sec.322Preventing dangerous subsidence

### sec.322 Preventing dangerous subsidence This section applies if coal extraction at an underground mine is likely to cause subsidence resulting in an unacceptable level of risk. The site senior executive for the mine must ensure— the amount of coal extracted does not cause the subsidence; and appropriate measures are taken to ensure the long-term stability of the surface. leaving blocks of the coal seam, of sufficient dimensions, unmined (sec.322-ssec.1) This section applies if coal extraction at an underground mine is likely to cause subsidence resulting in an unacceptable level of risk. (sec.322-ssec.2) The site senior executive for the mine must ensure— the amount of coal extracted does not cause the subsidence; and appropriate measures are taken to ensure the long-term stability of the surface. leaving blocks of the coal seam, of sufficient dimensions, unmined - (a) the amount of coal extracted does not cause the subsidence; and - (b) appropriate measures are taken to ensure the long-term stability of the surface. Example of appropriate measures— leaving blocks of the coal seam, of sufficient dimensions, unmined