关键词: 巷道, 围岩, 稳定性分类, 支护对策

Abstract: The existing stability classification method of roadway surrounding rock in Baixiangshan iron ore is unable to effectively guide the roadway supporting design.For this situation，based on ground penetrating radar and physical mechanical test of surrounding rock，and comprehensively using metallurgical mines bolt-shotcrete support roadway surrounding rock classification and roadway surrounding rock loose circle classification methods，the comprehensive classification table of surrounding rock stability in roadway and the standard for scheme selection of the roadway support in Baixiangshan iron ore were produced.Based on the roadway surrounding rock′s stability of Baixiangshan iron ore，surrounding rocks are divided into five types from I to V：class I is stable，which is generally not entitled to support or just jetting 50~60 mm concrete for enclosing.Class V is extremely instable，which is generally supported by rebar anchors of 20~22 mm in diameter，2 200~2 400 mm in length，steel ladder (mesh) and anchor cable，and also by considering steel bracket for reinforce support，laying inverted arch at the roadway floor and full-face curtain grouting for advance support.The project practice shows that for the roadway supporting design based on scheme selection of the roadway support of Baixiangshan iron ore，selecting reasonable support form and parameters for different category of roadway surrounding rock can effectively control the converging deformation of the roadway surrounding rock and ensure its long-term security and stability.It has high engineering value.

Key words: Roadway, Surrounding rock, Stability classification, Support measures