1. The road was blocked by a rockfall.

2. The rockfall lasted at least a minute.

3. It is thought that the avalanche was started by a small rock-fall on the higher slopes.

4. Jagged boulders from rockfalls triggered by ice and rushing water made progress difficult.

5. Particularly disastrous, but not uncommon, have been the effects of landslips and rock-falls into bodies of water.

6. The scale of this rockfall certainly suggests that there will continue to be collapses on this popular buttress.

7. On the other hand, study of rockfall doesn't comply with the characters of safe net system.

8. Finally based on the results of rockfall trace calculation combined with the characters of safe net system, the authors presented the conception and method of design of safe net system.

9. To study safe net system, on the one hand, much attention is paid to system itself without care of characters of rockfall trace and initial motional parameters.

10. As Chinese railroading is developing rapidly, more demands for safe railway transportation has been presented, and it is completely necessary to build a railway's rockfall monitoring system.

11. She says he had been complaining about the safety of the mine even before the rockfall.

12. He left the mine just a few minutes before a rockfall blocked their exit.

13. Many of the miners' relatives came to the site as soon as they heard of the rockfall and set up camp at the minehead.

14. Perilous rock is one of main geologic disasters in mountain area of China. Safe net system is a passive control technique for rockfall in recent years.

15. Maria cannot forget that Dario was not due to work the shift when the rockfall happened.

16. In order to discuss disaster degree and hazard risk of perilous rock on road slope,(http:///rockfall.html) a numerical analysis method was used to calculate full motion trace of the perilous rockfall along road slope.

17. Only a month before the accident, Gino Cortez, 40, lost his left leg in a rockfall.