2008g-202 accidents china coalmineaccidents coalminers coalminesandmining communityparticipation congresses congrès engineering healthandhygiene humanengineering internationalcooperation investigation lawandlegislation laws legalstatus mesures mineaccidents mineralindustries miners mines minesandmineralresources minesanitation mining miningengineering mortality occupationalhealth peru prevention radiation radiationmonitoring radiationprotection safetymeasures sanpedrodetongos standards sécurité techniqueminière technology tn295 wa400r586p2006