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Abstract In order to solve the support and construction technical problems occurred in 1642(1) large-sectioned open-off cut of Pansan Mine, and realize the prompt succeed among working faces, the support mechanism of large-sectioned open-off cut was analyzed, and furthermore, the collaborative support program consist of anchor-cable, T3 steel strip and joist cantilever beam suited with single hydraulic bracket was put forward. Besides, according to the comparison of advantages and disadvantages of disposable and secondary roadway formation, the final construction program, including graded alternately tunneling and disposable roadway formation, were adopted and achieved good social and economic benefits, which further provided reference for roadway construction in large-section open-off cut under similar conditions.
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