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介绍一种较为成功的立井井壁治理所采用的环形卸压沟槽切割控制爆破开切技术。成功的经验表明:在夹制作用较大的钢筋混凝土井壁中开切深宽比在1.5～2.0的窄沟槽,此方法具有快速、高效和安全的特点,可在类似工程中应用。
This paper introduces a more successful control technology of annular pressure relief trench cutting and controlled blasting used in shaft lining management. The successful experience shows that this method is fast, efficient and safe, which can be applied in similar projects because of the narrow groove with aspect ratio of 1.5 ~ 2.0 in the reinforced concrete shaft wall with large clamping capacity.