Collaborative Control Technology of Crosscut Floor Heave in Soft Rocks under Deep High Horizontal Stress

Table 2

Mineral composition contents of rock samples.

Mineral	Rock sample
	1^# fine sandstone (%)	2^# mudstone (%)	3^# sandy mudstone (%)	4^# middle-fine sandstone (%)
Kaolinite	29.5	63.2	43.1	24.7
Quartz	37.6	17.6	25.2	35.2
Illite	7.2	5.6	8.1	6.9
Smectite	2.6	2.4	2.2	2.8
Illite/smectite formation	13.8	7.3	14.7	16.8
Feldspar	1.8	0.4	3.1	2.4
Siderite	4.7		0.3	8.2
Calcite	0.5	0.3	0.3	0.6
Pyrite		0.6	1.1	0.2
Others	Remain	Remain	Remain	Remain