摘要：本發明公開了一種基于圍巖分區破裂演化分析的深埋洞室開挖施工方法，包括步驟：一、洞室開挖；二、圍巖基本力學參數確定；三、圍巖分區破裂演化分析：對當前所施工洞室進行圍巖分區破裂演化分析，并根據分析結果對開挖完成后當前所施工洞室圍巖上所存在破裂區的數量M和各破裂區的厚度分別進行確定；步驟四、徑向注漿加固：沿縱向延伸方向由后向前分多次對當前所施工洞室進行圍巖徑向注漿加固；每次進行圍巖徑向注漿加固時，采用注漿管對M個破裂區分別進行注漿加固。本發明步驟簡單、設計合理且實現方便、使用效果好，根據圍巖分區破裂演化分析結果有目的地進行圍巖徑向注漿加固，能有效確保洞室圍巖穩定性及洞室開挖施工的安全性。

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.