Site Assessment for Astroparticle Detector Location in Evaporites of the Polkowice-Sieroszowice Copper Ore Mine, Poland

Table 3

Strength parameters of rock salt and anhydrite with rock salt impurities from the Polkowice-Sieroszowice mine [10].

Parameter	Rock salt	Anhydrite	Anhydrite with impurities
𝑅𝑐 (MPa)	25.3–38.8/20.1–29.7*	92.3	63.84
𝑅𝑐𝑡 (MPa)	57.2/79.47/94.2/**	—	—
𝑅𝑟 (MPa)	0.25/1.0*	4.9	3.8
𝑅𝑠 (MPa)	2.9/2.3*	—	—

∗Perpendicular/parallel to the bedding; ^∗∗𝜎₃=2MPa/𝜎₃=5MPa/𝜎₃=10; 𝑅_𝑐: uniaxial compressive strength; 𝑅_𝑐𝑡: triaxial compressive strength; 𝑅_𝑟: uniaxial tension strength; 𝑅_𝑠: uniaxial shear strength.