| Autor: |
Dzyubenko, V. T., Zvorygin, L. V. |
| Zdroj: |
Journal of Mining Science; September 1969, Vol. 5 Issue: 5 p583-586, 4p |
| Abstrakt: |
Investigations have confirmed the principal laws of the effect of rock pressure on shield supports and established the characteristic features of this effect on reinforced-concrete shields. The mean load on a ZhTShch-500 shield is 11.5–13.0 tons/m2, which is 1.3 times greater than the mean loads on timber shield canopies. The overload coefficient of ZhTShch-500 shields is 1.6. Use of the established values in calculations ensures a load-bearing capacity of reinforced-concrete tubular shields equal to 30–35 tons/m2, which should completely eliminate the possibility of failure of the load-bearing members of the canopy. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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