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1986年8月1日下午2点30分,唐山市东矿区水浴乡赵西煤井,发生了塌井事故,50 m深的井筒一下子塌了20多米,使煤井遭受巨大损失。
At 2:30 pm on August 1, 1986, a well collapse occurred in the Zhao Xi coal mine of Shuibuxiang Township in the east mining area of Tangshan City. At a depth of 50 m, the well bore suddenly collapsed by more than 20 meters, causing a huge loss to the coal mine.