1988年5月2日,我矿新1号竖井发生一起断绳事故。该竖井为双罐笼提升井。5月2日4时,2号罐笼自1460中段(位于井底)提运矿车,刚刚提升2m左右,钢丝绳突然破断,罐笼坠入井底水仓。经检查,钢丝绳破断位置在桃形环上方第1个绳卡下沿。第2个绳卡下沿亦断丝5根,第3个绳卡下沿断丝1根,第6个绳卡上沿断丝4根,第7个绳卡上沿断丝9根。据分析,事故的主要原因有以下几个方面: (1)钢绳安全系数偏小。根据《冶金矿 May 2, 1988, I mine a new shaft occurred a broken rope accident. The shaft is a double cage hoistway. At 4:00 on May 2, No. 2 cage from 1460 mid-section (located at the bottom of the well) to lift the transport car, just raised 2m or so, the wire rope suddenly broken cages crashed into the bottom of the water tank. After examination, the broken position of the rope in the peach ring above the first rope card along. The second rope along the card along the broken wire 5, the third rope along a broken wire, the sixth rope along the broken wire 4, the first seven rope along the broken wire 9. According to analysis, the main reasons for the accident are the following aspects: (1) rope safety factor is small. According to "Metallurgy