TITLE:
Evaluation and Application of Roadway Surrounding Rock Stability Based on Comprehensive Index Method
AUTHORS:
Jicheng Feng, Zhihai Ji, Xiangye Wu, Jianjun Shi, Chaoyang Dong, Gexuan Niu, Yanqi Gao
KEYWORDS:
Geological Structure, Physical Properties, Stress State, Stability Classification, Support Scheme
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.13 No.8,
August
18,
2025
ABSTRACT: In order to scientifically and quantitatively evaluate the stability of the perimeter rock of the roadway in Baliancheng coal mine, this paper adopts a comprehensive method of field measurement, theoretical analysis, laboratory test and numerical simulation to study the geological and structural characteristics of the perimeter rock of the roadway, the physical and mechanical properties of the perimeter rock as well as the state of the perimeter rock stress, and proposes a comprehensive index method for classifying the stability of the perimeter rock of the roadway. The research results show that: the top plate of 18 coal roadway is mainly medium-hard rock composite top plate of siltstone, medium-grained sandstone and coarse sandstone, and the bottom plate is soft-medium-hard rock composite bottom plate of medium-grained sandstone, fine-grained sandstone and coarse-grained sandstone, the coefficient of coal seam solidity is 1.28, the fissures of perimeter rock are moderately developed, the influence coefficient of mining is 2.71, and the ratio of the maximal horizontal principal stress to the vertical stress is 1.90, the stability grade of 18 coal roadway perimeter rock belongs to medium stable perimeter rock, after adopting the optimized support scheme, the overall deformation of the roadway is relatively reduced compared with the original support scheme, and the support effect of the roadway perimeter rock is good.