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

Table 4

Calculation values of strength and elastic parameters for anhydrite and neighboring layers used for numerical calculations [13].

Rock mass type	𝑅𝑐 (MPa)	𝑅𝑟 (MPa)	𝑐 (MPa)	𝜑 (deg)	𝐸 (MPa)	𝜈 (−)
Sandstone	6.43	0.06	2.1	30.1	44.7	0.26
Shale	1.47	0.003	0.6	24.7	1.3	0.29
Anhydrite upper	16.51	0.20	4.2	34.3	11.3	0.24
Anhydrite lower	27.55	0.36	6.3	37.6	18.3	0.23
Dolomite, limestone	105.0	1.49	20.0	53.3	67.5	0.18

𝑅_𝑐: uniaxial compressive strength; 𝑅_𝑟: uniaxial tension strength; 𝑐: cohesion; 𝜑: internal friction angle; 𝐸: Young's modulus; 𝜈: Poisson ratio.