Issue 49

A. Baryakh et alii, Frattura ed Integrità Strutturale, 49 (2019) 257-266; DOI: 10.3221/IGF-ESIS.49.25

As an example problem, we consider the Upper Kama salt deposit Russia, Perm Krai, which is a layered rock mass mined out by the room-and-pillar method. A computational scheme of the problem with account of symmetry about the y axis is given in Fig. 3. The characteristics of the geological section and the mechanical properties of the examined layers are presented in Tab. 2.

Figure 3 : The computational scheme of multilayers system

№.

Bed, stratum

Thickness of layer, m

Modulus of deformation E, GPa

Poisson's ratio 

Specific weight , / КН м 

3

1 2 3 4 5 6 7 8 9

Q

9.1

0.10 0.70 1.20 0.30 0.80 1.20 0.94 0.91 0.89 0.92

0.30 0.30 0.30 0.40 0.30 0.30 0.31 0.31 0.31 0.31 0.35 0.30 0.35 0.30 0.35 0.30 0.30 0.30

20 23 24 22 22 22

PTs

18.3 50.0 48.0

TKT SMT

PP

-

PKS

20.0

K, I-K

5.6 5.7 5.1 3.7

21.8 21.7 21.6 21.7

I, Z-I

Z, ZH-Z

10

ZH, E ZH

11 12 13 14 15 16 17 18

E

10.7

0.50

20 22 20 22 20 22 22 22

D-E

4.0

1.0

D

13.0

0.50

G-D

3.0

1.0

G

13.0

0.50

V-G

5.

1.0

V

10.0

0.60

B-V

4.5

1.0

Table 2 : Physical and mechanical properties of rocks

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