| Falls, electrocutions, falling objects, trench cave-ins, equipment mishaps and vehicular accidents combined to kill hundreds of people on the job. |
| Shoring up vertical trench walls and shielding workers from cave-ins are more than just sound excavating safety practices. |
| The government has repeatedly vowed to do more to crack down on safety violations, but explosions, floods, gas leaks, cave-ins and other disasters are reported every week. |
| Newspaper reports talk of mine cave-ins and shaft collapses. |
| They go deeper and deeper underground, with cave-ins making rescue impossible, completing the classical haunted house structure. |
| Surface subsidence also causes safety concerns for the public because of roadway cave-ins or structures and buildings tilting or even collapsing. |
