本刊1978年第6期曾介绍竖井吊盘自定中心法。我们认为该法还不太理想。我们通过在铜陵凤凰山铜矿混合井井筒工程安装的实践,介绍一种总是能保持垂直度而不跑偏,即不会“卡旁”的安全提升穿绳方法(附图)。比较理想的是两台稳车共同使用一根整条钢丝绳。但若 Journal of No. 6 of 1978 had introduced the self-centering shaft hoist method. We think the law is not ideal. Through the practice of installing well shafts in the mixed shaft of the Fenghuangshan Copper Mine in Tongling, we introduced a safety hoisting and tethering method (with photos) that can always maintain its verticality without deviation, that is, without “card side.” The ideal is the two cars together to use a steady rope. But if