Study on the Evolution Characteristics of Surrounding Rock and Differentiated Support Design of Dynamic Pressure Roadway with Double-Roadway Arrangement

作者：Linjun Peng, Shixuan Wang, Zhang We, Weidong Liu, Dazhi Hui · 发表于：Applied Sciences · 年份：2025 · DOI：10.3390/app15137315 · 被引用次数：1 · 研究领域：Rock Mechanics and Modeling、Geomechanics and Mining Engineering、Grouting, Rheology, and Soil Mechanics

To elucidate evolutionary characteristics of the surrounding rock failure mechanism in a double-roadway layout, this work is grounded on in the research context of the Jinjitan Coal Mine, focusing on the deformation and failure mechanisms of double roadways. This paper addresses the issue of resource wastage resulting from the excessive dimensions of coal pillars in prior periods by employing a research methodology that integrates theoretical analysis, numerical simulation, and field monitoring to systematically examine the movement characteristics of overlying rock in the working face. On that basis, the size of coal pillar is optimized. The advance’s stress transfer law and deformation distribution characteristics of the return air roadway and transport roadway are studied. The cause of the asymmetric deformation of roadway retention is explained. A differentiated design is conducted on the support parameters of double-roadway bolts and cables under strong dynamic pressure conditions. The study indicates that a 16 m coal pillar results in an 8 m elastic zone at its center, balancing stability with optimal resource extraction. In the basic top-sloping double-block conjugate masonry beam structure, the differing stress levels between the top working face’s transport roadway and the lower working face’s return air roadway are primarily due to the varied placements of key blocks. In the return air roadway, floor heave deformation is managed using locking anchor rods, while roof...