Subsidence Pits
Caused by the collapse of rock layers above an abandoned coal mine. Subsidences can manifest as pits, holes, or troughs. In addition, vertical shafts and abandoned mine openings can pose a threat of collapse.
Caused by the collapse of rock layers above an abandoned coal mine. Subsidences can manifest as pits, holes, or troughs. In addition, vertical shafts and abandoned mine openings can pose a threat of collapse.