| Abstract: |
| 1. |
A working and a rock mass around it may be defined by one dimensionless parameter λ≥0. This parameter predetermines the behavior
of the rock mass with any changes of mine pressure and support resistance.
|
| 2. |
With 0≤λ<1 prediction of the behavior is clear: Reaction of the rock mass to any changes in mine pressure and support resistance
will have a stable character.
|
| 3. |
If λ>1 then stability for the reaction is only retained up to a certain critical condition. Parameters of the critical condition
depend on mine pressure, the degree of weakening at contacts between blocks, geometrical dimensions and elasticity moduli.
With a changeover through the critical condition there is uncontrolled dynamic release of potential elastic energy for the
rock mass.
|
Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 37–43, January–February, 1991. |
