Commentary

20.2 Subsidence caused by brine pumping

MINES, MINERALS AND LANDFILL vol 26(3)
| Commentary

20.2 Subsidence caused by brine pumping

| Commentary

20.2 Subsidence caused by brine pumping

Salt has been extracted in Cheshire since the 17th century by pumping water into the strata, extracting the resultant brine and evaporating it to leave usable salt. Until relatively recently, brine pumping was difficult to control—once the water was put down into the strata, pumping methods were not sophisticated enough to be able to control the disposal of the brine, so that when the brine was extracted, cavities which remained and caused surface subsidence could not be attributed to any particular operator, nor could the exact areas which were liable to subsidence be defined.

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