The anchor rod, anchor cable and monomer support principle, construction parameter confirmation and construction method in large span open-off cut construction are introduced in this article. Through the successful practice in large span open-off cut, the advantages of combined support and choice are discussed.%介绍在大跨度切眼施工中锚杆、锚索、单体支护原理，施工参数确定及施工方法，通过在大跨度切眼成功实践，论述联合支护优点及选择。
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