Submit an Article
Become a reviewer
Vol 150 No 1
Pages:
72-74
Download volume:

Development of methods for calculating average loads on cylindrical shaft support

Authors:
N. S. Kononova1
P. A. Demenkov2
About authors
  • 1 — Student, research assistant G.V. Plekhanov Saint Petersburg Mining University
  • 2 — Student, research assistant G.V. Plekhanov Saint Petersburg Mining University
Date submitted:
2001-06-06
Date accepted:
2001-07-24
Date published:
2002-01-01

Abstract

Field observations show that the distribution of stresses around mine workings is uneven both in transverse and longitudinal directions. To take into account this distribution of stresses, we consider the interaction of the mine support with the surrounding rock massif. The roof support is considered as an elastic long closed cylindrical shell. The load acting on the shoring changes irregularly both along the shell and in the transverse direction: p = p(x,0), where x is the distance along the generatrix expressed in fractions of the radius; 9 is the central angle expressed in radians. Then, two cases can be considered: the support is under the action of axisymmetric radial load depending only on one variable x, the support is subjected to load depending only on the angle 9 The solution of the problem for the load of the form P = p(x, 9) is obtained by summing up these two solutions. Let's estimate average loads on a roof support for typical conditions of shaft construction in the elastic mode of interaction: R 0 = 3.0; R l = 3.5 m; R - 3.25 m; h - 0.5 m; Vj = 0.25; / = 0; v - 0.25; = 2 - 10 4 MPa; £ = 2 - 10 4 MPa Thus, when modeling vertical shaft support by a closed cylindrical shell the calculated average load is three times less than the corresponding value for a flat problem.

Go to volume 150

Similar articles

Simulation of a vertical hydraulic transport system with a submerged capsule
2002 I. A. Chilikin
Algorithm and information processing hardware of the DC drive laboratory bench
2002 D. M. Beznosenko
Music in the life and work of the Decembrists
2002 A. V. Zelenov
Application of georadiolocation method for nondestructive control of the condition of hard-type roads
2002 A. I. Kulikov
Hydraulic transport of highly concentrated water-coal slurries
2002 V. A. Svirskii
Selection of settings of digital overhead line protection devices with insulated wires
2002 Yu. M. Borodyanskii