| 摘要 |
<p>An underground mine ventilation pipe and method of manufacture therefor is provided that is configured and adapted for being stiff enough to handle especially large vacuum pressures, while being lightweight to facilitate handling and installation. The pipe is comprised of an inner and an outer layer of carbon fibre separated by a core layer, preferably of honeycomb. The pipe is treated for fire retardancy. The pipe includes features for reducing static electricity build up on the pipe. This includes an electrical connection between the inner and outer layer of carbon fibre.</p> |
