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1996年8月，绵竹市某乡村个体磷矿井下发生一起4人中毒，死亡3人事故。经调查系高浓度二氧化碳（CO2）伴缺氧所致。1中毒经过1996年5月，村民邱某合在本村已关闭多年原磷矿井，重新疏通开采磷矿。8月11日下午1时，矿主邱某带领8名民工进井，用抽水泵抽落笼井底积水，行至落笼口
In August 1996, four people were poisoned and 3 were killed in a phosphate mine in a village in Mianzhu City. Investigated by the Department of high concentrations of carbon dioxide (CO2) with hypoxia. 1 poisoning After May 1996, the villagers Qiumou co-operation in the village has closed many years of the original phosphate mine, to clear the mining of phosphate rock. At 11 o’clock on the August 11, Qmou lead a group of eight workers into the well, with a suction pump down the bottom of the cage water, to the cage mouth