Research on Key Technologies of Floor Heave Control in Soft Rock Roadway

Table 1

Quantitative analysis of the chemical composition of bottom rock formations (%).

Sample	SiO2	Al2O2	Fe2O2	FeO	Fe2O2/FeO	CaO	MgO	K2O	Na2O	TiO2
1	55.54	17.71	12.81	0.86	14.89	0.23	0.40	1.02	0.02	1.37
2	61.23	15.74	5.05	0.95	5.32	0.30	0.94	1.23	0.09	1.80
3	46.81	17.38	1.75	10.24	0.17	1.26	0.87	1.61	0.07	1.58
4	53.62	29.03	1.22	0.18	6.78	0.36	0.45	——	——	1.59
5	66.70	16.04	13.36	0.18	74.22	0.17	0.26	2.49	0.09	1.59
6	53.23	20.93	10.53	0.18	58.50	0.17	1.03	2.29	0.06	1.54
7	60.03	14.86	12.63	0.18	70.17	0.06	1.11	2.06	0.11	1.54