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我矿采用无底柱分段崩落采矿法,每一个分段都有卸矿溜井。因溜井口未采取有效的安全防护措施,曾发生过人员坠入溜井的恶性事故。
I mine using non-pillar subsidence caving mining method, each section has a discharge chute. Due to slippery wellhead did not take effective safety precautions, there have been catapor personnel fall crap accident.