Author(s)

Ruize Xu ¹, Gaoshang Wang ², Fan Zhang ², Ranghe Zhu ³, Qiang Ma ³

Affiliation(s)

¹ College of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, China
² Xinmi Hengye Co., Ltd, Hecheng Coal Mine, Xinmi, Henan, 452300, China
³ Henan Xuchang Xinlong Mining Co., Ltd., Yuzhou, Henan, 461670, China

Corresponding Author

Ruize Xu

ABSTRACT

Lateral roof cutting technology, used in gob-side entry retention, would to a certain extent destroy the structure of the roof of the mining roadway, which affects the stability of the roadway. This study aimed to assess the stability of the mining roadway, considering the combined effects of the different sealing lengths and the mining stresses. The FLAC3D numerical simulation method was adopted to investigate three conditions: no roof cutting, incomplete roof cutting, and complete roof cutting. The deformation and stress distribution of the surrounding rock in their cases were compared and analyzed. The results show that directional pre-splitting roof cutting can cut off the stress transfer between the roofs, but it also destroys the integrity of the roof, thereby reducing the bearing capacity of the roof. The stresses on one side of the roof can be reduced via incomplete roof cutting, and this method can also maintain the strength of some of the surrounding rock. The peak advanced abutment pressure will increase as the penetration value of the directional roof cutting increases and the stress concentration area will move away from the roadway. The results of this study provide a reference for the determination of the roof cutting parameters in gob-side entry retaining.

KEYWORDS

Underground Coal Mine, Gob-side Entry Retaining, Roadway Support, Numerical Simulation, Roof Cutting and Pressure Release

CITE THIS PAPER

Ruize Xu, Gaoshang Wang, Fan Zhang, Ranghe Zhu, Qiang Ma, Research on the Influence of the Stability of the Rock Surrounding a Mine Roadway under Directional Pre-splitting Blasting. Journal of Civil Engineering and Urban Planning (2024) Vol. 6: 1-9. DOI: http://dx.doi.org/10.23977/jceup.2024.060201.

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