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

Table 3

Mineral content of the surrounding rock.

Lithology	Mineral content (%)
	Quartz	Feldspar	Anorthose	Calcite	Dolomite	Siderite	Pyrite	Kaolinite	Clay mineral
Mudstone	47.5	1.8	5.0	/	/	/	/	/	45.7
Shale	29.3	0.8	2.6	12.1	/	14.7	1.0	/	39.5