(一)、Ⅴ类加强段类围岩开挖与支护 施工顺序:超前管棚→侧壁导坑上部打眼→装药爆破→通风、找顶→初喷混凝土封闭岩面→出碴→测量→立拱架、挂钢筋网→施做系统锚杆→复喷至设计厚度→进入下一循环→(待超前2.5—3m后)→侧壁导坑下部打眼→装药爆破→通风、找顶→初喷混凝土封闭岩面→出碴→测量→立拱架、挂钢筋网→施做系统锚杆→复喷至设计厚度→进入下一循环
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(一)、Ⅴ类加强段类围岩开挖与支护 施工顺序:超前管棚→侧壁导坑上部打眼→装药爆破→通风、找顶→初喷混凝土封闭岩面→出碴→测量→立拱架、挂钢筋网→施做系统锚杆→复喷至设计厚度→进入下一循环→(待超前2.5—3m后)→侧壁导坑下部打眼→装药爆破→通风、找顶→初喷混凝土封闭岩面→出碴→测量→立拱架、挂钢筋网→施做系统锚杆→复喷至设计厚度→进入下一循环
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