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根据华东地区立井井壁破坏位置、地层条件及破坏时间，对立井井壁破坏特征进行分析。初步分析表明立井井壁破坏的主要原因，是立井井壁和周围地层间垂直方向上相对运动产生井壁外侧面向下的“井壁负摩擦力”，造成井壁内应力超过原来设计中取无负摩擦力时的允许值，导致井壁破坏。根据华东地区立井井壁破坏位置、地层条件及破坏时间，对立井井壁破坏特征进行分析。初步分析表明立井井壁破坏的主要原因，是立井井壁和周围地层间垂直方向上相对运动产生井壁外侧面向下的“井壁负摩擦力”，造成井壁内应力超过原来设计中取无负摩擦力时的允许值，导致井壁破坏。
According to the damage location, stratum condition and failure time of vertical shaft wall in East China, the damage characteristics of vertical shaft wall are analyzed. The preliminary analysis shows that the main reason for shaft wall damage is the negative “negative wall friction” caused by the relative movement in the vertical direction between shaft wall and the surrounding strata, resulting in the stress in the shaft lining exceeding the original design No negative friction allowable value, resulting in damage to the shaft wall. According to the damage location, stratum condition and failure time of vertical shaft wall in East China, the damage characteristics of vertical shaft wall are analyzed. The preliminary analysis shows that the main reason for shaft wall damage is the negative “negative wall friction” caused by the relative movement in the vertical direction between shaft wall and the surrounding strata, resulting in the stress in the shaft lining exceeding the original design No negative friction allowable value, resulting in damage to the shaft wall.