Abstract: The The deformation control of soft rock roadways is inherently challenging, and post-failure repair is difficult; these issues have become critical constraints on the safe operation of the No. 850 combined transportation roadway for track and belt systems in Xinbai Coal Mine. In response to this problem, a systematic investigation was conducted on the deformation and failure characteristics, primary failure-inducing factors, and surrounding rock control technology and schemes for a large-section cross-cutting raise in soft rock. The study integrated theoretical analysis, numerical simulation, and in-situ measurements to ensure comprehensive evaluation. The results indicate that several key factors significantly contribute to the instability of the surrounding rock. Specifically, the high content of argillaceous soft rock leads to pronounced weakening upon water exposure due to argillization; moreover, the mutual disturbance among adjacent roadways in the excavation zone results in an elevated stress level within the surrounding rock; in addition, the original support scheme failed to effectively mobilize the load-bearing capacity of the support system. These factors collectively act as dominant failure-inducing factors for large-section cross-cutting soft rock roadways. Based on these findings, a surrounding rock control technology centered on enhancing the residual strength of the rock mass was proposed. Accordingly, an optimized support scheme was developed, consisting of initial shotcrete sealing, primary bolt-mesh support, secondary shotcrete sealing, and secondary bolting and cable support. Field application of the optimized scheme demonstrates that no significant deformation occurred in the roadway ribs and roof, and the support structure remained in a stable condition, thereby satisfying the control requirements of the roadway.