基于Fisher模型围岩稳定性分析方法

Analysis Method of Surrounding Rock Stability Based on Fisher Model

TBM是已经从原始的人工钻爆法发展为半自动化施工的成套型机械设备,然而未能实现完全自动化的根本原因在于隧洞围岩稳定性需要地质工程师现场勘认后进行支护处理。TBM掘进中操控室得出的主推力、刀盘转速、贯入度、平均扭矩等相关参数,是反映刀盘最直接的原始数据,与掌子面围岩稳定性密切相关,利用Fisher判别法将这4组非平衡数据转化为一维线性关系,总结出的围岩稳定性判别函数,全面提高掘进效率。

TBM is a complete set of mechanical equipment that has developed from original manual drilling and blasting method to semi-automatic construction.However,the fundamental reason for the failure of complete automation is that the stability of tunnel surrounding rock needs to be supported by geological engineers after field survey.Relevant parameters such as main thrust,cutter disc speed,penetration and average torque obtained by the control room during TBM excavation are the most direct raw data reflecting the cutter disc and are closely related to the stability of surrounding rocks on the face of the palm.Four groups of non-equilibrium data are transformed into one-dimensional linear relation by Fisher discriminant method,and stability discriminant function of surrounding rock is summarized to improve excavation efficiency in an all-round way.