Research on Surrounding Rock Control Technology of Dongbaowei Deep Mining Roadway

Table 1

Test results of mechanical parameters.

Roadway strata	Test piece number	Density (kg·m^−3)	Elastic modulus (GPa)	Poisson ratio	Uniaxial compressive strength (MPa)	Uniaxial tensile strength (MPa)	Shear strength (MPa)
No. 41 coal seam of 350 m elevation	QM1	1343.52	2.23	0.36	11.71	1.68	6.85
	QM2	1347.85	2.35	0.35	13.57	1.85	7.45
	QM3	1335.54	2.16	0.37	12.51	1.74	7.25
No.41 coal seam of 660 m elevation	SM1	1365.21	2.56	0.37	10.21	1.56	6.51
	SM2	1368.20	2.98	0.39	9.54	1.34	6.86
	SM3	1335.42	2.78	0.34	9.24	1.38	6.41
Roadway roof of 350 m elevation	SY1	2784.21	19.65	0.18	72.65	10.02	54.39
	SY2	2618.07	16.9	0.15	77.13	11.25	53.295
	SY3	2616.36	18.88	0.16	97.12	13.11	39.66
Roadway roof of 660 m elevation	QY1	2596.33	21.34	0.17	52.91	10.06	32.805
	QY2	2765.06	22.55	0.15	71.37	13.85	50.52
	QY3	2675.24	20.54	0.16	66.38	13.21	38.88