摘要：本发明公开了一种基于围岩分区破裂演化分析的深埋洞室开挖施工方法，包括步骤：一、洞室开挖；二、围岩基本力学参数确定；三、围岩分区破裂演化分析：对当前所施工洞室进行围岩分区破裂演化分析，并根据分析结果对开挖完成后当前所施工洞室围岩上所存在破裂区的数量M和各破裂区的厚度分别进行确定；步骤四、径向注浆加固：沿纵向延伸方向由后向前分多次对当前所施工洞室进行围岩径向注浆加固；每次进行围岩径向注浆加固时，采用注浆管对M个破裂区分别进行注浆加固。本发明步骤简单、设计合理且实现方便、使用效果好，根据围岩分区破裂演化分析结果有目的地进行围岩径向注浆加固，能有效确保洞室围岩稳定性及洞室开挖施工的安全性。

Abstract： The invention discloses a construction method of deeply buried tunnel chamber excavation based on analysis of partition fracture evolution of surrounding rock. The construction method comprises the steps that 1, the tunnel chamber excavation is performed; 2, basic mechanical parameters of the surrounding rock is determined; 3, the analysis of the partition fracture evolution of the surrounding rock is performed, specifically, the fracture evolution analysis of the surrounding rock is carried out for an existing constructed tunnel, based on the analysis results, the number of fracture zones M and the thickness of each fracture zone on the surrounding rock of the existing constructed tunnel are determined after excavation; and 4, radial grouting reinforcement is performed, specifically, theradial grouting reinforcement of the surrounding rock of the existing constructed tunnel is carried out for multiple times along the longitudinal extension direction from back to front, every time theradial grouting reinforcement of the surrounding rock is carried out, grouting pipes are used for conducting the grouting reinforcement of the M fractured zones separately. The construction method ofthe deeply buried tunnel chamber excavation based on the analysis of partition fracture evolution of the surrounding rock is simple in steps, reasonable in design, convenient to realize and good in using effect, can perform the radial grouting reinforcement of the surrounding rock purposefully according to the analysis results of the partition fracture evolution of the surrounding rock, and can effectively ensure the stability of the surrounding rock of the tunnel chamber and the safety of tunnel chamber excavation construction.