixed.