. "absence, in the vicinity of any workings carried on or proposed to be carried on in the mine of:(i) any disused workings (whether mine workings or not):(ii) any rock or stratum containing or likely to contain water (whether dispersed or in natural cavaties;(iii) any peat, moss, sand, gravel, silt or other material that is likely to flow when wet; and(b) of taking such steps as may be necessary for" . . . . .