A Slate Tunnel Stability Analysis considering the Influence of Anisotropic Bedding Properties

Table 1

Results of shear tests for slate.

Loading mode		Specimen	(m/s)	(m/s)	(MPa)	(MPa)
Loading mode	Shear angle (°)
(a)	20	L26−1	6208.485	5382.703	17.097	46.964
	30	L4−2	5863.137	4881.301	12.066	20.899
	40	L12−1	5976.078	4690.732	9.809	11.691
	50	L4−1	6196.250	5425.926	10.668	8.952
	60	L20−2	5961.176	5394.035	7.511	4.337
	70	L18−1	6161.290	5405.614	7.468	2.719
(b)	20	L18−2	6196.250	5744.762	19.784	54.355
	30	L24−1	6312.500	5387.368	14.380	24.908
	40	L12−4	6052.157	5118.596	14.287	17.026
	50	L32−1	5872.941	5485.926	13.408	11.250
	60	L16−1	5995.686	5246.316	11.708	6.760
	70	L17−2	6187.917	5324.675	11.362	4.135
(c)	20	L16−3	5842.745	5298.119	21.211	58.276
	30	L31−2	6051.717	5227.719	33.621	58.234
	40	L12−2	5998.462	5109.769	31.839	37.944
	50	L20−1	6272.917	5422.222	36.694	30.790
	60	L32−2	6011.667	5144.333	58.362	33.695
	70	L32−3	5890.221	5254.019	55.212	20.096