790. Shotfiring at stratified ironstone, shale or fireclay mines.

Subject to a power of exemption1, comprehensive provisions are made for the drilling and cleaning of shotholes at a mine of stratified ironstone, shale or fireclay other than a safety-lamp mine2, the charging of shotholes3, and the firing of shots generally4, electrically5 and by fuse6. Before firing a shot, a shotfirer must give adequate warning if the shot is likely to blow through into another place7 and in any case must: (1) determine the danger zone8; (2) either post sentries or place fences at the entrances to that zone9; and (3) see that everyone has either withdrawn or is