safety work practices construction miner wearing safety harness disposable protective clothing

afety work practices construction miner wearing safety harness disposable protective clothing connecting karabiner attached loop rescue precaution entering confined spaces spacess atmosphere atmospheric australia background black blue closeup concept confined construction control conveyor danger design dirty disposable donetsk engineering equipment gas green heavy helmet illnesses incident industrial industry isolated light machine machinery male material miner occupation people personnel plant preventing professional protection clothing rescue restricted area safety security site space structure worker