唐口煤矿井下联络带过断层破碎带支护优化设计研究

Research on Optimized Support Design for Fault Zone Breccia Belts in Underground Connecting Galleries at Tangkou Coal Mine

摘要: 本文以唐口煤矿联络巷穿越断层破碎带为工程背景，针对过断层巷道围岩破碎、应力复杂、变形量大等突出问题，系统开展支护优化设计研究。在分析断层影响区围岩变形特征的基础上，综合运用地质评估和理论计算，提出一套以高强锚杆与锚索为核心，结合超前管棚、注浆与U型钢棚复合支护的优化设计方案。通过锚杆与锚索参数的理论计算与强度验算，确定了合理的支护参数，并对U型钢棚进行了结构强度与稳定性校核。验算结果表明，该支护优化设计可以有效控制围岩变形，能够实现“主动承载”与“协同支护”的有效结合。本文研究的相关结论与关键技术，对今后类似地质条件下的巷道掘进实践具有重要的指导意义和技术支撑。

Abstract: This paper presents an engineering case study of the Tangkou Coal Mine connecting drift traversing the fault zone. Addressing prominent challenges such as fractured rock mass, complex stress conditions, and significant deformation along the fault-crossing drift, systematic research was conducted on optimised support design. Building upon an analysis of rock mass deformation characteristics within the fault influence zone, this study integrates geological assessment and theoretical calculations to propose an optimized support scheme. This scheme centres on high-strength rock bolts and rock bolts, complemented by advance pipe arches, grouting, and composite U-shaped steel arch support. Theoretical calculations and strength verification of rock bolt parameters established optimal support specifications, while structural strength and stability checks were performed on the U-shaped steel arches. Verification results demonstrate that this optimized support design effectively controls surrounding rock deformation, achieving an effective combination of “active load-bearing” and “cooperative support”. The conclusions and key technologies explored in this study provide significant guidance and technical support for future tunnel excavation practices under similar geological conditions.