A Practical Nonprobabilistic Reliability Assessment Method on Key Strata Shear Failure in Longwall Mining

Table 1

HI triaxial strain testing result.

Principal stress type	Value (MPa)	Azimuthal angle (°)	Dip angle (°)	Vertical stress (MPa)
	17.5	220	−9	12
	13.7	−55	29
	9.6	146	58