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- Title
Research on Stress Analysis and Control of Surrounding Rock of Trapezoidal Roadways Based on Complex Variable Theory.
- Authors
Wang, Zhiqiang; Wu, Chao; Luo, Jianqiao; Lv, Wenyu; Shi, Lei; Wang, Peng
- Abstract
Aiming at the problem of the serious deformation of the mining roadways in the trapezoidal section of the coal mine, the method of combining theoretical analysis and field application is used to study the surrounding rock control method of the trapezoidal roadways. The conformal mapping function of the trapezoidal roadways is calculated by the theory of complex change, and then from the analytical solution of the tangential stress distributed in the surrounding rock of trapezoidal roadways which is under the influence of the bidirectional unequal pressure, homogeneous, isotropic, and elastic rock mass is obtained. Research studies show that the roof-stress distribution of the trapezoidal roadways is uniform and the confining pressure is small, while the two sidewalls and the floor are opposite. The stress distribution of the two sidewalls and the floor varies greatly, and the stress concentration factor is large. The top corner of the trapezoidal roadways is basically not affected by stress concentration, but the stress concentration coefficient at the bottom corner is relatively large, and reinforcement measures are required in the roadway support. Based on the aforementioned research results, the multisupport scheme of "bolting with wire mesh and anchor cable + W-type steel belt + joist steel shed support + anchor cable grouting" was proposed to the surrounding rock of trapezoidal roadways with large stress caused by mining influence, thus solving the actual mining problem.
- Subjects
STRAINS &; stresses (Mechanics); COMPLEX variables; STRESS concentration; STEEL joists; CONFORMAL mapping; ROCK deformation; MICROPOLAR elasticity
- Publication
Shock & Vibration, 2021, p1
- ISSN
1070-9622
- Publication type
Article
- DOI
10.1155/2021/6381785