【摘要】 应用结构力学、材料力学理论,证明结合拱的最大弯矩发生在拱顶处,推导出承载拱厚度的计算式,从而建立了不稳定围岩巷道锚杆支护参数设计组合拱计算的理论模型。该模型在东海矿开拓巷道的锚杆支护设计中进行了应用和验证。更多还原

【Abstract】 By using the principles of structure mechanics, material mechanics, the paper proved that the maximum moments appears in the crown and the abutment of combined arch. The caculation formula of the thickness of the load-bearing arch is deduced and on such a basis, a theoretical model for calculating bolt parameters is built in roadway excavated in instablc rocks. The model was a applied and verified in the bolt pattern design in the development tunnels in Donghai Coalmine.更多还原