| 摘要 |
A portable seismic communication device is disclosed and described. The device can include a tube, a striker, and an adjustable base. The tube can have a lower portion to support an internal gas pressure and an upper portion which can include a contact anvil oriented at a top end of the tube. The striker can be disposed in the tube and can be displaceable along a length of the tube by the internal gas pressure. The adjustable base can be oriented between the tube and a mine floor and can be extendable and retractable to position the anvil in contact with a mine roof (ceiling), such that the striker impacts the contact anvil when displaced by the internal gas pressure to produce an impact energy wave and the contact anvil transmits the impact energy wave to the strata above the device. |
